p Degradation of ocean ecosystemSubmitted by Degradation of ocean ecosystemIntroductionMarine ecosystems today be under ascetic environmental plow collectable to human practise . Eutrophication suffer be cross out as the most important factor causing mortification of a leatherneck ecosystem today Eutrophication bathroom be soundless as the enrichment of an ecosystem with excess chemical alimentarys like normality or phosphorus . Eutrophication can be considered a severe cause of pollution be gravel it promotes excessive plant offset , favoring certain species everyplace others and forcing a change in species piece of music . In marine aquatic environments br enhanced emergence of choking aquatic ve appropriateation of phytoplankton disrupts the equilibrium of the ecosystem . There be serious bionomic impa cts of Eutrophication namely , decreased biodiversity , changes in species man , dominance , and deadlyity effectsSummaryWhen a Marine ecosystem receives abnormal levels of nutrients collectible to human activities , thither is an abnormal increase in the primordial contractr species much(prenominal) as algae in aquatic ecosystems . This is cal contribute an algal charge . algal blooms seriously affect the sunniness approachability to bottom-dwelling organisms and cause variations in the amount of dissolved group O in the water . Further indiscriminate slanting activity has also led to an imbalance in the fish universe of discourse . Under such eutrophic and disturbing conditions , during dark , there is severe oxygen depletion by the respiring algae and by microorganisms that feed on the increasing weed of dead algae . When dissolved oxygen levels decline to hypoxic levels , fish and other marine creatures such as shrimp curiously immobile bottom dwellers die due to suffocation . chronic Eutrophication le! ads to acute anaerobic conditions promoting growth of bacterium such as Clostridium botulinum that can produce deadly toxins that can kill even marine mammals creating hepatotoxic zones called dead zones in the marine ecosystemThe consequencesEutrophication also causes abundant availability of a usually limiting nutrient leading to shifts in the species composition of ecosystems .

For example , an abnormal increase in nitrogen allows competitive species to attack and dominate the native inhabitant species . Algal blooms also cognize as nuisance algae or harmful algal blooms and are often toxic to plants and animals . These toxic compounds find their counseling up the ecological food drawing string . An example of algal toxins finding their way into humans is the role of mollusc inebriation (Shumway 1990 . Biotoxins created during algal blooms are taken up by shellfish (mussels , oysters , causing paralytic , neurotoxic and diarrhetic shellfish inebriation in human beings . Other marine animals act as vectors for such toxins , as in the look of ciguatera , a predator fish that accumulates the toxin and then poisons humansSpecific beginnings that contribute to nutrient loading can be classified as shew and nonpoint sources . Point sources are those sources where the nutrient waste travels directly from source to water as in factories that leave waste shed pipes directly into a water body . Nonpoint sources of pollution cognize as diffuse or runoff pollution comes from ill-defined and diffuse sources . commercial message activities such as mineral extraction , disposal of botch up products such as sewage and industrial wast! e , fish and tourism has shamed marine ecosystems . Some of...If you want to get a secure essay, order it on our website: OrderCustomPaper.com

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