燕沟流域不同植被恢复重建途径下物种多样性研究

在燕沟流域选取5个物种多样性指数对其天然及人工群落物种多样性进行了研究,分析了植被恢复重建途径(自然恢复、人工恢复、自然和人工恢复)与物种多样性的关系.研究结果表明,天然灌木林群落物种多样性和均匀度指数最大,天然草本群落与人工乔木林群落接近,人工灌木林群落最小;影响人工乔木林和灌木林群落林下草本层物种多样性和均匀度指数变化的主要因素有植物物种种源、植物自身因素(初植密度)和人为因素(破坏、放牧时间).

Yangou Watershed the Research on Bio-diversity under Ways of Vegetation Restoration

According to the research on the natural and artificial communities by five indexes of species diversity in Yangou watershed, this article discussed the relationship between re-vegetation ways (natural restoration, artificial restoration, natural and artificial restoration) and species diversity. The results showed that as to the indexes of diversity and evenness, natural bush community has the highest ones, and artificial arbor community has no significant difference with the natural herb community, and artificial bush community has the lowest indexes of diversity and evenness. The main factors influencing indexes of the diversity and the evenness of herb layer under the artificial arbor and herb are species source, plants' own factor(plant density)and human factor (destroying, grazing and time).