长白山区河漫滩草地植物多样性与功能性状研究

Study on Plant Diversity and Functional Properties of Flood Plain Grassland in Changbai Mountain Area

河漫滩草地对河流与河岸生态保护起着重大的作用,同时作为优良的牧草刈割草地,具有较高的经济价值.本文针对长白山区河漫滩草地群落的物种多样性和功能多样性进行了研究,以期实现对其更好地保护与开发利用.以五道白河河漫滩草地为研究区,采用样方法进行实验.结果显示,该地区主要优势物种为长芒野稗,物种的丰富度较低;群落中的α-多样性指数表现出相关性,其中均匀度、优势度指数与整个群落物种多样性线性相关,而物种的数目与多样性关系不是十分密切;生物功能性状间的相互关系非线性,叶片生物量与叶片面积表现出明显的正相关关系,而叶片生物量与比叶面积、比叶面积与植株高度间表现出比较明显的负相关关系;物种多样性与功能性也存在联系,与具体的生物特征有关.

Flood plain grassland, which plays important roles in sustaining the ecological functions of the rivers,belongs to the most important terrestrial ecosystems on earth. This study concentrates on plant diversity and functional properties of the grassland vegetation of flood plain in the area of Changbai moutain, where Echinochloa caudate is the dominant specie. It may help us to understand the composition and plant diversity there, and provide a theoretical basis to protect local environment. The Alpha-diversity indexes showed a close relationship to each other.Meanwhile, significant correlations between different functional traits of various species were observed. It also find that these functional traits are related to the important value of due species.