湖泊科学2012，Vol.24Issue(4)：586-592,7.
一座季节性休渔湖泊——洱海轮虫的季节动态特征
Seasonal dynamics of rotifer in a seasonal fishing moratorium lake - Lake Erhai, Yunnan Province, China
摘要
Abstract
Rotifers were sampled monthly from February to November in 2009 in Lake Erhai, Yunnan Province, China, in order to study their diversity and seasonal dynamics. Lake Erhai has a rotifer composition with tropical-subtropical characteristics: 68 species belonging to 25 genera of 17 families were identified, the majority of which were eurythermal or mesophilic. The genera of Tri-chocerca, Lecane and Brachionus were more abundant than others, accounting for 37% of the total community. Lecane arcuata and Trichocera inermis are new records in China. Biomass of the rotifer communities in Lake Erhai exhibited a bimodal seasonal cycle. An increase occurred during spring from low winter levels to an annual maximum in the mid fishing moratorium and a second increase in the early fishing season. In the mid fishing moratorium, the rotifer biomass was dominated by Asplanchna priodonla; while in the early fishing season, it was dominated by the small-sized Kemtella cochleans and Polyarthra vulgaris, then by A. prir odonta again. The seasonal fishing moratorium affected not only the predation pressure on rotifers, but also competitive pressure on rotifer through influencing the community structure of Cladocera. Through the influence of predation and competition, rotifers were dominated by large omnivorous A. pnodonta, which showed a bimodal seasonal distribution pattern.关键词
轮虫/多样性/群落结构/季节性休渔/洱海Key words
Rotifers/ diversity/ community structure/ seasonal fishing moratorium/ Lake Erhai引用本文复制引用
吴秋婷,卫志宏,朱江,孟良,吕兴菊,赵萍萍,韩博平,林秋奇..一座季节性休渔湖泊——洱海轮虫的季节动态特征[J].湖泊科学,2012,24(4):586-592,7.基金项目
教育部博士点基金新老师类项目(20094401120009)和国家水体污染控制与治理科技重大专项项目(2009ZX07105-01-001)联合资助. （20094401120009）
