水资源保护2012，Vol.28Issue(1)：80-84,5.DOI:10.3969/j.issn.1004-6933.2012.01.019
三峡水库大宁河春季水华藻类分布及影响因子
Distribution of algae and its influencing factors in Daning River in Three Gorges Reservoir during period of spring algal bloom
洪尚波 1吴光应 1万丹 1付道林1
作者信息
- 1. 重庆市巫山县环境监测站,重庆404700
- 折叠
摘要
Abstract
Based on investigation data of the algal bloom in the Daning River, which is the tributary of the Three Gorges Reservoir, in the middle of March, 2010, the spatial and temporal distribution of algae and its influencing factors were studied. The results show that algal blooms not only occur in wide reservoir bays, but also in narrow valley belts, where there exist significant algal blooms that last longer periods of time. The planktonic algae in the estuary region show greater community stability and biological uniformity than other regions. With the increase of plankton biomass, the community stability of the planktonic algae decreased during the early and middle periods of the algal bloom and increased during the late period of the algal bloom. Through quantitative analysis of samples from the period of the algal bloom, the planktonic algae were classified as 24 genera of seven phyla, mainly including Chlorophyta and Pyrrophyta. The first dominant species were Peridiniopsis sp. , accounting for 38% of the total algae, followed by C. Vulgaris and Chlamydomonas. During the period of the algal bloom, the vertical migration of algae groups was observed, which might be due to the change of illumination and the phototaxis of algae. The algal bloom of Peridiniopsis sp. Reduced the N/P ratio of the water body. With the retrogression of the algal bloom, the N/P ratio quickly recovered to a relatively high level. The total phosphorus and the community stability of planktonic algae had a highly negative correlation during the early period of the algal bloom, and this correlation weakened during the middle and late periods.关键词
三峡水库/浮游藻类/水华/藻类分布Key words
Three Gorges Reservoir/ planktonic algae/ algal bloom/ distribution of algae分类
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洪尚波,吴光应,万丹,付道林..三峡水库大宁河春季水华藻类分布及影响因子[J].水资源保护,2012,28(1):80-84,5.
