Extent of the ecosystem
Arid regions of the temperate zone
Warm semi-desert scrub (creosote bush),
Cool semi-desert (Artemisia, Atriplex,
Juniperus occidentalis in Oregon grassland
Savannas are ecosystems with a continuous grass layer
and scattered trees or shrubs.
UNESCO classification, savanna is less than 10% tree cover
(10% to 40% cover is open woodland)
What is thornscrub?
Woody plant communities, spiny, drought
Where does it occur?
S. Texas, S. Arizona foothills, coastally in NW
and NE Mexico. Where desert environment is
modified by nearness to ocean or where