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.
An example of mutalism in the savanna is, the ant and the acacia tree. This an example of mutalism because, the ants use the acacia tree as shelter and a source of food by, the acacia tree produces nurtrients and protein which the ants benfit from.he acacia tree is benifiting from this relationship because, when harmful leaf eating bugs try to take advantage of the acacia tree, these ants fight of harmful bugs that could hurt the tree. Parsitism: An example of parsitism in the savanna is, the lion and the tick.