| Study on bryophyte communities in planted pastures of valley area of Tibet |
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| DOI：10.7606/j.issn.1000-7601.2010.05.42 |
| Key Words: planted pasture bryophyte community species diversity CCA Tibet |
| Author Name | Affiliation | | LI Rong | College of Biological Sciences, China Agricultural University, Beijing 100193, China | | YU Chengqun | Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China | | JIANG Yanbin | College of Biological Sciences, China Agricultural University, Beijing 100193, China | | LIU Xinchao | College of Biological Sciences, China Agricultural University, Beijing 100193, China | | SHAO Xiaoming | College of Biological Sciences, China Agricultural University, Beijing 100193, China |
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| Abstract: |
| 28 plots of 6 sites were investigated to identify the bryophytes communities on planted pastures in valley area of Tibet, China. 3～5 quadrates of 25 cm×25 cm with 100 grids were selected to count the coverage of bryophytes in each plot. The result showed that there were 13 species of bryophytes (including 2 varieties), belonging to 6 genera and 2 families, and Bryum argenteum was widely distributed in the whole research area. The bryophytes communities were obviously different on species richness among the plots, but on species evenness. The similarity between any two communities was higher if their niches were more similar to each other. Based on Canonical Correspondence Analysis (CCA) of relationship between bryophytes and environmental factors, it indicated that the distribution of bryophytes was more affected by temperature and relative humidity of the niche. The highest species diversity was located around planted pastures and the lowest (almost no bryophyte) was located inside the planted pastures which were planted this year. As time went on, the bryophyte communities, dominated by genera Bryum, would be formed in the new planted pastures with decrease of the disturbances and stabilization of the topsoil. It consented that the results above can be applied for avoiding soil and water erosion, and reducing the possibility of desertification as well if the planted pasture will be cut instead of being grazed around the first planted year. |
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