Representing the acquisition and use of energy by individuals in agent-based models of animal populations

Richard M. Sibly, Volker Grimm, Benjamin T. Martin, Alice S A Johnston, Katarzyna Kulakowska, Christopher J. Topping, Peter Calow, Jacob Nabe-Nielsen, Pernille Thorbek, Donald L. Deangelis

Research output: Contribution to journalArticle

62 Citations (Scopus)

Abstract

Agent-based models (ABMs) are widely used to predict how populations respond to changing environments. As the availability of food varies in space and time, individuals should have their own energy budgets, but there is no consensus as to how these should be modelled. Here, we use knowledge of physiological ecology to identify major issues confronting the modeller and to make recommendations about how energy budgets for use in ABMs should be constructed. Our proposal is that modelled animals forage as necessary to supply their energy needs for maintenance, growth and reproduction. If there is sufficient energy intake, an animal allocates the energy obtained in the order: maintenance, growth, reproduction, energy storage, until its energy stores reach an optimal level. If there is a shortfall, the priorities for maintenance and growth/reproduction remain the same until reserves fall to a critical threshold below which all are allocated to maintenance. Rates of ingestion and allocation depend on body mass and temperature. We make suggestions for how each of these processes should be modelled mathematically. Mortality rates vary with body mass and temperature according to known relationships, and these can be used to obtain estimates of background mortality rate. If parameter values cannot be obtained directly, then values may provisionally be obtained by parameter borrowing, pattern-oriented modelling, artificial evolution or from allometric equations. The development of ABMs incorporating individual energy budgets is essential for realistic modelling of populations affected by food availability. Such ABMs are already being used to guide conservation planning of nature reserves and shell fisheries, to assess environmental impacts of building proposals including wind farms and highways and to assess the effects on nontarget organisms of chemicals for the control of agricultural pests.

Original languageEnglish
Pages (from-to)151-161
Number of pages11
JournalMethods in Ecology and Evolution
Volume4
Issue number2
DOIs
StatePublished - Feb 1 2013

Fingerprint

energy budget
animal models
body temperature
body mass
energy
nontarget organism
mortality
wind farm
individual-based model
animal
conservation planning
nature reserve
food availability
modeling
forage
environmental impact
fishery
shell
road
ecology

Keywords

  • Bioenergetics
  • Energy budget
  • Individual-based models
  • Population dynamics

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Ecological Modeling

Cite this

Sibly, R. M., Grimm, V., Martin, B. T., Johnston, A. S. A., Kulakowska, K., Topping, C. J., ... Deangelis, D. L. (2013). Representing the acquisition and use of energy by individuals in agent-based models of animal populations. Methods in Ecology and Evolution, 4(2), 151-161. https://doi.org/10.1111/2041-210x.12002

Representing the acquisition and use of energy by individuals in agent-based models of animal populations. / Sibly, Richard M.; Grimm, Volker; Martin, Benjamin T.; Johnston, Alice S A; Kulakowska, Katarzyna; Topping, Christopher J.; Calow, Peter; Nabe-Nielsen, Jacob; Thorbek, Pernille; Deangelis, Donald L.

In: Methods in Ecology and Evolution, Vol. 4, No. 2, 01.02.2013, p. 151-161.

Research output: Contribution to journalArticle

Sibly, RM, Grimm, V, Martin, BT, Johnston, ASA, Kulakowska, K, Topping, CJ, Calow, P, Nabe-Nielsen, J, Thorbek, P & Deangelis, DL 2013, 'Representing the acquisition and use of energy by individuals in agent-based models of animal populations', Methods in Ecology and Evolution, vol. 4, no. 2, pp. 151-161. https://doi.org/10.1111/2041-210x.12002
Sibly, Richard M. ; Grimm, Volker ; Martin, Benjamin T. ; Johnston, Alice S A ; Kulakowska, Katarzyna ; Topping, Christopher J. ; Calow, Peter ; Nabe-Nielsen, Jacob ; Thorbek, Pernille ; Deangelis, Donald L. / Representing the acquisition and use of energy by individuals in agent-based models of animal populations. In: Methods in Ecology and Evolution. 2013 ; Vol. 4, No. 2. pp. 151-161.
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