The matrix alters the role of path redundancy on patch colonization rates.
The matrix alters the role of path redundancy on patch colonization rates.
复制标题
该矩阵改变了路径冗余对斑块定殖率的作用。
作者：
R. Fletcher;M. Acevedo;Ellen P. Robertson
景观连通性是生态学和保护中许多问题的核心。最近，路径冗余对生物体运动的作用已经被强调用于理解连接性，因为增加潜在路径的数量（即，冗余）预计会增加移动速率，这可能会改变觅食理论和种群动态的预测。尽管如此，测试路径冗余对连通性影响的实验仍然很少。我们测试的作用路径冗余的运动的栖息地专家，Chelinidea vittiger，使用实验舞台，改变路径冗余的数量和配置的垫脚石在整个梯度的矩阵电阻。我们发现，踏脚石冗余增加了目标斑块的定殖率，但效果因冗余配置和基质结构而异。此外，矩阵效应更好地解释通过使用有效的距离措施，将冗余矩阵比那些忽略冗余。我们的研究结果提供了实验证据表明，忽略冗余的措施可能不足以捕捉功能连接，说明冗余改变殖民率的方式，并强调栖息地配置和矩阵结构如何相互作用，以引导个人在景观中的运动。
Landscape connectivity is central to many problems in ecology and conservation. Recently, the role of path redundancies on movement of organisms has been emphasized for understanding connectivity, because increasing the number of potential paths (i.e., redundancy) is predicted to increase movement rates, which can alter predictions for foraging theory and population dynamics. Nonetheless, experiments that test for the effects of path redundancies on connectivity remain scarce. We tested for the role of path redundancies on the movements of a habitat specialist, Chelinidea vittiger, using experimental arenas that altered path redundancy by varying the amount and configuration of stepping stones across a gradient of matrix resistance. We found that stepping-stone redundancies increased colonization rates to target patches, but the effects differed depending on the configuration of redundancy and the structure of the matrix. In addition, matrix effects were better explained through the use of effective distance measures that incorporate redundancy in the matrix than those that ignore redundancy. Our results provide experimental evidence that measures that ignore redundancies may be inadequate for capturing functional connectivity, illustrate the ways in which redundancies alter colonization rates, and emphasize how habitat configuration and matrix structure can interact to guide movement of individuals across landscapes.
影响因子：
6.6
作者：
Nakagawa, Shinichi;Schielzeth, Holger
通讯作者：
Schielzeth, Holger