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A Dictionary of Ecology (Oxford Paperback Reference) by Michael Allaby

By Michael Allaby

From acid rain, CFC's, and the greenhouse impact to the food-chain and the gene financial institution, Oxford's completely revised Dictionary of Ecology, moment version presents 5,000 updated entries on all points of ecology and the environmental sciences. delivering direct entry to the main exact and updated info to be had, the dictionary covers an unlimited diversity of topics, from plant and animal body structure, animal habit, evolution, environmental toxins, and conservation to climatology, meteorology, geomorphology, and oceanography. The Dictionary of Ecology, moment version, has been absolutely up-to-date to include advancements during this quickly evolving box, fairly within the components of molecular ecology, conservation, and the administration of habitats. additionally integrated are biographical notes on eminent ecologists and different scientists, in addition to precious cross-references that make this quantity a useful reference device for college kids, execs, and an individual with an curiosity within the wildlife and the environment.

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E. radially symmetrical) occur predominantly as part of the marine *plankton. There are more than 10000 species. See DIATOMACEOUS EARTH; DIATOMITE; and DIATOM OOZE. g. , and under the name 'kieselguhur' as a vehicle for explosives. Vast deposits of diatomaceous earth (called '*diatomite') are mined at Lompoc, California. diatomite A diatom-rich *sediment, which has been laid down in a lacustrine or deep-sea environment. The diatom cell wall is made from silica, therefore the sediment is siliceous.

Du Toit. James Alexander Logie (1878-1948)A South African geologist who made field studies of the provinces of *Gondwana and found extensive evidence for *continental drift. He published his ideas in Our Wandering Continents: An Hypothesis of Continental Drift (1937). dysgenic Genetically deleterious. dysphotic zone The region of the *photic zone that lies below the *compensation level, and within which light penetration is such that oxygen production by photosynthesis is exceeded by oxygen consumption by respiration.

Range) within which a taxon or other group of organisms occurs. 2. The arrangement of organisms within an area. g. a *depression or *trough). g. the equatorial easterlies, the prevailing westerlies over middle latitudes, and the *trade winds). diurnal 1. During daytime (as opposed to nocturnal), as applied to events that occur only during daylight hours or to species that are active only in daylight. 2. At daily intervals, as applied to such daily rhythms as the normal pattern of waking and sleeping, leaf or flower opening and closing, or the characteristic rise and fall of temperature associated with the hours of light and darkness.

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