Ecology

Ecology

Industrie : Biologie

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Ecology

hibernation

Biologie; Ecologie

An energy-conserving lowering of metabolism, respiration, heart rate, and body temperature while the body survives on accumulated fat supplies. See Estivation.

benthique

Biologie; Ecologie

Organisms living on the sea floor. Littoral benthos occupy the space from the high-water spring tide mark to 200 meters down. Deep sea benthos live below that.

collagène

Biologie; Ecologie

Long proteins stretched into a triple helix to make strong structural fibers. They are found in hair, tendons, and about a fourth of the human body's protein.

acre-pied

Biologie; Ecologie

The amount of water it would take to cover an acre of land to a depth of one foot: 325,851 gallons of water. The standard measure of agricultural irrigation.

spicule

Biologie; Ecologie

Pointed skeletal elements found in certain sponges and sea cucumbers and made from either silica or calcium carbonate. They provide structure and protection.

métaux lourds

Biologie; Ecologie

Elements between lead and copper in terms of the Periodic Table. Too much lead, zinc, nickel, mercury, arsenic, copper, or cadmium in soil can damage plants.

cendre volante

Biologie; Ecologie

Particules de suie powderlike produites par les usines de charbon et le pétrole. U. usines de charbon de la S. seuls produisent la plus grande partie de cent millions de tonnes de celui-ci par an.