Ecology key word flash cards 2.0 / 5 based on 2 ratings ? BiologyEcology, ecosystems and environmental biologyA2/A-levelOCR Created by: LauraCreated on: 13-09-12 15:06 Abundance The number of individuals in a given space. 1 of 32 Bias This will invalidate any data collected 2 of 32 Biological Control The use of other living organisms to control pests (e.g ladybirds to kill flys) 3 of 32 Biomass A measure of the amount of energy in a trophic level based on the mass of the organism in an ecosystem. Mass of living material. 4 of 32 Community Is all the different organisms living and interacting in a particular habitat 5 of 32 Competition When individuals need to share resources (e.g light, food) insufficient to meet all their demands 6 of 32 Consumer An organism that eats/consumes another 7 of 32 Decomposer These break producers and consumers down releasing and recycling nutrients (e.g bacteria, fungi, earthworm) 8 of 32 Detritivore An organism such as an earthworm that eats/consumes dead/decaying matter. 9 of 32 Ecological Niche This describes exactly how an organism fits into all the biotic and abiotic aspects of their environment. 10 of 32 Ecosystem Is made up of all the interacting living (biotic) and non living components in an area. 11 of 32 Food Web A complex series of interactions within a habitat or ecosystem. 12 of 32 Habitat Where an organism lives. 13 of 32 Interspecific Means between individuals of different species 14 of 32 Intraspecific Means between individuals of the same species 15 of 32 Microhabitat A smaller habitat within a larger one 16 of 32 Pesticide Poisonous chemicals used to kill pests 17 of 32 Population is a group of interbreeding organisms of one species within a particular habitat. 18 of 32 Predation When an organism is consumed by another 19 of 32 Producer A photosynthetic organism that uses carbon dioxide and water to manufacture glucose and oxygen 20 of 32 Productivity The rate at which something is produced 21 of 32 Quadrat A grid used to mark out a specific area for sampling. 22 of 32 Quaternary consumer The 4th consumer/ the organism at the 5th trophic level 23 of 32 Succession The process by which the species inhabiting ecosystems change over time due to altering biotic and abiotic factors 24 of 32 Tertiary consumer Third level consumer that is normally a predator 25 of 32 Trophic Level The stages in a food chain 26 of 32 Pioneer community The living organisms which first begin to colonise bare ground 27 of 32 Climax community The stable community that emerges at the end of a process of succession 28 of 32 Primary succession A directional change in a community of organisms over time beginning from bare ground. 29 of 32 Seral stage A sequential phase in the development of a climax community 30 of 32 Psammosere The succession of sand dunes 31 of 32 Secondary succession A directional change in a community of organisms over time beginning from disturbed or damaged habitats 32 of 32
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