Wadden Sea: Difference between revisions

Wadden Sea
UNESCO World Heritage Site
	The Wadden Sea at Süderoog in north Germany
Location	North Sea in Denmark, Germany and the Netherlands
Criteria	Natural: viii, ix, x
Reference	1314
Inscription	2009 (33rd Session)
Extensions	2011, 2014
	1 2 3 4 5 class=notpageimage\| Wadden Sea: Lauwersmeer National Park, Netherlands; Lower Saxon Wadden Sea National Park, Germany; Hamburg Wadden Sea National Park, Germany; Schleswig-Holstein Wadden Sea National Park, Germany; Wadden Sea National Park, Denmark;

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The Wadden Sea (Dutch: Waddenzee [ˈʋɑdə(n)zeː] ^ⓘ; German: Wattenmeer [ˈvatn̩ˌmeːɐ̯] ^ⓘ; Low German: Wattensee or Waddenzee; Danish: Vadehavet; West Frisian: Waadsee; North Frisian: di Heef) is an intertidal zone in the southeastern part of the North Sea. It lies between the coast of northwestern continental Europe and the range of low-lying Frisian Islands, forming a shallow body of water with tidal flats and wetlands. It has a high biological diversity and is an important area for both breeding and migrating birds. In 2009, the Dutch and German parts of the Wadden Sea were inscribed on UNESCO's World Heritage List and the Danish part was added in June 2014.^[1]^[2]

The Wadden Sea stretches from Den Helder, in the northwest of the Netherlands, past the great river estuaries of Germany to its northern boundary at Skallingen in Denmark along a total coastline of some 500 km (310 mi) and a total area of about 10,000 km² (3,900 sq mi). Within the Netherlands, it is bounded from the IJsselmeer by the Afsluitdijk. Historically, the coastal regions were often subjected to large floods, resulting in thousands of deaths, including the Saint Marcellus' floods of 1219 and 1362, Burchardi flood of 1634 and Christmas Flood of 1717. Some of these also significantly changed the coastline.^[3]^[4] Numerous dikes^[5] and several causeways have been built,^[6] and as a result recent floods have resulted in few or no fatalities (even if some dikes rarely and locally have been overrun in recent history).^[3]^[4] This makes it among the most human-altered habitats on the planet.^[7]

Environment

The word wad is Frisian and Dutch for "mud flat" (Low German and German: Watt, Danish: Vade). The area is typified by extensive tidal mud flats, deeper tidal trenches (tidal creeks) and the islands that are contained within this, a region continually contested by land and sea.^[8]

The landscape has been formed for a great part by storm tides in the 10th to 14th centuries, overflowing and carrying away former peat land behind the coastal dunes.^{[citation needed]} The present islands are a remnant of the former coastal dunes.

Towards the North Sea the islands are marked by dunes and wide sandy beaches, and towards the Wadden Sea a low, tidal coast. The impact of waves and currents carrying away sediments is slowly changing both land masses and coastlines. For example, the islands of Vlieland and Ameland have moved eastwards through the centuries, having lost land on one side and added it on the other.^[9]

Fauna

The Wadden Sea is famous for its rich flora and fauna, especially birds. Hundreds of thousands of waders, ducks, and geese use the area as a migration stopover or wintering site. It is also a rich habitat for gulls and terns,^[10] as well as a few species of herons, Eurasian spoonbills and birds-of-prey, including a small and increasing breeding population of white-tailed eagles.^[11] However, the biodiversity of Wadden Sea is smaller today than it once was; for birds, greater flamingos and Dalmatian pelicans used to be common as well, at least during the Holocene climatic optimum when the climate was warmer.^[12]^[13] Due to human activity and a changing environment, species have gone extinct, while others are expected to migrate in.^[14]^[15]

Larger fish including rays, Atlantic salmon and brown trout are still present in several sections of the Wadden Sea, but others like European sea sturgeon only survive in the region through a reintroduction project. The world's only remaining natural population of houting survives in the Danish part of the Wadden Sea and it has been used as a basis for reintroductions further south, but considerable taxonomic confusion remains over its status (whether it is the same as the houting that once lived further south in the Wadden Sea).^[16]^[17] European oyster once formed large beds in the region and was still present until a few decades ago, when extirpated due to a combination of disease and the continued spread of the invasive Pacific oyster, which now forms large beds in the Wadden Sea.^[18] Especially the southwestern part of the Wadden Sea has been greatly reduced. Historically, the Rhine was by far the most important river flowing into this section, but it has been greatly reduced due to dams. As a result, about 90% of all the species that historically inhabited that part of the Wadden Sea are at risk.^[19]

The Wadden Sea is an important habitat for both harbour and grey seals. Harbour porpoises and white-beaked dolphins are the sea's only resident cetaceans. They were once extinct in the southern part of the sea but have also re-colonized that area again.^[20] Many other cetaceans only visit seasonally, or occasionally.^[21]^[22] In early history, North Atlantic right whales and gray whales (now extinct in the North Atlantic)^[23] were present in the region, perhaps using the shallow, calm waters for feeding and breeding. It has been theorized that they were hunted to extinction in this region by shore-based whalers in medieval times.^[24]^[25] They are generally considered long-extinct in the region, but in the Netherlands, a possible right whale was observed close to beaches on Texel in the West Frisian Islands and off Steenbanken, Schouwen-Duiveland in July 2005.^[26] Recent increases in the number of North Atlantic humpback whales and minke whales might have resulted in more visits and possible re-colonization by the species to the areas especially around Marsdiep.^[27]^[28] Future recovery of once-extinct local bottlenose dolphins is also expected.^[20]

Conservation

A number of human-introduced invasive species, including algae, plants, and smaller organisms, are causing negative effects on native species.^[29]

Each of the three countries has designated Ramsar sites in the region (see Wadden Sea National Parks).

Although the Wadden Sea is not yet listed as a transboundary Ramsar site, a great part of the Wadden Sea is protected in cooperation of all three countries. The governments of the Netherlands, Denmark and Germany have been working together since 1978 on the protection and conservation of the Wadden Sea. Co-operation covers management, monitoring and research, as well as political matters. Furthermore, in 1982, a Joint Declaration on the Protection of the Wadden Sea was agreed upon to co-ordinate activities and measures for the protection of the Wadden Sea. In 1997, a Trilateral Wadden Sea Plan was adopted.^[30]^[31]^[32]

In 1986, the Wadden Sea Area was declared a biosphere reserve by UNESCO.^[33]

In June 2009, the Wadden Sea (comprising the Dutch Wadden Sea Conservation Area and the German Wadden Sea National Parks of Lower Saxony and Schleswig-Holstein) was placed on the World Heritage list by UNESCO.^[34] A minor boundary modification in 2011 added the Hamburg Wadden Sea National Park to the site, and the Danish part was added to in 2014.^[35] The state of Bremen, covering part of the Weser River estuary, is not participating. Conservation efforts are coordinated by the Common Wadden Sea Secretariat, seated in Wilhelmshaven.

Recreation

Many of the islands have been popular seaside resorts since the 19th century.

Mudflat hiking, i.e., walking on the sandy flats at low tide, has become popular in the Wadden Sea.^[36]

It is also a popular region for pleasure boating.

Literature

The German part of the Wadden Sea was the setting for the 1903 Erskine Childers novel The Riddle of the Sands and Else Ury's 1915 novel Nesthäkchen in the Children's Sanitorium.

Wadden Sea Region

The area bordering the Wadden Sea, including the Frisian islands and the mainland coastal marshes, is also called the Wadden Coast. In Germany the area is referred to as North Sea Coast (Nordseeküste). The embanked polderlands and saltmarshes in the Wadden Sea area – including the Elbe Marshes – are referred to in Germany as North Sea coastal marshes (Nordseemarschen).

More recent are terms such as Waddenland, Wadden Sea area and Wadden Sea Region. The latter term is generally understood to include all coastal regions around the Wadden Sea that participate in the trilateral cooperation between Denmark, Germany and the Netherlands. The entire area is known for its rich cultural heritage, dating back to the Roman Iron Age and the Middle Ages, and largely coincides with the area internationally referred to as Frisia.^[37] Between 2002 and 2023 stakeholder organizations and NGOs from the Wadden Sea Region cooperated in a platform or association called the Wadden Sea Forum (WSF).^[38]

References

^ Wadden Sea World Heritage Site. Retrieved on 29 April 2010.
^ "Six new sites inscribed on World Heritage List". UNESCO. Retrieved 23 June 2014.
^ ^a ^b "Tusinder af omkomne: Se listen over historiens værste stormfloder". Fyens Stiftstidende. 8 January 2019. Retrieved 15 December 2019.
^ ^a ^b "Stormfloder i Vadehavet". Nationalpark Vadehavet. Archived from the original on 7 February 2019. Retrieved 15 December 2019.
^ "cultural-landscape" (PDF). waddensea-forum.org. Retrieved 4 November 2021.
^ "Poster" (PDF). 1998. Archived (PDF) from the original on 2 May 2017. Retrieved 4 November 2021.
^ C. Michael Hogan (2011). "Wadden Sea". In P. Saundry; C. Cleveland (eds.). Encyclopedia of Earth. Washington DC: National Council for Science and the Environment.
^ Scheffel, Richard L.; Wernet, Susan J., eds. (1980). Natural Wonders of the World. United States of America: Reader's Digest Association, Inc. pp. 408–409. ISBN 0-89577-087-3.
^ @NatGeoNL (18 December 2018). "Wandelende waddeneilanden: hoelang blijven 'onze' eilanden nog bij ons?" [Walking Wadden Islands: how long will 'our' islands stay with us?]. National Geographic (in Dutch). Retrieved 8 September 2022.
^ Couzens, Dominic (2008). Top 100 Birding Sites of the World. University of California Press. pp. 27–29. ISBN 978-0-520-25932-4.
^ "Havørne sætter ny rekord i Danmark". DR. 20 November 2019. Retrieved 15 December 2019.
^ Alanna MitchelA., 2009. 6-Reading the vital signs: life force. pp.78. Halifax, Canada-The fate of the fish. Seasick: Ocean Change and the Extinction of Life on Earth. University of Chicago Press. Retrieved on 29 July 2014
^ Nikulina, E.A.; U. Schmölcke (2015). "First archaeogenetic results verify the mid-Holocene occurrence of Dalmatian pelican Pelecanus crispus far out of present range". Journal of Avian Biology. 46 (4): 344–351. doi:10.1111/jav.00652.
^ "Regional Species Extinctions - Examples of regional species extinctions over the last 1000 years and more" (PDF). archive-it.org. Archived from the original (PDF) on 25 April 2011.
^ Karsten Reise, A natural history of the Wadden Sea – Riddled by contingencies (presentation slides). Wadden Sea Station Sylt - AWI. Retrieved on 29 July 2014
^ Carl, R. and P.R. Møller (2012). Atlas over Danske Ferskvandsfisk. Natural History Museum of Denmark, University of Copenhagen, and DTU Aqua. ISBN 9788787519748
^ Borcherding, J.; M. Heynen; T. Jäger-Kleinicke; H. V. Winter; and R. Eckmann (2010). Re-establishment of the North Sea houting in the River Rhine. Fisheries Management and Ecology 17(3): 291–293. doi:10.1111/j.1365-2400.2009.00710.x
^ "Vi gider ikke spise unikke danske østers". Politiken. 23 October 2012. Retrieved 15 December 2019.
^ MacKinnon B.J., 2013. The Nature of Nature. The Once and Future World: Nature as It Was, as It Is, as It Could Be. pp.100. Retrieved on 29 July 2014
^ ^a ^b Kees (C.J.) Camphuysen. "NZG Marine Mammal Database - Sightings of cetaceans in The Netherlands and the Southern North sea". Archived from the original on 24 October 2021. Retrieved 28 January 2015.
^ metatags generator. "Cetaceans". Archived from the original on 5 April 2014.
^ Lotze K.H. (2005). "Radical changes in the Wadden Sea fauna and flora over the last 2,000 years". Helgoland Marine Research. 59 (1): 71. Bibcode:2005HMR....59...71L. doi:10.1007/s10152-004-0208-0.
^ Mead JG, Mitchell ED (1984). "Atlantic gray whales". In Jones ML, Swartz SL, Leatherwood S (eds.). The Gray Whale. London: Academic Press. pp. 33–53.
^ Szaro C.R., Johnston W.D., Wolff. J.W. et al. 1996. Biodiversity of the Wadden Sea. Biodiversity in Managed Landscapes: Theory and Practice. pp.539. Oxford University Press. Retrieved on 29 July 2014
^ Wolff W. J., 2000. The south-east North Sea: losses of vertebrate fauna during the past 2000 years. Biological Conservation 95: 209-21. Retrieved on 29 July 2014
^ Kees (C.J.) Camphuysen. "WHO HAS AN IDEA WHAT ANIMAL WE ARE LOOKING AT HERE?". Archived from the original on 22 October 2021. Retrieved 1 June 2013.
^ Kees (C.J.) Camphuysen (2007). "Foraging humpback whale (Megaptera novaeangliae)in the Marsdiep area (Wadden Sea), May 2007 and a review of sightings and strandings in the southern North Sea, 2003-2007" (PDF) (Lutra 2007 50 (1): 31-42 ed.). Archived (PDF) from the original on 9 August 2014. Retrieved 29 July 2014.
^ "Springende walvis gezien bij Texel" [Jumping whale seen at Texel]. www.zeezoogdieren.org. 2008. Retrieved 28 January 2015.
^ Wolff W.J., Dankers N., Dilemma' K.S., Reijnders P.J.H., Smit C.J., Chapter 17: Biodiversity of the Wadden Sea (Denmark, Germany, The Netherlands): recent changes and future projections. pp.342. DLO - Institute for Forestry and Nature Research. Retrieved on 29 July 2014
^ "20th Anniversary of the Wadden Sea Plan | Wadden Sea". waddensea-secretariat.org.
^ "Trilateral Monitoring and Assessment Programme (TMAP) | Wadden Sea". waddensea-secretariat.org.
^ The Trilateral Wadden Sea Cooperation at waddensea-secretariat.org. Retrieved on 29 April 2010. Archived 27 February 2012 at the Wayback Machine
^ UNESCO MAB Biosphere reserves directory (last updated May 2012; retrieved 2016-07-19)
^ "World heritage sites: slave outpost and Buddhist mountain on the list – but Wales has to wait". Guardian.co.uk. Retrieved on 7 July 2009.
^ "Hamburg's Wadden Sea National Park turned 30 | Wadden Sea". waddensea-secretariat.org.
^ "Tidal flat walking". Wadden Sea World Heritage. Retrieved 23 December 2017.
^ Linde Egberts and Meindert Schroor (ed.), Waddenland Outstanding. History, Landscape and Cultural Heritage of the Wadden Sea Region, Amsterdam 2018.
^ "Wadden Sea Forum". Wadden Sea Forum e.V. 2023. Retrieved 22 April 2024. The Forum of the Wadden Sea Region, called Wadden Sea Forum (WSF) was an independent multi-stakeholder, multi-actor platform from Denmark, Germany and The Netherlands and contributed to an advanced and sustainable development.

External links

Wadden Sea UNESCO Collection on Google Arts and Culture
Vollmer, M.; Guldberg, M.; Maluck, M.; Marrewijk, D.; Schlicksbier, G. (2001). "Landscape and Cultural Heritage in the Wadden Sea Region - Project Report" (PDF). Wadden Sea Ecosystem. 12.
Knottnerus, Otto S. (2005). "History of human settlement, cultural change and interference with the marine environment".
Secretariat of The Trilateral Cooperation on the Protection of the Wadden Sea
Visit Vesterhavet – tourist information for the Danish North Sea and Wadden Sea
Official Tourist Information for the westernmost part of the German National Park
The Wadden Sea at the UNESCO World Heritage Centre
Wadden Sea World Heritage
LancewadPlan: Integrated Landscape and Cultural Heritage Management and Development Plan for the Wadden Sea Region (A collection of studies on the cultural history of the Wadden Sea Region 2004–2007, internet archive)

[1] Wadden Sea World Heritage Site. Retrieved on 29 April 2010.

[2] "Six new sites inscribed on World Heritage List". UNESCO. Retrieved 23 June 2014.

[Fyens8Jan2019-3] "Tusinder af omkomne: Se listen over historiens værste stormfloder". Fyens Stiftstidende. 8 January 2019. Retrieved 15 December 2019.

[StormflodNationalparkvadehavet-4] "Stormfloder i Vadehavet". Nationalpark Vadehavet. Archived from the original on 7 February 2019. Retrieved 15 December 2019.

[5] "cultural-landscape" (PDF). waddensea-forum.org. Retrieved 4 November 2021.

[6] "Poster" (PDF). 1998. Archived (PDF) from the original on 2 May 2017. Retrieved 4 November 2021.

[7] C. Michael Hogan (2011). "Wadden Sea". In P. Saundry; C. Cleveland (eds.). Encyclopedia of Earth. Washington DC: National Council for Science and the Environment.

[readersnatural-8] Scheffel, Richard L.; Wernet, Susan J., eds. (1980). Natural Wonders of the World. United States of America: Reader's Digest Association, Inc. pp. 408–409. ISBN 0-89577-087-3.

[9] @NatGeoNL (18 December 2018). "Wandelende waddeneilanden: hoelang blijven 'onze' eilanden nog bij ons?" [Walking Wadden Islands: how long will 'our' islands stay with us?]. National Geographic (in Dutch). Retrieved 8 September 2022.

[10] Couzens, Dominic (2008). Top 100 Birding Sites of the World. University of California Press. pp. 27–29. ISBN 978-0-520-25932-4.

[11] "Havørne sætter ny rekord i Danmark". DR. 20 November 2019. Retrieved 15 December 2019.

[12] Alanna MitchelA., 2009. 6-Reading the vital signs: life force. pp.78. Halifax, Canada-The fate of the fish. Seasick: Ocean Change and the Extinction of Life on Earth. University of Chicago Press. Retrieved on 29 July 2014

[Nikulina2015-13] Nikulina, E.A.; U. Schmölcke (2015). "First archaeogenetic results verify the mid-Holocene occurrence of Dalmatian pelican Pelecanus crispus far out of present range". Journal of Avian Biology. 46 (4): 344–351. doi:10.1111/jav.00652.

[14] "Regional Species Extinctions - Examples of regional species extinctions over the last 1000 years and more" (PDF). archive-it.org. Archived from the original (PDF) on 25 April 2011.

[15] Karsten Reise, A natural history of the Wadden Sea – Riddled by contingencies (presentation slides). Wadden Sea Station Sylt - AWI. Retrieved on 29 July 2014

[16] Carl, R. and P.R. Møller (2012). Atlas over Danske Ferskvandsfisk. Natural History Museum of Denmark, University of Copenhagen, and DTU Aqua. ISBN 9788787519748

[17] Borcherding, J.; M. Heynen; T. Jäger-Kleinicke; H. V. Winter; and R. Eckmann (2010). Re-establishment of the North Sea houting in the River Rhine. Fisheries Management and Ecology 17(3): 291–293. doi:10.1111/j.1365-2400.2009.00710.x

[18] "Vi gider ikke spise unikke danske østers". Politiken. 23 October 2012. Retrieved 15 December 2019.

[19] MacKinnon B.J., 2013. The Nature of Nature. The Once and Future World: Nature as It Was, as It Is, as It Could Be. pp.100. Retrieved on 29 July 2014

[NZGDateBase-20] Kees (C.J.) Camphuysen. "NZG Marine Mammal Database - Sightings of cetaceans in The Netherlands and the Southern North sea". Archived from the original on 24 October 2021. Retrieved 28 January 2015.

[21] tatags generator. "Cetaceans". Archived from the original on 5 April 2014.

[22] Lotze K.H. (2005). "Radical changes in the Wadden Sea fauna and flora over the last 2,000 years". Helgoland Marine Research. 59 (1): 71. Bibcode:2005HMR....59...71L. doi:10.1007/s10152-004-0208-0.

[23] Mead JG, Mitchell ED (1984). "Atlantic gray whales". In Jones ML, Swartz SL, Leatherwood S (eds.). The Gray Whale. London: Academic Press. pp. 33–53.

[24] Szaro C.R., Johnston W.D., Wolff. J.W. et al. 1996. Biodiversity of the Wadden Sea. Biodiversity in Managed Landscapes: Theory and Practice. pp.539. Oxford University Press. Retrieved on 29 July 2014

[25] Wolff W. J., 2000. The south-east North Sea: losses of vertebrate fauna during the past 2000 years. Biological Conservation 95: 209-21. Retrieved on 29 July 2014

[26] Kees (C.J.) Camphuysen. "WHO HAS AN IDEA WHAT ANIMAL WE ARE LOOKING AT HERE?". Archived from the original on 22 October 2021. Retrieved 1 June 2013.

[27] Kees (C.J.) Camphuysen (2007). "Foraging humpback whale (Megaptera novaeangliae)in the Marsdiep area (Wadden Sea), May 2007 and a review of sightings and strandings in the southern North Sea, 2003-2007" (PDF) (Lutra 2007 50 (1): 31-42 ed.). Archived (PDF) from the original on 9 August 2014. Retrieved 29 July 2014.

[28] "Springende walvis gezien bij Texel" [Jumping whale seen at Texel]. www.zeezoogdieren.org. 2008. Retrieved 28 January 2015.

[29] Wolff W.J., Dankers N., Dilemma' K.S., Reijnders P.J.H., Smit C.J., Chapter 17: Biodiversity of the Wadden Sea (Denmark, Germany, The Netherlands): recent changes and future projections. pp.342. DLO - Institute for Forestry and Nature Research. Retrieved on 29 July 2014

[30] "20th Anniversary of the Wadden Sea Plan | Wadden Sea". waddensea-secretariat.org.

[31] "Trilateral Monitoring and Assessment Programme (TMAP) | Wadden Sea". waddensea-secretariat.org.

[32] The Trilateral Wadden Sea Cooperation at waddensea-secretariat.org. Retrieved on 29 April 2010. Archived 27 February 2012 at the Wayback Machine

[biospherereserve-33] UNESCO MAB Biosphere reserves directory (last updated May 2012; retrieved 2016-07-19)

[34] "World heritage sites: slave outpost and Buddhist mountain on the list – but Wales has to wait". Guardian.co.uk. Retrieved on 7 July 2009.

[35] "Hamburg's Wadden Sea National Park turned 30 | Wadden Sea". waddensea-secretariat.org.

[36] "Tidal flat walking". Wadden Sea World Heritage. Retrieved 23 December 2017.

[37] Linde Egberts and Meindert Schroor (ed.), Waddenland Outstanding. History, Landscape and Cultural Heritage of the Wadden Sea Region, Amsterdam 2018.

[38] "Wadden Sea Forum". Wadden Sea Forum e.V. 2023. Retrieved 22 April 2024. The Forum of the Wadden Sea Region, called Wadden Sea Forum (WSF) was an independent multi-stakeholder, multi-actor platform from Denmark, Germany and The Netherlands and contributed to an advanced and sustainable development.

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@@ Line 5: / Line 5: @@
 |Image = 13-09-29-nordfriesisches-wattenmeer-RalfR-19.jpg
 |image_size = 280px
+|caption = The Wadden Sea at [[Süderoog]] in north Germany
 |Location = [[North Sea]] in [[Denmark]], [[Germany]] and the [[Netherlands]]
 |ID = 1314
@@ Line 31: / Line 32: @@
 }}}}
-The '''Wadden Sea''' ({{lang-nl|Waddenzee}} {{IPA-nl|ˈʋɑdə(n)zeː||nl-Waddenzee.ogg}}; {{lang-de|Wattenmeer}}; {{lang-nds|Wattensee}} or {{lang|nds|Waddenzee}}; {{lang-da|Vadehavet}}; {{lang-fy|Waadsee|longname=yes}}; {{lang-frr|di Heef}}) is an [[intertidal zone]] in the southeastern part of the [[North Sea]]. It lies between the coast of northwestern [[continental Europe]] and the range of low-lying [[Frisian Islands]], forming a shallow body of water with [[tidal flat]]s and [[wetlands]]. It has a high [[biodiversity|biological diversity]] and is an important area for both breeding and migrating birds. In 2009, the Dutch and German parts of the Wadden Sea were inscribed on [[UNESCO]]'s [[World Heritage List]] and the Danish part was added in June 2014.<ref>[https://waddensea-worldheritage.org Wadden Sea World Heritage Site]. Retrieved on 29 April 2010.</ref><ref>{{cite web |url=https://whc.unesco.org/en/news/1160 |title=Six new sites inscribed on World Heritage List |publisher=[[UNESCO]] |access-date=23 June 2014 }}</ref>
+The '''Wadden Sea''' ({{langx|nl|Waddenzee}} {{IPA|nl|ˈʋɑdə(n)zeː||nl-Waddenzee.ogg}}; {{langx|de|Wattenmeer}} {{IPA|de|ˈvatn̩ˌmeːɐ̯||De-Wattenmeer.ogg}}; {{langx|nds|Wattensee}} or {{lang|nds|Waddenzee}}; {{langx|da|Vadehavet}}; {{langx|fy|Waadsee}}; {{langx|frr|di Heef}}) is an [[intertidal zone]] in the southeastern part of the [[North Sea]]. It lies between the coast of northwestern [[continental Europe]] and the range of low-lying [[Frisian Islands]], forming a shallow body of water with [[tidal flat]]s and [[wetlands]]. It has a high [[biodiversity|biological diversity]] and is an important area for both breeding and migrating birds. In 2009, the Dutch and German parts of the Wadden Sea were inscribed on [[UNESCO]]'s [[World Heritage List]] and the Danish part was added in June 2014.<ref>[https://waddensea-worldheritage.org Wadden Sea World Heritage Site]. Retrieved on 29 April 2010.</ref><ref>{{cite web |url=https://whc.unesco.org/en/news/1160 |title=Six new sites inscribed on World Heritage List |publisher=[[UNESCO]] |access-date=23 June 2014 }}</ref>
-The Wadden Sea stretches from [[Den Helder]], in the northwest of the [[Netherlands]], past the great river [[estuaries]] of [[Germany]] to its northern boundary at [[Skallingen]] in [[Denmark]] along a total coastline of some {{convert|500|km|mi|abbr=on}} and a total area of about {{convert|10000|km2|mi2|abbr=on}}. Within the Netherlands, it is bounded from the [[IJsselmeer]] by the [[Afsluitdijk]]. Historically, the coastal regions were often subjected to large floods, resulting in thousands of deaths, including the [[Saint Marcellus' flood]]s of 1219 and 1362, [[Burchardi flood]] of 1634 and [[Christmas Flood of 1717]]. Some of these also significantly changed the coastline.<ref name=Fyens8Jan2019>{{cite news | title=Tusinder af omkomne: Se listen over historiens værste stormfloder | url=https://fyens.dk/artikel/tusinder-af-omkomne-se-listen-over-historiens-værste-stormfloder | publisher=[[Fyens Stiftstidende]] | date=8 January 2019 | access-date=15 December 2019 }}</ref><ref name=StormflodNationalparkvadehavet>{{cite web| title=Stormfloder i Vadehavet | url=https://nationalparkvadehavet.dk/muligheder/stormfloder/ | publisher=Nationalpark Vadehavet | access-date=15 December 2019 }}</ref> Numerous [[Levee|dike]]s<ref>{{cite web |url=https://waddensea-forum.org/images/archive/cultural-landscape/wadden-sea-comp-study_culture.pdf |title=cultural-landscape |website=waddensea-forum.org |access-date=2021-11-04}}</ref> and several [[causeway]]s have been built,<ref>{{cite web|url=https://web.archive.org/web/20170502205444/stefannehring.de/downloads/Poster-19_Nehring-1998_sabellaria.pdf |title=Poster |date=1998 |accessdate=2021-11-04}}</ref> and as a result recent floods have resulted in few or no fatalities (even if some dikes rarely and locally have been overrun in recent history).<ref name=Fyens8Jan2019/><ref name=StormflodNationalparkvadehavet/> This makes it among the most human-altered habitats on the planet.<ref>{{cite encyclopedia |author=C. Michael Hogan |year=2011 |url=https://editors.eol.org/eoearth/wiki/Wadden_Sea|title=Wadden Sea |editor1=P. Saundry |editor2=C. Cleveland |encyclopedia=Encyclopedia of Earth |publisher=National Council for Science and the Environment |location=Washington DC }}</ref>
+The Wadden Sea stretches from [[Den Helder]], in the northwest of the [[Netherlands]], past the great river [[estuaries]] of [[Germany]] to its northern boundary at [[Skallingen]] in [[Denmark]] along a total coastline of some {{convert|500|km|mi|abbr=on}} and a total area of about {{convert|10000|km2|mi2|abbr=on}}. Within the Netherlands, it is bounded from the [[IJsselmeer]] by the [[Afsluitdijk]]. Historically, the coastal regions were often subjected to large floods, resulting in thousands of deaths, including the [[Saint Marcellus' flood]]s of 1219 and 1362, [[Burchardi flood]] of 1634 and [[Christmas Flood of 1717]]. Some of these also significantly changed the coastline.<ref name=Fyens8Jan2019>{{cite news | title=Tusinder af omkomne: Se listen over historiens værste stormfloder | url=https://fyens.dk/artikel/tusinder-af-omkomne-se-listen-over-historiens-værste-stormfloder | publisher=[[Fyens Stiftstidende]] | date=8 January 2019 | access-date=15 December 2019 }}</ref><ref name=StormflodNationalparkvadehavet>{{cite web | title=Stormfloder i Vadehavet | url=https://nationalparkvadehavet.dk/muligheder/stormfloder/ | publisher=Nationalpark Vadehavet | access-date=15 December 2019 | archive-date=7 February 2019 | archive-url=https://web.archive.org/web/20190207015500/https://nationalparkvadehavet.dk/muligheder/stormfloder/ | url-status=dead }}</ref> Numerous [[Levee|dike]]s<ref>{{cite web |url=https://waddensea-forum.org/images/archive/cultural-landscape/wadden-sea-comp-study_culture.pdf |title=cultural-landscape |website=waddensea-forum.org |access-date=2021-11-04}}</ref> and several [[causeway]]s have been built,<ref>{{cite web |url=http://stefannehring.de/downloads/Poster-19_Nehring-1998_sabellaria.pdf |archive-url=https://web.archive.org/web/20170502205444/http://stefannehring.de/downloads/Poster-19_Nehring-1998_sabellaria.pdf |archive-date=2017-05-02 |title=Poster |date=1998 |access-date=2021-11-04 |url-status=live }}</ref> and as a result recent floods have resulted in few or no fatalities (even if some dikes rarely and locally have been overrun in recent history).<ref name=Fyens8Jan2019/><ref name=StormflodNationalparkvadehavet/> This makes it among the most human-altered habitats on the planet.<ref>{{cite encyclopedia |author=C. Michael Hogan |year=2011 |url=https://editors.eol.org/eoearth/wiki/Wadden_Sea|title=Wadden Sea |editor1=P. Saundry |editor2=C. Cleveland |encyclopedia=Encyclopedia of Earth |publisher=National Council for Science and the Environment |location=Washington DC }}</ref>
 == Environment ==
 [[File:Morze Wattowe.png|thumb|left|Map showing the Wadden Sea in dark blue]]
 [[File:Westerhever salzwiesenrest.JPG|thumb|[[Salt marsh]] and [[mudflat]]s in [[Westerhever]], Germany]]
-The word ''wad'' is Frisian and Dutch for "mud flat" ([[Low German]] and {{lang-de|Watt}}, {{lang-da|Vade}}). The area is typified by extensive tidal [[mud flat]]s, deeper tidal trenches ([[Creek (tidal)|tidal creeks]]) and the islands that are contained within this, a region continually contested by land and sea.<ref name="readersnatural">{{Cite book|title=Natural Wonders of the World|publisher=Reader's Digest Association, Inc|year=1980|isbn=0-89577-087-3|editor-last=Scheffel|editor-first=Richard L.|location=United States of America|pages=408–409|editor-last2=Wernet|editor-first2=Susan J.}}</ref>
+The word ''wad'' is Frisian and Dutch for "mud flat" ([[Low German]] and {{langx|de|Watt}}, {{langx|da|Vade}}). The area is typified by extensive tidal [[mud flat]]s, deeper tidal trenches ([[Creek (tidal)|tidal creeks]]) and the islands that are contained within this, a region continually contested by land and sea.<ref name="readersnatural">{{Cite book |title=Natural Wonders of the World |publisher=Reader's Digest Association, Inc |year=1980 |isbn=0-89577-087-3 |editor-last=Scheffel |editor-first=Richard L. |location=United States of America |pages=408–409 |editor-last2=Wernet |editor-first2=Susan J.}}</ref>
-The landscape has been formed for a great part by [[storm tide]]s in the 10th to 14th centuries, overflowing and carrying away former [[peat]] land behind the coastal dunes. The present islands are a remnant of the former coastal dunes.
+The landscape has been formed for a great part by [[storm tide]]s in the 10th to 14th centuries, overflowing and carrying away former [[peat]] land behind the coastal dunes.{{citation needed|date=August 2022}} The present islands are a remnant of the former coastal dunes.
-Towards the North Sea the islands are marked by dunes and wide sandy beaches,  and towards the Wadden Sea a low, tidal coast. The impact of waves and currents carrying away [[sediment]]s is slowly changing both land masses and coastlines. For example, the islands of [[Vlieland]] and [[Ameland]] have moved eastwards through the centuries, having lost land on one side and added it on the other.
+Towards the North Sea the islands are marked by dunes and wide sandy beaches,  and towards the Wadden Sea a low, tidal coast. The impact of waves and currents carrying away [[sediment]]s is slowly changing both land masses and coastlines. For example, the islands of [[Vlieland]] and [[Ameland]] have moved eastwards through the centuries, having lost land on one side and added it on the other.<ref>{{Cite web |last=@NatGeoNL |date=2018-12-18 |title=Wandelende waddeneilanden: hoelang blijven 'onze' eilanden nog bij ons? |trans-title=Walking Wadden Islands: how long will 'our' islands stay with us? |url=https://www.nationalgeographic.nl/milieu/2018/12/wandelende-waddeneilanden-hoelang-blijven-onze-eilanden-nog-bij-ons |access-date=2022-09-08 |website=National Geographic |language=nl}}</ref>
 == Fauna ==
@@ Line 48: / Line 49: @@
 [[File:Phoca vitulina Terschelling.jpg|thumb|[[Harbor seal]]s on [[Terschelling]], [[Netherlands]]]]
-The Wadden Sea is famous for its rich [[flora]] and [[Fauna (animals)|fauna]], especially birds. Hundreds of thousands of [[wader]]s, [[duck]]s, and [[geese]] use the area as a [[Bird migration|migration]] stopover or wintering site. It is also a rich habitat for [[gull]]s and [[tern]]s,<ref>{{Cite book |last = Couzens |first = Dominic |title = Top 100 Birding Sites of the World |publisher = [[University of California Press]] |year = 2008 |isbn = 978-0-520-25932-4 |pages = 27–29}}</ref> as well as a few species of [[heron]]s, [[Eurasian spoonbill]]s and [[Bird of prey|birds-of-prey]], including a small and increasing breeding population of [[white-tailed eagle]]s.<ref>{{cite news | title=Havørne sætter ny rekord i Danmark | url=https://www.dr.dk/nyheder/indland/havorne-saetter-ny-rekord-i-danmark | publisher=[[DR (broadcaster)|DR]] | date=20 November 2019 | access-date=15 December 2019 }}</ref> However, the biodiversity of Wadden Sea is smaller today than it once was; for birds, [[greater flamingo]]s and [[Dalmatian pelican]]s used to be common as well, at least during the [[Holocene climatic optimum]] when the climate was warmer.<ref>Alanna MitchelA., 2009. [https://archive.org/details/seasickoceanchan00mitc/page/78 <!-- quote=right whale. --> 6-Reading the vital signs: life force]. pp.78. Halifax, Canada-The fate of the fish. Seasick: Ocean Change and the Extinction of Life on Earth. [[University of Chicago Press]]. Retrieved on 29 July 2014</ref><ref name=Nikulina2015>{{Cite journal | author1=Nikulina, E.A. | author2=U. Schmölcke | year=2015 | title=First archaeogenetic results verify the mid-Holocene occurrence of Dalmatian pelican Pelecanus crispus far out of present range | journal=Journal of Avian Biology | volume=46 | issue=4 | pages=344–351 | doi=10.1111/jav.00652 }}</ref> Due to human activity and a changing environment, species have gone extinct, while others are expected to migrate in.<ref>{{cite web|url=http://www.fmap.ca//ramweb/media/biodiversity_loss/downloads/RegionalExtinctionExamples.pdf|archive-url=https://wayback.archive-it.org/all/20110425162323/http://www.fmap.ca//ramweb/media/biodiversity_loss/downloads/RegionalExtinctionExamples.pdf|url-status=dead|archive-date=2011-04-25|title=Regional Species Extinctions - Examples of regional species extinctions over the last 1000 years and more.|website=archive-it.org}}</ref><ref>Karsten Reise, [https://waddensea-worldheritage.org/sites/default/files/2012_natural%20history.pdf A natural history of the Wadden Sea – Riddled by contingencies] ([https://web.archive.org/web/20181011133320/waddensea-secretariat.org/sites/default/files/downloads/reise.pdf presentation slides]). Wadden Sea Station Sylt - AWI. Retrieved on 29 July 2014</ref>
+The Wadden Sea is famous for its rich [[flora]] and [[Fauna (animals)|fauna]], especially birds. Hundreds of thousands of [[wader]]s, [[duck]]s, and [[geese]] use the area as a [[Bird migration|migration]] stopover or wintering site. It is also a rich habitat for [[gull]]s and [[tern]]s,<ref>{{Cite book |last = Couzens |first = Dominic |title = Top 100 Birding Sites of the World |publisher = [[University of California Press]] |year = 2008 |isbn = 978-0-520-25932-4 |pages = 27–29}}</ref> as well as a few species of [[heron]]s, [[Eurasian spoonbill]]s and [[Bird of prey|birds-of-prey]], including a small and increasing breeding population of [[white-tailed eagle]]s.<ref>{{cite news | title=Havørne sætter ny rekord i Danmark | url=https://www.dr.dk/nyheder/indland/havorne-saetter-ny-rekord-i-danmark | publisher=[[DR (broadcaster)|DR]] | date=20 November 2019 | access-date=15 December 2019 }}</ref> However, the biodiversity of Wadden Sea is smaller today than it once was; for birds, [[greater flamingo]]s and [[Dalmatian pelican]]s used to be common as well, at least during the [[Holocene climatic optimum]] when the climate was warmer.<ref>Alanna MitchelA., 2009. [https://archive.org/details/seasickoceanchan00mitc/page/78 <!-- quote=right whale. --> 6-Reading the vital signs: life force]. pp.78. Halifax, Canada-The fate of the fish. Seasick: Ocean Change and the Extinction of Life on Earth. [[University of Chicago Press]]. Retrieved on 29 July 2014</ref><ref name=Nikulina2015>{{Cite journal | author1=Nikulina, E.A. | author2=U. Schmölcke | year=2015 | title=First archaeogenetic results verify the mid-Holocene occurrence of Dalmatian pelican Pelecanus crispus far out of present range | journal=Journal of Avian Biology | volume=46 | issue=4 | pages=344–351 | doi=10.1111/jav.00652 }}</ref> Due to human activity and a changing environment, species have gone extinct, while others are expected to migrate in.<ref>{{cite web |url=http://www.fmap.ca//ramweb/media/biodiversity_loss/downloads/RegionalExtinctionExamples.pdf |archive-url=https://wayback.archive-it.org/all/20110425162323/http://www.fmap.ca//ramweb/media/biodiversity_loss/downloads/RegionalExtinctionExamples.pdf |url-status=dead |archive-date=2011-04-25 |title=Regional Species Extinctions - Examples of regional species extinctions over the last 1000 years and more. |website=archive-it.org}}</ref><ref>Karsten Reise, [https://waddensea-worldheritage.org/sites/default/files/2012_natural%20history.pdf A natural history of the Wadden Sea – Riddled by contingencies] ([https://web.archive.org/web/20181011133320/waddensea-secretariat.org/sites/default/files/downloads/reise.pdf presentation slides]). Wadden Sea Station Sylt - AWI. Retrieved on 29 July 2014</ref>
-Larger fish including [[Ray (fish)|rays]], [[Atlantic salmon]] and [[brown trout]] are still present in several sections of the Wadden Sea, but others like [[European sea sturgeon]] only survive in the region through a reintroduction project. The world's only remaining natural population of [[houting]] survives in the Danish part of the Wadden Sea and it has been used as a basis for reintroductions further south, but considerable [[Taxonomy (biology)|taxonomic]] confusion remains over its status (whether it is the same as the houting that once lived further south in the Wadden Sea).<ref>Carl, R. and P.R. Møller (2012). Atlas over Danske Ferskvandsfisk. [[Natural History Museum of Denmark]], University of Copenhagen, and [[Technical University of Denmark|DTU]] Aqua. {{isbn|9788787519748}}</ref><ref>Borcherding, J.; M. Heynen; T. Jäger-Kleinicke; H. V. Winter; and R. Eckmann (2010). Re-establishment of the North Sea houting in the River Rhine. Fisheries Management and Ecology 17(3): 291–293. {{DOI|10.1111/j.1365-2400.2009.00710.x}}</ref> [[European oyster]] once formed large beds in the region and was still present until a few decades ago, when extirpated due to a combination of disease and the continued spread of the invasive [[Pacific oyster]], which now forms large beds in the Wadden Sea.<ref>{{cite news | title=Vi gider ikke spise unikke danske østers | url=https://politiken.dk/mad/madnyt/art5470509/Vi-gider-ikke-spise-unikke-danske-østers | publisher=[[Politiken]] | date=23 October 2012 | access-date=15 December 2019 }}</ref> Especially the southwestern part of the Wadden Sea has been greatly reduced. Historically, the [[Rhine]] was by far the most important river flowing into this section, but it has been greatly reduced due to dams. As a result, about 90% of all the species which historically inhabited that part of the Wadden Sea are at risk.<ref>MacKinnon B.J., 2013. [https://books.google.com/books?id=1RyqAAAAQBAJ&pg=PA99&lpg=PA99&dq=wadden+sea+right+whale&source=bl&ots=10ZPRaV0in&sig=tShLNwt_diRM6g2OEZCpoUq6uWc&hl=en&sa=X&ei=i2DXU4HGOs2F8gWU7YDoDw&ved=0CEMQ6AEwCTgK#v=onepage&q=wadden%20sea%20right%20whale&f=false The Nature of Nature]. The Once and Future World: Nature as It Was, as It Is, as It Could Be. pp.100. Retrieved on 29 July 2014</ref>
+Larger fish including [[Ray (fish)|rays]], [[Atlantic salmon]] and [[brown trout]] are still present in several sections of the Wadden Sea, but others like [[European sea sturgeon]] only survive in the region through a reintroduction project. The world's only remaining natural population of [[houting]] survives in the Danish part of the Wadden Sea and it has been used as a basis for reintroductions further south, but considerable [[Taxonomy (biology)|taxonomic]] confusion remains over its status (whether it is the same as the houting that once lived further south in the Wadden Sea).<ref>Carl, R. and P.R. Møller (2012). Atlas over Danske Ferskvandsfisk. [[Natural History Museum of Denmark]], University of Copenhagen, and [[Technical University of Denmark|DTU]] Aqua. {{isbn|9788787519748}}</ref><ref>Borcherding, J.; M. Heynen; T. Jäger-Kleinicke; H. V. Winter; and R. Eckmann (2010). Re-establishment of the North Sea houting in the River Rhine. Fisheries Management and Ecology 17(3): 291–293. {{doi|10.1111/j.1365-2400.2009.00710.x}}</ref> [[European oyster]] once formed large beds in the region and was still present until a few decades ago, when extirpated due to a combination of disease and the continued spread of the invasive [[Pacific oyster]], which now forms large beds in the Wadden Sea.<ref>{{cite news | title=Vi gider ikke spise unikke danske østers | url=https://politiken.dk/mad/madnyt/art5470509/Vi-gider-ikke-spise-unikke-danske-østers | publisher=[[Politiken]] | date=23 October 2012 | access-date=15 December 2019 }}</ref> Especially the southwestern part of the Wadden Sea has been greatly reduced. Historically, the [[Rhine]] was by far the most important river flowing into this section, but it has been greatly reduced due to dams. As a result, about 90% of all the species that historically inhabited that part of the Wadden Sea are at risk.<ref>MacKinnon B.J., 2013. [https://books.google.com/books?id=1RyqAAAAQBAJ&dq=wadden+sea+right+whale&pg=PA99 The Nature of Nature]. The Once and Future World: Nature as It Was, as It Is, as It Could Be. pp.100. Retrieved on 29 July 2014</ref>
-The Wadden Sea is an important habitat for both [[harbour seals|harbour]] and [[grey seal]]s. [[Harbour porpoise]]s and [[white-beaked dolphin]]s are the sea's only resident [[cetacean]]s. They were once extinct in the southern part of the sea but have also re-colonized that area again.<ref name=NZGDateBase>{{cite web|author=Kees (C.J.) Camphuysen|title=NZG Marine Mammal Database - Sightings of cetaceans in The Netherlands and the Southern North sea|url=https://home.kpn.nl/~camphuys/Cetacea.html|access-date=28 January 2015}}</ref> Many other cetaceans only visit seasonally, or occasionally.<ref>{{cite web|url=http://www.zeeinzicht.nl/vleet/index.php?id=4185&template=template-vleeteng&language=2&item=Cetaceans|archive-url=https://archive.today/20140405080841/http://www.zeeinzicht.nl/vleet/index.php?id=4185&template=template-vleeteng&language=2&item=Cetaceans|url-status=dead|archive-date=2014-04-05|title=Cetaceans|author=metatags generator}}</ref><ref>{{cite journal|author=Lotze K.H.|year=2005|title=Radical changes in the Wadden Sea fauna and flora over the last 2,000 years|journal=Helgoland Marine Research|volume=59|issue=1|page=71|doi=10.1007/s10152-004-0208-0|bibcode=2005HMR....59...71L|doi-access=free}}</ref> In early history, [[North Atlantic right whale]]s and [[gray whale]]s (now extinct in the North Atlantic)<ref>{{Cite book|vauthors=Mead JG, Mitchell ED|veditors=Jones ML, Swartz SL, Leatherwood S|title=The Gray Whale|year=1984|publisher=Academic Press|location=London|pages=33–53|chapter=Atlantic gray whales}}</ref> were present in region, perhaps using the shallow, calm waters for feeding and breeding. It has been theorized that they were hunted to extinction in this region by shore-based whalers in medieval times.<ref>Szaro C.R., Johnston W.D., Wolff. J.W. et al. 1996. [https://books.google.com/books?id=mQ5W4ycPBjUC&pg=PA539&lpg=PA539&dq=wadden+sea+right+whale&source=bl&ots=TfgpYAM9IQ&sig=asBvkV0KVJxM73DkbrO_PeWv2FQ&hl=en&sa=X&ei=ZmDXU6fUO9aD8gWY8ID4BA&ved=0CDoQ6AEwBQ#v=onepage&q=wadden%20sea%20right%20whale&f=false Biodiversity of the Wadden Sea]. Biodiversity in Managed Landscapes: Theory and Practice. pp.539. [[Oxford University Press]]. Retrieved on 29 July 2014</ref><ref>Wolff W. J., 2000. The south-east North Sea: losses of vertebrate fauna during the past 2000 years. Biological Conservation 95: 209-21. Retrieved on 29 July 2014</ref> They are generally considered long-extinct in the region, but in the Netherlands a possible right whale was observed close to beaches on [[Texel]] in the [[West Frisian Islands]] and off Steenbanken, [[Schouwen-Duiveland]] in July 2005.<ref>{{cite web |url=https://home.kpn.nl/~camphuys/flukes.html |title=WHO HAS AN IDEA WHAT ANIMAL WE ARE LOOKING AT HERE? |author=Kees (C.J.) Camphuysen |access-date=2013-06-01}}</ref> Recent increases in number of North Atlantic [[humpback whale]]s and [[minke whale]]s might have resulted in more visits and possible re-colonization by the species to the areas especially around [[Marsdiep]].<ref>{{cite web |url=https://zoogdierwinkel.nl/sites/default/files/imce/nieuwesite/Publicatie%20fotos/Lutra/downloads/50-1_Camphuys_ea.pdf |archive-url=https://web.archive.org/web/20140809052046/zoogdierwinkel.nl/sites/default/files/imce/nieuwesite/Publicatie%20fotos/Lutra/downloads/50-1_Camphuys_ea.pdf |url-status=live |archive-date=9 August 2014 |title=Foraging humpback whale (Megaptera novaeangliae)in the Marsdiep area (Wadden Sea), May 2007 and a review of sightings and strandings in the southern North Sea, 2003-2007 |author=Kees (C.J.) Camphuysen |year=2007 |edition=Lutra 2007 50 (1): 31-42 |access-date=29 July 2014 }}</ref><ref>{{cite web|publisher=www.zeezoogdieren.org|year=2008|title=Springende walvis gezien bij Texel|url=https://zeezoogdieren.org/wordpress/2008/10/21/springende-walvis-gezien-bij-texel|access-date=28 January 2015}}</ref> Future recovery of once-extinct local [[bottlenose dolphin]]s is also expected.<ref name=NZGDateBase />
+The Wadden Sea is an important habitat for both [[harbour seals|harbour]] and [[grey seal]]s. [[Harbour porpoise]]s and [[white-beaked dolphin]]s are the sea's only resident [[cetacean]]s. They were once extinct in the southern part of the sea but have also re-colonized that area again.<ref name=NZGDateBase>{{cite web |author=Kees (C.J.) Camphuysen |title=NZG Marine Mammal Database - Sightings of cetaceans in The Netherlands and the Southern North sea |url=https://home.kpn.nl/~camphuys/Cetacea.html |access-date=28 January 2015 |archive-date=24 October 2021 |archive-url=https://web.archive.org/web/20211024093506/https://home.kpn.nl/~camphuys/Cetacea.html |url-status=dead }}</ref> Many other cetaceans only visit seasonally, or occasionally.<ref>{{cite web |url=http://www.zeeinzicht.nl/vleet/index.php?id=4185&template=template-vleeteng&language=2&item=Cetaceans |archive-url=https://archive.today/20140405080841/http://www.zeeinzicht.nl/vleet/index.php?id=4185&template=template-vleeteng&language=2&item=Cetaceans |url-status=dead |archive-date=2014-04-05 |title=Cetaceans |author=metatags generator}}</ref><ref>{{cite journal |author=Lotze K.H.|year=2005|title=Radical changes in the Wadden Sea fauna and flora over the last 2,000 years|journal=Helgoland Marine Research |volume=59 |issue=1 |page=71 |doi=10.1007/s10152-004-0208-0 |bibcode=2005HMR....59...71L |doi-access=free}}</ref> In early history, [[North Atlantic right whale]]s and [[gray whale]]s (now extinct in the North Atlantic)<ref>{{Cite book |vauthors=Mead JG, Mitchell ED |veditors=Jones ML, Swartz SL, Leatherwood S |title=The Gray Whale |year=1984 |publisher=Academic Press |location=London |pages=33–53 |chapter=Atlantic gray whales}}</ref> were present in the region, perhaps using the shallow, calm waters for feeding and breeding. It has been theorized that they were hunted to extinction in this region by shore-based whalers in medieval times.<ref>Szaro C.R., Johnston W.D., Wolff. J.W. et al. 1996. [https://books.google.com/books?id=mQ5W4ycPBjUC&dq=wadden+sea+right+whale&pg=PA539 Biodiversity of the Wadden Sea]. Biodiversity in Managed Landscapes: Theory and Practice. pp.539. [[Oxford University Press]]. Retrieved on 29 July 2014</ref><ref>Wolff W. J., 2000. The south-east North Sea: losses of vertebrate fauna during the past 2000 years. Biological Conservation 95: 209-21. Retrieved on 29 July 2014</ref> They are generally considered long-extinct in the region, but in the Netherlands, a possible right whale was observed close to beaches on [[Texel]] in the [[West Frisian Islands]] and off Steenbanken, [[Schouwen-Duiveland]] in July 2005.<ref>{{cite web |url=https://home.kpn.nl/~camphuys/flukes.html |title=WHO HAS AN IDEA WHAT ANIMAL WE ARE LOOKING AT HERE? |author=Kees (C.J.) Camphuysen |access-date=2013-06-01 |archive-date=22 October 2021 |archive-url=https://web.archive.org/web/20211022024547/https://home.kpn.nl/~camphuys/flukes.html |url-status=dead }}</ref> Recent increases in the number of North Atlantic [[humpback whale]]s and [[minke whale]]s might have resulted in more visits and possible re-colonization by the species to the areas especially around [[Marsdiep]].<ref>{{cite web |url=https://zoogdierwinkel.nl/sites/default/files/imce/nieuwesite/Publicatie%20fotos/Lutra/downloads/50-1_Camphuys_ea.pdf |archive-url=https://web.archive.org/web/20140809052046/zoogdierwinkel.nl/sites/default/files/imce/nieuwesite/Publicatie%20fotos/Lutra/downloads/50-1_Camphuys_ea.pdf |url-status=live |archive-date=9 August 2014 |title=Foraging humpback whale (Megaptera novaeangliae)in the Marsdiep area (Wadden Sea), May 2007 and a review of sightings and strandings in the southern North Sea, 2003-2007 |author=Kees (C.J.) Camphuysen |year=2007 |edition=Lutra 2007 50 (1): 31-42 |access-date=29 July 2014 }}</ref><ref>{{cite web |publisher=www.zeezoogdieren.org |year=2008 |title=Springende walvis gezien bij Texel |trans-title=Jumping whale seen at Texel |url=https://zeezoogdieren.org/wordpress/2008/10/21/springende-walvis-gezien-bij-texel |access-date=28 January 2015}}</ref> Future recovery of once-extinct local [[bottlenose dolphin]]s is also expected.<ref name=NZGDateBase />
 == Conservation ==
-[[File:13-09-29-nordfriesisches-wattenmeer-RalfR-05.jpg|thumb|left|[[North Frisian Islands]]]]
+[[File:13-09-29-nordfriesisches-wattenmeer-RalfR-05.jpg|thumb|left|[[North Frisian Islands]], ([[Sylt]])]]
 A number of human-introduced [[invasive species]], including [[algae]], plants, and smaller organisms, are causing negative effects on native species.<ref>Wolff W.J., Dankers N., Dilemma' K.S., Reijnders P.J.H., Smit C.J., [https://vliz.be/imisdocs/publications/212518.pdf Chapter 17: Biodiversity of the Wadden Sea (Denmark, Germany, The Netherlands): recent changes and future projections]. pp.342. DLO - Institute for Forestry and Nature Research. Retrieved on 29 July 2014</ref>
-Each of three countries has designated [[Ramsar site]]s in the region (see [[Wadden Sea National Parks]]).
+Each of the three countries has designated [[Ramsar site]]s in the region (see [[Wadden Sea National Parks]]).
+Although the Wadden Sea is not yet listed as a transboundary Ramsar site, a great part of the Wadden Sea is protected in cooperation of all three countries. The governments of the Netherlands, Denmark and Germany have been working together since 1978 on the protection and conservation of the Wadden Sea. Co-operation covers management, monitoring and research, as well as political matters. Furthermore, in 1982, a Joint Declaration on the Protection of the Wadden Sea was agreed upon to co-ordinate activities and measures for the protection of the Wadden Sea. In 1997, a [[Trilateral Wadden Sea Plan]] was adopted.<ref>{{cite web |url=https://waddensea-secretariat.org/news/20th-anniversary-wadden-sea-plan |title=20th Anniversary of the Wadden Sea Plan &#124; Wadden Sea |website=waddensea-secretariat.org}}</ref><ref>{{cite web |url=https://waddensea-secretariat.org/trilateral-monitoring-and-assessment-programme-tmap |title=Trilateral Monitoring and Assessment Programme (TMAP) &#124; Wadden Sea |website=waddensea-secretariat.org}}</ref><ref>[https://waddensea-secretariat.org/trilateral-wadden-sea-cooperation ''The Trilateral Wadden Sea Cooperation''] at waddensea-secretariat.org. Retrieved on 29 April 2010.  {{webarchive |url=https://web.archive.org/web/20120227154648/http://www.waddensea-secretariat.org/trilat/trilat.html |date=27 February 2012 }}</ref>
-Although the Wadden Sea is not yet listed as a transboundary Ramsar site, a great part of the Wadden Sea is protected in cooperation of all three countries.
-The governments of the Netherlands, Denmark and Germany have been working together since 1978 on the protection and conservation of the Wadden Sea. Co-operation covers management, monitoring and research, as well as political matters. Furthermore, in 1982, a Joint Declaration on the Protection of the Wadden Sea was agreed upon to co-ordinate activities and measures for the protection of the Wadden Sea. In 1997, a [[Trilateral Wadden Sea Plan]] was adopted.<ref>{{cite web|url=https://waddensea-secretariat.org/news/20th-anniversary-wadden-sea-plan|title=20th Anniversary of the Wadden Sea Plan &#124; Wadden Sea|website=waddensea-secretariat.org}}</ref><ref>{{cite web|url=https://waddensea-secretariat.org/trilateral-monitoring-and-assessment-programme-tmap|title=Trilateral Monitoring and Assessment Programme (TMAP) &#124; Wadden Sea|website=waddensea-secretariat.org}}</ref><ref>[https://waddensea-secretariat.org/trilateral-wadden-sea-cooperation ''The Trilateral Wadden Sea Cooperation''] at waddensea-secretariat.org. Retrieved on 29 April 2010.  {{webarchive |url=https://web.archive.org/web/20120227154648/http://www.waddensea-secretariat.org/trilat/trilat.html |date=27 February 2012 }}</ref>
 In 1986, the Wadden Sea Area was declared a [[biosphere reserve]] by [[UNESCO]].<ref name=biospherereserve>[https://web.archive.org/web/20210614173015/unesco.org/new/en/natural-sciences/environment/ecological-sciences/biosphere-reserves/europe-north-america/netherlands/waddensea-area UNESCO MAB Biosphere reserves directory] (last updated May 2012; retrieved 2016-07-19)</ref>
-In June 2009, the Wadden Sea (comprising the Dutch Wadden Sea Conservation Area and the German Wadden Sea National Parks of Lower Saxony and Schleswig-Holstein) was placed on the [[World Heritage]] list by [[UNESCO]].<ref>"[https://www.theguardian.com/travel/2009/jun/26/unesco-world-heritage-sites World heritage sites: slave outpost and Buddhist mountain on the list – but Wales has to wait]". [[Guardian.co.uk]]. Retrieved on 7 July 2009.</ref> A minor boundary modification in 2011 added the [[Hamburg Wadden Sea National Park]] to the site, and the Danish part was added to in 2014.<ref>{{cite web|url=https://waddensea-secretariat.org/news/hamburg%E2%80%99s-wadden-sea-national-park-turned-30|title=Hamburg's Wadden Sea National Park turned 30 &#124; Wadden Sea|website=waddensea-secretariat.org}}</ref>
+In June 2009, the Wadden Sea (comprising the Dutch Wadden Sea Conservation Area and the German Wadden Sea National Parks of Lower Saxony and Schleswig-Holstein) was placed on the [[World Heritage]] list by [[UNESCO]].<ref>"[https://www.theguardian.com/travel/2009/jun/26/unesco-world-heritage-sites World heritage sites: slave outpost and Buddhist mountain on the list – but Wales has to wait]". [[Guardian.co.uk]]. Retrieved on 7 July 2009.</ref> A minor boundary modification in 2011 added the [[Hamburg Wadden Sea National Park]] to the site, and the Danish part was added to in 2014.<ref>{{cite web |url=https://waddensea-secretariat.org/news/hamburg%E2%80%99s-wadden-sea-national-park-turned-30 |title=Hamburg's Wadden Sea National Park turned 30 &#124; Wadden Sea |website=waddensea-secretariat.org}}</ref> The [[Bremen (state)|state of Bremen]], covering part of the [[Weser]] River estuary, is not participating. Conservation efforts are coordinated by the Common Wadden Sea Secretariat, seated in [[Wilhelmshaven]].
 == Recreation ==
@@ Line 74: / Line 73: @@
 Many of the islands have been popular [[seaside resort]]s since the 19th century.
-[[Mudflat hiking]], i.e., walking on the sandy flats at low tide, has become popular in the Wadden Sea.<ref>{{cite web|title=Tidal flat walking|url=https://www.waddensea-worldheritage.org/experience-wadden-sea/things-do/tidal-flat-walking|website=Wadden Sea World Heritage|access-date=23 December 2017}}</ref>
+[[Mudflat hiking]], i.e., walking on the sandy flats at low tide, has become popular in the Wadden Sea.<ref>{{cite web |title=Tidal flat walking |url=https://www.waddensea-worldheritage.org/experience-wadden-sea/things-do/tidal-flat-walking |website=Wadden Sea World Heritage |access-date=23 December 2017}}</ref>
 It is also a popular region for pleasure boating.
@@ Line 81: / Line 80: @@
 The German part of the Wadden Sea was the setting for the 1903 [[Robert Erskine Childers|Erskine Childers]] novel ''[[The Riddle of the Sands]]'' and [[Else Ury]]'s 1915 novel ''[[Nesthäkchen in the Children's Sanitorium]]''.
+== Wadden Sea Region ==
+The area bordering the Wadden Sea, including the [[Frisian islands]] and the mainland [[tidal marsh|coastal marshes]], is also called the Wadden Coast. In Germany the area is referred to as North Sea Coast (''Nordseeküste''). The embanked [[polder]]lands and [[saltmarsh]]es in the Wadden Sea area – including the [[Elbe Marshes]] – are referred to in Germany as North Sea coastal marshes (''Nordseemarschen'').
+More recent are terms such as Waddenland, Wadden Sea area and Wadden Sea Region. The latter term is generally understood to include all coastal regions around the Wadden Sea that participate in the trilateral cooperation between Denmark, Germany and the Netherlands. The entire area is known for its rich cultural heritage, dating back to  the Roman Iron Age and the Middle Ages, and largely coincides with the area internationally referred to as [[Frisia]].<ref>Linde Egberts and Meindert Schroor (ed.), ''Waddenland Outstanding. History, Landscape and Cultural Heritage of the Wadden Sea Region'', Amsterdam 2018.</ref> Between 2002 and 2023 stakeholder organizations and NGOs from the Wadden Sea Region cooperated in a platform or association called the Wadden Sea Forum (WSF).<ref>{{cite web |url=https://www.waddensea-forum.org/en/ |title=Wadden Sea Forum |last= |first= |date=2023 |website= |publisher=Wadden Sea Forum e.V.|access-date=22 April 2024 |quote=The Forum of the Wadden Sea Region, called Wadden Sea Forum (WSF) was an independent multi-stakeholder, multi-actor platform from Denmark, Germany and The Netherlands and contributed to an advanced and sustainable development.}}</ref>
 {{clr|left}}
 == References ==
 {{reflist}}
@@ Line 89: / Line 94: @@
 {{Wikivoyage}}
 {{Commonscat}}
+* [https://artsandculture.google.com/story/IgUR93Dm22YmeQ Wadden Sea] UNESCO Collection on Google Arts and Culture
 * {{Cite journal|title=Landscape and Cultural Heritage in the Wadden Sea Region - Project Report |author1=Vollmer, M. | author2=Guldberg, M.|author3=Maluck, M.|author4=Marrewijk, D.| author5=Schlicksbier, G.|year=2001 |journal=Wadden Sea Ecosystem |volume=12 |url=https://waddensea-worldheritage.org/sites/default/files/2001_Ecosystem12_Lancewad_0.pdf}}
 * {{cite web|url=https://ottoknot.home.xs4all.nl/werk/Sylt.html|title=History of human settlement, cultural change and interference with the marine environment|author=Knottnerus, Otto S.|year=2005}}
@@ Line 119: / Line 124: @@
 [[Category:Biosphere reserves of the Netherlands]]
 [[Category:Marginal seas of the Atlantic Ocean]]
+[[Category:European seas]]

v t e World Heritage Sites in Germany
For official site names, see each article or the List of World Heritage Sites in Germany.
Northern	ADGB Trade Union School Berlin Modernism Housing Estates Bremen Town Hall and Roland on the Marketplace Fagus Factory in Alfeld Hedeby and the Danevirke Archaeological Border Complex St. Mary's Cathedral and St. Michael's Church at Hildesheim Museumsinsel (Museum Island), Berlin Hanseatic City of Lübeck Palaces and Parks of Potsdam and Berlin Mines of Rammelsberg, Historic Town of Goslar and Upper Harz Water Management System Speicherstadt and Kontorhaus District with Chilehaus in Hamburg Historic Centres of Stralsund and Wismar
Central	Bauhaus and its Sites in Weimar, Dessau and Bernau Dessau-Wörlitz Garden Realm ~~Dresden Elbe Valley~~ (delisted in 2009) Erzgebirge/Krušnohoří Mining Region¹ Luther Memorials in Eisleben and Wittenberg Muskauer Park / Park Mużakowski² Naumburg Cathedral Collegiate Church, Castle, and Old Town of Quedlinburg Wartburg Castle Classical Weimar
Western	Aachen Cathedral Castles of Augustusburg and Falkenlust at Brühl Bergpark Wilhelmshöhe Cologne Cathedral Carolingian Westwork and Civitas Corvey Lower Germanic Limes⁶ Upper Middle Rhine Valley Roman Monuments, Cathedral of St. Peter and Church of Our Lady in Trier Speyer Cathedral ShUM cities of Speyer, Worms and Mainz Great Spa Towns of Europe⁸ Völklingen Ironworks Zollverein Coal Mine Industrial Complex in Essen
Southern	Abbey and Altenmünster of Lorsch The Architectural Work of Le Corbusier Augsburg Water Management System Town of Bamberg Caves and Ice Age Art in the Swabian Jura Mathildenhöhe Darmstadt Frontiers of the Roman Empire in Bavaria⁷ Frontiers of the Roman Empire:³ Upper Germanic & Rhaetian Limes Maulbronn Monastery Complex Margravial Opera House Monastic Island of Reichenau Old Town of Regensburg with Stadtamhof Pilgrimage Church of Wies Prehistoric pile dwellings around the Alps⁴ Würzburg Residence with the Court Gardens and Residence Square
Natural	Messel Pit Fossil Site Ancient Beech Forests⁵ Wadden Sea⁶
¹ Shared with the Czech Republic ² Shared with Poland ³ Shared with the United Kingdom ⁴ Shared with Austria, France, Italy, Slovenia and Switzerland ⁵ Shared with Albania, Austria, Belgium, Bosnia and Herzegovina, Bulgaria, Croatia, Czech Republic, France, Italy, North Macedonia, Poland, Romania, Slovakia, Slovenia, Spain, Switzerland and Ukraine ⁶ Shared with the Netherlands and Denmark ⁷ Shared with Austria and Slovakia ⁸ Shared with France, Austria, Belgium, Czechia, Italy, UK

v t e World Heritage Sites in the Netherlands
North	Colonies of Benevolence¹ Eisinga Planetarium in Franeker D.F. Wouda Steam Pumping Station Wadden Sea²	Flag of the Netherlands
East	Lower Germanic Limes³ Schokland and Surroundings
West	Beemster Polder Canals of Amsterdam Defence Line of Amsterdam Lower Germanic Limes³ Mill Network at Kinderdijk-Elshout Rietveld Schröder House Van Nelle Factory Wadden Sea²
Curaçao	Historic Area of Willemstad
¹ Shared with Belgium ² Shared locally with other region/s and with Germany and Denmark ³ Shared locally with other region/s and with Germany

v t e World Heritage Sites in the Kingdom of Denmark
Denmark	Christiansfeld Jelling Mounds, Runic Stones and Church Kronborg Castle Par force hunting landscape in North Zealand Roskilde Cathedral Stevns Klint Wadden Sea
Greenland	Ilulissat Icefjord Kujataa Greenland: Norse and Inuit Farming at the Edge of the Ice Cap Aasivissuit – Nipisat: Inuit Hunting Ground between Ice and Sea

v t e Earth's oceans and seas
Antarctic/Southern Ocean	Amundsen Sea Bellingshausen Sea Cooperation Sea Cosmonauts Sea Davis Sea D'Urville Sea King Haakon VII Sea Lazarev Sea Mawson Sea Riiser-Larsen Sea Ross Sea Scotia Sea Somov Sea Weddell Sea
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