应用生态学报2013，Vol.24Issue(6)：1715-1721,7.
三峡库区175 m蓄水对小江回水区主要经济鱼类能量来源的影响
Influence of 175-m-impoundment in Three Gorges Reservoir Area on the food web energy sources of main commercial fishes in backwater area of Xiaojiang River
摘要
Abstract
The impoundment in the Three Gorges Reservoir Area (TGRA) was first reached 175 m in 2010.To approach the influence of this impoundment on the food web energy sources of fishes in the tributaries of TRGA,an analysis was made on the food web energy sources of seven economically important fishes (Carassius auratus,Cyprinus carpio,Silurus asotus,Culter mongolicus mongolicus,Mystus macropterus,Pelteobagrus vachelli,and Pelteobagrus nitidus) in the backwater area of Xiaojiang River by using stable isotope method in combining with IsoSource Model.The results showed that before this impoundment (July 2010),microalgae were the main energy sources for the seven species.After this impoundment (December 2010),the contribution ratio of the microalgae decreased somewhat,while the relative contribution of terrestrial C4 plants had an obvious increase.Especially for crucian carp (C.auratus) and catfish (S.asotus),the contribution rate of the C4 plants reached 38-54％ and 32-50％,respectively.After the impoundment,at least 30％ of the energy resources of these two fishes were come from terrestrial C4 plants,suggesting that the impoundment in TGRA increased the contribution rate of exogenous terrestrial C4 plants as the energy sources of fishes.关键词
IsoSource模型/稳定性同位素/三峡库区/小江回水区/鱼类Key words
IsoSource model/ stable isotope/ Three Gorges Reservoir Area/ backwater area of Xiaojiang River fish.分类
农业科技引用本文复制引用
李斌,王志坚,岳兴建,王永明,金丽,张耀光..三峡库区175 m蓄水对小江回水区主要经济鱼类能量来源的影响[J].应用生态学报,2013,24(6):1715-1721,7.基金项目
国家公益性行业(农业)科研专项(200903048-08)和中国长江三峡集团公司科研项目(G-12-08-01)资助. （农业）
