COMPARISON OF COASTAL FRINGE AND INTERIOR FORESTS AS RESERVES FOR MARBLED MURRELETS ON VANCOUVER ISLAND

Much of the protected habitat available to the threatened Marbled Murrelet Brachyramphus marmoratus and other old-growth associated species in the Pacific Northwest is in narrow strips along the coast (e.g., parks and scenic fringes). Using data over two years from three watersheds on southwest Vanc...

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Bibliographic Details
Published in:The Condor (Los Angeles, Calif.) Calif.), 2000-11, Vol.102 (4), p.915-920
Main Authors: Burger, Alan E, Bahn, Volker, Tillmanns, Angeline R. M
Format: Article
Language:English
Subjects:
Agroecology
Animal, plant and microbial ecology
Applied ecology
Associated species
Biological and medical sciences
Bird nesting
Birds
Brachyramphus marmoratus
Canada, British Columbia, Vancouver I
coastal forests
Coasts
Comparative analysis
Conservation, protection and management of environment and wildlife
Forest canopy
Forest ecology
Forest habitats
Forests
Fundamental and applied biological sciences. Psychology
Habitat conservation
Habitats
Islands
Marbled Murrelet
Nature reserves
nesting
Old growth forests
Ornithology
Parks, reserves, wildlife conservation. Endangered species: population survey and restocking
Predators
Shorelines
SHORT COMMUNICATIONS
Vancouver Island
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Summary:Much of the protected habitat available to the threatened Marbled Murrelet Brachyramphus marmoratus and other old-growth associated species in the Pacific Northwest is in narrow strips along the coast (e.g., parks and scenic fringes). Using data over two years from three watersheds on southwest Vancouver Island, we show that such shoreline strip forests represent suboptimal habitat for murrelets. Murrelet detections, including circling and subcanopy behaviors, were significantly lower at 30 coastal stations (20–250 m from the shoreline edge) than at 30 interior stations (1.5–21.0 km inland). Densities of predators were significantly higher at the coastal stations. The coastal trees were of similar mean height and diameter, but they had lower structural diversity and provided fewer and less suitable (thinner epiphyte cover on large boughs) nesting platforms than trees in the interior. When possible, reserves for Marbled Murrelets should be placed in interior and not shoreline forests.
ISSN:0010-5422
1938-5129
2732-4621
DOI:10.1650/0010-5422(2000)102[0915:COCFAI]2.0.CO;2