Spatial Dynamics of Population Synchrony

Spatial dynamics of population synchrony examines how and why populations in different locations fluctuate in concert. Such synchrony emerges from a combination of correlated environmental forcing, dispersal among habitat patches, trophic interactions and the flow of resources across ecosystem boundaries. Environmental drivers include climatic variability, often mediated by large‐scale oscillations, whose spatial autocorrelation can entrain local population cycles. Dispersal and cross‐ecosystem subsidies can further couple distant populations, while species interactions may amplify or dampen shared fluctuations. Empirical studies have documented pronounced geographical patterns of synchrony in systems ranging from freshwater invertebrates and terrestrial vegetation to marine plankton and shoreline fauna. Theoretical advances have elucidated mechanisms by which multiple environmental drivers interact to produce synergistic or destructive effects on synchrony at different timescales. Understanding these processes is vital for predicting extinction risk, managing metapopulation resilience and designing conservation corridors that mitigate the destabilising effects of excessive synchrony under global change.

Research from Nature Portfolio

Analyses of long‐term climate model outputs reveal that both spatial and temporal autocorrelation of temperature are projected to increase under high-emission scenarios, with regional breakpoints indicating an acceleration of spatial coherence around mid-century. Such trends suggest that ecological populations may face greater extinction risk as warming climates erode spatial refugia by synchronising unfavourable conditions across fragmented habitats. Complementary experimental work has demonstrated an enhanced Moran effect, whereby populations exposed to spatially heterogeneous autocorrelated noise become more synchronised than the environmental forcing itself. Chemostat experiments and numerical models confirm that variation in the memory of environmental fluctuations can intensify population synchrony, highlighting the importance of noise structure in driving large-scale ecological coherence.

Spatial Dynamics of Population Synchrony publication trend

The graph below shows the total number of articles in spatial dynamics of population synchrony across all publications each year (not limited to Nature Index journals).

Technical terms

Spatial synchrony: correlation in temporal fluctuations of population abundance among geographically separated locations.

Moran effect: synchronisation of population dynamics driven by spatially correlated environmental variation.

Spatial autocorrelation: the degree to which a variable at one location is correlated with values of the same variable at nearby locations.

Resource subsidy: transfer of organic matter or nutrients from one ecosystem to another that can couple population dynamics across boundaries.

Metapopulation: a network of local populations connected by dispersal within a landscape, whose collective dynamics influence species persistence.

References

1. Increased spatial and temporal autocorrelation of temperature under climate change. Scientific Reports (2018).
2. Enhanced Moran effect by spatial variation in environmental autocorrelation. Nature Communications (2015).
3. Climatic effects on the synchrony and stability of temperate headwater invertebrates over four decades. Global Change Biology (2023).
4. How environmental drivers of spatial synchrony interact. Ecography (2023).
5. Spatial synchrony cascades across ecosystem boundaries and up food webs via resource subsidies. Proceedings of the National Academy of Sciences of the United States of America (2024).
6. A global geography of synchrony for terrestrial vegetation. Global Ecology and Biogeography (2017).
7. A global geography of synchrony for marine phytoplankton. Global Ecology and Biogeography (2017).