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.
âThe main threats to lemurs are the same â mainly habitat destruction,â he says. âMadagascar has lost at least 80% of its original forest cover since human arrival.â. âItâs mainly slash and burn agriculture in Madagascar... which means chopping down a bit of forest, burning the trees, planting rice on the fertile soil.