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首页> 外文期刊>Oryx >Impacts of anthropogenic land-use change on populations of the Endangered Patagonian cypress Fitzroya cupressoides in southern Chile: implications for its conservation
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Impacts of anthropogenic land-use change on populations of the Endangered Patagonian cypress Fitzroya cupressoides in southern Chile: implications for its conservation

机译：人为土地利用变化对智利南部濒危巴塔哥尼亚柏树Fitzroya cupressoides种群的影响：对其保护的意义

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摘要

Land-use change can have negative effects on threatened species by modifying their habitat and population dynamics. The habitat of the Endangered Patagonian cypress Fitzroya cupressoides (Mol.) Johnst. (Cupressaceae), a conifer endemic to the temperate forests of southern Chile and Argentina, has been transformed by land-use change and overexploitation. The impact of land-use change on the spatial pattern of F. cupressoides habitat from 1999 to 2011 was evaluated at the landscape level, using satellite images. Additionally, eight 20 x 25 m plots were established in four populations to assess their status. In each plot the density of F. cupressoides and the species richness of the associated plant communities were recorded and analysed, together with spatial patterns at the population and community levels. The loss of potential F. cupressoides habitat was 46% from 1999 to 2011 (38-100% for the four populations). The density of F. cupressoides was lowest in smaller habitat patches, where the number of plant species was higher and the matrix dominated by anthropogenic land-use. Land-use change was associated with a loss of potential habitat for F. cupressoides, and differences in the spatial patterns of habitat influenced the composition of remaining populations and communities. A landscape approach is recommended as a conservation planning strategy for F. cupressoides.
机译：土地利用变化可能会通过改变其栖息地和种群动态而对受威胁物种产生负面影响。濒临灭绝的巴塔哥尼亚柏树Fitzroya cupressoides（大都会）约翰斯特（Johnst）的栖息地。柏科（Cupressaceae）是智利南部和阿根廷的温带森林特有的一种针叶树，已因土地利用变化和过度开发而发生了变化。利用卫星图像，在景观水平上评估了土地利用变化对1999年至2011年F. cupressoides栖息地空间格局的影响。此外，在四个人口中建立了八个20 x 25 m的地块，以评估其状况。在每个样区中，记录并分析了F. cupressoides的密度和相关植物群落的物种丰富度，以及种群和群落水平的空间格局。从1999年到2011年，潜在的F. cupressoides生境丧失了46％（四个种群为38-100％）。在较小的生境斑块中，F。cupressoides的密度最低，那里的植物种类更多，而基质则以人为土地利用为主。土地利用的变化与F. cupressoides的潜在栖息地的丧失有关，栖息地空间格局的差异影响了其余种群和社区的组成。建议使用景观方法作为F. cupressoides的保护规划策略。

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