长江流域资源与环境 >> 2012, Vol. 21 >> Issue (08): 942-.

• 自然资源 • 上一篇    下一篇

雅鲁藏布江谢通门江段着生生物和底栖动物资源初步研究

马宝珊| 谢从新| 杨学峰|霍斌   

  1. (华中农业大学水产学院|湖北 武汉 430070)
  • 出版日期:2012-08-20

A PRELIMINARY STUDY ON PERIPHYTON AND ZOOBENTHOS IN THE XAITONGMOIN REACH OF THE YARLUNG ZANGBO RIVER

MA Baoshan, XIE Congxin, YANG Xuefeng, HUO Bin   

  1. (College of Fisheries, Huazhong Agricultural University, Wuhan 430070, China)
  • Online:2012-08-20

摘要:

分别于2008年10月、12月和2009年3月、8月对西藏雅鲁藏布江谢通门江段的着生生物和底栖动物进行了调查。本次调查共检出着生生物12门104属,底栖动物3门26属。着生生物的密度和生物量以春季最高,分别为1 478 501.6 ind./cm2和45 912.8×10-4 mg/cm2,夏季最低,分别为1 037.1 ind./cm2和457×10-4 mg/cm2;而底栖动物的密度以秋季最高,为7 706.2 ind./m2,但生物量却以春季最高,为128 g/m2。着生生物和底栖动物的Margalef丰富度指数(D),ShannonWiener多样性指数(H’)和Pielou均匀性指数(J)均以夏季最高。其中,着生生物以硅藻最多,其优势属为等片藻和桥弯藻;底栖动物以摇蚊幼虫最多。研究表明,雅鲁藏布江谢通门江段着生生物和底栖动物的种类数和现存量呈现明显的季节差异,这可能主要与水位等环境因子有关

Abstract:

An investigation on periphyton and zoobenthos in the Xaitongmoin reach of the Yarlung Zangbo River was carried out in October and November,2008 and March and August,2009,respectively.Altogether 104 genera, 12 phyla of periphyton, 26 genera, 3 phyla of zoobenthos were collected in this study.The density and biomass of periphyton were highest in Spring,which were 1 478 501.6 ind./cm2 and 45 912.8×10-4 mg/cm2,respectively.The density and biomass of periphyton were lowest in Summer,which were 1 037.1 ind./cm2 and 457×10-4 mg/cm2,respectively.The density of zoobenthos were highest (7 706.2 ind./m2) in Autumn,and the biomass of zoobenthos were highest (128 g/m2) in Spring. Margalef’s richness index (D),ShannonWiener index (H’) and Pielou’s evenness index (J) of periphyton and zoobenthos were all highest in Summer.The most prevalent organisms within periphyton was diatoms,the principal genera were 〖WTBX〗Diatoma〖WTBZ〗 and Cymbella. The most prevalent organisms within zoobenthos was chironomid larvae.There were seasonal variations with the species and biomass of periphyton and zoobenthos in the Xaitongmoin reach of the Yarlung Zangbo River,which may be relative to the ecological factors such as water level. 

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