Population and Ecosystem 0.0 / 5 ? BiologyEcology, ecosystems and environmental biologyA2/A-levelAQA Created by: maryamCreated on: 12-02-15 14:42 Ecology The study of the inter relationship between the organism and their environment 1 of 11 Biosphere The layer of land, air and water that surrounds the earth 2 of 11 Ecosystem made up of the interacting abiotic and biotic features in a specific area 3 of 11 Population Group of interbreeding organisms of one species in a habitat 4 of 11 Community all the populations of different organisms living and interacting at the same place at the same time 5 of 11 Habitat Place where a community of organisms live 6 of 11 Population size for mark release recapture number of organisms in 1st sample X number of organisms in the 2nd sample/ number of marked recaptured 7 of 11 Population growth births + immigration - deaths + emmigration 8 of 11 percentage population growth pop. change/pop. at the start X 100 9 of 11 Birth rate number of births per year/ total pop. in the same year X 1000 10 of 11 Death rate number of deaths per year/ total pop. in the same year X 1000 11 of 11
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