湘江株洲段软体动物的调查研究

于2005年9月～12月对湘江株洲江段的软体动物进行了系统的调查.经分类鉴定,计有软体动物8科20属44种,其中腹足纲5科10属22种,双壳纲3科10属22种.腹足纲以田螺科为主,双壳纲以蚌科为主.其区系成分,东洋界与古北界相互渗透,但以东洋界华中区的种类优势明显.沿江城镇适量生活污水排入江中,可以适当增加软体动物的种类和数量;大量生活污水和工业废水未经处理排入江中,使其种类和数量显著减少.株洲航电枢纽建成蓄水,对库区的软体动物冲击较大,由于水位抬高,环境骤变,其种类和种群数量明显减少,尤其是双壳类.

Investigation and Study of Molluscs in the Zhuzhou Reaches of Xiang River

A systematic investigation of mollusk is made in the Zhuzhou Reach of Xiang River from September to December in the year of 2005.The results of classification identification show that there are 8 families,20 genera and 44 species of mollusk,including 22 species,10 genera,5 families of Gastropoda and 22 species,10 genera,3 families of Bivalvea.Gastropoda are mainly Viviparidae family and Bivalvia Unionidae family.The ingredients of district penetrate mutually between Palaearctic and Oviental,but the central China area of Palaearctic profession is of obvious advantages.The cities along the river drain off an appropriate amount of sewage into the river,making the species and quantity of the mollusk increase appropriately.On the other hand,a great deal of sewage and industrial effluent is also drained off into the river without being dealt with,which make the species and amount of the mollusk decrease greatly.Zhuzhou route electricity hub is set up to store water.It has a great impact on the mollusk in the reservoir.Because of the rising of the water level and the environmental upheaval,the species and the quantity of the mollusk reduce significantly,especially the Bivalvia.