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Topographic path analysis for modelling dispersal and functional connectivity: Calculating topographic distances using the topoDistance r package
Methods in Ecology and Evolution ( IF 6.6 ) Pub Date : 2019-11-11 , DOI: 10.1111/2041-210x.13317
Ian J. Wang 1
Affiliation  

  1. Estimating biologically meaningful geographic distances is essential for research in disciplines ranging from landscape genetics to community ecology. Topographically correcting distances to account for the total overland distance between locations imposed by topographic relief provides one method for calculating geographic distances that account for landscape structure.
  2. Here, I present topoDistance, an r package for calculating shortest topographic distances, weighted topographic paths and topographic least cost paths (LCPs). Topographic distances are calculated by weighting the edges of a graph by the hypotenuse of the horizontal and vertical distances between raster cells and then finding the shortest total path between cells of interest. The package also includes tools for mapping topographic paths and plotting elevation profiles.
  3. Examples from a species with moderate dispersal abilities, the western fence lizard, inhabiting a topographically complex landscape, Yosemite National Park (USA), demonstrate that topographic distances can vary significantly from straight‐line distances, and topographic LCPs can trace very different routes from LCPs and shortest topographic paths.
  4. Topographic paths and distances are broadly useful for modelling geographic isolation resulting from dispersal limitation for organisms that interact with the topographic structure of a landscape during movement and dispersal.


中文翻译:

用于建模分散性和功能连通性的地形路径分析:使用topoDistance r软件包计算地形距离

  1. 估计生物学上有意义的地理距离对于从景观遗传学到社区生态学等学科的研究至关重要。地形校正距离以解决地形起伏施加的位置之间的总陆上距离,提供了一种用于计算考虑景观结构的地理距离的方法。
  2. 在这里,我介绍了topoDistance,这是一个r包,用于计算最短地形距离,加权地形路径和最小地形成本路径(LCP)。通过用栅格像元之间的水平和垂直距离的斜边对图形的边缘进行加权,然后找到目标像元之间的最短总路径,来计算地形距离。该软件包还包括用于绘制地形路径和绘制高程剖面的工具。
  3. 来自具有适度分散能力的物种西部篱笆蜥蜴的例子,居住在地形复杂的风景区,优胜美地国家公园(美国),证明了地形距离与直线距离可以有很大差异,并且地形LCP可以追踪与LCP截然不同的路线和最短的地形路径。
  4. 地形路径和距离对于建模地理隔离具有广泛的用途,该地理隔离是由于在移动和分散过程中与景观的地形结构相互作用的生物的扩散限制而产生的。
更新日期:2019-11-11
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