| Latitudinal changes in species diversity of permafrost wetland plant communities in Great Xing’an Mountain valleys of Northeast China |
| |
| 作者姓名： | Sun J Li X Z Wang X W Lv J J Li Z M Hu Y M |
| |
| 作者单位： | Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China/Graduate University of Chinese Academy of Sciences, Beijing 100049, China,Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China,Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China/Graduate University of Chinese Academy of Sciences, Beijing 100049, China,Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China/Graduate University of Chinese Academy of Sciences, Beijing 100049, China,Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China/Graduate University of Chinese Academy of Sciences, Beijing 100049, China,Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China |
| |
| 摘 要： | Studying the changes of species diversity in plant communities along latitude gradients is important to discover the correlation between biodiversity and environmental factors. Along the main ridges of the Great Xing’an Mountains, 12 natural permafrost wetlands in the valleys were investigated from north to south. Latitudinal changes in species diversity were analyzed with regressive analysis. About 150 plant species were recorded and were found to be in the 12 permafrost wetland plant communities. Most plants belong to the Compositae or Gramineae. The number of family, genus and species increased significantly in the herb layer with decreasing latitude (P < 0.01), but decreased significantly in the shrub layer (P < 0.01). Species composition and the orders of dominant species in the plant communities by importance value changed along latitude. Latitudinal changes of α-diversity in permafrost wetland plant communities were different in the herb and shrub layers. With decreasing latitude, species richness and species diversity increased in the herb layer; but decreased in the shrub layer. The opposite patterns were found for species dominance. Species evenness in the shrub layer decreased with decreasing latitude. ?-diversity in the herb and shrub layers decreased first, and then increased, and finally decreased with increasing latitude. Species composition in the herb layer was similar among the plots at higher latitudes.
|
| 关 键 词： | Great Xing’an Mountains Permafrost Wetland Species diversity Latitudinal gradient |
| 本文献已被 ScienceDirect 等数据库收录！ |
| 点击此处可从《农业工程》浏览原始摘要信息 |
|
点击此处可从《农业工程》下载免费的PDF全文 |
|
