Details zur Publikation

Referenztyp Zeitschriften
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Creative Commons Lizenz creative commons licence
Titel (primär) Movement and seasonal energetics mediate vulnerability to disturbance in marine mammal populations
Autor Gallagher, C.A.; Grimm, V.; Kyhn, L.A.; Kinze, C.C.; Nabe-Nielsen, J.;
Journal / Serie American Naturalist
Erscheinungsjahr 2021
Department OESA;
Band/Volume 197
Heft 3
Sprache englisch;
POF III (gesamt) T11;
Keywords agent-based model; energy budget; harbor porpoise; marine mammals; anthropogenic disturbances; bioenergetics
Abstract In marine environments noise from human activities is increasing dramatically, causing animals to alter their behavior and forage less efficiently. These alterations incur energetic costs that can result in reproductive failure, death, and may ultimately influence population viability; yet the link between population dynamics and individual energetics is poorly understood. We present an energy budget model for simulating effects of acoustic disturbance on populations. It accounts for environmental variability and individual state, while incorporating realistic animal movements. Using harbor porpoises (Phocoena phocoena) as a case study, we evaluated population consequences of disturbance from seismic surveys and investigated underlying drivers of vulnerability. The framework reproduced empirical estimates of population structure and seasonal variations in energetics. The largest effects predicted for seismic surveys were in late summer and fall, and were unrelated to local abundance, but instead to lactation costs, water temperature, and body fat. Our results demonstrate that consideration of temporal variation in individual energetics and their link to costs associated with disturbances is imperative when predicting disturbance impacts. These mechanisms are general to animal species, and the framework presented here can be used for gaining new insights into the spatiotemporal variability of animal movements and energetics that control population dynamics.
ID 23946
dauerhafte UFZ-Verlinkung
Gallagher, C.A., Grimm, V., Kyhn, L.A., Kinze, C.C., Nabe-Nielsen, J. (2021):
Movement and seasonal energetics mediate vulnerability to disturbance in marine mammal populations
Am. Nat. 197 (3), 296 - 311