滆湖轮虫群落结构及其与水环境因子的关系

doi:10.11870/cjlyzyyhj201706005

摘要/Abstract

摘要： 为研究滆湖轮虫群落结构特征及其与环境因子的关系，于2013年对该湖轮虫群落和相关环境因子按季度进行了调查研究。共鉴定出轮虫23属55种，富营养化指示种44种。全年优势种为：矩形龟甲轮虫、螺形龟甲轮虫、广布多肢轮虫、长肢多肢轮虫、萼花臂尾轮虫、角突臂尾轮虫、长三肢轮虫和前节晶囊轮虫。轮虫年均密度和生物量分别为1 820.0 ind./L和2.93 mg/L。季节上，秋季密度（3 555.0 ind./L）最高，春季生物量（6.31 mg/L）最高；空间上，南部密度（2 655.0 ind./L）最高，北部生物量（3.26 mg/L）最高。轮虫群落在季节上差异较大，而在空间上差异不明显。相关性分析和多元回归分析显示总氮和COD_Mn是对滆湖轮虫群落结构变化起关键性作用的非生物因子。另外，通过轮虫优势种指示种和轮虫多样性指数等参数，得出2013年滆湖营养程度为富营养水平。

关键词: 滆湖, 轮虫, 群落结构, 环境因子, 水质评价

Abstract: The community structure of rotifer and its relationship with environmental factors in Lake Gehu were investigated seasonally in 2013. The results showed that totally 55 species belonged to 23 genera were identified in this study, with 44 indicator species for pollution. Keratella quadrala, K. cochlearis, Polyarthra vulgaris, P. dolichoptera, Brachionus calyciflorus, B. angularis, Filinia longisela, and Asplanchna priodonta were the mainly dominant species during our study period. The annually average density and biomass of the rotifer were 1 820.0 ind./L and 2.93 mg/L, respectively. The total density reached the maximum in autumn (3 555.0 ind./L) and in the south part (2 655.0 ind./L), while the biomass was highest in spring (6.31 mg/L) and in the north part (3.26 mg/L). The distribution of rotifer community showed significantly difference seasonally rather than spatially. Pearson correlation analysis and multiple regression analysis indicated that COD_Mn and TN played a key role in the succession of rotifer communities. Currently, Lake Gehu presents a eutrophicated status, according to the comprehensive evaluation results of the dominant indicator species and biodiversity index of rotifer communities.

Key words: Lake Gehu, rotifer, community structure, environmental factor, water quality evaluation

中图分类号:

Q958.8

杨洋, 张玮, 潘宏博, 顾琬雯, 郝瑞娟, 熊春晖, 王丽卿. 滆湖轮虫群落结构及其与水环境因子的关系[J]. 长江流域资源与环境, 2017, 26(06): 832-840.

YANG Yang, ZHANG Wei, PAN Hong-bo, GU Wan-wen, HAO Rui-juan, XIONG Chun-hui, WANG Li-qing. COMMUNITY STRUCTURE OF ROTIFERS IN RELATION TO ENVIRONMENTAL FACTORS IN LAKE GEHU[J]. RESOURCES AND ENVIRONMENT IN THE YANGTZE BASIN, 2017, 26(06): 832-840.

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