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Real-world time-travel experiment shows ecosystem collapse due to anthropogenic climate change

Author

Listed:
  • Guandong Li

    (Tulane University)

  • Torbjörn E. Törnqvist

    (Tulane University)

  • Sönke Dangendorf

    (Tulane University)

Abstract

Predicting climate impacts is challenging and has to date relied on indirect methods, notably modeling. Here we examine coastal ecosystem change during 13 years of unusually rapid, albeit likely temporary, sea-level rise ( > 10 mm yr−1) in the Gulf of Mexico. Such rates, which may become a persistent feature in the future due to anthropogenic climate change, drove rising water levels of similar magnitude in Louisiana’s coastal wetlands. Measurements of surface-elevation change at 253 monitoring sites show that 87% of these sites are unable to keep up with rising water levels. We find no evidence for enhanced wetland elevation gain through ecogeomorphic feedbacks, where more frequent inundation would lead to enhanced biomass accumulation that could counterbalance rising water levels. We attribute this to the exceptionally rapid sea-level rise during this time period. Under the current climate trajectory (SSP2-4.5), drowning of ~75% of Louisiana’s coastal wetlands is a plausible outcome by 2070.

Suggested Citation

  • Guandong Li & Torbjörn E. Törnqvist & Sönke Dangendorf, 2024. "Real-world time-travel experiment shows ecosystem collapse due to anthropogenic climate change," Nature Communications, Nature, vol. 15(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-45487-6
    DOI: 10.1038/s41467-024-45487-6
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