Priority Effects and Nonhierarchical Competition Shape Species Composition in a Complex Grassland Community DOI
Lawrence H. Uricchio, S. Caroline Daws, Erin R. Spear

et al.

The American Naturalist, Journal Year: 2019, Volume and Issue: 193(2), P. 213 - 226

Published: Jan. 10, 2019

Niche and fitness differences control the outcome of competition, but determining their relative importance in invaded communities—which may be far from equilibrium—remains a pressing concern. Moreover, it is unclear whether classic approaches for studying which were developed predominantly pairs interacting species, will fully capture dynamics complex species assemblages. We parameterized population-dynamic model using competition experiments two native three exotic grassland community. found evidence minimal or niche between leading to slow replacement priority effects, large advantages allowed exotics unconditionally invade natives. Priority effects driven by strong interspecific drove single-species dominance one 80% outcomes, while mixture nonhierarchical coexistence occurred remaining 20%. Fungal infection, commonly hypothesized mechanism, had weak unlikely substantially affect coexistence. In contrast previous work on pairwise outcomes largely native-dominated communities, our supports role nearly neutral as drivers composition communities.

Language: Английский

Building modern coexistence theory from the ground up: The role of community assembly DOI Creative Commons
Jürg W. Spaak, Sebastian J. Schreiber

Ecology Letters, Journal Year: 2023, Volume and Issue: 26(11), P. 1840 - 1861

Published: Sept. 25, 2023

Abstract Modern coexistence theory (MCT) is one of the leading methods to understand species coexistence. It uses invasion growth rates—the average, per‐capita rate a rare species—to identify when and why coexist. Despite significant advances in dissecting mechanisms occurs, MCT relies on ‘mutual invasibility’ condition designed for two‐species communities but poorly defined species‐rich communities. Here, we review well‐known issues with this component propose solution based recent mathematical advances. We clear framework expanding understanding resistance as well coexistence, especially that could not be analysed so far. Using two data‐driven community models from literature, illustrate utility our highlight opportunities bridging fields assembly

Language: Английский

Citations

16
Non‐random interactions within and across guilds shape the potential to coexist in multi‐trophic ecological communities DOI
David García‐Callejas, Óscar Godoy, Lisa Buche

et al.

Ecology Letters, Journal Year: 2023, Volume and Issue: 26(6), P. 831 - 842

Published: March 27, 2023

Theory posits that the persistence of species in ecological communities is shaped by their interactions within and across trophic guilds. However, we lack empirical evaluations how structure, strength sign biotic drive potential to coexist diverse multi-trophic communities. Here, model community feasibility domains, a theoretically informed measure multi-species coexistence probability, from grassland comprising more than 45 on average three guilds (plants, pollinators herbivores). Contrary our hypothesis, increasing complexity, measured either as number or richness, did not decrease feasibility. Rather, observed high degrees self-regulation niche partitioning allow for maintaining larger levels higher Our results show are random nature both structures significantly contribute diversity.

Language: Английский

Citations

15
The three‐species problem: Incorporating competitive asymmetry and intransitivity in modern coexistence theory DOI Creative Commons
Ravi Ranjan, Thomas Koffel, Christopher A. Klausmeier

et al.

Ecology Letters, Journal Year: 2024, Volume and Issue: 27(4)

Published: April 1, 2024

Abstract While natural communities can contain hundreds of species, modern coexistence theory focuses primarily on species pairs. Alternatively, the structural stability approach considers feasibility equilibria, gaining scalability to larger but sacrificing information about dynamic stability. Three‐species competitive are a bridge more‐diverse communities. They display novel phenomena while remaining amenable mathematical analysis, remain incompletely understood. Here, we combine these approaches identify key quantities that determine three‐species competition outcomes. We show pairwise niche overlap and fitness differences insufficient completely characterize outcomes, which requires strictly triplet‐wise quantity: cyclic asymmetry, underlies intransitivity. Low stabilizes triplet, high promote exclusion. The effect asymmetry is complex depends overlap. In summary, elucidate how overlap,

Language: Английский

Citations

6
The assembly and dynamics of ecological communities in an ever‐changing world DOI Creative Commons
Óscar Godoy, Fernando Soler Toscano, José R. Portillo

et al.

Ecological Monographs, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 30, 2024

Abstract Alternative perspectives on the maintenance of biodiversity and assembly ecological communities suggest that both processes cannot be investigated simultaneously. In this concept synthesis, we challenge view by presenting major theoretical advances in structural stability permanence theory. These advances, which provide complementary views, allow studying short‐ long‐term dynamics as changes species richness, composition, abundance. Here, global attractor, technically named informational structure (IS), is central element to construct from information species' intrinsic growth rates their strength sign interactions. The attractor has four main properties: (1) It contains all limits what feasible unfeasible dynamical behavior an system, therefore, (2) it provides a thorough characterization combinations richness composition can coexist (i.e., stable equilibrium), (3) well connections (paths) between coexisting communities. Importantly, (4) such topology when environmental (abiotic biotic) variation affects ability grow interact with others. Overall, these properties switching traditional evaluation coexistence at equilibrium much more realistic nonequilibrium perspective where underlie transient dynamics. Several fields ecology benefit study IS. For instance, serve evaluate community responses after end perturbation, design restoration trajectories, consequences biological invasions persistence native within communities, or assess ecosystem health status. We illustrate latter possibility empirical observations 7 years Mediterranean annual grasslands. document extremely wet dry generate ISs supporting few paths. remaining distinguish winners losers ongoing climate change indicate future opportunities. A fully tractable operational framework readily available understand predict ever‐changing world.

Language: Английский

Citations

5
Priority Effects and Nonhierarchical Competition Shape Species Composition in a Complex Grassland Community DOI
Lawrence H. Uricchio, S. Caroline Daws, Erin R. Spear

et al.

The American Naturalist, Journal Year: 2019, Volume and Issue: 193(2), P. 213 - 226

Published: Jan. 10, 2019

Niche and fitness differences control the outcome of competition, but determining their relative importance in invaded communities—which may be far from equilibrium—remains a pressing concern. Moreover, it is unclear whether classic approaches for studying which were developed predominantly pairs interacting species, will fully capture dynamics complex species assemblages. We parameterized population-dynamic model using competition experiments two native three exotic grassland community. found evidence minimal or niche between leading to slow replacement priority effects, large advantages allowed exotics unconditionally invade natives. Priority effects driven by strong interspecific drove single-species dominance one 80% outcomes, while mixture nonhierarchical coexistence occurred remaining 20%. Fungal infection, commonly hypothesized mechanism, had weak unlikely substantially affect coexistence. In contrast previous work on pairwise outcomes largely native-dominated communities, our supports role nearly neutral as drivers composition communities.

Language: Английский

Citations

42