Evidence map›Paper›PMID 41968614›Full record

ArticleEcology2026

Spatially-nested topologies stabilize meta-ecosystems via cross-scale source-sink dynamics.

Tianna Peller, Isabelle Gounand, Marie-Josée Fortin, Frédéric Guichard

Abstract read
In one paragraph

Article in Ecology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.

0numbers the graph read from it
0cells of the map it votes in
1citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

1 citing paper in PubMed.

  1. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

4 authors.

Tianna PellerDepartment of Ecology and Evolutionary Biology, University of Toronto, Toronto, Ontario, Canada.ORCID https://orcid.org/0000-0002-7131-2066
Isabelle GounandSorbonne Université, CNRS, UPEC, CNRS, IRD, INRAE, Institut d'écologie et des sciences de l'environnement, IEES, Paris, France.ORCID https://orcid.org/0000-0002-0675-3973
Marie-Josée FortinDepartment of Ecology and Evolutionary Biology, University of Toronto, Toronto, Ontario, Canada.
Frédéric GuichardDepartment of Biology, McGill University, Montréal, Québec, Canada.ORCID https://orcid.org/0000-0002-7369-482X

Funding

Fonds de recherche du Québec - Nature et technologiesNatural Science and Engineering Research Council of Canada (NSERC)
6 · The paper itself

Abstract

Ecosystems are open to spatial flows of nonliving resources and dispersing organisms that can interact to drive their dynamics and functions. Empirical evidence shows resource flows and dispersal commonly have contrasting properties: resource flows connect nearby ecosystems of different types, while dispersal connects relatively distant ecosystems of similar types. For instance, islands and adjacent coral reefs are connected through resource exchanges but also exhibit organisms that disperse across larger spatial scales between homologous ecosystems. These contrasting properties of spatial flows can yield spatially nested topologies of diverse, coupled ecosystems, where nearby ecosystems coupled via resource flows are embedded within larger scale dispersal networks. Using meta-ecosystem models, we show that spatially nested topologies of coupled ecosystems have a general stabilizing effect on ecosystem dynamics. Stabilization results from the emergence of cross-scale source-sink dynamics, where some ecosystems act as nutrient sources but consumer sinks and others as nutrient sinks but consumer sources-creating a self-regulating spatial structure that dampens local instabilities. These dynamics lead to spatial variation in trophic regulation and biomass stocks across ecosystems of the same type: consumer sinks exhibit stronger top-down control and lower primary producer stocks, while consumer sources exhibit stronger bottom-up control and higher producer stocks. These local effects of cross-scale source-sink dynamics scale up to influence functions at the meta-ecosystem scale, including increasing primary production and nutrient retention. Critically, we further demonstrate how these source-sink dynamics depend on the dispersal rates of consumer species in both ecosystem types, such that the stability and function of one ecosystem type can be shaped by the dispersal rate of consumers in another. Our findings suggest that the diversity of ecosystem types and the hierarchy of spatial flow scales observed ubiquitously in nature are key properties of spatial ecological systems, driving their stability and functions across scales.

Indexed as

EcosystemModels, BiologicalAnimalsFood Chainbottom‐upcross‐ecosystemcross‐habitatdispersalecosystem functionsfood‐web resource flowsspatial networksspatial subsidiestop‐down

Identifiers

PMID41968614
PMCPMC13071351

What OpenQuestion holds

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LicenceCC BY
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.