Unravelling changing interspecific interactions across environmental gradients using Markov random fields

Ecology
Nicholas J ClarkOscar Lindberg

Abstract

Inferring interactions between co-occurring species is key to identify processes governing community assembly. Incorporating interspecific interactions in predictive models is common in ecology, yet most methods do not adequately account for indirect interactions (where an interaction between two species is masked by their shared interactions with a third) and assume interactions do not vary along environmental gradients. Markov random fields (MRF) overcome these limitations by estimating interspecific interactions, while controlling for indirect interactions, from multispecies occurrence data. We illustrate the utility of MRFs for ecologists interested in interspecific interactions, and demonstrate how covariates can be included (a set of models known as Conditional Random Fields, CRF) to infer how interactions vary along environmental gradients. We apply CRFs to two data sets of presence-absence data. The first illustrates how blood parasite (Haemoproteus, Plasmodium, and nematode microfilaria spp.) co-infection probabilities covary with relative abundance of their avian hosts. The second shows that co-occurrences between mosquito larvae and predatory insects vary along water temperature gradients. Other applications are disc...Continue Reading

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Citations

Aug 14, 2019·The Journal of Animal Ecology·Spencer C GalenSusan L Perkins
Aug 11, 2019·Ecological Applications : a Publication of the Ecological Society of America·Zihua ZhaoJames R Carey
Nov 30, 2019·The Journal of Animal Ecology·Nicholas M Fountain-JonesMeggan E Craft
Apr 8, 2020·Transboundary and Emerging Diseases·Nicholas J ClarkRicardo J Soares Magalhães
May 20, 2020·Ecology Letters·F Guillaume BlanchetDominique Gravel
Apr 10, 2019·Ecology and Evolution·Marti J AndersonArden E Miller
Sep 10, 2019·Emerging Microbes & Infections·Alison J PeelNicholas Clark
Jun 19, 2019·Tropical Medicine and Infectious Disease·Eugene RuberanzizaRicardo J Soares Magalhães
Nov 25, 2020·The Journal of Animal Ecology·Caroline K GliddenAnna E Jolles
Feb 2, 2021·The Journal of Animal Ecology·Joshua I Brian, David C Aldridge

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