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首页> 外文期刊>Current Science: A Fortnightly Journal of Research >Mammal persistence and abundance in tropical rainforest remnants in the southern Western Ghats, India
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Mammal persistence and abundance in tropical rainforest remnants in the southern Western Ghats, India

机译：印度西高止山脉南部热带雨林残留物中的哺乳动物持久性和丰度

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摘要

Occurrence and abundance of mammals were compared in five large protected rainforest patches inside the Indira Gandhi Wildlife Sanctuary and in four smaller, unprotected rainforest fragments in a plantation matrix in the Anamalai hills, southern Western Ghats using line transect distance sampling. Among the 28 mammal species found in contiguous protected rainforests, 24 persisted in unprotected fragments. For most species, population densities were similar between the two strata. Density of arboreal mammal species showed varying habitat correlates across the sites sampled; Indian giant squirrel density was negatively correlated to canopy overlap, lion-tailed macaque density negatively and Nilgiri langur positively to rainforest tree density respectively. Persistence of most mammals on private lands in a fragmented landscape may be attributed to proximity to the surrounding large tract of reserved forest areas as well as recent conservation efforts, including reduction of hunting and protection of fragments. Comparison with past estimates suggests that arboreal mammals have persisted and increased in abundance over the last decade, particularly in private fragments, possibly due to multiple factors, including the ability of the species to use matrix habitats, low hunting pressure, lack of predators and higher food availability.
机译：使用线横断面距离采样，比较了英迪拉·甘地野生动物保护区内五个受保护的大型雨林地带和西高止山脉南部阿纳马莱山人工林中四个较小的未受保护的雨林碎片的发生率和丰富度。在连续的受保护的热带雨林中发现的28种哺乳动物中，有24种持续存在于未受保护的碎片中。对于大多数物种，两个阶层之间的种群密度相似。树木类哺乳动物的密度显示，不同采样点之间的栖息地相关性各不相同。印度大松鼠密度与冠层重叠呈负相关，狮子尾猕猴密度与雨林树木密度呈负相关。大多数哺乳动物在零散的土地上的私人土地上的生存可能归因于与周围大片保留森林区的接近以及最近的保护工作，包括减少狩猎和保护碎片。与以往估计的比较表明，过去十年间，树木栖居的哺乳动物持续存在并大量增加，特别是在私人碎片中，这可能是由于多种因素造成的，包括该物种利用基质栖息地的能力，低的狩猎压力，缺乏掠食者和更高的生存能力。食物供应。

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