Key Parameters of Water Level Fluctuations Determining the Distribution of Carex in Shallow Lakes
Key Parameters of Water Level Fluctuations Determining the Distribution of Carex in Shallow Lakes
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DOI：
10.1007/s13157-017-0934-0
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发表时间：
2017-12
期刊：
影响因子：
2
通讯作者：
Saibo Yuan;Zhendong Yang;Xueqin Liu;Hongzhu Wang
中科院分区：
文献类型：
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作者：
Saibo Yuan;Zhendong Yang;Xueqin Liu;Hongzhu Wang
确定关键水文参数，构建生物群落是湿地生态系统保护和恢复的关键。以长江中下游沿着浅水湖泊为研究对象，研究了影响典型湿地植物苔草分布的水位波动关键参数。2011-2015年，对13个不同水负荷的浅水湖泊的植物群落和环境变量进行了调查。共确定了14个参数，包括3个组成部分的WLF，并分析了它们对苔草分布的影响。结果表明，研究湖泊中Carexin的分布存在明显的时空差异.土壤有机质、人为干扰、基质类型和土壤含水量是影响植物类群分布的关键因子。水位变化率和水面高程是决定春季苔草覆盖度和生物量的主要参数。在秋季生长季节，水位变化率，海拔以上的水，和出现的时间是重要的。这些结果为该地区浅水湖泊中苔草和其他湿生植物的保护和恢复提供了重要见解。
Identifying critical hydrologic parameters that structuring biological communities is crucial for the conservation and restoration of wetland ecosystems. The present study determined the key parameters of water level fluctuations (WLFs) influencing the distribution of a typical wetland plant,Carex, in shallow lakes along the middle and lower reaches of the Yangtze River. The plant community and environmental variables in 13 shallow lakes with different WLFs were investigated during 2011–2015. A total of 14 parameters included in three components of WLFs were identified, and their effects on the distribution ofCarexwere analyzed. The results showed that distribution ofCarexin the studied lakes differed obviously in time and space. WLFs were the critical factors influencing the taxa distribution, whereas soil organic matter, human disturbance, substrate type, and soil moisture were of little importance. Rate of water level change and elevation above water were the main parameters determining the coverage and biomass ofCarexduring the spring growing season. In the autumn growing season, rate of water level change, elevation above water, and emergence timing were important. These results provide important insights into the conservation and restoration ofCarexand other hygrophytes in shallow lakes in this region.