36 terms

ECOLOGY

STUDY
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Terms in this set (...)

Biosphere
part of Earth in which life exists including land, water, and air or atmosphere
Biomes
Large geographic areas that have similar climates and ecosystems
Ecosystems
All the living (biotic factors) and non-living things (abiotic factors)that interect in an area.
Biotic factors
Living parts of an ecosystem
Abiotic factors
nonliving parts of an ecosystem
Food Chain
A series of steps in which organisms transfer energy by eating and being eaten
Food Web
a diagram that shows the feeding relationships between organisms in an ecosystem
Autotrophs
Organisms that make their own food
Heterotrophs
Organisms that obtain food by consuming other living things. Consumers
Primary Producers
autotrophs
organisms that can perform photosynthesis or chemosynthesis
Primary Consumers
this category includes organisms that consume producers (plants and algae). Hervibores
Hervibores
An organism that eats plants
Detritivores
Organisms that eat dead organic matter
Omnivores
Eat both plants and animals
Phytoplankton
photosynthetic algae found near the surface of the ocean
Zooplankton
small free-floating animals that form part of plankton
Moraine
piles of rocky debris left by melting glaciers
Ravines
a deep, narrow valley in the earth's surface worn by water
Ecology
the study of how organisms interact with their environment
Food Pyramid
A model that shows the loss of energy from one trophic level to another
Biomass
total amount of living tissue within a given trophic level
Photosynthesis
The process by which a cell captures energy in sunlight and uses it to make food
Trophic Cascade
when a top predator influences the density of species at all trophic levels below it
Symbiosis
A relationship in which two different organisms live in close association with each other
Mutualism
A relationship between two species in which both species benefit
Commensalism
one species benefits and the other is neither helped nor harmed
Parasitism
Symbiotic relationship in which one organism benefits at the expense of another organism.
Competition
Ecological relationship in which two organisms attempt to obtain the same resource.
Ecological relationship in which two organisms attempt to obtain the same resource.
Predation
An interaction in which one organism kills another for food.
Decomposition
A chemical reaction that breaks down compounds into simpler products.
Weathering
The breaking down of rocks and other materials on the Earth's surface.
Fossil fuels
Coal, oil, natural gas, and other fuels that are ancient remains of plants and animals.
Coal
forms when heat and pressure transform plant material over millions of years
Global Warming
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Prokaryotes
Cells that do not contain nuclei
Bacteria
Single-celled organisms that do not have a nucleus.

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