CAJ | 학술논문

长江口径流在南北支分布不均导致北支盐度高于南支，因此南北支之间生物群落存在一定差异。2010年在长江口分支前的江段和南北支设置5个断面，开展轮虫生态研究。分支前的太海汽渡断面处共采集到轮虫9种，隶属6科8属，其中优势种为没尾无柄轮虫、暗小异尾轮虫、萼花臂尾轮虫等；长江口南支2个断面共采集轮虫20种，隶属于6科12属，南支优势种为暗小异尾轮虫、盘状鞍甲轮虫和蹄形腔轮虫；长江口北支2个断面共采集轮虫11种，隶属于7科10属，北支优势种为舞跃无柄轮虫、没尾无柄轮虫和盘状鞍甲轮虫。南支轮虫种类、密度、多样性都高于北支，南北支的轮虫群落相似度较低。轮虫与水域环境因子相关性分析显示，盐度的差别影响了轮虫种类组成、密度和空间分布。
장강구경류재남북지분포불균도치북지염도고우남지，인차남북지지간생물군락존재일정차이。2010년재장강구분지전적강단화남북지설치5개단면，개전륜충생태연구。분지전적태해기도단면처공채집도륜충9충，대속6과8속，기중우세충위몰미무병륜충、암소이미륜충、악화비미륜충등；장강구남지2개단면공채집륜충20충，대속우6과12속，남지우세충위암소이미륜충、반상안갑륜충화제형강륜충；장강구북지2개단면공채집륜충11충，대속우7과10속，북지우세충위무약무병륜충、몰미무병륜충화반상안갑륜충。남지륜충충류、밀도、다양성도고우북지，남북지적륜충군락상사도교저。륜충여수역배경인자상관성분석현시，염도적차별영향료륜충충류조성、밀도화공간분포。
The distribution of runoff at the Yangtze River estuary is uneven , the runoff in the south branch is more than in the north , and the north salinity is greater than the south , so there is some difference in biological community between the south and north branches .We collected rotifers from five cross-sections in the south and north branches and investigated the rotifer biology. A total of9 species were i-dentified at the Taihaiqidu cross-section, belonging to 8 genera, 6 families, and the dominant species were Ascomorpha ecaudis, Tricho-cerca pusilla, Brachionus calyciflorus, et al.20 rotifer species were identified in the south branch , belonging to 12 genera, 6 families, and the dominant species of the south branch T.pusilla, L.patella, Lecane ungulata;11 rotifer species were identified in the south branch, belonging to 10 genera, 7 families, and the dominant species of the north branches were A.saltans, A.ecaudis, L.patella.We compared the component and structure of rotifer in the south and the north branches , and found that the species , density, diversity of the south was higher than those of the north , similarity of rotifers in the south and north branches was low .The different water environment of the two branches caused the difference of rotifer community structure , correlation between rotifers and water environment factors was ana-lyzed by relativity analysis among which salinity was the important factor , and difference of salinity determined the difference in species , density, and spatial-distribution of rotifer.