title: [Characteristics of macrozoobenthic assemblages and their relationship with aquatic environmental factors in streams of Lake Dianchi watershed in the wet season].
abstract: The characteristics of macrozoobenthic assemblages and their relationship with aquatic environmental factors in the 29 streams of the Lake Dianchi (LD) watershed in the wet season were studied. Biosurveys of macrozoobenthic assemblages during July and August 2009, as well as 17 mensal aquatic physicochemical parameters from September 2008 to August 2009 were carried out at 29 sampling sites. The objectives were to demonstrate the characteristics of macrozoobenthic assemblages in streams of the LD watershed in the wet season, to identify the key aquatic environmental factors affecting these assemblages, and to investigate the relationship of spatial patterns between the Shannon-Weaver diversity index of the assemblages and the assessment of aquatic environmental quality. Results identified 3 divisions, 7 families, and 8 genera of macrozoobenthos, including 4 families and 5 genera of Annelida, 2 families and 2 genera of Mollusca, and 1 family and 1 genus of Arthropoda. Among these, Limnodrilus (Annelida) , a tolerant species, was the dominant genus. TN, NH4(+)-N, TP, and DO were the key aquatic environmental factors affecting the macrozoobenthic assemblages, respectively 2.03-32.00, 0.34-26.66, 0.09-3.20, and 0.10-6.80 mg/L. The spatial patterns of the Shannon-Weaver diversity index of macrozoobenthic assemblages and the assessments of aquatic environmental quality were both greatest in the streams flowing into the east LD (Luolonghe, Laoyuhe, and Nanchonghe rivers), followed by those flowing into the south LD (Yunihe, Laochaihe, Baiyuhe, Cixianghe, Dongdahe, Zhonghe and Guchenghe rivers), and least in those flowing into the north LD (Wangjiaduiqu, Xinyunlianghe, Laoyunlianghe, Wulonghe, Daguanhe, Xibahe, Chuanfanghe, Cailianhe, Jinjiahe, Panlongjiang, Daqinghe, Haihe, Liujiabaoxianghe, Xiaoqinghe, Wujiabaoxianghe, Xiabahe, Laobaoxianghe, Xinbaoxianghe, and Maliaohe rivers).
authors: College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China. caijialiang-bj@163.com
authors: Jia-Liang
authors: JL
authors: Cai
authors: Yu
authors: Y
authors: Su
authors: Hang
authors: H
authors: Wen
authors: Dong-Wei
authors: DW
authors: Wang
authors: Yi
authors: Y
authors: Huang
mesh_terms: D000818:Animals; D058448:Biota; D002681:China; D005618:Fresh Water / Q000032:analysis*; D007448:Invertebrates / Q000145:classification / Q000254:growth & development*; D011157:Population Dynamics; D045483:Rivers; D012621:Seasons; D014876:Water Pollution / Q000032:analysis*