汉阳地区五个湖泊沉水植物分布及富营养化现状

发布时间：2018-11-04 17:04

【摘要】：2011年7月—2012年4月对武汉市汉阳地区五个湖泊(后官湖,三角湖,南太子湖,墨水湖和龙阳湖)的水质及沉水植物进行了季节性调查,以了解湖泊富营养化现状及其对沉水植物的影响。结果显示:后官湖为中营养,而三角湖、南太子湖、墨水湖和龙阳湖为重度富营养,其中龙阳湖污染最重。共采集沉水植物7种,隶属于5科5属,主要种类为金鱼藻(Ceratophyllum demersum)、苦草(Vallisneria spiralis)和菹草(Potamogeton crispus)。沉水植物主要分布在后官湖沿岸带,其它四个湖泊中沉水植物已严重退化,仅在部分水域偶见。后官湖沉水植物盖度和生物量最大值出现在10月,分别为67.5%和5.58 kg/m~2,1月份较低,分别为29.3%和1.88 kg/m~2,优势种存在明显的季节更替。结果表明,汉阳地区湖泊沉水植物退化与富营养化引起的水下光照下降和高密度的水产养殖有关。
[Abstract]:From July 2011 to April 2012, a seasonal survey was conducted on the water quality and submerged plants of five lakes (Houguan Lake, Triangle Lake, South Prince Lake, Ink Lake and Longyang Lake) in Hanyang area, Wuhan City. In order to understand the status of eutrophication in lakes and its effect on submerged plants. The results showed that Houguan Lake was medium nutrient, while Triangle Lake, South Prince Lake, Ink Lake and Longyang Lake were heavy eutrophication, among which Longyang Lake was the most polluted. There are 7 species of submerged plants, belonging to 5 families and 5 genera. The main species are (Ceratophyllum demersum), (Vallisneria spiralis) and (Potamogeton crispus). The submerged plants are mainly distributed in the coastal zone of Houguanhu Lake. The submerged plants in the other four lakes have been seriously degraded and only occasionally seen in some water areas. The maximum coverage and biomass of submerged plants in Houguanhu appeared in October, which were 67.5% and 5.58 kg/m~2,1, respectively, with significant seasonal turnover of 29.3% and 1.88 kg/m~2, dominant species, respectively. The results showed that the degradation of submerged plants in lakes in Hanyang area was related to the decline of underwater light caused by eutrophication and the high density of aquaculture.
【作者单位】：江汉大学生命科学学院;
【基金】：国家自然科学基金项目(40901037) 武汉市市属高校教研课题(2014007)
【分类号】：X524;X173

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