HABITAT-SPECIFIC MOVEMENT PARAMETERS ESTIMATED USING MARK–RECAPTURE DATA AND A DIFFUSION MODEL
HABITAT-SPECIFIC MOVEMENT PARAMETERS ESTIMATED USING MARK–RECAPTURE DATA AND A DIFFUSION MODEL
复制标题
使用标记重捕获数据和扩散模型估算特定栖息地的运动参数
DOI：
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发表时间：
2004
期刊：
影响因子：
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通讯作者：
O. Ovaskainen
中科院分区：
文献类型：
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作者：
O. Ovaskainen
我描述了一个扩散模型，旨在定量分析的运动在异质景观。该模型是基于分类的景观到一些栖息地类型，这是假设从对方的焦点物种的运动行为方面不同。除了栖息地特定的扩散和死亡率系数，该模型占边缘介导的行为，这意味着有偏见的行为接近栖息地类型之间的边界。我用三个例子来说明这个模型。在第一个例子中，我研究了边缘介导的行为的强度和栖息地斑块的大小如何影响个体将移民到斑块的概率，个体将从斑块移民的概率，以及个体预计在斑块中度过的时间。在第二个例子中，我研究了扩散走廊如何影响个体在景观中移动的概率。在第三个例子中，我估计的运动参数的一种蝴蝶从标记重捕数据。在蝴蝶的例子中，我将景观分为栖息地斑块、其他开放区域和森林。边缘介导的行为被发现有一个非常显着的影响，蝴蝶的一般扩散模式：该模型预测，栖息地斑块内的蝴蝶密度是>100倍的蝴蝶在邻近地区的密度。
I describe a diffusion model aimed at the quantitative analysis of movement in heterogeneous landscapes. The model is based on classifying a landscape into a number of habitat types, which are assumed to differ from each other in terms of the movement behavior of the focal species. In addition to habitat-specific diffusion and mortality coef- ficients, the model accounts for edge-mediated behavior, meaning biased behavior close to boundaries between the habitat types. I illustrate the model with three examples. In the first example, I examine how the strength of edge-mediated behavior and the size of a habitat patch affect the probability that an individual will immigrate to a patch, the prob- ability that an individual will emigrate from a patch, and the time that an individual is expected to spend in a patch. In the second example, I study how a dispersal corridor affects the probability that an individual will move through a landscape. In the third example, I estimate the movement parameters for a species of butterfly from mark-recapture data. In the butterfly example, I classify the landscape into habitat patches, other open areas, and forests. Edge-mediated behavior is found to have a highly significant effect on the general dispersal pattern of the butterfly: the model predicts that the density of butterflies inside habitat patches is >100 times the density of butterflies in adjacent areas.