Partitioning the environmental drivers of immunocompetence

Jackson, JA ORCID: https://orcid.org/0000-0003-0330-5478, Friberg, IM, Hablutzel, PI, Masud, N, Stewart, A, Synnott, R and Cable, J 2020, 'Partitioning the environmental drivers of immunocompetence' , Science of the Total Environment, 747 , p. 141152.

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Abstract

By determining susceptibility to disease, environment-driven variation in immune responses can affect the health, productivity and fitness of vertebrates. Yet how the different components of the total environment control this immune variation is remarkably poorly understood. Here, through combining field observation, experimentation and modelling, we are able to quantitatively partition the key environmental drivers of constitutive immune allocation in a model wild vertebrate (three-spined stickleback, Gasterosteus aculeatus). We demonstrate that, in natural populations, thermal conditions and diet alone are sufficient (and necessary) to explain a dominant (seasonal) axis of variation in immune allocation. This dominant axis contributes to both infection resistance and tolerance and, in turn, to the vital rates of infectious agents and the progression of the disease they cause. Our results illuminate the environmental regulation of vertebrate immunity (given the evolutionary conservation of the molecular pathways involved) and they identify mechanisms through which immunocompetence and host-parasite dynamics might be impacted by changing environments. In particular, we predict a dominant sensitivity of immunocompetence and host-pathogen dynamics to host diet shifts.

Item Type: Article
Schools: Schools > School of Environment and Life Sciences > Ecosystems and Environment Research Centre
Journal or Publication Title: Science of the Total Environment
Publisher: Elsevier
ISSN: 0048-9697
Related URLs:
Funders: Leverhulme Trust, Fisheries Society of the British Isles
Depositing User: JA Jackson
Date Deposited: 20 Jul 2020 13:21
Last Modified: 01 Sep 2020 14:45
URI: http://usir.salford.ac.uk/id/eprint/57660

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