Coral assemblages at higher latitudes favor short-term potential over long-term performance

James Cant*, James D. Reimer, Brigitte Sommer, Katie M. Cook, Sun W. Kim, Carrie A. Sims, Takuma Mezaki, Cliodhna O'Flaherty, Maxime Brooks, Hamish A. Malcolm, John M. Pandolfi, Roberto Salguero-Gómez, Maria Beger

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)
4 Downloads (Pure)

Abstract

The persistent exposure of coral assemblages to more variable abiotic regimes is assumed to augment their resilience to future climatic variability. Yet, while the determinants of coral population resilience across species remain unknown, we are unable to predict the winners and losers across reef ecosystems exposed to increasingly variable conditions. Using annual surveys of 3171 coral individuals across Australia and Japan (2016-2019), we explore spatial variation across the short- and long-term dynamics of competitive, stress-tolerant, and weedy assemblages to evaluate how abiotic variability mediates the structural composition of coral assemblages. We illustrate how, by promoting short-term potential over long-term performance, coral assemblages can reduce their vulnerability to stochastic environments. However, compared to stress-tolerant, and weedy assemblages, competitive coral taxa display a reduced capacity for elevating their short-term potential. Accordingly, future climatic shifts threaten the structural complexity of coral assemblages in variable environments, emulating the degradation expected across global tropical reefs.
Original languageEnglish
Article numbere4138
Number of pages16
JournalEcology
Volume104
Issue number9
Early online date30 Jul 2023
DOIs
Publication statusPublished - 1 Sept 2023

Keywords

  • Amplification
  • Demography
  • Integral projection model (IPM)
  • Resilience
  • Subtropical
  • Transient dynamics

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