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Simplifying a physi...
Simplifying a physiologically structured population model to a stage-structured biomass model.
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- De Roos, André M (author)
- Institute for Biodiversity and Ecosystem Dynamics, University of Amsterdam, P.O.Box 94084, 1090 GB Amsterdam, The Netherlands
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- Schellekens, Tim, 1978- (author)
- Umeå universitet,Institutionen för ekologi, miljö och geovetenskap
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- Van Kooten, Tobias (author)
- Umeå universitet,Institutionen för ekologi, miljö och geovetenskap
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- Van De Wolfshaar, Karen (author)
- Institute for Biodiversity and Ecosystem Dynamics, University of Amsterdam, P.O.Box 94084, 1090 GB Amsterdam, The Netherlands
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- Claessen, David (author)
- Institute for Biodiversity and Ecosystem Dynamics, University of Amsterdam, P.O.Box 94084, 1090 GB Amsterdam, The Netherlands
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- Persson, Lennart (author)
- Umeå universitet,Institutionen för ekologi, miljö och geovetenskap
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Institute for Biodiversity and Ecosystem Dynamics, University of Amsterdam, PO.Box 94084, 1090 GB Amsterdam, The Netherlands Institutionen för ekologi, miljö och geovetenskap (creator_code:org_t)
- Elsevier Inc. 2008
- 2008
- English.
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In: Theoretical Population Biology. - : Elsevier Inc.. - 0040-5809 .- 1096-0325. ; 73:1, s. 47-62
- Related links:
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http://www.ncbi.nlm....
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- We formulate and analyze an archetypal consumer-resource model in terms of ordinary differential equations that consistently translates individual life history processes, in particular food-dependent growth in body size and stage-specific differences between juveniles and adults in resource use and mortality, to the population level. This stage-structured model is derived as an approximation to a physiologically structured population model, which accounts for a complete size-distribution of the consumer population and which is based on assumptions about the energy budget and size-dependent life history of individual consumers. The approximation ensures that under equilibrium conditions predictions of both models are completely identical. In addition we find that under non-equilibrium conditions the stage-structured model gives rise to dynamics that closely approximate the dynamics exhibited by the size-structured model, as long as adult consumers are superior foragers than juveniles with a higher mass-specific ingestion rate. When the mass-specific intake rate of juvenile consumers is higher, the size-structured model exhibits single-generation cycles, in which a single cohort of consumers dominates population dynamics throughout its life time and the population composition varies over time between a dominance by juveniles and adults, respectively. The stage-structured model does not capture these dynamics because it incorporates a distributed time delay between the birth and maturation of an individual organism in contrast to the size-structured model, in which maturation is a discrete event in individual life history. We investigate model dynamics with both semi-chemostat and logistic resource growth.
Keyword
- Biomass
- Body Size
- Food
- Humans
- Models; Biological
- Models; Statistical
- Mortality
- Population Dynamics
- Reproduction
Publication and Content Type
- ref (subject category)
- art (subject category)
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