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首页> 外文期刊>Trends in Ecology & Evolution >Distribution patterns of benthic macroinvertebrate communities based on multispatial-scale environmental variables in the river systems of Republic of Korea
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Distribution patterns of benthic macroinvertebrate communities based on multispatial-scale environmental variables in the river systems of Republic of Korea

机译：基于多空间级环境变量在韩国河流系统中基于多空间级环境变量的底栖大型环境变量的分布模式

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摘要

Understanding the relationship between benthic macroinvertebrates and environmental variables is the first step toward establishing sustainable freshwater ecosystems in terms of biodiversity, and this knowledge can be applied in river management. We analyzed major environmental variables that affect biotic communities on the national scale in the Republic of Korea. To achieve this goal, 2647 sampling stream sites were surveyed from 2016 to 2018 to collect benthic macroinvertebrates and measure 14 environmental variables. We identified a total of 359 taxa, belonging to 32 orders in 9 classes of 5 phyla, most of which were aquatic insects including Ephemeroptera, Odonata, Plecoptera, Coleoptera, Diptera and Trichoptera. Two-way indicator species analysis (TWINSPAN) based on biotic communities divided the sampling sites into six groups. Discriminant analysis identified gradient, streambed substrates, velocity, biological oxygen demand (BOD) and altitude as the major environmental variables that distinguished each TWINSPAN group. In addition, stream order and stream width also influenced aquatic macroinvertebrate communities, but the influence was low. The indicator taxa in each group were gradually changed from sensitive organisms preferring high altitudes, fast velocities and coarse substrates to tolerant organisms preferring low altitudes, slow velocities and fine substrates in each group from one to six. Canonical correspondence analysis confirmed that the composition of benthic macroinvertebrate communities in the Republic of Korea was dependent on stream gradient, microhabitat, organic pollution and geographical feature rather than on stream size or other water quality variables. Our study identified variables affecting the overall distribution patterns of biotic communities on a national scale and provides useful information for conservation and management of stream ecosystems in the Asian monsoon region.
机译：了解底栖大型椎骨门和环境变量之间的关系是在生物多样性方面建立可持续淡水生态系统的第一步，这知识可以应用于河流管理。我们分析了影响大韩民国的国家规模的生物社区的主要环境变量。为实现这一目标，从2016年到2018年调查了2647个采样流站点，以收集底栖椎骨门和测量14个环境变量。我们共识别出359个分类群，属于32个阶级的32个命令，其中大部分是水生昆虫，包括涩尾虫，odonata，plecoptera，鞘翅目，diptera和trichoptera。基于生物社区的双向指示器物种分析（Twinspan）将采样点分为六组。判别分析鉴定了梯度，流底板，速度，生物需氧（BOD）和高度，作为各个双胞胎群组的主要环境变量。此外，流秩序和流宽度也影响水生物的大型椎体社区，但影响力很低。每组中的指标分类群逐渐从敏感的生物体偏好，较高海拔，快速速度和粗基质，以耐受较低的生物，每组较低，慢速速度和精细基材从一到六个。规范对应分析证实，大韩民国的底栖大型近乎椎体社区的组成依赖于流梯度，微巢，有机污染和地理特征，而不是在流尺寸或其他水质变量上。我们的研究确定了在全国范围内影响生物社区的整体分布模式的变量，为亚洲季风地区的溪流生态系统进行保护和管理提供了有用的信息。

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