Objectives to study for this test.
The notes for these can be found in the four booklets that you have completed on the ecosystem.
1 Biotic components of the ecosystem
2 Energy Transfer through the ecosystem
3 Biogeochemical Cycles
4 Ecosystem Glossary and Study guide (found on this page)
Earth systems/cycles in nature
- differences in geographical and physical conditions result in a wide variety of ecosystems
- abiotic factors, including temperature, pH, salinity, light, water and atmospheric gases, impact on the survival of organisms within the environment
- there is interaction between organisms, biological communities and the abiotic environment in which they live
- the biotic components of an ecosystem transfer and transform energy, originating primarily from the sun, into biomass
- biotic components interact with abiotic components to facilitate biogeochemical cycling
- producers, consumers and decomposers have a role in the transfer of energy in an ecosystem
- food chains and food webs show the feeding relationships between organisms within a community
- the amount of energy transferred between trophic levels in food chains and food webs diminishes as the trophic level increases - only 10% of energy is passed to the next trophic level.
Review Documents for the Ecosystem Topic Test on Friday 1 April
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