Population decline in the Rustic Bunting Emberiza rustica in Norway
Since the expansion of the Rustic Bunting (Emberiza rustica) westwards in northern Europe during the 19th and 20th centuries, declines have been reported in Fennoscandia. The Norwegian population was 100-500 breeding pairs in 1994. We carried out censuses to detect Rustic Buntings in Norway during 2...
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fttsvojs:oai:journal.fi:article/133834 2023-09-05T13:19:22+02:00 Population decline in the Rustic Bunting Emberiza rustica in Norway Dale, Svein Hansen, Kjetil 2013-12-31 application/pdf https://ornisfennica.journal.fi/article/view/133834 eng eng BirdLife Finland https://ornisfennica.journal.fi/article/view/133834/82386 https://ornisfennica.journal.fi/article/view/133834 Ornis Fennica; Vol 90 Nro 4 (2013); 193–202 Ornis Fennica; Vol. 90 No. 4 (2013); 193–202 0030-5685 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article 2013 fttsvojs 2023-08-23T23:03:11Z Since the expansion of the Rustic Bunting (Emberiza rustica) westwards in northern Europe during the 19th and 20th centuries, declines have been reported in Fennoscandia. The Norwegian population was 100-500 breeding pairs in 1994. We carried out censuses to detect Rustic Buntings in Norway during 2008-12, and compared these results with previous records to evaluate recent population changes. Transect censuses made along 15 km of optimal habitat (swamp forest along rivers) yielded 18 territories during 1972-78, but in 2008 we found only 5 territories, and none since 2011. We also detected Rustic Buntings in 21 of 74 previously-occupied sites (one or more records during 1963-2007). During the study period 2008-12, we recorded Rustic Buntings in 41 sites, with a maximum of 47 territories in 2008. However, from 2008 to 2012 we detected a decline of 82% (yearly decline of 34% ± 9%; 95% CI). Local extinctions occurred in at least 31 sites. The current known population size is 13 territories in 9 sites, and the true population size may be only slightly larger. About half of all territories were associated with beaver dams, but the rate of decline during 2008-12 did not depend on dams. Extinctions could be attributed to habitat loss or change in 9/53 sites (1 logging, 1 cultivation, and 7 loss of a beaver dam). We suggest that the population decline of Norwegian Rustic Buntings is due to factors operating during migration or in wintering areas. Article in Journal/Newspaper Fennoscandia Federation of Finnish Learned Societies: Scientific Journals Online Norway |
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Open Polar |
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Federation of Finnish Learned Societies: Scientific Journals Online |
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fttsvojs |
language |
English |
description |
Since the expansion of the Rustic Bunting (Emberiza rustica) westwards in northern Europe during the 19th and 20th centuries, declines have been reported in Fennoscandia. The Norwegian population was 100-500 breeding pairs in 1994. We carried out censuses to detect Rustic Buntings in Norway during 2008-12, and compared these results with previous records to evaluate recent population changes. Transect censuses made along 15 km of optimal habitat (swamp forest along rivers) yielded 18 territories during 1972-78, but in 2008 we found only 5 territories, and none since 2011. We also detected Rustic Buntings in 21 of 74 previously-occupied sites (one or more records during 1963-2007). During the study period 2008-12, we recorded Rustic Buntings in 41 sites, with a maximum of 47 territories in 2008. However, from 2008 to 2012 we detected a decline of 82% (yearly decline of 34% ± 9%; 95% CI). Local extinctions occurred in at least 31 sites. The current known population size is 13 territories in 9 sites, and the true population size may be only slightly larger. About half of all territories were associated with beaver dams, but the rate of decline during 2008-12 did not depend on dams. Extinctions could be attributed to habitat loss or change in 9/53 sites (1 logging, 1 cultivation, and 7 loss of a beaver dam). We suggest that the population decline of Norwegian Rustic Buntings is due to factors operating during migration or in wintering areas. |
format |
Article in Journal/Newspaper |
author |
Dale, Svein Hansen, Kjetil |
spellingShingle |
Dale, Svein Hansen, Kjetil Population decline in the Rustic Bunting Emberiza rustica in Norway |
author_facet |
Dale, Svein Hansen, Kjetil |
author_sort |
Dale, Svein |
title |
Population decline in the Rustic Bunting Emberiza rustica in Norway |
title_short |
Population decline in the Rustic Bunting Emberiza rustica in Norway |
title_full |
Population decline in the Rustic Bunting Emberiza rustica in Norway |
title_fullStr |
Population decline in the Rustic Bunting Emberiza rustica in Norway |
title_full_unstemmed |
Population decline in the Rustic Bunting Emberiza rustica in Norway |
title_sort |
population decline in the rustic bunting emberiza rustica in norway |
publisher |
BirdLife Finland |
publishDate |
2013 |
url |
https://ornisfennica.journal.fi/article/view/133834 |
geographic |
Norway |
geographic_facet |
Norway |
genre |
Fennoscandia |
genre_facet |
Fennoscandia |
op_source |
Ornis Fennica; Vol 90 Nro 4 (2013); 193–202 Ornis Fennica; Vol. 90 No. 4 (2013); 193–202 0030-5685 |
op_relation |
https://ornisfennica.journal.fi/article/view/133834/82386 https://ornisfennica.journal.fi/article/view/133834 |
_version_ |
1776200159469764608 |