长江流域资源与环境 >> 2010, Vol. 19 >> Issue (06): 685-.

• 湖泊资源与环境保护 • 上一篇    下一篇

巢湖浮游植物群落生态位的研究

汪志聪1,2|吴卫菊1,2|左明1,2|李敦海1*   

  1. (1.中国科学院水生生物研究所淡水生态与生物技术国家重点实验室|湖北 武汉 430072;2.中国科学院研究生院|北京 100049)
  • 出版日期:2010-06-20

NICHE ANALYSIS OF PHYTOPLANKTON COMMUNITY IN LAKE CHAOHU

WANG Zhicong1,2, WU Weiju1,2, ZUO Ming1,2, LI Dunhai1   

  1. (1. State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China|2. Graduate University of Chinese Academy of Sciences, Beijing 100049, China)〖
  • Online:2010-06-20

摘要:

运用物种间Levins生态位宽度和Petrailis生态位重叠计算公式分析了3月份巢湖东区和西区的24种优势浮游植物的生态位宽度值和生态位重叠程度,并以这两个参数为基础研究浮游植物物种间生态关系及它们与周围环境的相互影响。结果表明巢湖东区星形冠盘藻、啮蚀隐藻、颗粒直链藻最窄变种等10个种的生态位较宽,均大于3,而巢湖西区生态位较宽的主要有星形冠盘藻、啮蚀隐藻、卵形隐藻等9个种;研究结果还表明以生态位变动幅度大的种类作为水质指示种有更可靠的生态学意义,因此确定了以颗粒直链藻最窄变种、水华鱼腥藻和星杆藻sp.这3种藻作为巢湖水体区域污染状态的指示种。生态位重叠表明在巢湖东区蛋白核小球藻的发展速度最快;在巢湖西区星杆藻sp.的发展速度最快;巢湖西区的发展种比东区的发展种更多,大多数为耐污染的种。随后4月份进行了浮游植物群落组成调查,比较2次采样群落结构差异,验证了浮游植物生态位模型在巢湖鱼腥藻水华预测方面应用的可靠性。

Abstract:

The niche breadths and overlaps of 24 dominant phytoplankton species in the Lake Chaohu in March 2008 were measured using corresponding formulas respectively,and the ecological influence among all the dominant species and the relationships between phytoplankton species and ambient environment were discussed in this paper.The results showed that the niche breadths of 〖WTBX〗Stephanodiscus astraea,Cryptomonas erosa〖WTBZ〗,〖WTBX〗Melosira granulata〖WTBZ〗,etc.in the east of Lake Chaohu exceed 3,and in the west of Lake Chaohu,the algae with greater niche breadth are 〖WTBX〗Stephanodiscus astraea,Cryptomonas erosa,Cryptomonas ovata〖WTBZ〗,etc.The results showed that selecting the phytoplankton with wide range of niche breadths as indicator is more reliable.Thus we take 〖WTBX〗Melosira granulata,Anabaena flosaguae〖WTBZ〗 and 〖WTBX〗Asterionella〖WTBZ〗 sp.as indicators in the west area of Lake Chaohu.The niche overlaps suggest that 〖WTBX〗Chlorella pyrenoidosa〖WTBZ〗 is developing fastest in the east area of Lake Chaohu,while 〖WTBX〗Chlorella pyrenoidosa〖WTBZ〗 set a fast pace in the west area.The abundance of developing phytoplankton in the east area is greater than that in the west area.These species are growing faster,and most of them can tolerate polluted environment.Subsequently,comparing phytoplankton community structure of the Lake Chaohu in April with that in March,we can draw a conclusion,namely it is reliable to forecast the surface water bloom of Anabaena flosaguae by niche calculation.〖

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