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https://hdl.handle.net/10419/18994
Kompletter Metadatensatz
DublinCore-Feld | Wert | Sprache |
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dc.contributor.author | Christiaans, Thomas | en |
dc.contributor.author | Christiaans, Thomas | en |
dc.contributor.author | Pethig, Rüdiger | en |
dc.date.accessioned | 2009-01-28T15:54:19Z | - |
dc.date.available | 2009-01-28T15:54:19Z | - |
dc.date.issued | 2005 | - |
dc.identifier.uri | http://hdl.handle.net/10419/18994 | - |
dc.description.abstract | In 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 |
dc.language.iso | eng | en |
dc.publisher | |aCenter for Economic Studies and ifo Institute (CESifo) |cMunich | en |
dc.relation.ispartofseries | |aCESifo Working Paper |x1530 | en |
dc.subject.jel | Q20 | en |
dc.subject.ddc | 330 | en |
dc.subject.keyword | species | en |
dc.subject.keyword | growth | en |
dc.subject.keyword | extinction | en |
dc.subject.keyword | predator-prey relations | en |
dc.subject.keyword | resource competition | en |
dc.subject.stw | Erneuerbare Ressourcen | en |
dc.subject.stw | Bioökonomik | en |
dc.subject.stw | Mikroökonomische Fundierung | en |
dc.subject.stw | Theorie | en |
dc.subject.stw | Räuber-Beute Modell | en |
dc.title | A micro-level 'consumer approach' to species population dynamics | - |
dc.type | Working Paper | en |
dc.identifier.ppn | 500838720 | en |
dc.rights | http://www.econstor.eu/dspace/Nutzungsbedingungen | en |
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