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15 Cards in this Set

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Ecosystem
An array of species and their physical environment.
Trophic level
All organisms the same number of transfer steps away from the energy input into an ecosystem.
Food Chain
A linear flow of energy captured by primary producers (autotrophs) into ever higher trophic levels of an ecosystem.
Food web
Cross-connecting food chains.
Biological magnification
Some substance becomes more concentrated in body tissues as it moves up through food chains.
Biomass/Energy Pyramid
Primary producers trap about 1% of the solar energy that enters an ecosystem
Only ~10% is passed on to next level
All Heat in the End
At each trophic level, the bulk of the energy received from the previous level is used in metabolism
This energy is released as heat energy and lost to the ecosystem
Herbivore
Plant eater
Carnivore
Meat eater
Omnivore
Eater of animal,plant, fungi,protist,& bacteria
Water Cycle
Region from which water drains into a single stream or river.
Aquifer
Underground layer of rock that contains water (groundwater)
Salinization
Salt buildup in soil through poor drainage, evaporation, and heavy irrigation.
Carbon cycle
Movement of carbon from the atmosphere, through food webs and ocean’s waters and rocks, and back to atmosphere.
Greenhouse effect
Warming of the lower atmosphere as greenhouse gases reradiate heat energy back toward the Earth’s surface.
Global Warming
Long-term rise in the temperature of the Earth’s lower atmosphere.