Abstract:Physico-chemical data (including nutrients, BOD5, suspended organic matter), microbial variables (bacteria abundance) and phytoplankton species and biomass were determined on April (withered water period) and July (high water period) 2009 from 19 sampling sites in Guchenghu Lake and Wushen canal route. The water pollution status was evaluated based on trophic level index and Shannon-Wiener index. The Guchenghu Lake and Shuiyangjiang River showed light eutrophication level with better water quality, while the Guanxihe River and Xuhe River showed middle eutrophication level characterized by heavy human and natural pressure. The trophic level index increased with a downward trend in the downriver water. Nitrogen and phosphorus were the main water pollutants in the study area, while the poisonous and organic matter pollution could be ignored. Nine phylum, 22 familia, 36 genus, 74 species phytoplankton were found in the research. The cyanobacteria abundance dominated and the chlorophyta was in the second place in April in the Guchenghu Lake, while in the canal route the chlorophyta and cryptophyta were the main phytoplankton species. Cyanobacteria had the dominance ratio in all sampling sites in July, and the Shannon-Wiener index in Guchenghu Lake was much higher than that in other sites.
曾庆飞, 谷孝鸿, 毛志刚, 孙明波, 谷先坤. 固城湖及上下游河道富营养化和浮游藻类现状[J]. 中国环境科学, 2012, 32(8): 1487-1494.
ZENG Qing-Fei, GU Xiao-Hong, MAO Zhi-Gang, SUN Ming-Bo, GU Xian-Kun. Assessment of trophic levels and phytoplankton variation in Guchenghu Lake and canal route.. CHINA ENVIRONMENTAL SCIENCECE, 2012, 32(8): 1487-1494.