The phytoplankton in Guniuhu of Qimen were investigated from 9,2006 to 6,2007, which including 99 species, belong to 61 genusrn5 phylum. The situations of water quality vieie evaluated by method of " Contaminative instruction species". The results indicated that therernwas a small influence on water quality guniuhu in Guniujiang nature reserve.%2006年9月至2007年6月对祁门牯牛降景区牯牛湖的浮游植物进行了调查,经鉴定共有浮游植物99属种,隶属于5门61属.采用"污染指示种"对牯牛湖的水质污染状况进行了评价,结果表明:旅游开发对祁门牯牛降自然保护区牯牛湖的水质影响微小.
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