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淡水双壳类是淡水生物群落的重要组成部分,在河流等生态系统中有重要功能。2010年11月至2011年2月对江西赣江中下游淡水双壳类的种类、分布及丰度进行了调查,共采集到双壳类34种及亚种,隶属3科14属。中游双壳类有8种,优势种为圆顶珠蚌和河蚬;下游干流有34种,优势种为圆顶珠蚌、河蚬、洞穴丽蚌和中国尖嵴蚌。赣江中游、下游干流双壳类的平均密度和生物量分别为6.4±9.1ind./m2、21.0±25.4g/m2,26.7±44.1ind./m2、212.3±314.8g/m2。从赣江中游到下游干流双壳类物种多样性、密度和生物量均呈现增加的趋势。
Freshwater bivalves are an important part of freshwater biomes and have important functions in ecosystems such as rivers. From November 2010 to February 2011, the species, distribution and abundance of freshwater bivalves in the middle and lower reaches of Ganjiang River in Jiangxi Province were investigated. 34 species of bivalves and subspecies were collected, belonging to 14 families of 3 families. There are 8 species of bivalves in the middle reaches, and the dominant species are dome-shaped mussels and heliotrope. Among them, there are 34 species in the lower reaches, and the dominant species are dome-shaped mussels, heliotrope, cave mussels and Chinese spine clam. The mean density and biomass of the bivalves in the middle and downstream of the Ganjiang River were 6.4 ± 9.1ind. / M2, 21.0 ± 25.4g / m2, 26.7 ± 44.1ind. / M2, 212.3 ± 314.8g / m2, respectively. The species diversity, density and biomass of bivalves from the middle reaches to the lower reaches of the Ganjiang River show an increasing trend.