Aims : We address the following questions: 1) Which are main vegetation types that currently occur in Arid Chaco? 2) Do those differ terms of floristic composition, endemism, chorotypes and life forms? 3) Is there any spatial association between environmental heterogeneity Study area The southwestern extreme Gran Chaco, Central-Western Argentina. Methods survey was based on a dataset comprising...

East African riparian corridors are biodiversity hot spots that occur in catchments degrading under deforestation and overgrazing. Quadrats belt transects were employed to investigate plant succession along the River Gilgil, Kenyan Rift Valley. The study found most species (total 365) broadly distributed across tropics, but Valley endemics 12.5%, 4%–18% exotic. Plant composition varied with alt...