富营养化湖泊刚毛藻建群特征及其影响因素
The characteristics of Cladophora community and its influencing factors in a eutrophic lake
查看参考文献32篇
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文摘
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为研究富营养化湖泊刚毛藻建群过程及其影响因素,在草海沿岸带水深为5,25,45,65,85cm处分别放置大理石板作为刚毛藻建群的人工基质,监测人工基质上刚毛藻群落的生物量、藻丝长度以及附着硅藻的密度和组成.结果发现,2周后,水下25cm处的刚毛藻群落的生物量最大,为9.0mg/cm~2.4周后,水下5cm处刚毛藻群落的生物量为14.0mg/cm~2,是25cm处刚毛藻群落生物量的1.62倍.整个实验期间,水下65,85cm处刚毛藻群落的生物量一直较少,生物量分别为2.86,1.39mg/cm~2.相对其它深度,5cm处刚毛藻藻丝长度最长,最高值为11.8cm.在第6周,水下5cm处刚毛藻群落中附着硅藻的密度最大,为7.8×10~6cell/cm~2.分析结果显示,NH_4~+-N浓度、水下光照强度和SRP浓度是显著影响刚毛藻群落特征(刚毛藻群落生物量、刚毛藻藻丝长度和附着硅藻密度)的因子,而NH_4~+-N浓度和pH值是影响硅藻群落组成的显著性环境因子. |
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其他语种文摘
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In order to study the Cladophora community characteristics and the factors influenced the process in eutrophic lakes, the marble plates were placed in the depth of 5, 25, 45, 65, 85cm in coastal of Caohai Lake used for the measurement of the biomass of Cladophora community, the length of Cladophora and the density and composition of attached diatom. After two weeks, the biggest biomass of Cladophora community was 9.0mg/cm~2 at underwater 25cm. Four weeks later, the biggest biomass of the Cladophora community was 14.0mg/cm~2 at underwater 5cm, which was 1.62 times that of the Cladophora community underwater 25cm. During the experiment, the Cladophora community biomass at 65cm and 85cm were 2.86mg/cm~2 and 1.39mg/cm~2, respectively, which are less than those of other depth of water. The longest length of the Cladophora filaments was 11.8cm at the depth of 5cm. At the 6th week, the biggest density of attached diatoms community was 7.8×10~6 cells/cm~2 at the depth of 5cm. Statistical analysis indicated that the characteristics of Cladophora community were significantly affected by NH_4~+-N concentration, underwater light intensity and SRP concentration, and species composition of attached diatom were significantly affected by NH_4~+-N concentration and pH value. |
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来源
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中国环境科学
,2017,37(12):4667-4674 【核心库】
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关键词
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富营养化
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刚毛藻群落
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水深
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地址
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中国科学院水生生物研究所, 中国科学院淡水生态与生物技术重点实验室, 湖北, 武汉, 430072
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1000-6923 |
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学科
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环境污染及其防治 |
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基金
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国家自然科学基金资助项目
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国家重大水专项滇池项目
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文献收藏号
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CSCD:6133591
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