Ecosystem - self supporting system of organisms interacting with each other and their environment Interactions include:
- Competition for resources (e.g. food, space, water)
Every species occupies a different niche (how the species functions in it's habitat)
If a species tries to occupy the same niche then they will compete, one will outcompete the other. the availability of resources affects Population size is dependent on
Main biotic (living) factors = competition & predation: -Interspecific -> competition between different species -Intraspecific -> competition between same species
Main abiotic (non living) factors: -CO₂ concentration, Mineral ion availability, Light intensity ( all plant populations only)
-Water availability and Temperature -> both animal and plant populations
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