Energy and Ecosystems 0.0 / 5 ? BiologyEcology, ecosystems and environmental biologyA2/A-levelAQA Created by: SerenMCreated on: 17-01-18 10:25 Producer Organisms that make their own food (organic molecules) e.g. plants 1 of 13 Consumer Rely on producers or other consumers as a food source e.g. animals 2 of 13 Saprobiont Break down organic molecules, providing minerals for uptake by plants/producers e.g. bacteria/fungi 3 of 13 Trophic Level Each animal level in food chain 4 of 13 The arrow in food chains Represents transfer of energy 5 of 13 Biomass Total mass of living material gm-2 or gm-3 (depends whether area or volume) 6 of 13 Calorimetry Used to estimate chemical energy store in dry mass 7 of 13 Gross Primary Production (GPP) The total quantity of chemical energy store, in plant biomass, in a given area/volume 8 of 13 Net Primary Production The chemical energy store left after losses to respiration (R) have been accounted for 9 of 13 NPP equation NPP=GPP-R 10 of 13 Net production of consumers equation N=I-(F+R) 11 of 13 The amount of energy at each level in a food chain is usually measured in... kj m-2 year-1 12 of 13 Efficiency equation Efficiency= energy available after transfer/energy available before transfer x 100 13 of 13
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