Please use this identifier to cite or link to this item: http://hdl.handle.net/10419/18994
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dc.contributor.authorChristiaans, Thomasen_US
dc.contributor.authorChristiaans, Thomasen_US
dc.contributor.authorPethig, Rüdigeren_US
dc.date.accessioned2009-01-28T15:54:19Z-
dc.date.available2009-01-28T15:54:19Z-
dc.date.issued2005en_US
dc.identifier.urihttp://hdl.handle.net/10419/18994-
dc.description.abstractIn this paper we develop a micro ecosystem model whose basic entities are representativeorganisms which behave as if maximizing their net offspring under constraints. Net offspringis increasing in prey biomass intake, declining in the loss of own biomass to predators andAllee's Law applies. The organism's constraint reflects its perception of how scarce its ownbiomass and the biomass of its prey is. In the short-run periods prices (scarcity indicators)coordinate and determine all biomass transactions and net offspring which directly translatesinto population growth functions. We are able to explicitly determine these growth functionsfor a simple food web when specific parametric net offspring functions are chosen in themicro-level ecosystem model. For the case of a single species our model is shown to yield thewell-known Verhulst-Pearl logistic growth function. With two species in predator-preyrelationship, we derive differential equations whose dynamics are completely characterizedand turn out to be similar to the predator-prey model with Michaelis-Menten type functionalresponse. With two species competing for a single resource we find that coexistence is aknife-edge feature confirming Tschirhart's (2002) result in a different but related model.en_US
dc.language.isoengen_US
dc.publisher|aCenter for Economic Studies and Ifo Institute (CESifo) |cMunichen_US
dc.relation.ispartofseries|aCESifo Working Paper |x1530en_US
dc.subject.jelQ20en_US
dc.subject.ddc330en_US
dc.subject.keywordspeciesen_US
dc.subject.keywordgrowthen_US
dc.subject.keywordextinctionen_US
dc.subject.keywordpredator-prey relationsen_US
dc.subject.keywordresource competitionen_US
dc.subject.stwErneuerbare Ressourcenen_US
dc.subject.stwBioökonomiken_US
dc.subject.stwMikroökonomische Fundierungen_US
dc.subject.stwTheorieen_US
dc.subject.stwRäuber-Beute Modellen_US
dc.titleA micro-level 'consumer approach' to species population dynamicsen_US
dc.typeWorking Paperen_US
dc.identifier.ppn500838720en_US
dc.rightshttp://www.econstor.eu/dspace/Nutzungsbedingungen-

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