【摘要】 对南水北调东线工程中的调蓄枢纽东平湖进行了考察.发现,目前东平湖仅存水生植物18种,覆盖度为51%.简要分析了1979年至今东平湖水生植物的衰退状况及其形成驱动力.根据调水状态下东平湖水环境将会发生的变化,系统探讨了调水工程对东平湖水生植物的可能影响.结果表明,二期工程物种多样性变化不大,分布面积将会有不同程度的下降,群落总体的断带状分布将更为典型;三期工程物种多样性将明显下降,种群结构趋向单一化,沉水植物仍将成为优势种群.更多还原

【Abstract】 Dongping Lake is the hinge possessing important strategic significance in the east route of the south-to-north water transfer project. Now, there are only eighteen kinds of hydrophyte in Dongping Lake, and the covered extent is 51%. This paper make first the brief analysis on the decline of hydrophyte and its cause of Dongping Lake since the year 1979. The possible influence of the phase Ⅱ project and phase Ⅲ project on the lake hydrophytes is analyzed systematically, according to the change of aquatic environment, which might occur in Dongping Lake under the tramper state. On the phaseⅡ project, the species diversity of the hydrophytes will vary little, the distribution area of the species will decrease, and the discontinuous distribution belts of hydrophytes will be more typical. On the phase Ⅲ project, the species diversity will decrease obviously, the community structure will be more simple, and submerged plants will continuously be dominant community.更多还原