Long-term changes in temperate marine fish assemblages are driven by a small subset of species
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The species composition of plant and animal assemblages across the globe has changed substantially over the past century. How do the dynamics of individual species cause this change? We classified species into seven unique categories of temporal dynamics based on the ordered sequence of presences and absences that each species contributes to an assemblage time series. We applied this framework to 14,434 species trajectories comprising 280 assemblages of temperate marine fishes surveyed annually for 20 or more years. Although 90% of the assemblages diverged in species composition from the baseline year, this compositional change was largely driven by only 8% of the species` trajectories. Quantifying the reorganization of assemblages based on species shared temporal dynamics should facilitate the task of monitoring and restoring biodiversity. We suggest ways in which our framework could provide informative measures of compositional change, as well as leverage future research on pattern and process in ecological systems.
Gotelli , N J , Moyes , F , Antão , L H , Blowes , S A , Dornelas , M , McGill , B J , Penny , A , Schipper , A , Shimadzu , H , Supp , S R , Waldock , C A & Magurran , A E 2021 , ' Long-term changes in temperate marine fish assemblages are driven by a small subset of species ' , Global Change Biology , vol. Early View . https://doi.org/10.1111/gcb.15947
Global Change Biology
Copyright © 2021 The Authors. Global Change Biology published by John Wiley & Sons Ltd. This is an open access article under the terms of the Creative Commons Attribution-NonCommercial License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.
DescriptionFunding: Jane and Aatos Erkko Foundation (LHA); Japan Society for the Promotion of Science (JP19K21569) (HS); Leverhulme Trust (RPG-2019-402) (AEM, MD, FM, AP); Leverhulme Trust Research Centre - the Leverhulme Centre for Anthropocene Biodiversity (MD); USA National Science Foundation grant 2019470 (BJM, NJG); USA National Science Foundation/ UKRI Natural Environment Research Council grant NE/V009338/1 (MD).
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