By Michael Allaby

ISBN-10: 0192800787

ISBN-13: 9780192800787

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 offers 5,000 up to date entries on all points of ecology and the environmental sciences. delivering direct entry to the main exact and updated details on hand, the dictionary covers an unlimited variety of matters, 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 quickly evolving box, relatively 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 important cross-references that make this quantity a useful reference device for college students, execs, and an individual with an curiosity within the flora and fauna and the environment.

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Previous page < previous page page_133 page_134 next page > next page > Page 134 E -eae In plant *taxonomy, the suffix used to indicate a *tribe. earthflow A flow of unconsolidated material down a hill-slope, normally resulting from an increase in pore-water pressure, which reduces the friction between particles. Flow velocities vary from slow, when behaviour is plastic, to rapid, when behaviour is more liquid, and reflect variations in water content. Dry flows may occur when an earthquake shock breaks inter-granular bonds.

Diagenesis All the changes that take place in a sediment at low temperature and pressure following deposition. With increasing temperature and pressure, diagenesis grades into metamorphism. g. sand into sandstone, or peat into coal). diageotropism A tropic response (see TROPISM) of a plant organ in which it takes up a position at right angles to the direction of the force of gravity. diagnostic horizon A soil layer that contains a combination of characteristics typical of that kind of soil. dialect *Vocalizations among a *population of animals that differ from those of another population of the same species, There are many dialects in bird-song.

Dormancy (hypobiosis) A resting condition with reduced metabolic rate. This is found in non-germinating seeds and non-growing buds. Dormancy is predictive if it protects the organism against adverse conditions and occurs before their onset. Predictive dormancy most commonly occurs in environments that undergo regular seasonal change; in animals it is often called *diapause, in plants innate dormancy. Consequential (secondary) dormancy commences after the onset of adverse conditions. dorsal Towards the upper surface of an organism or nearest to the back; in vertebrates nearest the spinal column.

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

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