Energy and Ecosystems Definitions 0.0 / 5 ? BiologyEnergy and EcosystemsA2/A-levelAQA Created by: lucylizjonesCreated on: 27-11-15 16:29 Producer Photosynthetic Organisms 1 of 13 Consumer Organisms that obtain their energy from consuming other organisms 2 of 13 Primary Consumer Consumers that directly eat producers (1st in the chain) 3 of 13 Secondary Consumer Consumers that eat primary consumers (usually predators) 4 of 13 Tertiary Consumer Consumers that eat secondary consumers (usually predators) 5 of 13 Decomposer/Saprobiotic Organism Break down complex materials into single components using extra cellular digestion (fungi and bacteria) 6 of 13 Detritivore Break down complex materials into single components (earthworms) 7 of 13 Food Chain Feeding relationships in which producers are eaten by primary consumers, who are eaten by secondary consumers and these by tertiary consumers. 8 of 13 Trophic Level Each stage of the food chain/web 9 of 13 Food Web Links a single habitat and many different food chains together 10 of 13 Biomass Total mass of living material in a specific area at a given time. Usually measured as dry mass as the amount of water in an organism varies 11 of 13 Ecosystem An ecological unit that includes organisms and non living materials (soil/water) in a particular area 12 of 13 Production Equation Net Production = Gross Production-Respiratory Losses 13 of 13
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