Diversity and abundance of water birds in a subarctic lake during three decades
The numbers of divers, ducks, gulls, terns and waders in the 15 km2 oligotrophic lake Takvatn, North Norway were estimated six times during 1983-2012. Systematic mapping surveys were done by boat within the first week after ice-break in June. Twenty-one species were observed over the years and 12 we...
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ftdoajarticles:oai:doaj.org/article:29d2e69cfcff4e0fb4dce1177ea75b22 2023-05-15T15:08:34+02:00 Diversity and abundance of water birds in a subarctic lake during three decades Anders Klemetsen Rune Knudsen 2013-09-01T00:00:00Z https://doi.org/10.5324/fn.v33i0.1584 https://doaj.org/article/29d2e69cfcff4e0fb4dce1177ea75b22 EN eng Norwegian University of Science and Technology https://www.ntnu.no/ojs/index.php/fauna_norvegica/article/view/1584 https://doaj.org/toc/1502-4873 https://doaj.org/toc/1891-5396 doi:10.5324/fn.v33i0.1584 1502-4873 1891-5396 https://doaj.org/article/29d2e69cfcff4e0fb4dce1177ea75b22 Fauna Norvegica, Vol 33 (2013) water birds abundance subarctic lake food web Zoology QL1-991 article 2013 ftdoajarticles https://doi.org/10.5324/fn.v33i0.1584 2022-12-31T01:48:09Z The numbers of divers, ducks, gulls, terns and waders in the 15 km2 oligotrophic lake Takvatn, North Norway were estimated six times during 1983-2012. Systematic mapping surveys were done by boat within the first week after ice-break in June. Twenty-one species were observed over the years and 12 were regarded as breeding on the lake. Red-breasted merganser Mergus serrator was the dominant diving bird, with estimated minimum number of pairs varying from 15 to 39 among years. Black-throated diver Gavia arctica (1-3 pairs), tufted duck Aythya fuligula (2-15 pairs) and common scoter Melanitta nigra (1-5 pairs) bred regularly, while velvet scoter Melanitta fusca (1-2) and goldeneye Bucephala clangula (2-4) were found in some years and mallard Anas platyrhynchos (1 pair) and wigeon Anas penelope (1 pair) in one year. Common gull Larus canus (6-30 pairs) and arctic tern Sterna paradisaea (2-35 pairs) bred in all years. Common sandpiper Tringa hypoleucos (3-9 pairs) and redshank Tringa totanus (1-4 pairs) were regular waders. Density variations of mergansers, gulls and terns are possibly related to density variations of three-spined sticklebacks Gasterosteus aculeatus, their dominant fish prey. The water birds are important links in the food web of the lake. Article in Journal/Newspaper Arctic Arctic tern Common Sandpiper Gavia arctica Larus canus Melanitta fusca Melanitta nigra North Norway Sterna paradisaea Subarctic velvet scoter Directory of Open Access Journals: DOAJ Articles Arctic Norway Fauna norvegica 33 0 |
institution |
Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
water birds abundance subarctic lake food web Zoology QL1-991 |
spellingShingle |
water birds abundance subarctic lake food web Zoology QL1-991 Anders Klemetsen Rune Knudsen Diversity and abundance of water birds in a subarctic lake during three decades |
topic_facet |
water birds abundance subarctic lake food web Zoology QL1-991 |
description |
The numbers of divers, ducks, gulls, terns and waders in the 15 km2 oligotrophic lake Takvatn, North Norway were estimated six times during 1983-2012. Systematic mapping surveys were done by boat within the first week after ice-break in June. Twenty-one species were observed over the years and 12 were regarded as breeding on the lake. Red-breasted merganser Mergus serrator was the dominant diving bird, with estimated minimum number of pairs varying from 15 to 39 among years. Black-throated diver Gavia arctica (1-3 pairs), tufted duck Aythya fuligula (2-15 pairs) and common scoter Melanitta nigra (1-5 pairs) bred regularly, while velvet scoter Melanitta fusca (1-2) and goldeneye Bucephala clangula (2-4) were found in some years and mallard Anas platyrhynchos (1 pair) and wigeon Anas penelope (1 pair) in one year. Common gull Larus canus (6-30 pairs) and arctic tern Sterna paradisaea (2-35 pairs) bred in all years. Common sandpiper Tringa hypoleucos (3-9 pairs) and redshank Tringa totanus (1-4 pairs) were regular waders. Density variations of mergansers, gulls and terns are possibly related to density variations of three-spined sticklebacks Gasterosteus aculeatus, their dominant fish prey. The water birds are important links in the food web of the lake. |
format |
Article in Journal/Newspaper |
author |
Anders Klemetsen Rune Knudsen |
author_facet |
Anders Klemetsen Rune Knudsen |
author_sort |
Anders Klemetsen |
title |
Diversity and abundance of water birds in a subarctic lake during three decades |
title_short |
Diversity and abundance of water birds in a subarctic lake during three decades |
title_full |
Diversity and abundance of water birds in a subarctic lake during three decades |
title_fullStr |
Diversity and abundance of water birds in a subarctic lake during three decades |
title_full_unstemmed |
Diversity and abundance of water birds in a subarctic lake during three decades |
title_sort |
diversity and abundance of water birds in a subarctic lake during three decades |
publisher |
Norwegian University of Science and Technology |
publishDate |
2013 |
url |
https://doi.org/10.5324/fn.v33i0.1584 https://doaj.org/article/29d2e69cfcff4e0fb4dce1177ea75b22 |
geographic |
Arctic Norway |
geographic_facet |
Arctic Norway |
genre |
Arctic Arctic tern Common Sandpiper Gavia arctica Larus canus Melanitta fusca Melanitta nigra North Norway Sterna paradisaea Subarctic velvet scoter |
genre_facet |
Arctic Arctic tern Common Sandpiper Gavia arctica Larus canus Melanitta fusca Melanitta nigra North Norway Sterna paradisaea Subarctic velvet scoter |
op_source |
Fauna Norvegica, Vol 33 (2013) |
op_relation |
https://www.ntnu.no/ojs/index.php/fauna_norvegica/article/view/1584 https://doaj.org/toc/1502-4873 https://doaj.org/toc/1891-5396 doi:10.5324/fn.v33i0.1584 1502-4873 1891-5396 https://doaj.org/article/29d2e69cfcff4e0fb4dce1177ea75b22 |
op_doi |
https://doi.org/10.5324/fn.v33i0.1584 |
container_title |
Fauna norvegica |
container_volume |
33 |
container_issue |
0 |
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1766339904754679808 |