Species diversity of edaphic mites (Acari: Oribatida) and effects of topography, soil properties and litter gradients on their qualitative and quantitative composition in 64 km2 of forest in Amazonia
Species diversity of edaphic mites (Acari: Oribatida) and effects of topography, soil properties and litter gradients on their qualitative and quantitative composition in 64 km2 of forest in Amazonia
复制标题
亚马逊流域 64 平方公里森林中土壤螨（蜱螨：Oribatida）的物种多样性以及地形、土壤性质和凋落物梯度对其定性和定量组成的影响
DOI：
10.1007/s10493-011-9451-7
复制
发表时间：
2011
影响因子：
2.2
通讯作者：
J. Souza
中科院分区：
文献类型：
--
作者：
J. D. Moraes;E. Franklin;J. W. Morais;J. Souza
甲螨的小规模空间分布在亚马逊河流域进行了调查。此外，中型和大型的研究，需要建立这些螨在检测自然环境变异的效用，并区分这种变异从人为影响。我们正在扩大知识甲螨在潮湿的高地森林保护区，并调查是否是一个标准化的和综合的协议是一个有效的方法来评估环境变量的影响，其定性和定量组成的大空间尺度内的生态保护区在亚马逊河流域中部，巴西。Berlese-Tullgren提取的样品取自分布在64 km 2上的72块250 × 6 m的地块。共有3，182只成年个体，来自82种和79种形态种，将保护区已知的物种数量从149种扩大到254种。种类最多的属为Galumna、Rostrozetes和Scheloribates，有57种为稀有种。其中以卵圆蛛Rostrozetes ovulum、Pergalumna passimputata和长毛原蛛Archegozetes longisetosus的数量最多，前两者的出现频率最高。物种数和多度与粘粒含量、坡度、pH值和凋落物量无相关性。主坐标分析表明，土壤粘粒含量、凋落物量和pH值的变化，使甲螨的质量和数量组成发生变化。标准化的协议有效地捕捉了多样性，因为我们收集了亚马逊河流域最大的甲螨物种登记册之一。此外，还综合了生物和生态数据，以了解环境变量对生物多样性和丰度的影响。
Small-scale spatial distribution of oribatid mites has been investigated in Amazonia. In addition, medium- and large-scale studies are needed to establish the utility of these mites in detecting natural environmental variability, and to distinguish this variability from anthropogenic impacts. We are expanding the knowledge about oribatid mites in a wet upland forest reserve, and investigate whether a standardized and integrated protocol is an efficient way to assess the effects of environmental variables on their qualitative and quantitative composition on a large spatial scale inside an ecological reserve in Central Amazonia, Brazil. Samples for Berlese-Tullgren extraction were taken in 72 plots of 250 × 6 m distributed over 64 km2. In total 3,182 adult individuals, from 82 species and 79 morphospecies were recorded, expanding the number of species known in the reserve from 149 to 254. Galumna, Rostrozetes and Scheloribates were the most speciose genera, and 57 species were rare. Rostrozetes ovulum, Pergalumna passimpuctata and Archegozetes longisetosus were the most abundant species, and the first two were the most frequent. Species number and abundance were not correlated with clay content, slope, pH and litter quantity. However, Principal Coordinate Analysis indicated that as the percentage of clay content, litter quantity and pH changed, the oribatid mite qualitative and quantitative composition also changed. The standardized protocol effectively captured the diversity, as we collected one of the largest registers of oribatid mites’ species for Amazonia. Moreover, biological and ecological data were integrated to capture the effects of environmental variables accounting for their diversity and abundance.