Changes in numbers and distribution of wintering waterbirds around Gotland 1969–2020
THE COASTAL AREAS of the island of Gotland in the center of the Baltic Sea is an important wintering site for water-birds 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 h...
Published in: | Ornis Svecica |
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Format: | Article in Journal/Newspaper |
Language: | English |
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Sveriges Ornitologiska Förening
2021
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Online Access: | https://lup.lub.lu.se/record/27125cf6-0e77-4199-8401-af89e3561113 https://doi.org/10.34080/OS.V31.22254 |
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ftulundlup:oai:lup.lub.lu.se:27125cf6-0e77-4199-8401-af89e3561113 2023-05-15T15:34:48+02:00 Changes in numbers and distribution of wintering waterbirds around Gotland 1969–2020 Nilsson, Leif Hermansson, Clas 2021 https://lup.lub.lu.se/record/27125cf6-0e77-4199-8401-af89e3561113 https://doi.org/10.34080/OS.V31.22254 eng eng Sveriges Ornitologiska Förening https://lup.lub.lu.se/record/27125cf6-0e77-4199-8401-af89e3561113 http://dx.doi.org/10.34080/OS.V31.22254 scopus:85112486191 Ornis Svecica; 31, pp 78-93 (2021) ISSN: 1102-6812 Ecology Anatidae Baltic Sea Ducks Midwinter count Population increase Survey contributiontojournal/article info:eu-repo/semantics/article text 2021 ftulundlup https://doi.org/10.34080/OS.V31.22254 2023-02-01T23:39:23Z THE COASTAL AREAS of the island of Gotland in the center of the Baltic Sea is an important wintering site for water-birds 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 counts 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. Article in Journal/Newspaper Aythya marila greater scaup Mergellus albellus smew Lund University Publications (LUP) Main Island ENVELOPE(-38.220,-38.220,-54.007,-54.007) Midwinter ENVELOPE(139.931,139.931,-66.690,-66.690) Ornis Svecica 31 |
institution |
Open Polar |
collection |
Lund University Publications (LUP) |
op_collection_id |
ftulundlup |
language |
English |
topic |
Ecology Anatidae Baltic Sea Ducks Midwinter count Population increase Survey |
spellingShingle |
Ecology Anatidae Baltic Sea Ducks Midwinter count Population increase Survey Nilsson, Leif Hermansson, Clas Changes in numbers and distribution of wintering waterbirds around Gotland 1969–2020 |
topic_facet |
Ecology Anatidae Baltic Sea Ducks Midwinter count Population increase Survey |
description |
THE COASTAL AREAS of the island of Gotland in the center of the Baltic Sea is an important wintering site for water-birds 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 counts 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. |
format |
Article in Journal/Newspaper |
author |
Nilsson, Leif Hermansson, Clas |
author_facet |
Nilsson, Leif Hermansson, Clas |
author_sort |
Nilsson, Leif |
title |
Changes in numbers and distribution of wintering waterbirds around Gotland 1969–2020 |
title_short |
Changes in numbers and distribution of wintering waterbirds around Gotland 1969–2020 |
title_full |
Changes in numbers and distribution of wintering waterbirds around Gotland 1969–2020 |
title_fullStr |
Changes in numbers and distribution of wintering waterbirds around Gotland 1969–2020 |
title_full_unstemmed |
Changes in numbers and distribution of wintering waterbirds around Gotland 1969–2020 |
title_sort |
changes in numbers and distribution of wintering waterbirds around gotland 1969–2020 |
publisher |
Sveriges Ornitologiska Förening |
publishDate |
2021 |
url |
https://lup.lub.lu.se/record/27125cf6-0e77-4199-8401-af89e3561113 https://doi.org/10.34080/OS.V31.22254 |
long_lat |
ENVELOPE(-38.220,-38.220,-54.007,-54.007) ENVELOPE(139.931,139.931,-66.690,-66.690) |
geographic |
Main Island Midwinter |
geographic_facet |
Main Island Midwinter |
genre |
Aythya marila greater scaup Mergellus albellus smew |
genre_facet |
Aythya marila greater scaup Mergellus albellus smew |
op_source |
Ornis Svecica; 31, pp 78-93 (2021) ISSN: 1102-6812 |
op_relation |
https://lup.lub.lu.se/record/27125cf6-0e77-4199-8401-af89e3561113 http://dx.doi.org/10.34080/OS.V31.22254 scopus:85112486191 |
op_doi |
https://doi.org/10.34080/OS.V31.22254 |
container_title |
Ornis Svecica |
container_volume |
31 |
_version_ |
1766365079288152064 |