Dens built among tree roots can last for decades, while those dug on the steppes last only several years.
Laura Fox, a postdoctoral researcher with the University of Pennsylvania, writes from Mongolia, where she is studying the effects of climatic warming on steppe vegetation.
Set among lakes, sandy soil and forests on steppe lands north of Kiev, Chernobyl achieved global notoriety in 1986 when technicians carried out an experiment aimed at testing backup electrical supplies to one of the plant's four reactors.
In Africa a mix of species, mainly antelopes, ranged tropical savannas and subdeserts and the temperate Highveld grasslands of South Africa in uncounted millions, while in Asia gazelles and their allies were equally abundant on steppe and subdesert.
As a result, Eurasia's two great pastoral traditions Semitic in the south, Indo-European, Turkish, and Mongol in the north met and mingled in Asia Minor and on steppe lands south of the Caucasus and therefore shared common traditions.
Particularly little is known about the impact of fragmentation on steppe plants.
We focused on steppe habitats of Oregon in the Prineville District boundary of the U.S. Department of Interior's Bureau of Land Management.
The section on Steppe Regions, which comprises about half of the volume, consists of largely descriptive chapters, each on a different country in which steppe environments are present.
This concentration of breeding bustards on steppe habitat around modified pastures may partly result from the species' lekking system.
