扁担塘底栖动物群落的能量流动  

Energy flow of macrozoobenthic community in a macrophytic lake,Biandant ang Lake

作　　者：闫云君[1] 梁彦龄[2] 

机构地区：[1]华中科技大学生命科学与技术学院,武汉430074 [2]中国科学院水生生物研究所,武汉430072

出　　处：《生态学报》2003年第3期527-538,共12页Acta Ecologica Sinica

基　　金：国家自然科学基金资助项目 (394 30 10 2;3960 0 19) ;湖北省自然科学基金资助项目 (2 0 0 0 J10 9)~~

摘　　要：1996年 4月至 1 997年 3月对典型草型湖泊——扁担塘大型底栖动物群落的能量流动及特性进行了研究。结果表明 ,扁担塘大型底栖动物群落的总摄食能为 2 1 1 9.5 k J· m-2· a-1 ,代谢能为 389.7k J· m-2· a-1 ,排粪能为 1 642 .1 k J·m-2·a-2 ,排泄能为 34.6k J·m-2·a-1 ,生长能 (生产量 )为 53.1 k J· m-2·a-1 ;群落的平均同化效率为 2 2 .5% ,表明 77.5%的摄食能被排泄掉 ;净生长效率为 1 1 .8% 。Energy flow of the macrozoobenthic community mainly composed of chironomids, ga stropods and oligichaetes in a macrophytic lake, Biandantang Lake (Hubei, China) was investigated by a combination of field and laboratory data from April, 1996 to March, 1997. The estimated consumption of the community was 2119.5 kJ·m -2·a -1; defecation was 1642.1 kJ·m -2·a -1; respiration 3 89.7 kJ·m -2·a -1; excretion 34.6 kJ·m -2·a -1 and pro duction 53.1 kJ·m -2·a -2. The assimilation efficiency of the commu nity was 22.5%, and 77.5% of its ingestion was defecated. The computed net gro wth efficiency was 12.0%, much lower than most reported values, which meant tha t the macrozoobenthic community in Biandantang Lake utilized food less effective ly while under a mesotrophic water environment.

关 键 词：大型底栖动物群落 能量流动 扁担塘 

分 类 号：Q178.5[生物学—水生生物学]