Between 1950 and 1985,half of Central America's Tropical Forests Were

Between 1950 and 1985,half of Central America's tropical forests were cut,and the remainder was scattered in small isolated fragments.Another 19 percent of the forest had disappeared by 2005.A survey of the remaining tropical forest areas would most likely show

A) increased species richness.
B) decreased species richness.
C) decreased extinction rates.
D) increased colonization rates.
E) increased primary productivity.