San Francisco estuary Essay Example | Topics and Well Written Essays - 1000 words

San Francisco estuary - Essay ExampleTherefore, the bay is very important to the people since it also contains marshes and mudflats that act as a source of food to angle in the area(Edmund,2012). Therefore, this makes fishing a key economic application in the area. The estuary has been found to support over a hundred species of fish that inhabit some(prenominal) the salty and fresh water. Apart from fish, the estuary also supports wildlife such as birds. Therefore, the estuary indeed contributes significantly to human welfare around the area. However, with time different human activities perplex posed a key threat to the bay. This is due to the negative effects that industrial, agricultural and mining activities have on the organisms that have inhabited the estuary. In addition, some(prenominal) birds and fish have been forced to move due to destruction of 80% of its marshes. Therefore, indeed different ways of restoring the estuary need to be developed (Edmund,2012). The popul ation of harvest-time rate of San Francisco was reported to be very high after the population number clocked 825, 900 people in 2012 census. The number of children born each year keeps on increasing and yet, the corresponding death rate remains very low. Therefore, with this high population growth, the number of persons demanding food also keeps on increasing each year. ... wipeout of the wetlands affects the overall balance of the ecosystem since it affects the flora and fauna in the estuary. Different food chains also become broken since degradation of the wetlands also forces some birds and mammals to migrate the area (San Francisco Bay Joint Venture, 2001). Dredging is also an issue that has been raised by the increasing population (Cohen & Laws, 2012). Dredging leads to increased dumping of the dredged sediments thus, causes pollution of the estuary. Increased industrial activity also causes increased level of pollutants from the industrial wastes. Pollution has been found to be a key problem to the estuary since the year 1879. For instance, mining activities bring a astronomic number of pollutants such as mercury to the estuary. Urban runoff is also a key source of pollution to the estuary. This is because it carries with it chemicals and metals swear out from the streets. On the other hand, petroleum products also enter the estuary through spillage from motor vehicle engines and other accidental spills such as from boats and ships. Pesticides used in agriculturemay also be washed to the water thus contributing to the pollution (Cohen & Laws, 2012). On the other hand, some of the pesticides used to control weeds in the water may also grime the estuary despite being helpful. Therefore, it is indeed essential that the authorities focus on controlling pollution since it has many detrimental effects on the bay. Human demeanor indeed increases the habitat fracture because most of the reasons leading to the fracture arise from human activities (Edmund,20 12). For instance, mining, agriculture, construction and industrial activities are all activities that are caused by humans. Therefore,