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Community level systems
Revision and exam practice for Community level systems.
10
Objectives
10
Flashcards
10
Questions
80 min
Study time
OcrGcseBiology A GatewayCommunity level systems
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10 objective pages available
Material Cycling in Ecosystems1 objectives
- Retrieve and apply knowledge of many different materials cycle through the abiotic and biotic components of an ecosystem.
The Role of Microorganisms in Ecosystem Material Cycles1 objectives
- Account for the role of microorganisms in the cycling of materials through an ecosystem.
The Vital Roles of the Carbon and Water Cycles for Life1 objectives
- Account for the importance of the carbon cycle and the water cycle to living organisms.
Factors Affecting the Rate of Decomposition1 objectives
- Account for the effect of factors such as temperature, water content, and oxygen availability on rate of decomposition.
Levels of Organisation in an Ecosystem1 objectives
- Communicate the key features of different levels of organisation in an ecosystem from individual organisms to the whole ecosystem.
How Abiotic and Biotic Factors Influence Communities1 objectives
- Account for the way abiotic and biotic factors can affect communities.
Interdependence and Competition in Ecological Communities1 objectives
- Communicate the key features of the importance of interdependence and competition in a community.
Trophic Levels in Ecosystems1 objectives
- Communicate the key features of the differences between the trophic levels of organisms within an ecosystem.
Pyramids of Biomass and Energy Transfer1 objectives
- Communicate the key features of pyramids of biomass and explain, with examples, how biomass is lost between the different trophic levels.
Efficiency of Biomass Transfer in Food Chains1 objectives
- Work out the efficiency of biomass transfers between trophic levels and explain how this affects the number of trophic levels in a food chain.
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Practice preview
- Which statement correctly describes the difference between primary and secondary consumers?
- What is the primary role of organisms at the first trophic level in an ecosystem?
- Explain how both interdependence and competition are important in shaping an ecological community. Describe the likely impact on a food web if a key species is removed in a highly interdependent community. [6 marks]
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