摘要
异龙湖为中国云南九大高原湖泊之一,是处于草型向藻型湖泊转化节点上的典型高原湖泊,因历史原因,异龙湖东西湖区水环境条件差异较大,可较好的代表云南高原草型及藻型湖泊类型,因此研究异龙湖的沉水植物时空分布与水环境因子关系,对于我国高原湖泊的保护具有重要意义,且自1980年以来异龙湖沉水植物相关研究成果较少,因此,本研究在异龙湖开展为期一周年的水环境因子及沉水植物调查,对沉水植物分布格局及其与水环境因子之间相互关系进行了研究,以期为异龙湖的沉水植物研究留下珍贵的历史资料,并探索异龙湖沉水植物分布格局及其影响因子,为沉水植物恢复提供数据及技术支撑。结果表明:东西湖区沉水植物的群落结构具有显著差异,西湖区小茨藻(Najas minor All.)、狸藻(Utricularia vulgaris L)、轮叶黑藻(Hydrilla verticillata)等为优势种,东湖区篦齿眼子菜(Potamogeton pectinatus L)、狐尾藻(Myriophyllum verticillatum L)为优势种,且西湖区沉水植物的生物量及物种丰度显著高于东湖区。通过相关性分析看出水深、透明度、溶解氧是影响异龙湖沉水植物分布的主要环境因子,总氮、总磷、氨氮及pH是次要影响因子,异龙湖在现状条件下恢复沉水植物应针对不同湖区恢复采用不同的恢复策略,选择不同的沉水植物种类开展恢复工作。
Yilong lake is one of the nine plateau lakes in Yunnan Province, China. It is a typical plateau lake on the node of evolution from plant-type lake to algae-type lake. For historical reasons, the water environment conditions in Yilong lake are completely different between the East and West areas, which is a good representative plant-type and algae-type Lake in Yunnan Plateau. There have been few research results on submerged plants in Yilong lake since 1980. To address this issue, in this study, the water quality and submerged plants of Yilong Lake are investigated for one year period, the distribution of submerged plants and their relationship with water environment factors are also studied, with aims to leave precious historical data for the study of submerged plants in Yilong lake and explore the distribution and impact factors of submerged plants, provide data and technical support for submerged plant restoration. Furthermore, results indicate the spatial distributions of submerged plants are significantly different between the East and West Lake areas with the dominant species of Najas minor, Utricularia vulgaris and hydrilla verticillata in the West Lake area while potamogeton pectinatus and Myriophyllum verticillatum in the East Lake area, the coverage, biomass and species richness of submerged plants in the West Lake area are significantly higher than that in the East Lake area. Meanwhile, the results of correlation analysis show that water depth, transparency and dissolved oxygen are the main environmental factors affecting the distribution of submerged plants in Yilong lake, while total nitrogen, total phosphorus, ammonia nitrogen and pH are the secondary factors. Different restoration strategies should be adopted and different submerged plant species should be selected for restoration in different lake areas.
作者
方馨
赵风斌
柴晓利
王丽卿
FANG Xin;ZHAO Feng-bin;CHAI Xiao-li;WANG Li-qing(School of Ocean and Atmosphere,Ocean University of China,Qingdao 251200,China;College of Environmental Science and Engineering,Tongji University,Shanghai 200080,China;School of Fisheries and Life,Shanghai Ocean University,Shanghai 200090,China)
出处
《长江流域资源与环境》
CAS
CSSCI
CSCD
北大核心
2021年第3期636-643,共8页
Resources and Environment in the Yangtze Basin
基金
国家科技重大专项(2017ZX07202002)
长江口水源保护区富营养化防治关键影响因子控制对策研究(18DZ1206505)。
关键词
异龙湖
沉水植物
分布格局
环境因子
相关性
Yilong Lake
submerged plants
distribution
environmental factors
relationship
