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标题

渭河流域大型底栖动物多度及其影响因子研究

作者

张台凡 任朝亮 王莉 宋进喜 王珍 杨小刚

机构

西北大学城市与环境学院; 陕西省环境科学研究院

摘要

大型底栖动物多度对于河流生态环境评估具有重要意义,为研究渭河流域大型底栖动物多度及其影响因子,以渭河干流陕西段的眉县、咸阳、草滩、临潼、华县等研究点为例,进行了生物采集、野外现场实验和室内实验等。通过对河流水质的分析,结合各研究点大型底栖动物的种类及多度,分析渭河流域环境因子对大型底栖动物多度的影响。结果表明, 底栖动物在各研究点不仅个体数目不同,而且在各研究点总个体数中的比例和频度也有差异,造成这些差异的主要原因是各研究点环境因子的异质性。其中,影响底栖生物群落分布的环境因子主要有总氮、总碱度、化学需氧量、六价铬、总溶解固体、流量、水温、渗透系数等。

关键词

渭河流域;大型底栖动物;多度;环境因子

引用

张台凡 任朝亮 王莉 宋进喜 王珍 杨小刚. 渭河流域大型底栖动物多度及其影响因子研究[J]. 北京师范大学学报(自然科学版), 2015, 51(2) : 197-201

基金

国家自然科学基金资助项目(51379715,51079123);教育部新世纪优秀人才支持计划项目(NCET-11-1045);高等学校博士学科点专项科研基 金资助(20136101110001)

分类号

X174

DOI

10.16360j.cnki.jbnuns.2015.02.017

Title

Macrobenthos abundance and its influencing factors in the Weihe River

Author

ZHANG Taifan REN Chaoliang WANG Li SONG Jinxi WANG Zhen YANG Xiaogang

Affiliations

College of Urban and Environmental Science, Northwest University Shaanxi Provincial Academy of Environmental Science

Abstract

Macrobenthos abundance is a major factor to consider when assessing environmental quality of a river. To analyze macrobenthos abundance and its influencing factors, both field and laboratory experiments were done. A total of 6 macrobenthos species were collected, of which, 36.66% were chironomids, 60.69% were tubificids, 0.72% were snails, 0.73% were shrimps, 0.50% were caddisflies, 0.65% were shellfish,and 0.05% were unidentified species. Macrobenthos were collected, and in situ measurements of stream flow, water temperature and vertical hydraulic conductivity of riverbed sediments were done simultaneously at 5 research sites and 14 sampling sites along the Weihe River in Shaanxi Province. Water quality was determined in the laboratory. The type and abundance of macrobenthos were also analyzed. Data analysis was mainly done by de-trended correspondence analysis (DCA), principal component analysis (PCA), canonical correspondence analysis (CCA), and Student's t-test. It was found that abundance of chironomids was the highest in Huaxian and Lintong; abundance of snails and shrimps were the highest in Lintong; abundance of tubificids and caddisflies were the highest in Xianyang and Meixian; and abundance of shellfish was the highest in Caotan. In addition to variation in the number of macrobenthos across different research sites, their proportion and frequency of total individuals also varied, due to differences across research sites. In order to obtain more objective and reliable data, environmental factors considered in this work included both physical and chemical parameters. Quality of water in Weihe River was not a critical factor affecting macrobenthos abundance, because macrobenthos sensitivity to environmental factors were different. The main environmental factors influencing macrobenthos distribution are: total nitrogen, alkalinity, chemical oxygen demand, hexavalent chromium, total dissolved solids, stream-flow, temperature and vertical hydraulic conductivity of the riverbed sediments.

Key words

Weihe River; marobenthos; abundance; environmental factors

cite

ZHANG Taifan REN Chaoliang WANG Li SONG Jinxi WANG Zhen YANG Xiaogang. Macrobenthos abundance and its influencing factors in the Weihe River[J]. Journal of Beijing Normal University(Natural Science), 2015, 51(2) : 197-201

DOI

10.16360j.cnki.jbnuns.2015.02.017

Copyright © 2014 Journal of Beijing Normal University (Natural Science)
Designed by Mr. Sun Chumin. Email: cmsun@mail.bnu.edu.cn