Publikation: Forest management affects seasonal source-sink dynamics in a territorial, group-living bird
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The persistence of wildlife populations is under threat as a consequence of human activities, which are degrading natural ecosystems. Commercial forestry is the greatest threat to biodiversity in boreal forests. Forestry practices have degraded most available habitat, threatening the persistence of natural populations. Understanding population responses is, therefore, critical for their conservation. Population viability analyses are effective tools to predict population persistence under forestry management. However, quantifying the mechanisms driving population responses is complex as population dynamics vary temporally and spatially. Metapopulation dynamics are governed by local dynamics and spatial factors, potentially mediating the impacts of forestry e.g., through dispersal. Here, we performed a seasonal, spatially explicit population viability analysis, using long-term data from a group-living territorial bird (Siberian jay, Perisoreus infaustus). We quantified the effects of forest management on metapopulation dynamics, via forest type-specific demography and spatially explicit dispersal, and how forestry impacted the stability of metapopulation dynamics. Forestry reduced metapopulation growth and stability, through negative effects on reproduction and survival. Territories in higher quality natural forest contributed more to metapopulation dynamics than managed forests, largely through demographic processes rather than dispersal. Metapopulation dynamics in managed forest were also less resilient to disturbances and consequently, may be more vulnerable to environmental change. Seasonal differences in source-sink dynamics observed in managed forest, but not natural forests, were caused by associated seasonal differences in dispersal. As shown here, capturing seasonal source-sink dynamics allows us to predict population persistence under human disturbance and to provide targeted conservation recommendations.
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LAYTON-MATTHEWS, Kate, Michael GRIESSER, Christophe F. D. COSTE, Arpat OZGUL, 2021. Forest management affects seasonal source-sink dynamics in a territorial, group-living bird. In: Oecologia. Springer. 2021, 196(2), pp. 399-412. ISSN 0029-8549. eISSN 1432-1939. Available under: doi: 10.1007/s00442-021-04935-6BibTex
@article{LaytonMatthews2021-06-01Fores-54061, year={2021}, doi={10.1007/s00442-021-04935-6}, title={Forest management affects seasonal source-sink dynamics in a territorial, group-living bird}, number={2}, volume={196}, issn={0029-8549}, journal={Oecologia}, pages={399--412}, author={Layton-Matthews, Kate and Griesser, Michael and Coste, Christophe F. D. and Ozgul, Arpat} }
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