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| Version | Summary | Created by | Modification | Content Size | Created at | Operation |
|---|---|---|---|---|---|---|
| 1 | Dean Liu | -- | 1130 | 2022-10-19 01:37:34 |
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Cultural eutrophication is when a flux of excess nutrients from human activity are added into a local run-off which in turns speeds up the natural eutrophication. This is caused by human activity. The problem became apparent once the green revolution and industrial revolution began in the last century. Phosphates and nitrates are the two main nutrients that cause cultural eutrophication as they enrich the water, allowing for aquatic plants such as algae to grow rapidly. Algae is prone to blooming into large quantities removing oxygen from the water generating anoxic conditions. This anoxic environment kills off any organisms in the water body and make it hard for terrestrial animals to gain access to the water for drinking. Increased competition for the added nutrients can cause potential disruption to entire ecosystems and food webs, as well as a loss of habitat and biodiversity of species. There are many ways in which nutrients are added through human activity, including, but not limited to: waste treatment plants, golf courses, fertilizing lawns, burning of fossil fuels and agricultural practices. Cultural eutrophication can occur in fresh water and salt water bodies, usually shallow waters are the most susceptible. In shallow lakes, sediments are frequently disturbed by wind-wave and resuspended, which result in huge nutrients release to overlying water As well the shallow areas are normally where the run-off reaches first and has less water to dilute the excess nutrients. This begins to cause many problems for the nearby wildlife as well as recreational activities for humans. Eutrophication restricts water use for fisheries, recreation, industry and drinking because of increased growth of undesirable algae and aquatic weeds and the oxygen shortages caused by their death and decomposition.
References
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