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Effects of fragmentation of araucarian vine forest on small mammal communities

机译：人工藤本森林破碎化对小型哺乳动物群落的影响

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Habitat loss and fragmentation are major threats to the survival of forest-dependent fauna. We examined the abundance of small mammal species in forests, corridors, remnants of araucarian vine forest, and Araucaria cunninghamii plantations and pastures. None of the forest mammal species persisted following conversion of forest to pasture. Plantations supported lowered abundances of a subset of forest species that were mainly habitat generalists with respect to their occurrence in different floristic types of undisturbed native forest. Within plantations, an increased subcanopy cover was associated with a more forest-like small mammal assemblage. Species' responses to habitat fragmentation varied. The floristic habitat generalists were largely tolerant of habitat fragmentation, their abundance being similar in forests, corridors, and remnants, and were capable of persisting in remnants a few hectares in area. Floristic habitat specialists were vulnerable to habitat fragmentation and thus were abundant in continuous forest, were less abundant in corridors, and were generally absent from remnants. Species that avoid the corridor matrix and are therefore constrained to the corridor may be disadvantaged by the linearity of the habitat, consistent with the predictions of central-place foraging theory. Although small remnants and corridors provide habitat for some species, those that are more specialized in their use of undisturbed habitat types require the retention or reestablishment of large intact areas. [References: 58]
机译：栖息地的丧失和破碎是对依赖森林的动物生存的主要威胁。我们检查了森林，走廊，荒芜的藤本森林的残余物以及南洋杉种植园和牧场中的小型哺乳动物物种的丰富性。从森林转换为牧场后，没有森林哺乳动物物种继续存在。人工林支持降低了一部分森林物种的丰富度，这些物种主要是栖息地通才，因为它们出现在不同植物类型的原状原始森林中。在人工林内，冠层下遮盖物的增加与更像森林的小型哺乳动物组合有关。物种对生境破碎化的反应各不相同。植物区系的通才学家在很大程度上容忍了栖息地的碎片化，它们在森林，走廊和残留物中的丰度相似，并且能够在几公顷的区域中残留。植物区系专家很容易受到栖息地破碎的影响，因此在连续的森林中数量丰富，在走廊中的数量较少，并且通常没有残留物。避开走廊矩阵从而被限制在走廊上的物种可能会受到栖息地线性的不利影响，这与中心地觅食理论的预测相符。尽管少量残余物和走廊为某些物种提供了栖息地，但那些更擅长使用未受干扰的栖息地类型的物种和走廊则需要保留或重建较大的完整区域。 [参考：58]

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