Nat5 Biology Unit Three Life On Earth Key Area 1 Ecosystems

The total variation among living organisms within a region (rainforest, ocean, the Earth) is called it’s biodiversity

Make food using inorganic materials and an abiotic energy source e.g. green plants produce sugars from CO2 and H2O, and light energy via the process of photosynthesis

Obtain food by feeding on producers or other consumers

Only eats plant material

Only eats other animals

Eat both plants and animals

Hunts, kills, and feeds on another organism (its prey)

Is hunted, killed and fed on by other organisms (its predator)

Where an organism lives

All the members of one species living in a habitat

All the plants, animals and microorganisms living in a habitat

A group of organisms that can interbreed to produce fertile offspring

Diagram showing the feeding relationships between different organisms

Ecosystems have a large number of interconnected food chains. These are shown asa food web

Consists of all the organisms (the community) living in a particular habitat and all the non-living components with which the organisms interact

A role that’s an organism plays within a community This includes interactions with organisms (competition or predation)

When resources are in short supply

Competition between different species for one or a few of the resources they require

Competition between members of the same species for all resources

INTRAspecific competition is more intense because they are all fighting for all of the same resources