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San Francisco estuary - Essay Example

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The San Francisco Bay is made up of rivers and five bays thus making up a wide river mouth that is flooded by the sea during ocean tides. The mixing of the fresh and salty water brings out the complete biological importance of the estuary. …
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San Francisco estuary
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Download file to see previous pages Therefore, the bay is very important to the people since it also contains marshes and mudflats that act as a source of food to fish in the area(Edmund, 2012). Therefore, this makes fishing a key economic activity in the area. The estuary has been found to support over a hundred species of fish that inhabit both 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 have 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, both birds and fish have been forced to migrate due to destruction of 80% of its marshes. Therefore, indeed different ways of restoring the estuary need to be developed (Edmund, 2012). The population of growth 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. ...
Destruction 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 large 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 washed 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 pollute 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 behavior indeed increases the habitat fracture because; most of the reasons leading to the fracture arise from human activities (Edmund, 2012). For instance, mining, agriculture, construction and industrial activities are all activities that are caused by humans. Therefore, ...Download file to see next pagesRead More
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