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Movement Patterns of the Eastern Chipmunk (<i>Tamias striatus</i>) in Four Fragmented Landscapes of prince edward island, Canada

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Open Journal of Ecology 2020年第10期10卷 688-715页

作者： Sheldon B. Opps Leslie A. Cudmore Marina Silva-Opps Department of Physics University of Prince Edward Island Charlottetown Prince Edward Island Canada Office of the Vice President Academic and Research University of Prince Edward Island Charlottetown Prince Edward Island Canada Department of Biology University of Prince Edward Island Charlottetown Prince Edward Island Canada

The analysis of animal movement patterns can provide important information on animals’ responses to habitat features. In this study, the movement paths of eastern chipmunks (Tamias striatus) were examined in four landscapes, with different levels of habitat fragmentation, using either fluorescent powdering or spool-and-line tracking. Descriptions of the tree and ground vegetation communities were performed in the vicinity of the trail to obtain information on habitat use and habitat selection. Several key movement variables were calculated, including the total path length, net distance, fractal dimension, and radius of gyration. Despite statistically significant differences in some of the movement metrics between the four landscapes, the overall movement patterns were generically the same for all of chipmunk paths examined in this study. The data were compared to trends expected based on random or correlated random walks, as well as Lévy-walk models. The mean squared net displacement did not support the correlated random walk predictions, except at smaller spatial scales, but overall demonstrated Lévy-like super diffusive behaviour. Lévy-like patterns were also confirmed from the move-length distributions that demonstrated truncated-tail power-law behaviour. Although this would suggest invariance of the movement patterns at all spatial scales studied, fractal analysis revealed at least two transitions in movement patterns at scales of around 2 and 5 m. The transition point at 2 m was negatively correlated with the density of small trees, while the transition at ~5 m was positively correlated with the spatial distribution of large trees. As the habitat-preference data showed that small trees are among the least preferred habitat component, while large trees were among the most preferred habitat, chipmunks are likely to alter their movement behaviour to avoid small trees, and attracted towards large trees possibly to avoid predators. Overall, we determined th

关键词： Fluorescent Powder Spool-and-Line Fractal Radius of Gyration Lévy Walk Correlated Random Walk Small Mammals prince edward island

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爱德华王子岛

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全球变化数据学报（中英文） 2020年第3期4卷 293-294,293-294页

作者：胡珂韩念龙刘闯石瑞香海南大学政治与公共管理学院土地资源管理系海口570100 中国科学院地理科学与资源研究所北京100101

爱德华王子岛(prince edward island)位于北美洲加拿大东南部,圣劳伦斯湾(Gulf of Saint Lawrence)南部,西南面隔着诺森伯兰海峡(Northumberland Strait)与北美洲大陆相距12.67 km,东面距布雷顿角岛(Cape Breton island)51.52 km。它的具体位置为:45°56′54″N-47°03′32″N,64°24′50″W-61°58′15″W[1-3]。基于Albers投影计算的爱德华王子岛总面积5,676.45 km2,基于Lambert投影计算的岛屿海岸线长2,282.51 km(图1-2)。

关键词：爱德华王子岛 prince edward island 圣劳伦斯湾 Gulf of Saint Lawrence 加拿大数据大百科

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