【摘 要】
：
水库修建对湿地植物多样性和分布格局的影响是目前研究的热点.梯级水库由于开发时间的不同而成为理想的利用空间代替时间的研究平台,即可以通过不同开发时间水库植物群落结构
【机 构】
：
中国科学院水生植物与流域生态重点实验室,武汉 430074;中国科学院武汉植物园 湿地演化与生态恢复湖北省重点实验室,武汉 430074
论文部分内容阅读
水库修建对湿地植物多样性和分布格局的影响是目前研究的热点.梯级水库由于开发时间的不同而成为理想的利用空间代替时间的研究平台,即可以通过不同开发时间水库植物群落结构的横向比较,从时间尺度上评估水电开发对水陆交错区湿地植物分布格局的影响.本研究选取乌江上游代表性的 8座梯级水库,在其水陆交错区通过建立 3条不同样带,比较分析不同水库间以及不同样带问湿地植物多样性和分布格局,探讨水库修建对湿地植物格局的影响.调查结果表明,乌江干流 8个水库湿地植物共 84科 199属 247种,其中物种最多的科为禾本科(Gramineae),共计 24种,物种最多的属为蓼属(Po-lygonum)共计 6种,优势物种分别为白茅(lmperata cylindrica)、盐肤木(Rhus chinensis)、金樱子(Rosa laevigata)、小白酒草(Conyza canadensis)和狗牙根(Cynodon dactylon).就湿地植物分布格局而言,乌江梯级水库植物群落呈现出明显的带状分布格局,第一条样带即水库消落区植物多样性与非消落区(第二、第三条样带)差异明显,消落区不同样点间多样性与水库海拔、水库修建时间、水库坡度密切相关,后续湿地植物的研究将重点关注梯级水库的消落区.
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