After the boom-bust-boom of the fifties and sixties, the borough went into a third and more severe decline again in the mid-1970s along with much of the Rust Belt so that population was just 2,804 at the 2000 census. Now in the 2011 Brownsville still has a handful of buildings condemened or just borded up.
Threats to Biodiversity. The primary threats to the savanna biome are humans (for example, poachers are killing elephants for their ivory tusks and hunting animals to the brink of extinction) and global climate change.
The savanna is a type of tropical biome with large stretches of grasslands mixed with sparse trees and shrubs. It is an intermediate terrain between tropical forest and desert.Not enough rain falls to support a forest biome. Climatic savannas is the term for savannas that are the result of climate conditions. Edaphic savannas are caused by soil conditions, and derived savannas are the result of forest clearing by humans.t is an intermediate terrain between tropical forest and desert. Not enough rain falls to support a forest biome. Climatic savannas is the term for savannas that are the result of climate conditions. Edaphic savannas are caused by soil conditions, and derived savannas are the result of forest clearing by humans.