淮河水系淮南段椎实螺类(Lymnaeidae)生态学研究

ECOLOGICAL STUDY ON SNAILS (LYMNAEIDAE) IN HUAINAN SECTION OF THE HUAIHE RIVER

于2004年春季(4月)和秋季(9月),分别对淮河水系淮南段不同环境条件下的10个站点椎实螺类的种类和分布特征进行了调查,共鉴定出椎实螺类5种,其中萝卜螺属4种,土蜗属1种,耳萝卜螺为优势种;全流域平均密度和生物量,春季为227.7Ind./m2和175.50g/m2,秋季为100.2Ind./m2和88.85g/m2.工业污染较重的站点(D、F、I)椎实螺类的群落结构趋于简化,而流域底质生境异质性的站点(E、H)螺类种数呈现多样性.

The ecological survey of snails （ Lymnaeidae ） at 10 sampling sites in Huainan section of the Huaihe River was carfled out in Apr. and Sep. 2004. During this survey, 5 species of Lymnaeidae were identified, 4 species belonging to Radix and 1 to Galba. R. auricularia was a dominant species in spring and autumn. The average density and biomass （ wet weight） were 227.7 ind./m^2 and 175.50 g/m^2 in spring, and 100.2 ind./m^2 and 88.85 g/m^2 in autumn, respectively. The community structure of the snails was simple at heavy industrial pollution sites （ D, F, I）, but species diversity was seen at sediment heterogeneity sites （ E, H）. Fig 1, Tab 2, Ref 16