首页 | 本学科首页   官方微博 | 高级检索  
   检索      


Diversity and occurrence of herbaceous communities in West African savannas in relation to climate,land use and habitat
Authors:Issouf Zerbo  Markus Bernhardt-Römermann  Oumarou Ouédraogo  Karen Hahn  Adjima Thiombiano
Institution:1.Laboratory of Plant Biology and Ecology,University Ouaga I Pr Joseph Ki-Zerbo,Ouagadougou 03,Burkina Faso;2.Institute of Ecology,Friedrich Schiller University Jena,Jena,Germany;3.Department of Ecology and Geobotany, Institute for Ecology, Evolution and Diversity,J. W. Goethe University,Frankfurt am Main,Germany
Abstract:In the face of the current changes in land use and climate as well as habitat destruction, it is important to study herbaceous vegetation as an indicator of changes occurring in savanna ecosystems. We investigated the effects of climate, land use and habitat, both alone and in combination, on the diversity and occurrence of West African savanna herbaceous plant communities. Floristic data and environmental variables were sampled in Burkina Faso and subjected to ordination and indicator species analysis to explore the variation in nine vegetation types. Regression analyses showed that climate, land use, humidity gradient, soil fraction and vegetation structure discriminate herbaceous plant communities. Climate, habitat and their interaction had the greatest effect on the occurrence of these communities. Changes in species richness of the studied communities were mainly due to climate, land use and their interaction, which were more important for increasing rather than decreasing diversity. In all cases, climate conditions remained the most important environmental factor driving vegetation variation in West African savannas. Beside this, the effects of habitat degradation in interaction with land use and climatic conditions indicate land use to be a threat for the diversity of the herbaceous vegetation.
Keywords:
本文献已被 SpringerLink 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号