Home Range Size and Resource Use of Breeding and Non-breeding White Storks Along a Land Use Gradient
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Biotelemetry is increasingly used to study animal movement at high spatial and temporal resolution and guide conservation and resource management. Yet, limited sample sizes and variation in space and habitat use across regions and life stages may compromise robustness of behavioral analyses and subsequent conservation plans. Here, we assessed variation in (i) home range sizes, (ii) home range selection, and (iii) fine-scale resource selection of white storks across breeding status and regions and test model transferability. Three study areas were chosen within the Central German breeding grounds ranging from agricultural to fluvial and marshland. We monitored GPS-locations of 62 adult white storks equipped with solar-charged GPS/3D-acceleration (ACC) transmitters in 2013–2014. Home range sizes were estimated using minimum convex polygons. Generalized linear mixed models were used to assess home range selection and fine-scale resource selection by relating the home ranges and foraging sites to Corine habitat variables and normalized difference vegetation index in a presence/pseudo-absence design. We found strong variation in home range sizes across breeding stages with significantly larger home ranges in non-breeding compared to breeding white storks, but no variation between regions. Home range selection models had high explanatory power and well predicted overall density of Central German white stork breeding pairs. Also, they showed good transferability across regions and breeding status although variable importance varied considerably. Fine-scale resource selection models showed low explanatory power. Resource preferences differed both across breeding status and across regions, and model transferability was poor. Our results indicate that habitat selection of wild animals may vary considerably within and between populations, and is highly scale dependent. Thereby, home range scale analyses show higher robustness whereas fine-scale resource selection is not easily predictable......
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ZURELL, Damaris, Henrik VON WEHRDEN, Shay ROTICS, Michael KAATZ, Helge GROSS, Lena SCHLAG, Merlin SCHÄFER, Nir SAPIR, Sondra TURJEMAN, Martin WIKELSKI, 2018. Home Range Size and Resource Use of Breeding and Non-breeding White Storks Along a Land Use Gradient. In: Frontiers in Ecology and Evolution. 2018, 6, 79. eISSN 2296-701X. Available under: doi: 10.3389/fevo.2018.00079BibTex
@article{Zurell2018Range-43016, year={2018}, doi={10.3389/fevo.2018.00079}, title={Home Range Size and Resource Use of Breeding and Non-breeding White Storks Along a Land Use Gradient}, volume={6}, journal={Frontiers in Ecology and Evolution}, author={Zurell, Damaris and von Wehrden, Henrik and Rotics, Shay and Kaatz, Michael and Groß, Helge and Schlag, Lena and Schäfer, Merlin and Sapir, Nir and Turjeman, Sondra and Wikelski, Martin}, note={Article Number: 79} }
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