Matrix composition mediates effects of habitat fragmentation: a modelling study
Matrix composition mediates effects of habitat fragmentation: a modelling study
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基质组成介导栖息地破碎化的影响：建模研究
作者：
Jordan Chetcuti;W. Kunin;J. Bullock
栖息地丧失对生物多样性有明显的负面影响，但不包括栖息地丧失的碎片化本身（FPS）是否会产生影响是值得商榷的。对这场争论的一个贡献可能是，许多碎片化研究倾向于使用碎片化的焦点栖息地景观和单一的截然不同的物种——贫乏的干预土地覆盖（矩阵）。基质组成如何影响 FPS 对生物多样性的影响？使用基于个体的模型研究不同矩阵配置对 FPS 和焦点栖息地生物多样性之间关系的影响。我们操纵了矩阵中土地覆盖类型的数量和质量，以及它们与焦点栖息地的相似性。极其不同的基质导致 FPS 对 α 和 γ 多样性以及 β 多样性下降的影响增强一个数量级。低 FPS 导致高伽玛多样性。 FPS 的增加导致多样性急剧下降。相比之下，具有更相似矩阵的景观在低 FPS 下具有较低的多样性，随着 FPS 的增加，多样性几乎没有下降。与数量较多的景观相比，基质类型较少会导致β多样性总体下降。 FPS 对生物多样性的影响可能会根据基质类型的数量及其与焦点栖息地的相似性而变化。我们建议破碎化研究应考虑更多种类的景观，以帮助评估 FPS 在哪些情况下不会产生负面影响，并可以更好地预测破碎化的影响。我们展示了具有多样性基质土地覆盖类型和改善基质对依赖于焦点栖息地的物种的适宜性的重要性。
Habitat loss has clear negative effects on biodiversity, but whether fragmentation per se (FPS), excluding habitat loss does is debatable. A contribution to this debate may be that many fragmentation studies tend to use landscapes of fragmented focal-habitat and a single vastly different species-poor intervening land cover (the matrix). How does matrix composition influence the effect of FPS on biodiversity?. Using an individual-based model to investigate the effect of different configurations of the matrix on the relationship between FPS and biodiversity of the focal-habitat. We manipulated the number and quality of land cover types in the matrix, and their similarity to the focal-habitat. Extremely different matrix, caused an order of magnitude stronger effect of FPS on alpha- and gamma-diversity and beta-diversity to decline. Low FPS led to high gamma-diversity. Increasing FPS caused a dramatic decline to low diversity. In contrast landscapes with a more similar matrix had lower diversity under low FPS declining little with increasing FPS. Having few matrix types caused beta-diversity to decline in general compared to landscapes with a larger numbers. The effects of FPS on biodiversity may change depending on the number of matrix types and their similarity to the focal-habitat. We recommend that fragmentation studies should consider a greater variety of landscapes to help assess in which cases FPS does not have a negative impact and allow better predictions of the impacts of fragmentation. We show the importance of having a diversity of matrix land cover types and improving the hospitability of the matrix for species dependent on the focal-habitat.
影响因子：
3.4
作者：
Fronhofer, Emanuel A.;Hovestadt, Thomas;Poethke, Hans-Joachim
通讯作者：
Poethke, Hans-Joachim
影响因子：
5.9
作者：
Fletcher, Robert J., Jr.;Didham, Raphael K.;Haddad, Nick M.
通讯作者：
Haddad, Nick M.
影响因子：
5.7
作者：
Isaac, Nick J. B.;Brotherton, Peter N. M.;Mace, Georgina M.
通讯作者：
Mace, Georgina M.