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首页> 外文期刊>Conservation Biology >Effects of Matrix Characteristics and Interpatch Distance on Functional Connectivity in Fragmented Temperate Rainforests
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Effects of Matrix Characteristics and Interpatch Distance on Functional Connectivity in Fragmented Temperate Rainforests

机译：零碎温带雨林的矩阵特征和插补距离对功能连通性的影响

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摘要

The connectivity of remnant patches of habitat may affect the persistence of species in fragmented landscapes. We evaluated the effects of the structural connectivity of forest patches (i.e., distance between patches) and matrix class (land-cover type) on the functional connectivity of 3 bird species (the White-crested Elaenia [Elaenia albiceps], the Green-backed Firecrown Hummingbird [Sephanoides sephaniodes], and the Austral Thrush [Turdus falklandii]). We measured functional connectivity as the rate at which each species crossed from one patch to another. We also evaluated whether greater functional connectivity translated into greater ecological connectivity (dispersal of fruit and pollen) by comparing among forest patches fruit set of a plant pollinated by hummingbirds and abundance of seedlings and adults of 2 plants with bird- and wind-dispersed seeds. Interpatch distance was strongly associated with functional connectivity, but its effect was not independent of matrix class. For one of the bird-dispersed plants, greater functional connectivity for White-crested Elaenias and Austral Thrushes (both frugivores) was associated with higher densities of this plant. The lack of a similar association for the wind-dispersed species suggests this effect is linked to the dispersal vector. The abundance of the hummingbird-pollinated species was not related to the presence of hummingbirds. Interpatch distance and matrix class affect animal movement in fragmented landscapes and may have a cascading effect on the distribution of some animal-dispersed species. On the basis of our results, we believe effort should be invested in optimizing patch configuration and modifying the matrix so as to mitigate the effects of patch isolation in fragmented landscapes.
机译：栖息地残余斑块的连通性可能影响物种在分散景观中的存留。我们评估了森林斑块的结构连通性（即斑块之间的距离）和基质类别（土地覆盖类型）对3种鸟类（绿顶白蜡梅（Elaenia albiceps），绿背的鸟）的功能连通性的影响火冠蜂鸟[Sephanoides sephaniodes]和南方鹅口疮[Turdus falklandii]）。我们将功能连通性衡量为每个物种从一个斑块过渡到另一个斑块的速率。我们还通过比较由蜂鸟授粉的植物的森林丛集和2种带有鸟和风分散种子的植物的幼苗和成年后的森林斑块之间的果蝇来评估更大的功能连通性是否转化为更大的生态连通性（水果和花粉的分散）。插片间距离与功能连接性密切相关，但其影响与矩阵类别无关。对于其中一种鸟类分散的植物，白冠毛的鹅毛和南方鹅口疮（两个节食动物）的更高的功能连通性与该植物的更高密度相关。缺乏与风散种相似的联系，表明这种效应与散布媒介有关。蜂鸟授粉物种的丰富度与蜂鸟的存在无关。斑块间的距离和基质类别影响动物在分散的景观中的活动，并可能对一些分散在动物体内的物种的分布产生连锁影响。根据我们的结果，我们认为应该投入精力来优化补丁配置和修改矩阵，以减轻零散景观中补丁隔离的影响。

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