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 the ice-break in June. Twenty-one species were observed over the years and...
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ftunivtroemsoe:oai:munin.uit.no:10037/5972 2023-05-15T15:10:03+02:00 Diversity and abundance of water birds in a subarctic lake during three decades Klemetsen, Anders Knudsen, Rune 2013 https://hdl.handle.net/10037/5972 http://dx.doi.org/0.5324/fn.v33i0.1584 eng eng NTNU Vitenskapsmuseet Fauna Norvegica 33(2013) s. 21-27 FRIDAID 1080521 http://dx.doi.org/0.5324/fn.v33i0.1584 1502-4873 https://hdl.handle.net/10037/5972 URN:NBN:no-uit_munin_5671 openAccess VDP::Mathematics and natural science: 400::Zoology and botany: 480::Zoogeography: 486 VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Zoogeografi: 486 Journal article Tidsskriftartikkel Peer reviewed 2013 ftunivtroemsoe 2021-06-25T17:53:49Z 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 the 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 the estimated minimum number of breeding pairs varying from 15 to 39 among the 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 threespine stickleback Gasterosteus aculeatus, their dominant fish prey. As predators and parasite hosts, 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 University of Tromsø: Munin Open Research Archive Arctic Norway |
institution |
Open Polar |
collection |
University of Tromsø: Munin Open Research Archive |
op_collection_id |
ftunivtroemsoe |
language |
English |
topic |
VDP::Mathematics and natural science: 400::Zoology and botany: 480::Zoogeography: 486 VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Zoogeografi: 486 |
spellingShingle |
VDP::Mathematics and natural science: 400::Zoology and botany: 480::Zoogeography: 486 VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Zoogeografi: 486 Klemetsen, Anders Knudsen, Rune Diversity and abundance of water birds in a subarctic lake during three decades |
topic_facet |
VDP::Mathematics and natural science: 400::Zoology and botany: 480::Zoogeography: 486 VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Zoogeografi: 486 |
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 the 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 the estimated minimum number of breeding pairs varying from 15 to 39 among the 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 threespine stickleback Gasterosteus aculeatus, their dominant fish prey. As predators and parasite hosts, the water birds are important links in the food web of the lake. |
format |
Article in Journal/Newspaper |
author |
Klemetsen, Anders Knudsen, Rune |
author_facet |
Klemetsen, Anders Knudsen, Rune |
author_sort |
Klemetsen, Anders |
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 |
NTNU Vitenskapsmuseet |
publishDate |
2013 |
url |
https://hdl.handle.net/10037/5972 http://dx.doi.org/0.5324/fn.v33i0.1584 |
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_relation |
Fauna Norvegica 33(2013) s. 21-27 FRIDAID 1080521 http://dx.doi.org/0.5324/fn.v33i0.1584 1502-4873 https://hdl.handle.net/10037/5972 URN:NBN:no-uit_munin_5671 |
op_rights |
openAccess |
_version_ |
1766341118685872128 |