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.
One threat to these Savanna biomes is the animals which graze upon it. Other biomes such as Taiga or Rainforest have a high tree quantity which means that less grass is able to grow for animals to graze on. However, since Savannas have few trees and much wide open space than other biomes an herbaceous layer grows much easier.
Mounds. Some plants in the African savanna only grow on termite mounds since the surrounding soil is too thin or drains so poorly that it cannot sustain plants. Instead, the mounds provide the nutrients and water the plants need to survive.Mopane, also known as the turpentine tree, thrives on termite mounds.oil. The soil found on the savanna stays very porous, allowing for fast water drainage during the rainy season. The plants get most of their nutrients from a thin layer of humus made up of partially decomposed plant or animal matter. Most savannas include grasses and a few species of trees.