Squeezed by a habitat split: Warm ocean conditions and old‐forest loss interact to reduce long‐term occupancy of a threatened seabird

Conservation Letters

Jennifer L. Fisher¹  S. Kim Nelson²  Daniel D. Roby²  Lindsay J. Adrean³  James W. Rivers³  Jennifer A. Bailey Guerrero³  Brian D. Gerber⁴  Matthew G. Betts⁵  Marie‐Sophie Garcia‐Heras⁵  Zhiqiang Yang⁶  Joseph M. Northrup⁷ 

[1] Cooperative Institute for Marine Resources Studies Oregon State University Newport Oregon;Department of Fisheries and Wildlife Oregon State University Corvallis Oregon;Department of Forest Ecosystems and Society Oregon State University Corvallis Oregon;Department of Natural Resources Science University of Rhode Island Kingston Rhode Island;Forest Biodiversity Research Network, Department of Forest Ecosystems and Society Oregon State University Corvallis Oregon;US Department of Agriculture Forest Service Rocky Mountain Research Station Ogden Utah;Wildlife Research and Monitoring Section, Ontario Ministry of Natural Resources and Forestry, and Environmental and Life Sciences Graduate Program Trent University Peterborough Ontario Canada;

关键词: endangered species;    marbled murrelet;    ocean conditions;    old forest;    seabird;    threatened;   

DOI  :  10.1111/conl.12745

来源: DOAJ

【 摘 要 】

Abstract Theory predicts that species requiring multiple habitat types simultaneously should have heightened sensitivity to anthropogenic pressures, yet tests of this prediction are especially rare. We tested whether breeding site occupancy of the threatened marbled murrelet (Brachyramphus marmoratus) was driven by the synergistic effects of nesting habitat loss in forests, and changing ocean conditions. We paired 70,700 murrelet surveys at 19,837 sites across 20 years from the Oregon Coast Range with annual data on the extent of old forest and biophysical ocean conditions. Dynamic occupancy models indicated that local murrelet colonization rates were strongly reduced during warm ocean conditions with low prey availability. Landscapes that contained more old forest and were closer to the ocean showed reduced rates of local extinction. Given predictions of accelerated ocean warming and increased global timber demand, our results suggest murrelets may continue to be imperiled by deterioration of the two habitats upon which they depend.

【 授权许可】

Unknown