論文

査読有り
2013年8月

Scale dependent effects in resource selection by crop-raiding Japanese macaques in Niigata Prefecture, Japan

Applied Geography
  • Shota Mochizuki
  • ,
  • Takuhiko Murakami

42
開始ページ
13
終了ページ
22
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1016/j.apgeog.2013.04.016

A resource selection function is one that yields values proportional to the probability of use of a resource unit. This quantity is influenced by the heterogeneity of landscape structures, which occurs over multiple spatial scales. To provide input into wildlife management strategies, we investigated the scale dependency and functional responses of Japanese macaques using multiple scale analysis. The multiple buffers with radii of 100, 500, 1000, 1500, 2000, and 2500m were defined as the spatial scale. Crop damage was predicted at the within-home range scale, using the Random Forests algorithm with environmental variables linked to resource selection of Japanese macaques. Sixteen environmental variables were defined, covering aspects of landscape configuration, human disturbance, topography, and adopted countermeasures. Crop damage was most accurately predicted within a buffer zone of 1000m, although radii exceeding 1000m were also highly accurate. Although the importance of variables differed among spatial extents, the functional responses for each environmental variable were independent of spatial extent. These results suggest that the limiting factors of crop damage depend on spatial extent, while functional responses in resource selection remain constant across spatial extents. We also compared a multi-scale gradient map with a typical binary map to demonstrate the uncertainty in damage predictions at different spatial scales. Our results may aid wildlife management planning, for which differences in resource selection across different spatial scales are critically important. © 2013 Elsevier Ltd.

リンク情報
DOI
https://doi.org/10.1016/j.apgeog.2013.04.016

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