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Variation in species richness, composition and herpetological community structure across a tropical habitat gradient of Palawan Island, Philippines
Herpetozoa ( IF 0.9 ) Pub Date : 2020-05-22 , DOI: 10.3897/herpetozoa.33.e47293
Christian E. Supsup , Augusto A. Asis , Uldarico V. Carestia Jr , Arvin C. Diesmos , Neil Aldrin D. Mallari , Rafe M. Brown

Information on species richness and community structure is invaluable for guiding conservation and management of biodiversity, but is rarely available in the megadiverse biodiversity conservation hotspot of Philippines – particularly for amphibians and reptiles. This study provides the first report and characterisation of amphibians and reptile communities across primary habitat types of the Victoria-Anepahan Mountain Range on Palawan Island along the western edge of the archipelago. A total of 41 amphibian and reptile species were recorded throughout our sampling sites (n = 27 species) or in targeted habitat searches (14 species). A species richness estimator predicted that 35 species may be present in our sampling sites, suggesting that a significant proportion of secretive species may continue to be unrecorded, especially for reptiles. Higher species richness was found in secondary growth than in mixed-use agricultural areas or even pristine forest. The low species richness recorded from pristine forest types may be due to these forests now being restricted to higher elevations where species diversity has been documented to decrease. Our results also show that complex community structures (species assemblages) are to be equally expected in both secondary growth and pristine forests. Together, our results show how species richness and community assemblages may vary across habitats, highlighting that old growth forest does not always support higher species richness, particularly in high elevations.

中文翻译:

菲律宾巴拉望岛热带栖息地梯度上物种丰富度,组成和爬虫群落结构的变化

关于物种丰富度和社区结构的信息对于指导生物多样性的保护和管理是无价的,但是在菲律宾的大范围生物多样性保护热点(尤其是两栖动物和爬行动物)中很少获得。这项研究首次报告和描述了群岛西部边缘巴拉望岛的维多利亚-安纳帕罕山脉主要生境类型中的两栖动物和爬行动物群落。在我们的采样地点(n = 27种)或针对性的栖息地搜索(14种)中总共记录了41种两栖和爬行动物物种。物种丰富度估算器预测,我们的采样点可能存在35个物种,这表明很大比例的分泌物种可能仍未记录,尤其是对于爬行动物。在次生生长中发现的物种丰富度高于混合用途农业地区甚至原始森林。原始森林类型记录的物种丰富度低可能是由于这些森林现在被限制在较高的海拔,在海拔较高的地方已经记录了物种多样性下降的情况。我们的研究结果还表明,在次生林和原始森林中,复杂的群落结构(物种集合)也同样可望。总之,我们的结果表明物种丰富度和群落组成在不同生境之间可能如何变化,突显了老生长林并不总是支持更高的物种丰富度,尤其是在高海拔地区。原始森林类型记录的物种丰富度低可能是由于这些森林现在被限制在较高的海拔,在海拔较高的地方已经记录了物种多样性下降的情况。我们的研究结果还表明,在次生林和原始森林中,复杂的群落结构(物种集合)也同样可望。总之,我们的结果表明物种丰富度和群落组成在不同生境之间可能如何变化,突显了老生长林并不总是支持更高的物种丰富度,尤其是在高海拔地区。原始森林类型记录的物种丰富度低可能是由于这些森林现在被限制在较高的海拔,在海拔较高的地方已经记录了物种多样性下降的情况。我们的研究结果还表明,在次生林和原始森林中,复杂的群落结构(物种集合)也同样可望。总之,我们的结果表明物种丰富度和群落组成在不同生境之间可能如何变化,突显了老生长林并不总是支持更高的物种丰富度,尤其是在高海拔地区。
更新日期:2020-07-24
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