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Lecture XXII - Ecosystem Ecology

Lecture XXII - Ecosystem Ecology - Lecture XXII Ecosystem...

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Lecture XXII – Ecosystem Ecology
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Ecosystems Definition: an interacting system of living organisms and their physical environment An ecosystem has two components: The biotic component, the community . The abiotic component, the physical environment http://www.mghs.sa.edu.au/Internet/Faculties/Science/Year10/Pics/ecosystem.jpg
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Ecosystem Components The community is comprised of: producers or autotrophs consumers or heterotrophs, including decomposers Physical environment inorganic substances dead organic matter These components exchange energy and nutrients http://www.jamesponds.com/images/ecosystem.jpg
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Ecosystem Terminology Ecosystem : biological community and its abiotic context Standing crop : mass (usually dry) of living organisms Biomass : mass per unit area or volume, often expressed in energy units (e.g. j m -2 ) Primary (1 o ) productivity (PP) : rate (usually per year) of biomass production per unit area Gross 1 o productivity (GPP) :
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