The process of eutrophication happens when natural as well as artificial nutrients, mostly nitrates and phosphates, find their way into an aquatic or terrestrial ecosystem. When these nutrients are added to a water body or soil the consequences can show up in numerous forms. One that flourishes when there is extra nutrients is the growth of the microscopic organisms known as phytoplankton (blue-green algae) in freshwater rivers and lakes. When there is an overabundance of them in a lake or river they show up as a green color on top of the water. Excessive algae bloom and weeds are two other results that can also appear when too many nutrients enter a water body.
. Nutrients from aquaculture effluents In general, waste produced by aquaculture is small quantities if compared with agriculture effluent. Increasing activities and production of aquaculture lead to environmental concern where aquaculture effluent can give negative impact to it. Aquaculture effluent mostly has phosphorus and nitrogen content. Aquaculture has contributed to environmental degradation whether visible impact such as particulate organic matter increased or chemical change such as reduction of dissolved oxygen and concentration of nitrogen and phosphorus increased in water (Troell et al., 1999).
The weeds act as a shelter for fish larvae and zooplankton, both of which eat algae and are, in turn, eaten by larger fish. Scientists have concluded that unpolluted lakes can absorb surprisingly large amounts of phosphates without uncertainty. When a fertilizer, such as a phosphate, is added more algae will grow, and consequently will the populations of zooplankton and fish. Difficulties only arise when the lake is already impure. Zooplankton are sensitive to their environment and many substances are toxic to them.
Usually plants take up these nitrates, but sometimes rain or irrigation water can leach them into groundwater" (Ward, Mary H.). Because farmers have leveled and modified fields to drain water efficiently, the runoff fertilizer often leads directly to rivers (like the stream shown in figure 1). Too much of this compound can be harmful to our rivers, lakes and oceans. When present in excess, nitrates fertilize algae and aquatic plants, depleting the oxygen and therefore threatening the fish population. The scum of algae negatively affects the water for fishing, swimming, and boating (Minnesot... ... middle of paper ... ...of a Good Thing?
Hypoxia is the condition which occurs oxygen falls below the level necessary, it usually happens in the aquatic environment. The main reason caused hypoxia is called eutrophication. It means some elements enter the water which can be as a plant nutrients, especially nitrogen and phosphorous. It caused the algae in the water get a faster reproduction, with the increasing number of algae, these algae will secrete thin blue-green or red-yellow films, and it’s seriously influenced the growth of fish. Although there are many algae, but there are not enough nutritive salt for algae living.
July 24, 2006. http://ga.water.usgs.gov/edu/characteristics.html #DOpdf. July 24, 2006. www.usace.army.mil/inet/information/usace-docs/armytm/tms- 662/entire.pdf Bacteria Growth- www.textbookofbacteriology.net/growth.html 7-24-06 Ammonia- www.certifiedaquascapecontractor.com/pond-filtration.php 7-24-06 Pond Scum- www.answers.com 7-24-06 Bacteria Specimens and Nitrogen Cycle- www.wikipedia.com 7-24-06 Effects of Blooms- www.research.myfwc.com 7-24-06
Hypoxia is the depletion of oxygen. If oxygen is taken out of the water where organisms live and breathe then they will die. Some marine life can move to different locations and obtain more oxygen. However, most marine life is immobile or slow moving and suffocates. Algae blooms are not always harmful, but when mixed
Eutrophication is the ecosystem response to an excessive richness of nutrients in an aquatic ecosystem. Normally eutrophication is a non-harmful, natural process that occurs when a body of water is aging. The natural cause of eutrophication is the run-off of nutrients from nearby soil and erosion. However a different type of eutrophication is human-caused which accelerates the aging process and creates environmental issues. When there is an excessive richness of nutrients in a body of water, algae feeds off of these nutrients and creates an algal bloom.
In an effort to explain the magnitude of the problem they use pollution and subsequently biomagnification to connect multiple trophic levels. Biomagnification occurs when an organism, which is later consumed by another, ingests a fat-soluble pollutant or pesticide. The pesticide accumulates within members of the highest trophic level with detrimental effects (as in the case of the peregrine falcons DDT accumulation caused eggshell thinning). Mota et al. 2014 indicate that freshwater ecosystems are important bioindicators because they show the affects of most environmental changes both natural and human caused.
Nutrients pollution; it’s when some waste water effect the levels of nutrients and increase it which make the water bodies have more algae and weed and this make those clean water polluted and undrinkable. If the water have too much algae this will use up all the oxygen within the water, and then this will lead for organism to die because starvation of the lack of finding oxygen. 2. Surface water pollution; includes natural water that found on earth surface such as lakes, oceans, rivers, lagoons. The natural surface water get polluted by hazard substance that comes from dissolving or mixed physical and then become from good to be drinker to surface water polluted.