Ulanowicz, Robert (1972) Mass Energy and Flow in closed ecosystems. Journal of Theoretical Biology, 34, pp. 239-253.
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The general equations of biomass and energy transfer for an n-species, closed ecosystem are written. It is demonstrated how in "ecological time" the parameters describing the dynamics of biomass transfer are related to the parameters of energy transfer, such as respiration, fixation, and energy content. This relationship is determinate for the straight-chain ecosystem, and a simple example is worked out. The results show how the density dependent terms in population dynamics arise naturally, and how the stable system exhibits a hierarchy in energy per unit biomass. A procedure is proposed for extending the theory to include webbed systems, and the particular difficulties involved in the extension are brought before the scientific community for discussion.
|Title:||Mass Energy and Flow in closed ecosystems|
|Journal or Publication Title:||Journal of Theoretical Biology|
|Page Range:||pp. 239-253|
|Issuing Agency:||University of Maryland Center for Environmental Science. Chesapeake Biological Laboratory|
|Additional Information:||UMCES (University of Maryland Center for Environmental Science) Ref. No. 476|
|Uncontrolled Keywords:||Models; energy flow; ecosystems|
|Depositing User:||Kathleen Heil|
|Date Deposited:||03 Apr 2009 02:07|
|Last Modified:||29 Sep 2011 21:51|
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