Unit 4: Populations and Ecosystems Key terms 3.5 / 5 based on 2 ratings ? BiologyEcology, ecosystems and environmental biologyA2/A-levelAQA Created by: GeorgiaCreated on: 02-01-13 14:38 Ecology The study of inter-relationships between organisms & the environment 1 of 14 Biomass The total mass of living material in a speific area at a given time without water 2 of 14 Species Diversity The number of different species and the number of induviduals of each species within one community 3 of 14 Population All organisms of one species in a habitat 4 of 14 Ecological Niche The role of a species within a habitat, e.g. what it eats, where and when it feeds 5 of 14 Microhabitat Smaller units within each habitat, each with it's own microclimate 6 of 14 Habitat A place where a communit of organisms live 7 of 14 Biosphere The layer of land, air and water that surrounds the Earth 8 of 14 Community ALL the populations of different organisms living & interacting in a particular place at the same time 9 of 14 Ecosystem A more or less self-contained functional unit for an organism to survive, reproduce & maintain a viable population 10 of 14 Biodiversity The range and variety of living organisms within a particuar area 11 of 14 Biotic An ecological factor that makes up part of the living environment of an organim 12 of 14 Adaption Features that increase an organisms chance of survival & reproduction 13 of 14 Abiotic An ecologial factor that makes up part of the non-biological environment of an organism 14 of 14
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