Coexistence in spatiotemporally fluctuating environments

  title={Coexistence in spatiotemporally fluctuating environments},
  author={Evan C. Johnson and Alan Hastings},
Ecologists have put forward many explanations for coexistence, but these are only partial explanations; nature is complex, so it is reasonable to assume that in any given ecological community, multiple mechanisms of coexistence are operating at the same time. Here, we present a methodology for quantifying the relative importance of different explanations for coexistence, based on an extension of Modern Coexistence Theory. Current versions of Modern Coexistence Theory only allow for the… 

Figures and Tables from this paper

Resolving conceptual issues in Modern Coexistence Theory

The conceptual underpinnings of Modern Coexistence Theory (MCT), a quantitative framework for understanding ecological coexistence, are discussed and a number of topics in MCT are reviewed, including the role of "scaling factors"; whether coexistence mechanisms are approximations; whether the magnitude or sign of invasion growth rates matters more; whether Hutchinson solved the paradox of the plankton; the scale-dependence of coexist mechanisms; and much more.



An expanded modern coexistence theory for empirical applications.

This work presents a general computational approach that extends the previous solution for the storage effect to all of standard MCT's spatial and temporal coexistence mechanisms, and also process-defined mechanisms amenable to direct study such as resource partitioning, indirect competition, and life history trade-offs.

Environmental Variability Promotes Coexistence in Lottery Competitive Systems

The analysis confirms the view that coexistence can occur in a system where space is allocated largely at random, provided environmental variability is sufficiently great (Sale 1977); but the explanations and predictions differ in detail with those of Sale.

Persistence in fluctuating environments

A mathematical theory extending the nonlinear theory of permanence for deterministic systems to stochastic difference and differential equations is developed and it is illustrated that environmental noise enhances or inhibits coexistence in communities with rock-paper-scissor dynamics depending on correlations between interspecific demographic rates.

Updates on mechanisms of maintenance of species diversity

  • P. Chesson
  • Environmental Science
    Journal of Ecology
  • 2018
A quantitative approach to species coexistence based on the invasibility criterion has led to an appreciation of coexistence mechanisms in terms of stabilizing and equalizing components, but major

Examining the Relative Importance of Spatial and Nonspatial Coexistence Mechanisms

This work presents a model inspired by the California red scale system, in which two parasitoids coexist on a single, tree‐dwelling host‐scale insect, and finds that habitat preference is much more effective at promoting coexistence in this model than in IGP.

When does environmental variation most influence species coexistence?

It is found that purely spatial variation has a greater capacity for influence than variation with a temporal component, and spatiotemporal variation can promote coexistence as strongly as purely temporal variation or more so, given the right species traits.

The Effects of Dynamical Rates on Species Coexistence in a Variable Environment: The Paradox of the Plankton Revisited

Fast resource depletion ensures strong coupling of environmental processes and competition, which leads to enhancement over time of intraspecific competition relative to interspecific competition as environmental shifts favor different species at different times.

New methods for quantifying the spatial storage effect: an illustration with desert annuals.

Neighborhood competition experiments are used to quantify the spatial storage effect and compare it to the separate (but not mutually exclusive) process of neighborhood-scale resource partitioning and can be applied to many existing data sets, as well as future field studies.

Methods for calculating coexistence mechanisms: Beyond scaling factors

There is no self-evident way to define coexistence mechanisms, so one must justify a definition by showing that it corresponds to widely-held intuitions about what qualifies as a good explanation for coexistence.