Pushed waves, trailing edges, and extreme events: Eco‐evolutionary dynamics of a geographic range shift in the owl limpet, Lottia gigantea DOI Creative Commons
Erica S. Nielsen,

Samuel Walkes,

Jacqueline L. Sones

et al.

Global Change Biology, Journal Year: 2024, Volume and Issue: 30(7)

Published: July 1, 2024

Abstract As climatic variation re‐shapes global biodiversity, understanding eco‐evolutionary feedbacks during species range shifts is of increasing importance. Theory on expansions distinguishes between two different forms: “pulled” and “pushed” waves. Pulled waves occur when the source expansion comes from low‐density peripheral populations, while pushed recruitment to expanding edge supplied by high‐density populations closer species' core. How extreme events shape pushed/pulled wave events, as well trailing‐edge declines/contractions, remains largely unexplored. We examined responses a marine invertebrate (the owl limpet, Lottia gigantea ) that increased in abundance 2014–2016 heatwaves near poleward its geographic northeastern Pacific. used whole‐genome sequencing 19 across >11 degrees latitude characterize genomic variation, gene flow, demographic histories range. estimated present‐day dispersal potential past stability identify how contemporary historical seascape features characteristics. Consistent with expectations wave, we found little differentiation core leading‐edge higher diversity at edges. A large well‐mixed population northern likely result ocean current anomalies larval settlement high‐dispersal biogeographic boundaries. Trailing‐edge have possibly driven local selection limited high Last Glacial Maximum. Our findings suggest can drive carry adaptive also cautioning extirpations may threaten unique evolutionary variation. This work highlights importance both trailing leading edges respond change events.

Language: Английский

The ecological and evolutionary consequences of tropicalisation DOI Creative Commons
Karolina Zarzyczny, Marc Rius, Suzanne T. Williams

et al.

Trends in Ecology & Evolution, Journal Year: 2023, Volume and Issue: 39(3), P. 267 - 279

Published: Nov. 28, 2023

Tropicalisation is a marine phenomenon arising from contemporary climate change, and characterised by the range expansion of tropical/subtropical species retraction temperate species. occurs globally can be detected in both tropical/temperate transition zones regions. The ecological consequences tropicalisation single-species impacts (e.g., altered behaviour) to whole ecosystem changes phase shifts intertidal subtidal habitats). Our understanding evolutionary limited, but emerging evidence suggests that could induce phenotypic change as well genotypic composition expanding retracting Given rapid rate research on focusing functioning, biodiversity socioeconomic urgently needed.

Language: Английский

Citations

21
Pushed waves, trailing edges, and extreme events: Eco‐evolutionary dynamics of a geographic range shift in the owl limpet, Lottia gigantea DOI Creative Commons
Erica S. Nielsen,

Samuel Walkes,

Jacqueline L. Sones

et al.

Global Change Biology, Journal Year: 2024, Volume and Issue: 30(7)

Published: July 1, 2024

Abstract As climatic variation re‐shapes global biodiversity, understanding eco‐evolutionary feedbacks during species range shifts is of increasing importance. Theory on expansions distinguishes between two different forms: “pulled” and “pushed” waves. Pulled waves occur when the source expansion comes from low‐density peripheral populations, while pushed recruitment to expanding edge supplied by high‐density populations closer species' core. How extreme events shape pushed/pulled wave events, as well trailing‐edge declines/contractions, remains largely unexplored. We examined responses a marine invertebrate (the owl limpet, Lottia gigantea ) that increased in abundance 2014–2016 heatwaves near poleward its geographic northeastern Pacific. used whole‐genome sequencing 19 across >11 degrees latitude characterize genomic variation, gene flow, demographic histories range. estimated present‐day dispersal potential past stability identify how contemporary historical seascape features characteristics. Consistent with expectations wave, we found little differentiation core leading‐edge higher diversity at edges. A large well‐mixed population northern likely result ocean current anomalies larval settlement high‐dispersal biogeographic boundaries. Trailing‐edge have possibly driven local selection limited high Last Glacial Maximum. Our findings suggest can drive carry adaptive also cautioning extirpations may threaten unique evolutionary variation. This work highlights importance both trailing leading edges respond change events.

Language: Английский

Citations

1