Gyrfalcon Falco rusticoluspost‐glacial colonization and extreme long‐term use of nest‐sites in Greenland
Gyrfalcons Falco rusticolus use the same nest‐sites over long periods of time, and in the cold dry climate of Greenland, guano and other nest debris decay slowly. Nineteen guano samples and three feathers were collected from 13 Gyrfalcon nests with stratified faecal accumulation in central‐west and...
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crwiley:10.1111/j.1474-919x.2009.00939.x 2024-09-15T18:05:29+00:00 Gyrfalcon Falco rusticoluspost‐glacial colonization and extreme long‐term use of nest‐sites in Greenland BURNHAM, KURT K. BURNHAM, WILLIAM A. NEWTON, IAN 2009 http://dx.doi.org/10.1111/j.1474-919x.2009.00939.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1474-919X.2009.00939.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1474-919X.2009.00939.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Ibis volume 151, issue 3, page 514-522 ISSN 0019-1019 1474-919X journal-article 2009 crwiley https://doi.org/10.1111/j.1474-919x.2009.00939.x 2024-07-18T04:25:48Z Gyrfalcons Falco rusticolus use the same nest‐sites over long periods of time, and in the cold dry climate of Greenland, guano and other nest debris decay slowly. Nineteen guano samples and three feathers were collected from 13 Gyrfalcon nests with stratified faecal accumulation in central‐west and northwest Greenland. Samples were 14 C dated, with the oldest guano sample dating to c . 2740–2360 calendar years (cal yr) before present (BP) and three others were probably > 1000 cal yr BP. Feather samples ranged from 670 to 60 cal yr BP. Although the estimated age of material was correlated with sample depth, both sample depth and guano thickness gave a much less reliable prediction of sample age than use of radiocarbon dating on which the margin of error was less. Older samples were obtained from sites farther from the current Greenland Ice Sheet and at higher elevations, while younger samples were closer to the current ice sheet and at lower elevations. Values for δ 13 C showed that Gyrfalcons nesting farther from the Greenland Ice Sheet had a more marine diet, whereas those nesting closer to the ice sheet (= further inland) fed on a more terrestrial diet. The duration of nest‐site use by Gyrfalcons is a probable indicator of both the time at which colonization occurred and the palaeoenvironmental conditions and patterns of glacial retreat. Nowhere before has such extreme long‐term to present use of raptor nest‐sites been documented. Article in Journal/Newspaper Falco rusticolus Greenland gyrfalcon Ice Sheet Wiley Online Library Ibis 151 3 514 522 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Gyrfalcons Falco rusticolus use the same nest‐sites over long periods of time, and in the cold dry climate of Greenland, guano and other nest debris decay slowly. Nineteen guano samples and three feathers were collected from 13 Gyrfalcon nests with stratified faecal accumulation in central‐west and northwest Greenland. Samples were 14 C dated, with the oldest guano sample dating to c . 2740–2360 calendar years (cal yr) before present (BP) and three others were probably > 1000 cal yr BP. Feather samples ranged from 670 to 60 cal yr BP. Although the estimated age of material was correlated with sample depth, both sample depth and guano thickness gave a much less reliable prediction of sample age than use of radiocarbon dating on which the margin of error was less. Older samples were obtained from sites farther from the current Greenland Ice Sheet and at higher elevations, while younger samples were closer to the current ice sheet and at lower elevations. Values for δ 13 C showed that Gyrfalcons nesting farther from the Greenland Ice Sheet had a more marine diet, whereas those nesting closer to the ice sheet (= further inland) fed on a more terrestrial diet. The duration of nest‐site use by Gyrfalcons is a probable indicator of both the time at which colonization occurred and the palaeoenvironmental conditions and patterns of glacial retreat. Nowhere before has such extreme long‐term to present use of raptor nest‐sites been documented. |
format |
Article in Journal/Newspaper |
author |
BURNHAM, KURT K. BURNHAM, WILLIAM A. NEWTON, IAN |
spellingShingle |
BURNHAM, KURT K. BURNHAM, WILLIAM A. NEWTON, IAN Gyrfalcon Falco rusticoluspost‐glacial colonization and extreme long‐term use of nest‐sites in Greenland |
author_facet |
BURNHAM, KURT K. BURNHAM, WILLIAM A. NEWTON, IAN |
author_sort |
BURNHAM, KURT K. |
title |
Gyrfalcon Falco rusticoluspost‐glacial colonization and extreme long‐term use of nest‐sites in Greenland |
title_short |
Gyrfalcon Falco rusticoluspost‐glacial colonization and extreme long‐term use of nest‐sites in Greenland |
title_full |
Gyrfalcon Falco rusticoluspost‐glacial colonization and extreme long‐term use of nest‐sites in Greenland |
title_fullStr |
Gyrfalcon Falco rusticoluspost‐glacial colonization and extreme long‐term use of nest‐sites in Greenland |
title_full_unstemmed |
Gyrfalcon Falco rusticoluspost‐glacial colonization and extreme long‐term use of nest‐sites in Greenland |
title_sort |
gyrfalcon falco rusticoluspost‐glacial colonization and extreme long‐term use of nest‐sites in greenland |
publisher |
Wiley |
publishDate |
2009 |
url |
http://dx.doi.org/10.1111/j.1474-919x.2009.00939.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1474-919X.2009.00939.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1474-919X.2009.00939.x |
genre |
Falco rusticolus Greenland gyrfalcon Ice Sheet |
genre_facet |
Falco rusticolus Greenland gyrfalcon Ice Sheet |
op_source |
Ibis volume 151, issue 3, page 514-522 ISSN 0019-1019 1474-919X |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1474-919x.2009.00939.x |
container_title |
Ibis |
container_volume |
151 |
container_issue |
3 |
container_start_page |
514 |
op_container_end_page |
522 |
_version_ |
1810443030966042624 |