Disappearance of Breeding Semipalmated Sandpipers from Churchill, Manitoba: More than a Local Phenomenon
Abstract As late as the 1940s the Semipalmated Sandpiper (Calidris pusilla) was the most abundant sandpiper breeding at Churchill, Manitoba. By the 1960s it had undergone a sharp decline, and by the mid-1990s the local population consisted of 11 pairs in a single colony. Nesting was last documented...
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2007
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Online Access: | http://dx.doi.org/10.1093/condor/109.2.351 http://academic.oup.com/condor/article-pdf/109/2/351/29715633/condor0351.pdf |
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croxfordunivpr:10.1093/condor/109.2.351 2024-10-13T14:06:40+00:00 Disappearance of Breeding Semipalmated Sandpipers from Churchill, Manitoba: More than a Local Phenomenon Jehl, Joseph R. 2007 http://dx.doi.org/10.1093/condor/109.2.351 http://academic.oup.com/condor/article-pdf/109/2/351/29715633/condor0351.pdf en eng Oxford University Press (OUP) The Condor volume 109, issue 2, page 351-360 ISSN 0010-5422 1938-5129 journal-article 2007 croxfordunivpr https://doi.org/10.1093/condor/109.2.351 2024-09-17T04:31:58Z Abstract As late as the 1940s the Semipalmated Sandpiper (Calidris pusilla) was the most abundant sandpiper breeding at Churchill, Manitoba. By the 1960s it had undergone a sharp decline, and by the mid-1990s the local population consisted of 11 pairs in a single colony. Nesting was last documented in 2001. Declines had also become evident at several other breeding sites along the Hudson Bay coast of Manitoba and Ontario, as well as in the number of migrants detected on the Atlantic coast of Canada and the northern United States. Information on the biology of the Churchill population in 1993–2004 largely agreed with that gathered at La Pérouse Bay, Manitoba, in the 1980s: reproductive success was good and new birds continued to join the colony; however, the number of breeding attempts by individuals was low and decreasing. As there is no evidence that the decline was related to local factors (e.g., altered habitats, climate change), it is probably attributable to mortality in the nonbreeding season, which leaves fewer birds available to return north. Whether causality can be fully resolved is problematic. Monitoring migrants can reveal population trends and studies on the breeding grounds can help frame hypotheses, but both approaches are time-consuming and provide only partial answers. In such cases, restoration of declining species may be best served by fostering habitat conservation throughout a species' range. Article in Journal/Newspaper Churchill Hudson Bay Oxford University Press Canada Hudson Hudson Bay La Pérouse Bay ENVELOPE(-93.416,-93.416,58.750,58.750) The Condor 109 2 351 360 |
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Open Polar |
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Oxford University Press |
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croxfordunivpr |
language |
English |
description |
Abstract As late as the 1940s the Semipalmated Sandpiper (Calidris pusilla) was the most abundant sandpiper breeding at Churchill, Manitoba. By the 1960s it had undergone a sharp decline, and by the mid-1990s the local population consisted of 11 pairs in a single colony. Nesting was last documented in 2001. Declines had also become evident at several other breeding sites along the Hudson Bay coast of Manitoba and Ontario, as well as in the number of migrants detected on the Atlantic coast of Canada and the northern United States. Information on the biology of the Churchill population in 1993–2004 largely agreed with that gathered at La Pérouse Bay, Manitoba, in the 1980s: reproductive success was good and new birds continued to join the colony; however, the number of breeding attempts by individuals was low and decreasing. As there is no evidence that the decline was related to local factors (e.g., altered habitats, climate change), it is probably attributable to mortality in the nonbreeding season, which leaves fewer birds available to return north. Whether causality can be fully resolved is problematic. Monitoring migrants can reveal population trends and studies on the breeding grounds can help frame hypotheses, but both approaches are time-consuming and provide only partial answers. In such cases, restoration of declining species may be best served by fostering habitat conservation throughout a species' range. |
format |
Article in Journal/Newspaper |
author |
Jehl, Joseph R. |
spellingShingle |
Jehl, Joseph R. Disappearance of Breeding Semipalmated Sandpipers from Churchill, Manitoba: More than a Local Phenomenon |
author_facet |
Jehl, Joseph R. |
author_sort |
Jehl, Joseph R. |
title |
Disappearance of Breeding Semipalmated Sandpipers from Churchill, Manitoba: More than a Local Phenomenon |
title_short |
Disappearance of Breeding Semipalmated Sandpipers from Churchill, Manitoba: More than a Local Phenomenon |
title_full |
Disappearance of Breeding Semipalmated Sandpipers from Churchill, Manitoba: More than a Local Phenomenon |
title_fullStr |
Disappearance of Breeding Semipalmated Sandpipers from Churchill, Manitoba: More than a Local Phenomenon |
title_full_unstemmed |
Disappearance of Breeding Semipalmated Sandpipers from Churchill, Manitoba: More than a Local Phenomenon |
title_sort |
disappearance of breeding semipalmated sandpipers from churchill, manitoba: more than a local phenomenon |
publisher |
Oxford University Press (OUP) |
publishDate |
2007 |
url |
http://dx.doi.org/10.1093/condor/109.2.351 http://academic.oup.com/condor/article-pdf/109/2/351/29715633/condor0351.pdf |
long_lat |
ENVELOPE(-93.416,-93.416,58.750,58.750) |
geographic |
Canada Hudson Hudson Bay La Pérouse Bay |
geographic_facet |
Canada Hudson Hudson Bay La Pérouse Bay |
genre |
Churchill Hudson Bay |
genre_facet |
Churchill Hudson Bay |
op_source |
The Condor volume 109, issue 2, page 351-360 ISSN 0010-5422 1938-5129 |
op_doi |
https://doi.org/10.1093/condor/109.2.351 |
container_title |
The Condor |
container_volume |
109 |
container_issue |
2 |
container_start_page |
351 |
op_container_end_page |
360 |
_version_ |
1812812864821395456 |