景观水体富营养程度对藻类分布的影响

发布时间：2019-05-27 07:50

【摘要】：首先对西安市两个不同景观水体水质进行了为期一年的连续监测,在此基础上采用湖泊综合营养状态指数法评价了两水体富营养程度的差异,最后分析了两水体中藻类的分布与富营养程度的关系。结果表明:1重度和中度富营养化水体中可检测到的藻类分别为53属和39属,重度富营养化水体中可检测到的藻属明显大于中度富营养化水体的对应值,但中度富营养状态水体优势藻的主导能力强于重度富营养化水体,尽管两者的年均藻细胞密度并无数量级的差异。2虽然区域相同,但重度和中度富营养化水体中,最多和最少藻属出现时间并不相同,前者分别为8月和11月,后者分别为10月和12月。3伪鱼腥藻是再生水补给的中度富营养化水体中颇具竞争力的藻属,可在一年的10个月中超越小球藻而成为该类水体的主导藻属。总之,城市景观水体的富营养程度对其中藻的类属、优势藻的主导能力及藻属数极值时间均有影响。
[Abstract]:Firstly, the water quality of two different landscape water bodies in Xi'an was monitored continuously for one year, on the basis of which the difference of eutrophication degree between the two water bodies was evaluated by lake comprehensive nutritional status index method. Finally, the relationship between the distribution of algae and the degree of eutrophication in the two water bodies was analyzed. The results showed that: (1) the number of algae detected in severe eutrophication water was 53 genus and 39 genus, respectively, and the corresponding value of algae in severe eutrophication water was significantly higher than that in moderate eutrophication water. However, the dominant ability of dominant algae in moderate eutrophication state was stronger than that in severe eutrophication water, although there was no difference in the average annual cell density between the two groups. 2 although the region was the same, in severe and moderate eutrophication water, The occurrence time of the most and the least algae is not the same, the former is August and November, the latter is October and December, respectively. 3 Anabaena is a competitive genus in moderately eutrophication water recharged with reclaimed water. It can surpass Chlorella vulgaris in 10 months of the year to become the dominant genus of this kind of water body. In a word, the eutrophication degree of urban landscape water body has influence on the genus of algae, the dominant ability of dominant algae and the extreme time of algae number.
【作者单位】：西安建筑科技大学环境与市政工程学院;大唐环境产业集团股份有限公司特许经营分公司;
【基金】：西安市科技计划专利示范项目(SF1430)
【分类号】：X52

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