Skip to main content

Lund University Publications

LUND UNIVERSITY LIBRARIES

Changes in numbers and distribution of wintering waterbirds around Gotland 1969–2020

Nilsson, Leif LU and Hermansson, Clas (2021) In Ornis Svecica 31. p.78-93
Abstract

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... (More)

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.

(Less)
Please use this url to cite or link to this publication:
author
and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Anatidae, Baltic Sea, Ducks, Midwinter count, Population increase, Survey
in
Ornis Svecica
volume
31
pages
16 pages
publisher
Sveriges Ornitologiska Förening
external identifiers
  • scopus:85112486191
ISSN
1102-6812
DOI
10.34080/OS.V31.22254
language
English
LU publication?
yes
id
27125cf6-0e77-4199-8401-af89e3561113
date added to LUP
2021-09-17 10:06:04
date last changed
2022-04-27 03:58:47
@article{27125cf6-0e77-4199-8401-af89e3561113,
  abstract     = {{<p>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.</p>}},
  author       = {{Nilsson, Leif and Hermansson, Clas}},
  issn         = {{1102-6812}},
  keywords     = {{Anatidae; Baltic Sea; Ducks; Midwinter count; Population increase; Survey}},
  language     = {{eng}},
  pages        = {{78--93}},
  publisher    = {{Sveriges Ornitologiska Förening}},
  series       = {{Ornis Svecica}},
  title        = {{Changes in numbers and distribution of wintering waterbirds around Gotland 1969–2020}},
  url          = {{http://dx.doi.org/10.34080/OS.V31.22254}},
  doi          = {{10.34080/OS.V31.22254}},
  volume       = {{31}},
  year         = {{2021}},
}