砾漠区微地形下梭梭群落特征

Community Characteristics of Haloxylon ammodendronin in Different Microtopography of Gravel Desert

以克拉玛依盐渍化砾漠梭梭群落为研究对象,通过对不同形态地形进行植被调查,研究微地形对梭梭植被群落特征的影响。结果表明:研究区域发现植物14种,隶属7科11属,不同地形之间物种组成存在差异;地形改变对梭梭群落草本层和灌木层植被密度、盖度影响显著;地形扰动有利于梭梭群落优势种生物量的提高,地形以深沟效果最优;不同形态地形导致梭梭群落多样性存在差异,深沟物种多样性和丰富度最高,土垄一次之,CK最小。根据梭梭群落盖度、灌木密度、优势种生物量和物种多样性可知,深沟是进行砾漠植被生态恢复的有利工程措施,并为盐渍化砾漠植被恢复提供新途径。

Based on Haloxylon ammodendron community of the salinization gravel desert in Karamay, we studied the vegetation in different forms of terrain to explore the effect of different micro-topography on the community characteristics of H. ammo- dendron. There were 14 species of wild plants in 11 genera and 7 families in the study area. There were differences in spe- cies composition between different terrains. The coverage and density of herbs can be changed by the topography. The bio- mass of dominant species in H. ammodendron community can be improved by the topographic perturbation. The deep groove of terrain was optimum. We found the significant differences of diversity in H. ammodendron community among different to- pographies. The species diversity and richness were highest in deep groove, the ridge was lower and the CK was minimal. The terrain of deep groove was the effective engineering measures to restore the community in salinization of grave] desert according to the coverage of H. ammodendron community, shrub density, and the diversity of species.