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IB Biology 4.1 Ecology

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Species

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Terms in this set (19)

Groups of organisms that can potentially interbreed to produce fertile offspring

Image: Species

Groups of organisms of the same species, who live in the same area at the same time

Image: Population

Populations of different species living together and interacting with each other

Image: Community

Absorb CO2, H2O and inorganic nutrients such as nitrates from abiotic environment.➡️Synthesize carbon compounds they need. Most undergo photosynthesis

Image: Autotrophs

Can't make carbon compounds. Therefore must be digested and absorbed from diet

Image: Heterotrophs

Common decomposers. Feed on decaying matter. Obtain organic nutrients from dead organisms by external digestion.

Image: Saprotrophs

Feed on living organisms by ingestion

Image: Consumers

Obtain organic nutrients from detritus (material from living organisms e.g dead leaves or roots, decomposing animals etc) by internal digestion.

Allows energy in and out

Small experimental area set up in an ecological research programme

Image: Mesocosms

Quadrat sampling

Classic tool used in ecological research especially for biodiversity.

Image: Quadrat sampling

Abiotic Factors

non-living chemical or physical factors(ex. water, nitrogen, oxygen, salinity, pH, soil nutrients and composition, temperature, amount of sunlight, precipitation) of a system

Image: Abiotic Factors

Biological influences on organisms within an ecosystem

Image: Biotic Factors

when members of different species breed together.

Image: Crossbreeding

Inorganic nutrients

substances neccesary to sustain life that do not contain carbon: such as minerals and water

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