Förändringar i antal och utbredning av övervintrande sjöfåglar runt Gotland 1969–2020

Författare

DOI:

https://doi.org/10.34080/os.v31.22254

Nyckelord:

Östersjön, populationsökning, midvinterräkning, Anatidae, ducks, inventering

Abstract

The coastal areas of the island of Gotland in the center of the Baltic Sea is an important wintering site for waterbirds in Sweden. Gotland offers extensive areas of shallow feeding grounds and, due to its location, some open waters remain available even during harsh winters. Wintering waterbirds have been counted annually on the island since the start of the International Waterbird Census in 1967, with full coverage of all the inshore areas around the main island obtained during the years 1969–1978 and 2013–2020. Between these two periods, the mean total number of wintering waterbirds increased from 32,000 to 111,500. The most numerous species were Mallard Anas platyrhynchos, Tufted Duck Aythya fuligula, and Common Goldeneye Bucephala clangula. Some species such as Eurasian Wigeon Mareca penelope, Eurasian Teal Anas crecca, and Gadwall Mareca strepera started to winter during the second period. Marked increases were also found for Smew Mergellus albellus and Greater Scaup Aythya marila, likely related to progressively milder winters in recent years.

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Referenser

Durinck J, Skov H, Jensen FP & Pihl S. 1994. Important marine areas for wintering birds in the Baltic Sea. Report to the European Commission, EU DG XI research contract no. 2242/90-09-01. Ornis Consult, Copenhagen. 110 pp.

Högström S. 1965. Något om storleken och sammansättningen av sjöfågelbeståndet på Gotland under vintern. Fauna och Flora 60: 17–26.

Högström S. 1980. Tio års vinterräkningar av sjöfågel på Gotland 1969–1978. Bläcku 6: 61–90.

Lehikoinen A, Jaatinen K, Vähätalo AV, Clausen P, Crowe O, Deceuninck B, Hearn R, Holt CA, Hornman M, Keller V, Nilsson L, Langedoen T, Tománková I, Wahl J & Fox AD. 2013. Rapid climate driven shifts in wintering distributions of three common waterbird species. Global Change Biology 19: 2071–2081. https://doi.org/10.1111/gcb.12200 DOI: https://doi.org/10.1111/gcb.12200

Marchowski D, Ławicki Ł, Fox AD, Nielsen RD, Petersen IK, Hornman M, Nilsson L, Haas F, Wahl J, Kieckbusch J, Nehls KW, Calbrade N, Hearn R, Meissner W, Fitzgerald N, Luigujõe L, Zenatello M, Gaudard C & Koschinski S. 2020. Effectiveness of the European Natura 2000 network to sustain a specialist wintering waterbird population in the face of climate change. Scientific Reports 10: 20286. https://doi.org/10.1038/s41598-020-77153-4 DOI: https://doi.org/10.1038/s41598-020-77153-4

Nilsson L. 1975. Midwinter distribution and numbers of Swedish Anatidae. Ornis Scandinavica 6: 83–107. https://doi.org/10.2307/3676281 DOI: https://doi.org/10.2307/3676281

Nilsson L. 2008. Changes of numbers and distribution of wintering waterfowl in Sweden during forty years, 1967–2006. Ornis Svecica 18: 135–226. https://doi.org/10.34080/os.v18.21852 DOI: https://doi.org/10.34080/os.v18.21852

Nilsson L. 2012. Distribution and numbers of wintering sea ducks in Swedish offshore waters. Ornis Svecica 22: 39–60. https://doi.org/10.34080/os.v22.22595 DOI: https://doi.org/10.34080/os.v22.22595

Nilsson L. 2016a. Changes in numbers and distribution of wintering Long-tailed Ducks Clangula hyemalis in Swedish waters during the last fifty years. Ornis Svecica 26: 162–176. https://doi.org//10.34080/os.v26.21855 DOI: https://doi.org/10.34080/os.v26.21855

Nilsson L. 2016b. Survey of wintering Whooper Swans Cygnus cygnus in Sweden in January 2015, and habitat shift in 1995–2015. Ornis Svecica 26: 55–60. https://doi.org/10.34080/os.v26.22532 DOI: https://doi.org/10.34080/os.v26.22532

Nilsson L & Haas F. 2016. Distribution and numbers of wintering waterbirds in Sweden in 2015 and changes during the last fifty years. Ornis Svecica 26: 3–54. https://doi.org/10.34080/os.v26.21854 DOI: https://doi.org/10.34080/os.v26.21854

Pavón-Jordán D, Fox AD, Clausen P, Dagys M, Deceuninck B, Devos K, Hearn RD, Holt CA, Hornman M, Keller V, Langedoen T, Ławicki Ł, Lorentsen SH, Luigujõe L, Meissner W, Musil P, Nilsson L, Paquet J-Y, Stipniece A, Stroud DA, Wahl J, Zenatello M & Lehikoinen A. 2015. Climate-driven changes in winter abundance of a migratory waterbird in relation to EU protected areas. Diversity and Distributions 21: 571–582. https://doi.org/10.1111/ddi.12300 DOI: https://doi.org/10.1111/ddi.12300

Petersson M. 2007. Inventering av makrofyter i Gotlands kustvatten. Rapporter om natur och miljö 2007:6. Länsstyrelsen Gotlands län, Visby. 72 pp. Avail-able at https://bit.ly/3uJR97O.

Skov H, Heinänen S, Žydelis R, Bellebaum J, Bzoma S, Dagys M, Durinck J, Garthe S, Grishanov G, Hario M, Kieckbusch JJ, Kube J, Kuresoo A, Larsson K, Luigujoe L, Meissner W, Nehls HW, Nilsson L, Petersen IK, Mikkola Roos M, Pihl S, Sonntag N, Stock A, Stipniece A & Wahl J. 2011. Waterbird Populations and Pressures in the Baltic Sea. TemaNord 2011: 550. Nordic Council of Ministers, Copenhagen. 201 pp.

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Publicerad

2021-06-10

Referera så här

Nilsson, L., & Hermansson, C. (2021). Förändringar i antal och utbredning av övervintrande sjöfåglar runt Gotland 1969–2020. Ornis Svecica, 31, 78–93. https://doi.org/10.34080/os.v31.22254

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