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  • Carrying capacity - A capricious construct

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    Cropp214173.pdf (2.290Mb)
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    Accepted Manuscript (AM)
    Author(s)
    Cropp, Roger
    Norbury, J
    Griffith University Author(s)
    Cropp, Roger A.
    Year published
    2019
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    Abstract
    The concept of a carrying capacity of an environment for a population has been an effective way of introducing a connection between populations and their environment. This approach has been particularly effective in heuristic Lotka–Volterra models of competition and predation that provide a basis for theoretical considerations of population interactions. However, the concept has proved less useful for interactions such as mutualism. The textbook Lotka–Volterra model of mutualism represents the interaction between two populations at the same trophic level that are each limited by the (negative) carrying capacities of the ...
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    The concept of a carrying capacity of an environment for a population has been an effective way of introducing a connection between populations and their environment. This approach has been particularly effective in heuristic Lotka–Volterra models of competition and predation that provide a basis for theoretical considerations of population interactions. However, the concept has proved less useful for interactions such as mutualism. The textbook Lotka–Volterra model of mutualism represents the interaction between two populations at the same trophic level that are each limited by the (negative) carrying capacities of the environment. The model predicts that obligate mutualist populations will either go extinct or become infinite. The classical fail diagram of obligate mutualist population interactions can be remedied by explicitly accounting for resources. The inclusion of explicit connections to the environment through resource representation and accounting for each population shows that the equivalent of the classic fail diagram is actually a sensible solution. A resource-based modelling framework saves the Lotka–Volterra model, allowing the classic population interactions of competition, predation and mutualism to be considered in a single unified framework.
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    Journal Title
    ECOLOGICAL MODELLING
    Volume
    401
    DOI
    https://doi.org/10.1016/j.ecolmodel.2019.03.010
    Copyright Statement
    © 2019 Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International Licence (http://creativecommons.org/licenses/by-nc-nd/4.0/) which permits unrestricted, non-commercial use, distribution and reproduction in any medium, providing that the work is properly cited.
    Subject
    Ecology
    Ecological economics
    Population ecology
    Environmental sociology
    Publication URI
    http://hdl.handle.net/10072/385103
    Collection
    • Journal articles

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