In plants, the percentage of solar visible light that is fixed by photosynthesis. Compare with biocentric world view and ecocentric world view.Īnthropogenic: Occurring as a result of a human influence.Īpplied ecology: The application of ecological principles to deal with economic and environmental problems.Īquaculture: The cultivation of fish and other aquatic species.Īquifer: Groundwater resources in some defined area.Īrtificial selection: The deliberate breeding of species to enhance traits that are viewed as desirable by humans.Īrtificial wetland: An engineered wetland, usually constructed to treat sewage or other organic wastes.Īspect: The direction in which a slope faces.Īssimilation efficiency: In an animal, the percentage of the energy content of ingested food that is absorbed across the gut wall. The importance and worth of everything is considered in terms of the implications for human welfare. Compare with gymnosperm.Īnthropocentric world view: This considers humans as being more worthy than other species and uniquely disconnected from nature. Compare with aerobic.Īngiosperm: Flowering plants that have their ovules enclosed within a specialized membrane and their seeds within a seedcoat. Compare with anaerobic.Īesthetic pollution: Substantially a matter of cultural values, this commonly involves images that are displeasing to many (but not necessarily all) people.Īfforestation: Establishment of a forest where one did not recently occur, as when trees are planted on agricultural land.Īge-class structure: The proportions of individuals in various age classes of a population.Īgricultural site capability: See site capability.Īgroecosystem: An ecosystem used for the production of food.Īgroforestry: The cultivation of trees in plantations, typically using relatively intensive management practices.Īlgal bloom: An event of high phytoplankton biomass.Īmmonification: Oxidation of the organically bound nitrogen of dead biomass into ammonium (NH 4+).Īnaerobic: Refers to an environment in which oxygen (O 2) is not readily available. Compare with chronic toxicity.Īerobic: Refers to an environment in which oxygen (O 2) is readily available. See also buffering capacity.Īcidification: An increasing concentration of hydrogen ions (H +) in soil or water.Īcidifying deposition: Both the wet and dry deposition of acidifying substances from the atmosphere.Īcute toxicity: Toxicity associated with short-term exposures to chemicals in concentrations high enough to cause biochemical or anatomical damages, even death. See also acidifying deposition.Īcid shock: An event of relatively acidic surface water that can occur in the springtime when the snowpack melts quickly but the ground is still frozen.Īcid sulphate soil: Acidic soil conditions caused when certain wetlands are drained and sulphide compounds become oxidized.Īcid-mine drainage: Acidic water and soil conditions that develop when sulphide minerals become exposed to the atmosphere, allowing them to be oxidized by Thiobacillus bacteria.Īcid-neutralizing capacity: The quantitative ability of water to neutralize inputs of acid without becoming acidified. Compare with precision.Īcid rain: The wet deposition only of acidifying substances from the atmosphere. Accuracy: The degree to which a measurement or observation reflects the actual value.
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