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 ambrosia beetle also attacks weakened or stressed trees, while the flatheaded western cedar borer, a buprestid beetle, poses a threat to healthy Western red cedars. These beetles eat the treesâ foliage and lay their eggs beneath the bark, causing the larvae to bore their way through the treesâ branches.