Ecological networks, such as food webs, mutualist webs and host–parasite webs, are reorganizing as species abundances and spatial distributions shift in response to environmental change. Current theoretical expectations for how this reorganization will occur are available for competition or for parts of interaction networks, but these may not extend to more complex networks. Here we use metacommunity theory to develop new expectations for how complex networks will reorganize under environmental change, and show that dispersal is crucial for determining the degree to which networks will retain their composition and structure. When dispersal between habitat patches is low, all types of species interactions act as a strong determinant for whether species can colonize suitable habitats. This colonization resistance drives species turnover, which breaks apart current networks and leads to the formation of new networks. However, when dispersal rates are increased, colonists arrive in high abundance in habitats where they are well adapted, so interactions with resident species contribute less to colonization success. Dispersal ensures that species associations are maintained as they shift in space, so networks retain similar composition and structure. The crucial role of dispersal reinforces the need to manage habitat connectivity to sustain species and interaction diversity into the future.
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Bascompte, J. Disentangling the web of life. Science 325, 416–419 (2009).
Woodward, G., Benstead, J. P. & Beveridge, O. S. Ecological networks in a changing climate. Adv. Ecol. Res. 42, 71–138 (2010).
Tylianakis, J. M., Didham, R. K., Bascompte, J. & Wardle, D. A. Global change and species interactions in terrestrial ecosystems. Ecol. Lett. 11, 1351–1363 (2008).
Thebault, E. & Fontaine, C. Stability of ecological communities and the architecture of mutualistic and trophic networks. Science 329, 853–856 (2010).
Dunne, J. A., Williams, R. J. & Martinez, N. D. Network structure and biodiversity loss in food webs: robustness increases with connectance. Ecol. Lett. 5, 558–567 (2002).
Daskalov, G. M. et al. Architecture of collapse: regime shift and recovery in an hierarchically structured marine ecosystem. Glob. Chang. Biol. 23, 1486–1498 (2017).
Poisot, T., Stouffer, D. B. & Gravel, D. Beyond species: why ecological interaction networks vary through space and time. Oikos 124, 243–251 (2015).
Walther, G. R. Community and ecosystem responses to recent climate change. Phil. Trans. R. Soc. B 365, 2019–2024 (2010).
Poisot, T., Canard, E., Mouillot, D., Mouquet, N. & Gravel, D. The dissimilarity of species interaction networks. Ecol. Lett. 15, 1353–1361 (2012).
Lu, X. et al. Drought rewires the cores of food webs. Nat. Clim. Change 6, 875–878 (2016).
Urban, M. C., de Meester, L., Vellend, M., Stoks, R. & Vanoverbeke, J. A crucial step toward realism: responses to climate change from an evolving metacommunity perspective. Evol. Appl. 5, 154–167 (2011).
Leibold, M. A. et al. The metacommunity concept: a framework for multi-scale community ecology. Ecol. Lett. 7, 601–613 (2004).
Alexander, J. M., Diez, J. M & Levine, J. M. Novel competitors shape species’ responses to climate change. Nature (2015).
Urban, M. C., Zarnetske, P. L. & Skelly, D. K. Moving forward: dispersal and species interactions determine biotic responses to climate change. Ann. NY Acad. Sci. 1297, 44–60 (2013).
Norberg, J., Urban, M. C., Vellend, M., Klausmeier, C. A. & Loeuille, N. Eco-evolutionary responses of biodiversity to climate change. Nat. Clim. Change 2, 747–751 (2012).
Gilman, S. E., Urban, M. C., Tewksbury, J., Gilchrist, G. W. & Holt, R. D. A framework for community interactions under climate change. Trends Ecol. Evol. 25, 325–331 (2010).
Spasojevic, M. J., Harrison, S., Day, H. W. & Southard, R. J. Above- and belowground biotic interactions facilitate relocation of plants into cooler environments. Ecol. Lett. 17, 700–709 (2014).
Urban, M. C., Tewksbury, J. J. & Sheldon, K. S. On a collision course: competition and dispersal differences create no-analogue communities and cause extinctions during climate change. Proc. R. Soc. B 279, 2072–2080 (2012).
Loreau, M., Mouquet, N. & Gonzalez, A. Biodiversity as spatial insurance in heterogeneous landscapes. Proc. Natl Acad. Sci. USA 100, 12765–12770 (2003).
Brooker, R. W., Travis, J. M. J., Clark, E. J. & Dytham, C. Modelling species’ range shifts in a changing climate: the impacts of biotic interactions, dispersal distance and the rate of climate change. J. Theor. Biol. 245, 59–65 (2007).
Haddad, N. M. et al. Habitat fragmentation and its lasting impact on Earth’s ecosystems. Sci. Adv. 1, e1500052 (2015).
Soliveres, S., Smit, C. & Maestre, F. T. Moving forward on facilitation research: response to changing environments and effects on the diversity, functioning and evolution of plant communities. Biol. Rev. Camb. Philos. Soc. 90, 297–313 (2015).
Pillai, P., Gonzalez, A. & Loreau, M. Metacommunity theory explains the emergence of food web complexity. Proc. Natl Acad. Sci. USA 108, 19293–19298 (2011).
Gravel, D., Massol, F., Canard, E., Mouillot, D. & Mouquet, N. Trophic theory of island biogeography. Ecol. Lett. 14, 1010–1016 (2011).
Ives, A. R. & Cardinale, B. J. Food-web interactions govern the resistance of communities after non-random extinctions. Nature 429, 174–177 (2004).
Tylianakis, J. M., Laliberté, E., Nielsen, A. & Bascompte, J. Conservation of species interaction networks. Biol. Conserv. 143, 2270–2279 (2010).
HilleRisLambers, J., Harsch, M. A., Ettinger, A. K., Ford, K. R. & Theobald, E. J. How will biotic interactions influence climate change-induced range shifts? Ann. NY Acad. Sci. 1297, 112–125 (2013).
Zarnetske, P. L., Skelly, D. K. & Urban, M. C. Biotic multipliers of climate change. Science 336, 1516–1518 (2012).
Voigt, W. et al. Trophic levels are differentially sensitive to climate. Ecology 84, 2444–2453 (2003).
Ledger, M. E., Brown, L. E., Edwards, F. K., Milner, A. M. & Woodward, G. Drought alters the structure and functioning of complex food webs. Nat. Clim. Change 3, 223–227 (2012).
Woodward, G. et al. Climate change impacts in multispecies systems: drought alters food web size structure in a field experiment. Phil. Trans. R. Soc. B 367, 2990–2997 (2012).
McCann, K. S. Protecting biostructure. Nature 446, 29 (2007).
Urban, M. C. et al. Improving the forecast for biodiversity under climate change. Science 353, aad8466 (2016).
Gonzalez, A., Rayfield, B. & Lindo, Z. The disentangled bank: how loss of habitat fragments and disassembles ecological networks. Am. J. Bot. 98, 503–516 (2011).
Rayfield, B., Fortin, M.-J. & Fall, A. Connectivity for conservation: a framework to classify network measures. Ecology 92, 847–858 (2011).
McGuire, J. L., Lawler, J. J., McRae, B. H., Nuñez, T. A. & Theobald, D. M. Achieving climate connectivity in a fragmented landscape. Proc. Natl Acad. Sci. USA 113, 7195–7200 (2016).
Krosby, M., Tewksbury, J., Haddad, N. M. & Hoekstra, J. Ecological connectivity for a changing climate. Conserv. Biol. 24, 1686–1689 (2010).
Heller, N. E. & Zavaleta, E. S. Biodiversity management in the face of climate change: A review of 22 years of recommendations. Biol. Conserv. 142, 14–32 (2009).
R Core Team. R: a language and environment for statistical computing. (R Foundation for Statistical Computing, Vienna, Austria, 2015).
McCann, K. S., Hastings, A. & Huxel, G. R. Weak trophic interactions and the balance of nature. Nature 395, 794–798 (1998).
Koleff, P., Gaston, K. J. & Lennon, J. J. Measuring beta diversity for presence–absence data. J. Anim. Ecol. 72, 367–382 (2003).
Kones, J. K., Soetaert, K., van Oevelen, D. & Owino, J. O. Are network indices robust indicators of food web functioning? A Monte Carlo approach. Ecol. Model. 220, 370–382 (2009).
We thank M. O’Connor, B. Beisner, G. Fussmann, E. Pedersen, A. Ives and members of the Gonzalez lab for assistance and valuable feedback. P.L.T. is supported by NSERC, Vineberg and Killam fellowships. A.G. is supported by the Canada Research Chair program, Killam Fellowship, the Liber Ero Chair in Conservation Biology and NSERC.
The authors declare no competing financial interests.
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Thompson, P., Gonzalez, A. Dispersal governs the reorganization of ecological networks under environmental change. Nat Ecol Evol 1, 0162 (2017). https://doi.org/10.1038/s41559-017-0162
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