Prediction of unprecedented biological shifts in the global ocean

G. Beaugrand (), A. Conversi, A. Atkinson, J. Cloern, S. Chiba, S. Fonda-Umani, R. R. Kirby, C. H. Greene, E. Goberville, S. A. Otto, P. C. Reid, L. Stemmann and M. Edwards
Additional contact information
G. Beaugrand: Université de Lille, Université du Littoral Côte d’Opale
A. Conversi: Istituto di Scienze Marine
A. Atkinson: Plymouth Marine Laboratory
J. Cloern: United States Geological Survey
S. Chiba: Japan Agency for Marine-Earth Science and Technology
S. Fonda-Umani: University of Trieste
R. R. Kirby: The Secchi Disk Foundation
C. H. Greene: Cornell University
E. Goberville: CP53
S. A. Otto: University of Hamburg
P. C. Reid: Citadel Hill Laboratory
L. Stemmann: Laboratoire d’Océanographie de Villefranche
M. Edwards: Citadel Hill Laboratory

Nature Climate Change, 2019, vol. 9, issue 3, 237-243

Abstract: Abstract Impermanence is an ecological principle1 but there are times when changes occur nonlinearly as abrupt community shifts (ACSs) that transform the ecosystem state and the goods and services it provides2. Here, we present a model based on niche theory3 to explain and predict ACSs at the global scale. We test our model using 14 multi-decadal time series of marine metazoans from zooplankton to fish, spanning all latitudes and the shelf to the open ocean. Predicted and observed fluctuations correspond, with both identifying ACSs at the end of the 1980s4–7 and 1990s5,8. We show that these ACSs coincide with changes in climate that alter local thermal regimes, which in turn interact with the thermal niche of species to trigger long-term and sometimes abrupt shifts at the community level. A large-scale ACS is predicted after 2014—unprecedented in magnitude and extent—coinciding with a strong El Niño event and major shifts in Northern Hemisphere climate. Our results underline the sensitivity of the Arctic Ocean, where unprecedented melting may reorganize biological communities5,9, and suggest an increase in the size and consequences of ACS events in a warming world.

Date: 2019
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DOI: 10.1038/s41558-019-0420-1

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