期刊
CANADIAN JOURNAL OF ZOOLOGY
卷 93, 期 1, 页码 1-7出版社
CANADIAN SCIENCE PUBLISHING
DOI: 10.1139/cjz-2014-0143
关键词
landscape resistance; functional connectivity; habitat choice; habitat resistance; dispersal; amphibian; substrate; Long-toed Salamander; Ambystoma macrodactylum
类别
资金
- Natural Sciences and Engineering Research Council of Canada (NSERC)
- The University of British Columbia
- BRITE
- NSERC [311931-2005, 311931-2010]
- BC Ministry of Environment Permit [78470-25]
Understanding dispersal requires multiple lines of investigation, from the study of broad patterns of population connectivity to the identification of factors impacting movement at local scales. To determine the potential effects of different microhabitats on dispersal in the Long-toed Salamander (Ambystoma macrodactylum Baird, 1850), we experimentally evaluated mobility, moisture loss, and habitat choice in response to five common substrates (deciduous and coniferous leaf litter, grass, moss, and sand). Specifically, we examined differences in the efficiency with which salamanders moved across substrates when motivated to move. We then quantified moisture loss in each substrate and evaluated habitat preference. Our results point to a trade-off between substrates that are easily traversed and those that offer high protection against desiccation. Habitat choice appeared to balance these two aspects of performance, with salamanders favouring a substrate that offered both low resistance to movement and high protection against desiccation. This result was context-dependent, as preferences shifted towards wetter but less easily traversed substrates when supplemental cover objects were made available. Overall, our study highlights the potential for individuals to respond to a given substrate in ways that can both facilitate and limit dispersal and thus underscores the need to consider different aspects of individual performance and behaviour when studying population connectivity.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据