Effect of Restoration Methods on Species Composition of Bryophytes in Karst Habitats

Abstract:

In order to explore the effects of ecological restoration methods on bryophyte, the species composition in different habitat types in Zhongliangshan Karst area of Chongqing, China under natural abandonment and conversion of farmland to forest, et al. was studied. The results showed that there were 41 species of bryophytes in 15 families and 26 genera, including 39 mosses and 2 liverworts, and Eurohypnum leptotholum was the dominant species. Lithophytic mosses occupy a large proportion, and their life forms are mainly tiled and clustered. The species diversity and similarity index of all habitats were low on the whole. Bryophytes in bamboo forest and Masson pine forest had higher species diversity than those in abandoned weedy land, shrub land and economic forest. Redundancy analysis showed that canopy density and light intensity were the key environmental factors affecting bryophyte distribution, tree forest provided more suitable habitats for bryophyte growth. Therefore, compared with natural restoration and economic forest restoration, returning farmland to forest was a more ideal ecological restoration method for karst degraded habitats.

Key words:Karst habitat;Ecological restoration method;Bryophyte;Biodiversity