Biology AQA Chapter 13 (Energy and Ecosystems: Key Terms) 0.0 / 5 ? BiologyEcology, ecosystems and environmental biologyA2/A-levelAQA Created by: CharliegageCreated on: 10-10-17 10:38 The ultimate source of energy in an ecosystem is the ... Sun 1 of 10 Producers Organisms that are photosynthetic and manufacture organic substances using light energy 2 of 10 Consumers Organisms that obtain their energy from the consumption of other organisms 3 of 10 Saprobiont Breaks down complex organic materials of dead organism and release back to soil (Fungi & Bacteria) 4 of 10 Food Chain Describes a feeding relationship between a set of organisms in different trophic levels 5 of 10 Food Web Most organisms have more than one food source in a habitat, and the food chains are linked together to form a food web 6 of 10 Biomass The total living material in a specific area at a given time, (dry mass used for comparisons) 7 of 10 Heat to Constant Mass Heating sample, weighing sample. Heat sample again and weigh if mass has changed repeat 8 of 10 Gross Primary Productivity (GPP) The total energy produced by a plant in a given time 9 of 10 Net Primary Productivity (NPP) The remaining energy after respiration that can be used to make biomass 10 of 10
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