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期刊论文 1

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2008 1

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Effect of streambed substrate on macroinvertebrate biodiversity

DUAN Xuehua, WANG Zhaoyin, TIAN Shimin

《环境科学与工程前沿（英文）》 2008年 第2卷 第1期   页码 122-128 doi: 10.1007/s11783-008-0023-y

摘要： Macroinvertebrates are important components of stream ecosystems, and are often used as indicator species for the assessment of river ecology. Numerous studies have shown that substrate is the primary physical environmental variable affecting the taxa richness and density of macroinvertebrates. The aim of this work is to study the effects of the characteristics of streambed substrate, such as grain size, shape, and roughness, on the composition and biodiversity of macroinvertebrates. A field experiment was done on the Juma River, a second-order mountain stream in northern China. Substrata of cobbles, hewn stones, pebbles, coarse sand, and fine sand were used to replace the original gravel and sand bed in a stretch of 30 m in length. The sampling results indicated that the macroinvertebrate assemblage is significantly affected by the grain size, porosity and interstitial dimension of the substrate, while it is rarely affected by the shape and the surface roughness of the experimental substrata. Macroinvertebrate compositions in cobbles and hewn stones were stable and changed least over time. The taxa richness and density of individuals in the substrata of cobbles, hewn stones, and pebbles are much higher than in those of the coarse sand and fine sand.

关键词： Substrata     physical environmental     indicator     ecology     substrate    

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Effect of streambed substrate on macroinvertebrate biodiversity

DUAN Xuehua, WANG Zhaoyin, TIAN Shimin

期刊论文