Populations Keywords of the Populations Chapter in Unit 4 Biology. 4.5 / 5 based on 4 ratings ? BiologyEcology, ecosystems and environmental biologyA2/A-levelAQA Created by: AjayCreated on: 07-01-13 19:53 Ecosystem a group of interrelated organisms and their physical environment in a particular area 1 of 8 Habitat the part of an ecosystem where organisms live 2 of 8 Population all organisms of one species living in a particular habitat 3 of 8 Community all populations of all the species that live together in a particular ecosystem or habitat 4 of 8 Abiotic factors the non living, physical conditions in an ecosystem 5 of 8 Biotic factors the effects of the activities of living organisms on other organisms 6 of 8 Ecological niche the way of life of a particular species in a habitat 7 of 8 Mark-release-recapture calculation (number in sample 1 x number in sample 2) ÷ number of marked animals in sample 2 = total number of animals in population. 8 of 8
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