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.
A nonliving condition or thing, as climate or habitat, that influences or affects an ecosystem and the organisms in it. The abiotic factors of the tropical savanna of Africa are fire, soil, air ,water, and climate.Fire because without it the savanna would just end up being a tropical forest. Soil is important because without soil plants would grow and the vegitarian animals would die messing up the whole food chain. living thing, as an animal or plant, that influences or affects an ecosystem. Some biotic factors of the tropical savanna are: Giraffes, elephants, zebra, lion, gazelle, and emu.