释义 |
eutrophicationenUK
eu·troph·ic E0245000 (yo͞o-trŏf′ĭk, -trō′fĭk)adj. Rich in mineral and organic nutrients that promote a proliferation of algae and aquatic plants, resulting in a reduction of dissolved oxygen. Used of a lake or pond. [From Greek eutrophos, well-nourished : eu-, eu- + trephein, to nourish.] eu·troph′i·ca′tion n.eu′tro·phy (yo͞o′trə-fē) n.eutrophication (juːˌtrɒfɪˈkeɪʃən) n (Environmental Science) a process by which pollution from such sources as sewage effluent or leachate from fertilized fields causes a lake, pond, or fen to become overrich in organic and mineral nutrients, so that algae and cyanobacteria grow rapidly and deplete the oxygen supplyeutrophicationThe over-enrichment of water by nutrients (e.g. from chemical fertilizer or sewage), causing overgrowth and decay of plants, deoxygenation of water, and the death of its organisms.ThesaurusNoun | 1. | eutrophication - excessive nutrients in a lake or other body of water, usually caused by runoff of nutrients (animal waste, fertilizers, sewage) from the land, which causes a dense growth of plant life; the decomposition of the plants depletes the supply of oxygen, leading to the death of animal life; "he argued that the controlling factor in eutrophication is not nitrate but phosphate"biological process, organic process - a process occurring in living organisms | TranslationsευτροφισμόςeutrophisationeutrophicationenUK
eutrophication (yo͞otrō'fĭkā`shən), aging of a lake by biological enrichment of its water. In a young lake the water is cold and clear, supporting little life. With time, streams draining into the lake introduce nutrients such as nitrogen and phosphorus, which encourage the growth of aquatic organisms. As the lake's fertility increases, plant and animal life burgeons, and organic remains begin to be deposited on the lake bottom. Over the centuries, as silt and organic debris pile up, the lake grows shallower and warmer, with warm-water organisms supplanting those that thrive in a cold environment. Marsh plants take root in the shallows and begin to fill in the original lake basin. Eventually the lake gives way to bogbog, very old lake without inlet or outlet that becomes acid and is gradually overgrown with a characteristic vegetation (see swamp). Peat moss, or sphagnum, grows around the edge of the open water of a bog (peat is obtained from old bogs) and out on the surface. ..... Click the link for more information. , finally disappearing into land. Depending on climate, size of the lake, and other factors, the natural aging of a lake may span thousands of years. However, pollutants from man's activities can radically accelerate the aging process. During the past century, lakes in many parts of the earth have been severely eutrophied by sewage and agricultural and industrial wastes (see water pollutionwater pollution, contamination of water resources by harmful wastes; see also sewerage, water supply, pollution, and environmentalism. Industrial Pollution ..... Click the link for more information. ). The prime contaminants are nitrates and phosphates, which act as plant nutrients. They overstimulate the growth of algae, causing unsightly scum and unpleasant odors, and robbing the water of dissolved oxygen vital to other aquatic life. At the same time, other pollutants flowing into a lake may poison whole populations of fish, whose decomposing remains further deplete the water's dissolved oxygen content. In such fashion, a lake can literally choke to death.eutrophication[yü·trə·fə′kā·shən] (ecology) The process by which a body of water becomes, either by natural means or by pollution, excessively rich in dissolved nutrients, resulting in increased primary productivity that often leads to a seasonal deficiency in dissolved oxygen. eutrophicationenUK
eutrophication [u″tro-fĭ-ka´shun] the accidental or deliberate promotion of excessive growth (multiplication) of one kind of organism to the disadvantage of other organisms in the same ecosystem.eutrophication (ū-trŏf″ĭ-kā′shŭn) [Gr. eutrophein, to thrive] Alteration of the environment by increasing the nutrients required by one species to the disadvantage of other species in the ecosystem, esp. in an aquatic environment.eutrophication a process by which pollutants cause a body of water to become over-rich in organic and mineral nutrients, so that algae, CYANOBACTERIA and other microorganisms grow rapidly and deplete the oxygen supply.eutrophicationenUK
Words related to eutrophicationnoun excessive nutrients in a lake or other body of water, usually caused by runoff of nutrients (animal waste, fertilizers, sewage) from the land, which causes a dense growth of plant lifeRelated Words- biological process
- organic process
|