长江干流湿生植物群落分布格局及影响因素
Journal: Ecological Environment and Protection DOI: 10.12238/eep.v5i3.1572
Abstract
自然水文节律是湿生植物进化的主要驱动力,植物因而逐步形成了与周期性水文过程相适应的形态特征、生活史对策和物候节律。本研究首先选择长江泛滥平原14个湖泊及长江干流17个江段开展现场调查,分析湿生植物的水文生态位和水文梯度分布。结果显示,在长江泛滥平原共记录湿生植物31科88属163种,其中湖泊有27科85属115种,干流有31科88属113种。不同水位波动型式的湖泊湿生植物群落特征存在较大差异。影响因素分析结果显示,水位波动、地形(高程)、底质类型、底质营养、土壤含水率和人为干扰度对湿生植物的群落特征均有影响,其中水位波动是最主要的影响因素。
Keywords
长江流域；湿生植物；环境水流；水位；底质
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