水生态学杂志Issue(5)：15-21,7.DOI:10.15928/j.1674-3075.2015.05.003
广西会仙湿地农田沟渠鱼类群聚差异研究
Fish Assemblage in Different Types of Irrigation Ditches in Huixian Wetland,Guangxi Province
摘要
Abstract
Farmland irrigation ditches constitute a special kind of wetland system.The plant diversity in different types of irrigation ditches varies.The high plant diversity of different types of irrigation ditches provides good habi-tat and shelter for fish and increases the biodiversity of farmland ecosystems.Huixian wetland,surrounded by farm-land with irrigation ditches,is a low altitude karst wetland in the largest karst region of China.In recent years many irrigation ditches have been lined with concrete to conserve water.To date,no research has been reported on the effect of covering the irrigation ditches (streambed substrate)on fish deversity.In this study,fish community di-versity was investigated in different types of farmland ditches in June and July (summer)and September and Octo-ber (autumn)of 2014.Twenty sampling sites were selected in three types of farmland ditch:(A)unconstructed banks and natural stream bed;(B)half constructed bank and natural stream bed;(C)constructed banks and stream bed.Electroshocking and dip nets were used to collect fish samples that were taken to the lab for counting and measurement of body length and mass.Physicochemical parameters at sampling sites were measured in situ,in-cluding water temperature,dissolved oxygen,pH,conductivity and turbidity.A total of 1 388 individuals,from 25 species,22 genera,10 families and 5 orders were identified.One-way Analysis of Variance(ANOVA)indicated:the Shannon-Wiener diversity and species richness of the fish community for Type A irrigation ditches were signifi-cantly higher than those in Type C ditches in summer (P <0.05);biomass for Type A and Type B ditches were dramatically higher than for type C ditches in autumn (P <0.05);Fish number and species richness of the fish community in Type B ditches were significantly higher than those in Type C ditches in autumn (P <0.05).Non-metric multidimensional scaling (NMDS)ordination and analysis of similarities (ANOSIM)show that the fish com-munities presented obvious seasonal variation in summer and autumn,and that the fish communities in summer are significantly different from those in autumn.However,differences among the three types of irrigation ditches do not vary with season.关键词
农田沟渠/鱼类/生物多样性/会仙湿地Key words
farmland ditches/fish/biodiversity/Huixian wetland分类
生物科学引用本文复制引用
胡祥,黄亮亮,吴志强,熊力,曹文锐,李富海,王小丽,黄海..广西会仙湿地农田沟渠鱼类群聚差异研究[J].水生态学杂志,2015,(5):15-21,7.基金项目
国家自然科学基金（51509042）；广西自然科学基金（2014GXNSFBA118072）；广西教育厅高校科学研究项目（YB2014151）；博士科研启动项目；广西高等学校高水平创新团队及卓越学者计划。 （）
