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

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 version presents 5,000 up to date entries on all points of ecology and the environmental sciences. providing direct entry to the main exact and up to date info to be had, the dictionary covers an enormous variety 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 totally up to date to include advancements during this quickly evolving box, really 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 priceless cross-references that make this quantity a useful reference software for college kids, execs, and an individual with an curiosity within the wildlife and our surroundings.

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The scheme is based on the original (1927) five-point cover scale of *Braun-Blanquet, but the finer subdivisions allow more detailed interpretation. See also COVER-SOCIABILITY SCALE. Donau A period of glaciation which occurred at about the beginning of the *Pleistocene. It may correspond to the Nebraskan Stage in North America. Evidence of it has largely been removed by later glacial episodes. Donau/Günz Interglacial A *Pleistocene *interglacial stage of the Alpine areas that may be equivalent to the *Waalian of northern Europe and the *Aftonian of North America.

Ecliptic The plane of the orbit of the Earth around the Sun. It forms an angle of 23º27' with the Earth's equator. 2º) and Mercury (7º). eco- A prefix derived from the Greek oikos, meaning 'house' or 'dwelling place'. ecocline (ecological gradient) A gradation from one *ecosystem to another when there is no sharp boundary between the two. It is the joint expression of associated *community (*coenocline) and complex environmental gradients. ecological amplitude The range of *tolerance of a species, diagrammatically forming a bell-shaped curve.

Dimension analysis The detailed measurement of plant dimensions in productivity studies. Control studies enable estimation of allometric (see ALLOMETRY) relationships between external dimensions and dry-matter production, so that in future studies destructive sampling is unnecessary. Dimension analysis has particular relevance to forest productivity studies and has been much used. dimictic Applied to a lake in which two seasonal periods of free circulation occur, as is typical of lakes in mid-latitude climates.

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