By Michael Allaby
From acid rain, CFC's, and the greenhouse influence to the food-chain and the gene financial institution, Oxford's completely revised Dictionary of Ecology, moment variation presents 5,000 updated entries on all features of ecology and the environmental sciences. providing direct entry to the main actual and up to date details on hand, the dictionary covers an unlimited variety of topics, from plant and animal body structure, animal habit, evolution, environmental pollutants, and conservation to climatology, meteorology, geomorphology, and oceanography. The Dictionary of Ecology, moment version, has been totally up-to-date to include advancements during this swiftly evolving box, quite within the parts of molecular ecology, conservation, and the administration of habitats. additionally integrated are biographical notes on eminent ecologists and different scientists, in addition to beneficial cross-references that make this quantity a useful reference device for college students, pros, and someone with an curiosity within the wildlife and the environment.
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Additional info for A Dictionary of Ecology (Oxford Paperback Reference)
This is one of the processes leading to *speciation, since there will be a restriction in the movement of genes between groups thus separated, and changes in gene frequencies may occur, owing to local selection or drift, until eventually the groups may be so divergent that reproductive barriers exist. ecological niche See NICHE.
The dry valley was eroded during an episode of surface drainage, perhaps due to *permafrost conditions. to greater precipitation, or to a higher *water-table. dry-weather flow See BASEFLOW. dulosis (adj. dulotic) The slave-making behaviour of certain parasitic ant species, in which the workers raid nests of other species and remove pupae. These are then reared as slaves in the nest of the dulotic ant species, and pass on foraged food to their captors. dune A land-form produced by the action of wind on unconsolidated sediment, normally sand.
Ecological indicator Any organism or group of organisms indicative of a particular environment or set of environmental conditions. For example, *lichens may be used as indicators of air *pollution and fossil assemblages as indicators of past environments. See also BIOTIC INDICES and INDICATOR SPECIES. ecological isolation The separation of groups of organisms as a result of changes in their *ecology or in the environment in which they live. This is one of the processes leading to *speciation, since there will be a restriction in the movement of genes between groups thus separated, and changes in gene frequencies may occur, owing to local selection or drift, until eventually the groups may be so divergent that reproductive barriers exist.