A review of agricultural land use by shorebirds with special reference to habitat conservation in the Fraser River Delta, British Columbia
Many estuaries worldwide are important habitats for shorebirds. Agricultural fields adjacent to food-rich intertidal areas can provide roosting and feeding habitat, particularly at high tide. The Fraser River Delta (FRD) contains rich agricultural land and is Canada’s most important non-breeding sit...
Published in: | Canadian Journal of Plant Science |
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Canadian Science Publishing
2008
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Online Access: | http://dx.doi.org/10.4141/p06-137 http://www.nrcresearchpress.com/doi/pdf/10.4141/P06-137 |
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crcansciencepubl:10.4141/p06-137 2024-09-09T19:35:03+00:00 A review of agricultural land use by shorebirds with special reference to habitat conservation in the Fraser River Delta, British Columbia Evans-Ogden, Lesley J Bittman, Shabtai Lank, David B 2008 http://dx.doi.org/10.4141/p06-137 http://www.nrcresearchpress.com/doi/pdf/10.4141/P06-137 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Plant Science volume 88, issue 1, page 71-83 ISSN 0008-4220 1918-1833 journal-article 2008 crcansciencepubl https://doi.org/10.4141/p06-137 2024-06-20T04:11:53Z Many estuaries worldwide are important habitats for shorebirds. Agricultural fields adjacent to food-rich intertidal areas can provide roosting and feeding habitat, particularly at high tide. The Fraser River Delta (FRD) contains rich agricultural land and is Canada’s most important non-breeding site for shorebirds. We review and synthesize recent studies that have investigated agricultural land as non-breeding habitat for shorebirds in the FRD using radio-tracking, day-time and night-time surveys, stable isotope analysis of blood samples, examination of prey in stomach and faecal samples, and farmer surveys regarding field management. The three primary shorebirds studied in the FRD were dunlin (Calidris alpina pacifica), black-bellied plover (Pluvialis squatarola), and killdeer (Charadrius vociferus). Field use is mainly nocturnal for dunlin, but diurnal for black-bellied plovers and killdeer. Dunlin and black-bellied plovers mainly use bare or winter cover crop fields, preferring short cover. Killdeer mainly use berry and winter vegetable fields. All species prefer fields recently manured, fertilized, or laser levelled. Day length and precipitation influenced field use. Stable isotope analysis (δ 13 C, δ 15 N) of dunlin blood indicates that approximately 38% of dunlin diet is obtained from agricultural habitat. Younger birds have a higher terrestrial contribution to diet (~43%) than adults (~35%). Dunlin prey includes agricultural pest species such as leatherjacket (Tipulidae) larvae and wireworm (Agriotes spp.). Coastal agricultural land with diverse crop types benefits shorebirds, and its loss may negatively impact fitness, especially for juveniles. Research conducted in the FRD shows the importance of farmland for wintering shorebirds and suggests conservation and management strategies to preserve and enhance the wildlife value of this agricultural habitat. Key words: Farmland, agricultural land, shorebirds, Fraser River Delta, management, wildlife conservation Article in Journal/Newspaper Calidris alpina Dunlin Canadian Science Publishing Fraser River ENVELOPE(-62.243,-62.243,56.619,56.619) Canadian Journal of Plant Science 88 1 71 83 |
institution |
Open Polar |
collection |
Canadian Science Publishing |
op_collection_id |
crcansciencepubl |
language |
English |
description |
Many estuaries worldwide are important habitats for shorebirds. Agricultural fields adjacent to food-rich intertidal areas can provide roosting and feeding habitat, particularly at high tide. The Fraser River Delta (FRD) contains rich agricultural land and is Canada’s most important non-breeding site for shorebirds. We review and synthesize recent studies that have investigated agricultural land as non-breeding habitat for shorebirds in the FRD using radio-tracking, day-time and night-time surveys, stable isotope analysis of blood samples, examination of prey in stomach and faecal samples, and farmer surveys regarding field management. The three primary shorebirds studied in the FRD were dunlin (Calidris alpina pacifica), black-bellied plover (Pluvialis squatarola), and killdeer (Charadrius vociferus). Field use is mainly nocturnal for dunlin, but diurnal for black-bellied plovers and killdeer. Dunlin and black-bellied plovers mainly use bare or winter cover crop fields, preferring short cover. Killdeer mainly use berry and winter vegetable fields. All species prefer fields recently manured, fertilized, or laser levelled. Day length and precipitation influenced field use. Stable isotope analysis (δ 13 C, δ 15 N) of dunlin blood indicates that approximately 38% of dunlin diet is obtained from agricultural habitat. Younger birds have a higher terrestrial contribution to diet (~43%) than adults (~35%). Dunlin prey includes agricultural pest species such as leatherjacket (Tipulidae) larvae and wireworm (Agriotes spp.). Coastal agricultural land with diverse crop types benefits shorebirds, and its loss may negatively impact fitness, especially for juveniles. Research conducted in the FRD shows the importance of farmland for wintering shorebirds and suggests conservation and management strategies to preserve and enhance the wildlife value of this agricultural habitat. Key words: Farmland, agricultural land, shorebirds, Fraser River Delta, management, wildlife conservation |
format |
Article in Journal/Newspaper |
author |
Evans-Ogden, Lesley J Bittman, Shabtai Lank, David B |
spellingShingle |
Evans-Ogden, Lesley J Bittman, Shabtai Lank, David B A review of agricultural land use by shorebirds with special reference to habitat conservation in the Fraser River Delta, British Columbia |
author_facet |
Evans-Ogden, Lesley J Bittman, Shabtai Lank, David B |
author_sort |
Evans-Ogden, Lesley J |
title |
A review of agricultural land use by shorebirds with special reference to habitat conservation in the Fraser River Delta, British Columbia |
title_short |
A review of agricultural land use by shorebirds with special reference to habitat conservation in the Fraser River Delta, British Columbia |
title_full |
A review of agricultural land use by shorebirds with special reference to habitat conservation in the Fraser River Delta, British Columbia |
title_fullStr |
A review of agricultural land use by shorebirds with special reference to habitat conservation in the Fraser River Delta, British Columbia |
title_full_unstemmed |
A review of agricultural land use by shorebirds with special reference to habitat conservation in the Fraser River Delta, British Columbia |
title_sort |
review of agricultural land use by shorebirds with special reference to habitat conservation in the fraser river delta, british columbia |
publisher |
Canadian Science Publishing |
publishDate |
2008 |
url |
http://dx.doi.org/10.4141/p06-137 http://www.nrcresearchpress.com/doi/pdf/10.4141/P06-137 |
long_lat |
ENVELOPE(-62.243,-62.243,56.619,56.619) |
geographic |
Fraser River |
geographic_facet |
Fraser River |
genre |
Calidris alpina Dunlin |
genre_facet |
Calidris alpina Dunlin |
op_source |
Canadian Journal of Plant Science volume 88, issue 1, page 71-83 ISSN 0008-4220 1918-1833 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.4141/p06-137 |
container_title |
Canadian Journal of Plant Science |
container_volume |
88 |
container_issue |
1 |
container_start_page |
71 |
op_container_end_page |
83 |
_version_ |
1809904463044935680 |