Any biotic or abiotic factor that restricts the existence, numbers, reproduction, or distribution of organisms.
The power or capacity of an organism to tolerate unfavorable environmental conditions.
The gradual and orderly process of change in an ecosystem brought about by the progressive replacement of one community by another until a stable climax is established.
The establishment of a community in an area that does not have any topsoil.
A relatively stable long-lasting community reached in a successional series; usually determined by climax and soil type.
Succession following a disturbance that destroys a community without destroying the soil.
The meteorological conditions: temperature and wind and clouds and precipitation.
The angular distance between an imaginary line around a heavenly body parallel to its equator and the equator itself.
The weather in some location averaged over some long period of time.
A vast treeless plain in the arctic regions between the ice cap and the tree line.
A broad band of mixed coniferous and deciduous trees that stretches across northern North America.
A biome located throughout midlatitude regions where there is sufficient moisture to support the growth of large, broadleaf deciduous trees.
Land covered with trees.
Land where grass or grasslike vegetation grows and is the dominant form of plant life.
A region of little rainfall where few plants and animals live.
Also a type of grassland. The temperature tends to stay between 25 and 30 degrees Celsius. It rains more than deserts but less than tropical dry forests.
Tropical Seasonal Forest
Biome characterized by deciduous and evergreen trees, a dry season, and animal species that include monkeys, elephants, and Bengal tigers.
Tropical Rain Forest
A rain forest in a tropical area.
Solid rock or mineral fragments transported and deposited by wind, water, gravity, or ice, precipitated by chemical reactions, or secreted by organisms, and that accumulates as layers in loose, unconsolidated form.
The region of the shore of a lake or sea , ocean.
Area in a freshwater habitat away from the shore but still close to the surface.
The aggregate of small plant and animal organisms that float or drift in great numbers in fresh or salt water.
Deep-water areas with no light penetration.
Ecosystems of several types in which vegetation is surrounded by stand water during part of the year.
A habitat in which the fresh water of a river meets the salt water of the ocean.
The portion of the shoreline that lies between the high and low tide lines.
Portion of the marine biome that is shallow enough for sunlight to penetrate.
The part of an ocean or lake beneath the photic zone, where light does not penetrate sufficiently for photosynthesis to occur.
The bottom region of oceans and bodies of fresh water.
The portion of the ocean floor where light does not penetrate and where temperatures are cold and pressures intense.