鄂尔多斯地区不同生境类型对苔藓植物多样性和丰富度的影响

Effect of Different Habitats on the Diversity and Richness of Bryophyte in Erdos Region

对鄂尔多斯地区皇甫川人工治理区和阿贵庙自然保护区不同生境类型下的苔藓植物的多样性和丰富度进行研究.结果表明,维管植物的种类和分布影响苔藓植物的生长和分布模式,其创造的微生境为苔藓植物提供了避难所,但维管植物产生的地被物(枯枝、落叶)又抑制了苔藓植物在其下的分布.苔藓植物α多样性的变化不仅与生境的变化有关,还与构成生境的群落结构要素有关,这些结构要素包括群落的层片结构,维管植物的郁闭度、盖度、种类组成,地被物的盖度和分布格局,藻类的盖度和分布格局.苔藓植物β多样性的变化与群落结构的关系更为密切,相似群落结构间的β多样性相似系数明显高于结构存在差异的群落.

The research of the diversity and richness of bryophyte in Huangpuchuan artificial water and soil holding experimental region and Aguimiao natural conservation region showed that the variety and distribution of vascular affect the growth and distribution of moss, the created micro-habitats provide the shelters for the settlement of bryophyte. But ground covers （withered tree branch, fallen leaves） vascular produces habitats the distribution of the bryophyte under it. The change of bryophyte α diversity has relationship not only with constructive elements but also with the constructive elements including synusium construction of constructies, the canopy density, cover and variety of plants, the cover and distribution of ground cover, and the cover and distribution of algae. The change of bryophyte β diversity relates more with community construction. The diversity similarity coefficient of similar communities is obvious higher than that of communities which are different in construction.