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Ecological Principles Ecology The Scope of Ecology Population ...

Ecological Principles Ecology The Scope of Ecology Population ...

MutualismEcological SuccessionThe progressive change in thespecies composition of anecosystem.Ecological SuccessionBare SubstrateColonizing StageSuccessionist StageClimax StageEcological SuccessionPrimary ProductivityPrimary SuccessionVersusSecondary Succession• Photosynthesis– Involves the use of light energy in theconversion of inorganic carbon intoorganic carbon.– Photosynthetic organisms include:terrestrial plants, seaweeds,phytoplankton, blue-green algae, andzooxanthellae.6

Primary Productivity• Chemosynthesis– Involves the use of energy released bythe catalysis of certain inorganicreaction to convert inorganic carboninto organic carbon.– Chemosynthetic organisms include:hydrothermal vent bacteria.Primary Productivity• Gross Primary Productivity (GP)– The rate of production of organic matter frominorganic materials by autotrophic organisms• Respiration (R)– The rate of consumption of organic matter(conversion to inorganic matter) by organisms.• Net Primary Productivity (NP)– The net rate of organic matter produced as aconsequence of both GP and R.Primary ProductivityPrimary Productivity of DifferentEcosystemsNP = GP + RNote that R is a negative value because itresults in the reduction of organicmatter.Energy and Materials ThroughEcosystemsEnergy Useby anHerbivore7

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