作者: Marinus J.A. Werger

Steppes form one of the largest biomes. Drastic changes in steppe ecology, land use and livelihoods came with the emergence, and again with the collapse, of communist states. Excessive ploughing and …

Southern Africa is certainly not a naturally bounded area so that there are several possibilities for delineating it and concepts about its extent. Wellington* discussed the various possibilities for …

biological attributes of the three species according to the sequence in which they invade successively as a conse- Studies on sample plots in Halimione portulacoides com- munities show that environme …