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引用本文:项斯端,吴文卫.杭州西湖湖底附泥藻群落.湖泊科学,1999,11(2):177-183. DOI:10.18307/1999.0216
XIANG Si-duan,WU Wen-wei.Epipelic Algal Community on the Bottom of West Lake, Hangzhou. J. Lake Sci.1999,11(2):177-183. DOI:10.18307/1999.0216
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杭州西湖湖底附泥藻群落
项斯端, 吴文卫
杭州大学生命科学学院, 杭州 310012
摘要:
杭州西湖在 20世纪 40年代湖底附泥藻群落以蓝藻门静水隐杆藻为优势,占 98%-99%,而 90年代本次调查时发现随着水体富营养化底栖性的附泥藻群落由蓝藻型转变为以硅藻门放射针杆藻为优势的群落.根据1991年4月及12月调查全湖各湖区该群落分为三个组合:(1)放射针杆藻组合:外湖及北里湖,藻密度高,(302-575) × 104个· g-1.放射针杆藻占总藻量的412%-528%.(2)凸腹脆杆藻-放射针杆藻组合:分布在西部三个湖区.藻密度低,仅为前一组合的 113或 118.(3)静水隐杆藻组合:仅存在于三潭印月内湖.
关键词:  附泥藻群落  放射针杆藻  静水隐杆藻  杭州西湖
DOI:10.18307/1999.0216
分类号:
基金项目:国家自然科学基金资助项目呢(39370140)
Epipelic Algal Community on the Bottom of West Lake, Hangzhou
XIANG Si-duan, WU Wen-wei
Life Science college, Hangzhou University, Hangzhou 310012
Abstract:
Epipelic algal community and phytoplankton community are two correlative communities in the same ecosystem of West Lake, Hangzhou. In the 1940s, Aphanothece stagnina was a dominate species in the epipelic algal community, occupying 98% -99% of the sediment in West Lake. Therefore forwarded a half centenary, following the eutrophication of the lake, the transparency of water decreased, and the decrement induced a corresponding succession of the epipelic algal community. The dominant species are changed from Aphanothece stagnina to Synedra herolinensis.The epipelic algal community in West Lake can be divided into 3 assemblages:(1) Synedra berolinensis Assem.: Distributed in Waixihu and Beilihu area with relatively high algal density, 302×104-575×104ind·g-1. Synedra berolinesis is a dominant species, occupying 41.2%-52. 8% of total algal number in the assemblages.(2)Fragilaria construens var venter-Syneclra berolinensis Assem.: Distributed in 3 lake areas which are located in the western part of the lake(Xilihu, Yuehu and Xiaonanhu). The algal density is 1/3 -1/8 of the first assemblage.(3) Aphanothece stagnian Assem.: Only exists in the inner lake on Santanyinyue island.
Key words:  Epipelic algal community  Synedra berolensis  Aphanothece stagnian  assemblage  West Lake (Hangzhou)
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