2011
DOI: 10.3354/esr00341
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Estimating 30-year change in coastal old‑growth habitat for a forest-nesting seabird in British Columbia, Canada

Abstract: The marbled murrelet Brachyramphus marmoratus is an old-growth dependent species that nests in North American coastal forests. Canadian populations and occurrence data are limited; however concern over loss of nesting habitat in coastal British Columbia led to an assessment of 'threatened' by the Committee on the Status of Endangered Wildlife in Canada, and subsequent listing under the Canadian Species at Risk Act. Information on the availability and patterns of change in nesting habitat is essential for makin… Show more

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Cited by 3 publications
(3 citation statements)
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“…The contribution of reproductive success to long-term trends in abundance of Marbled Murrelets on the Pacific Coast is influenced by the combined effects of availability of suitable forest nesting habitat and the interannual variation in marine prey, both of which can vary widely among the six Conservation Regions. The Regions that had negative trends, East Vancouver Island and the South Mainland Coast, had some of the largest reductions in forest nesting habitat that occurred between 1978 and 2008 [ 24 ]. However, these trends in southern Regions may have also resulted in changes in the marine environment, as availability of marine prey is positively associated with reproductive success of murrelets [ 15 , 16 , 25 , 26 , 27 , 28 ].…”
Section: Discussionmentioning
confidence: 99%
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“…The contribution of reproductive success to long-term trends in abundance of Marbled Murrelets on the Pacific Coast is influenced by the combined effects of availability of suitable forest nesting habitat and the interannual variation in marine prey, both of which can vary widely among the six Conservation Regions. The Regions that had negative trends, East Vancouver Island and the South Mainland Coast, had some of the largest reductions in forest nesting habitat that occurred between 1978 and 2008 [ 24 ]. However, these trends in southern Regions may have also resulted in changes in the marine environment, as availability of marine prey is positively associated with reproductive success of murrelets [ 15 , 16 , 25 , 26 , 27 , 28 ].…”
Section: Discussionmentioning
confidence: 99%
“…Radar counts are positively related to amounts of old growth nesting habitats [ 6 , 13 ], so it is generally expected that changes in bird numbers heading inland would be similar to changes in amounts of nesting habitats. This association occurred at the broad spatial scale of Conservation Regions, with negative trends on the East Coast Vancouver Island and on the South Mainland Coast, where reductions in nesting habitat occurred between 1978 and 2008 [ 24 ]. Positive trends in radar counts were detected in the North Mainland Coast and Central Coast Conservation Regions, where reductions in nesting habitat have been less acute, or where habitat may have increased depending on the criteria used to define nesting habitat [ 24 ].…”
Section: Discussionmentioning
confidence: 99%
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