Abundance, population trends, and negative associations with lake water levels for six colonial waterbird species over five decades in southern Manitoba

Management of colonial waterbirds at regional, national, and continental scales requires up-to-date monitoring information on breeding locations, population sizes, and trends. The large lakes of southern Manitoba, Canada (Winnipeg, Winnipegosis, and Manitoba), and the inter-lake region host national...

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Autores principales:	Ann E. McKellar, Steven E. Simpson, Scott Wilson
Formato:	article
Lenguaje:	EN
Publicado:	Resilience Alliance 2021
Materias:	american white pelican caspian tern colonial waterbird common tern double-crested cormorant herring gull lake winnipeg population census manitoba ring-billed gull Plant culture SB1-1110 Environmental sciences GE1-350 Plant ecology QK900-989
Acceso en línea:	https://doaj.org/article/2bf8093820ec4e5fb03573306a1be8c6
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spelling	oai:doaj.org-article:2bf8093820ec4e5fb03573306a1be8c62021-11-15T16:40:14ZAbundance, population trends, and negative associations with lake water levels for six colonial waterbird species over five decades in southern Manitoba1712-6568https://doaj.org/article/2bf8093820ec4e5fb03573306a1be8c62021-06-01T00:00:00Zhttps://www.ace-eco.org/vol16/iss1/art7/https://doaj.org/toc/1712-6568Management of colonial waterbirds at regional, national, and continental scales requires up-to-date monitoring information on breeding locations, population sizes, and trends. The large lakes of southern Manitoba, Canada (Winnipeg, Winnipegosis, and Manitoba), and the inter-lake region host nationally and continentally significant populations of colonial waterbirds, but the area has been surveyed only irregularly in the past. We conducted surveys in 2017 to produce updated information on population abundance and trends for the six most abundant species breeding on the lakes: Ring-billed Gull (Larus delawarensis), Herring Gull (Larus argentatus), Caspian Tern (Hydroprogne caspia), Common Tern (Sterna hirundo), Double-crested Cormorant (Phalacrocorax auritus), and American White Pelican (Pelecanus erythrorhynchos). We also examined the relationship between lake water levels and breeding pair abundance on Lake Winnipegosis. All species but American White Pelicans showed declines in recent years, and most notably populations of Caspian Tern and Common Tern were as low as or only just above 1970s levels, respectively. Higher water levels were associated with fewer breeding pairs of colonial waterbirds. The effects of water regulation in this region on colonial waterbirds and their habitat warrants further research, as does the degree to which the species use smaller lakes spread throughout the western boreal forest for breeding, especially during high water years on the lakes in southern Manitoba.Ann E. McKellarSteven E. SimpsonScott WilsonResilience Alliancearticleamerican white pelicancaspian terncolonial waterbirdcommon terndouble-crested cormorantherring gulllake winnipegpopulation censusmanitobaring-billed gullPlant cultureSB1-1110Environmental sciencesGE1-350Plant ecologyQK900-989ENAvian Conservation and Ecology, Vol 16, Iss 1, p 7 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	american white pelican caspian tern colonial waterbird common tern double-crested cormorant herring gull lake winnipeg population census manitoba ring-billed gull Plant culture SB1-1110 Environmental sciences GE1-350 Plant ecology QK900-989
spellingShingle	american white pelican caspian tern colonial waterbird common tern double-crested cormorant herring gull lake winnipeg population census manitoba ring-billed gull Plant culture SB1-1110 Environmental sciences GE1-350 Plant ecology QK900-989 Ann E. McKellar Steven E. Simpson Scott Wilson Abundance, population trends, and negative associations with lake water levels for six colonial waterbird species over five decades in southern Manitoba
description	Management of colonial waterbirds at regional, national, and continental scales requires up-to-date monitoring information on breeding locations, population sizes, and trends. The large lakes of southern Manitoba, Canada (Winnipeg, Winnipegosis, and Manitoba), and the inter-lake region host nationally and continentally significant populations of colonial waterbirds, but the area has been surveyed only irregularly in the past. We conducted surveys in 2017 to produce updated information on population abundance and trends for the six most abundant species breeding on the lakes: Ring-billed Gull (Larus delawarensis), Herring Gull (Larus argentatus), Caspian Tern (Hydroprogne caspia), Common Tern (Sterna hirundo), Double-crested Cormorant (Phalacrocorax auritus), and American White Pelican (Pelecanus erythrorhynchos). We also examined the relationship between lake water levels and breeding pair abundance on Lake Winnipegosis. All species but American White Pelicans showed declines in recent years, and most notably populations of Caspian Tern and Common Tern were as low as or only just above 1970s levels, respectively. Higher water levels were associated with fewer breeding pairs of colonial waterbirds. The effects of water regulation in this region on colonial waterbirds and their habitat warrants further research, as does the degree to which the species use smaller lakes spread throughout the western boreal forest for breeding, especially during high water years on the lakes in southern Manitoba.
format	article
author	Ann E. McKellar Steven E. Simpson Scott Wilson
author_facet	Ann E. McKellar Steven E. Simpson Scott Wilson
author_sort	Ann E. McKellar
title	Abundance, population trends, and negative associations with lake water levels for six colonial waterbird species over five decades in southern Manitoba
title_short	Abundance, population trends, and negative associations with lake water levels for six colonial waterbird species over five decades in southern Manitoba
title_full	Abundance, population trends, and negative associations with lake water levels for six colonial waterbird species over five decades in southern Manitoba
title_fullStr	Abundance, population trends, and negative associations with lake water levels for six colonial waterbird species over five decades in southern Manitoba
title_full_unstemmed	Abundance, population trends, and negative associations with lake water levels for six colonial waterbird species over five decades in southern Manitoba
title_sort	abundance, population trends, and negative associations with lake water levels for six colonial waterbird species over five decades in southern manitoba
publisher	Resilience Alliance
publishDate	2021
url	https://doaj.org/article/2bf8093820ec4e5fb03573306a1be8c6
work_keys_str_mv	AT annemckellar abundancepopulationtrendsandnegativeassociationswithlakewaterlevelsforsixcolonialwaterbirdspeciesoverfivedecadesinsouthernmanitoba AT stevenesimpson abundancepopulationtrendsandnegativeassociationswithlakewaterlevelsforsixcolonialwaterbirdspeciesoverfivedecadesinsouthernmanitoba AT scottwilson abundancepopulationtrendsandnegativeassociationswithlakewaterlevelsforsixcolonialwaterbirdspeciesoverfivedecadesinsouthernmanitoba
_version_	1718426893471973376

Abundance, population trends, and negative associations with lake water levels for six colonial waterbird species over five decades in southern Manitoba

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