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a collection of ecosystems that share similar climactic conditions and so give rise to similar vegetation patterns
made up of general weather patterns, seasons, extremes of weather (particularly temperature and precipitation)
involves the breaking down of food, often in the form of glucose, to release energy which is used in living processes
Gross Primary Productivity (GPP)
the total gain in energy or biomass per unit area per unit time by green plants
Net Primary Productivity (NPP)
the total gain in energy or biomass per unit area per unit time by green plants after allowing for losses to respiration
Gross Secondary Productivity (GSP)
the total gain in energy or biomass per unit area per unit time by consumers through absorption
Net Secondary Productivity (NSP)
the total gain in energy or biomass per unit area per unit time by consumers after allowing for losses to respiration
organisms or their products that directly or indirectly affect an organism in its environment
the position that an organism or a group of organisms in a community occupies in a food chain
when the top trophic levels take in so much of the chemical that it causes disease or death as there is less biomass for each successive trophic level
a relationship between two species in which one species lives in or on another, gaining its food from it
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