Snab topic 5 biology definitions 3.0 / 5 based on 1 rating ? BiologyEcology and biodiversityA2/A-levelEdexcel Created by: Fe PearsonCreated on: 26-05-14 17:29 Net primary productivity The rate at which energy is transferred into organic molecules that make up new plant biomass 1 of 21 Gross primary productivity The rate at which energy in incorporated into organic molecules by an ecosystem 2 of 21 Habitat A place with a distinct set of conditions in which an organism lives 3 of 21 Community The various populations sharing a habitat 4 of 21 Population A group of individuals of the same species found in one area 5 of 21 Niche The roleof an organism in it's habitat 6 of 21 Biotic factor Living variables in an environment which affect an organisms survival 7 of 21 Abiotic factor Non-iving variables in an environment which affect an organisms survival 8 of 21 Biosphere Partf the earth and its atmosphere that is inhabited by living organisms 9 of 21 Anthropogenic Factors factors cause by humans 10 of 21 Succession Change in a community over time 11 of 21 Climax Community The stable community as which succession no longer occurs 12 of 21 Primary succession Starts where there has never before been a community, in newly formed habitats 13 of 21 Secondary succession Starts on bare soil where the previous community had been cleared 14 of 21 Deflected succession When succession is inhibited due to human activity 15 of 21 Producers/autotrophs Organisms which can make their own organic compounds from inorganic compounds 16 of 21 Primary consumers Herbivores, eat lant material 17 of 21 Secondary consumers Eat primary consumers, carnivores 18 of 21 Trophic level Position occupied on the food chain 19 of 21 Detritivores Primary consumers which feed on anima faces and dead matter 20 of 21 Dendrochronology The study of tree rings 21 of 21
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