Extent of temperate grasslands, savannas and shrublands
Temperate grasslands, savannas, and shrublands are terrestrialbiomes defined by theWorld Wide Fund for Nature.[1] The predominantvegetation in these biomes consists ofgrass and/orshrubs. Theclimate istemperate and ranges fromsemi-arid to semi-humid. The habitat type differs from tropical grasslands in the annual temperature regime and the types of species found here.[1]
The habitat type is known asprairie in North America,pampas in South America,veld in Southern Africa andsteppe in Asia. Generally speaking, these regions are devoid of trees, except forriparian or gallery forests associated with streams and rivers.[1]
Steppes/shortgrass prairies are short grasslands that occur in semi-arid climates.Tallgrass prairies are tall grasslands in higher rainfall areas.Heaths andpastures are, respectively, low shrublands and grasslands where forest growth is hindered by human activity but not the climate.
Temperatesavannahs, found inSouthern South America, parts ofWest Asia,South Africa andsouthern Australia, and parts of the United States, are a mixed grassywoodland ecosystem defined by trees being reasonably widely spaced so that thecanopy does not close, much like subtropical and tropical savannahs, albeit lacking a year-round warm climate.[3] In many savannas, tree densities are higher and are more regularly spaced than in forests.[4]
The states of the Eurasian steppes and the North AmericanGreat Plains have been largely extirpated through conversion to agriculture. Nonetheless, as many as 300 different plant species may grow on less than three acres of North American tallgrass prairie, which also may support more than 3 million individual insects per acre. ThePatagonian Steppe and Grasslands are notable for distinctiveness at the generic and familial levels in various taxa.[1]
Temperate grasslands, savannas, and shrublands ecoregions
^Hilbig, W (1995).The vegetation of Mongolia. Amsterdam: SPB Academic Press.
^Manoel Cláudio da Silva Jánior, Christopher William Fagg, Maria Cristina Felfili, Paulo Ernane Nogueira, Alba Valéria Rezende, and Jeanine Maria Felfili 2006 "Chapter 4. Phytogeography of Cerrado Sensu Stricto and Land System Zoning in Central Brazil" in "Neotropical Savannas and Seasonally Dry Forests: Plant Diversity, Biogeography, and Conservation" R. Toby Pennington, James A. Ratter (eds) 2006 CRC Press