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Ecology

Contributors in Ecology

Ecology

French drain

Biology; Ecology

A pipeless drain set in a buried channel of gravel to drain off excess water behind walls. Invented in Concord by Henry French.

gneiss

Biology; Ecology

A coarse, metamorphosed, foliated (laminated) rock in which feldspars and quartz, sometimes hornblende and mica, run in bands.

r-selection

Biology; Ecology

Rapid growth and occupation through early reproduction, short life spans, low biomass, and lots of offspring. See K-Selection.

sandstone

Biology; Ecology

A soft sedimentary rock composed of feldspar and weathered quartz grains. Porous sandstone layers often hold water in aquifers.

Second Law of Thermodynamics

Biology; Ecology

Energy (usually heat) dissipates in any closed system (entropy). This is why trophic levels in a food web narrow as they rise.

eutrophication

Biology; Ecology

A gradual nutrient enrichment that increases organic matter production, as with a lake that absorbs waves of nutrient runoffs.

edge effect

Biology; Ecology

The unique properties in an ecotone (plant variety, animal density, biological diversity), the zone where two communities meet.

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