Shifts in coralline algae, macroalgae, and coral juveniles in the Great Barrier Reef associated with present-day ocean acidification

Shifts in coralline algae, macroalgae, and coral juveniles in the Great Barrier Reef associated with present-day ocean acidification

© 2020 Commonwealth of Australia. Global Change Biology © 2020 John Wiley & Sons Ltd.

Bibliographische Detailangaben
Veröffentlicht in:Global change biology. - 1999. - 26(2020), 4 vom: 08. Apr., Seite 2149-2160
1. Verfasser: Smith, Joy N (VerfasserIn)
Weitere Verfasser: Mongin, Mathieu, Thompson, Angus, Jonker, Michelle J, De'ath, Glenn, Fabricius, Katharina E
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2020
Zugriff auf das übergeordnete Werk:Global change biology
Schlagworte:Journal Article Great Barrier Reef aragonite saturation states coastal acidification coral juveniles coral reefs coralline algae macro algae ocean acidification thresholds
Beschreibung
Zusammenfassung:© 2020 Commonwealth of Australia. Global Change Biology © 2020 John Wiley & Sons Ltd.
Seawater acidification from increasing CO2 is often enhanced in coastal waters due to elevated nutrients and sedimentation. Our understanding of the effects of ocean and coastal acidification on present-day ecosystems is limited. Here we use data from three independent large-scale reef monitoring programs to assess coral reef responses associated with changes in mean aragonite saturation state (Ωar ) in the Great Barrier Reef World Heritage Area (GBR). Spatial declines in mean Ωar are associated with monotonic declines in crustose coralline algae (up to 3.1-fold) and coral juvenile densities (1.3-fold), while non-calcifying macroalgae greatly increase (up to 3.2-fold), additionally to their natural changes across and along the GBR. These three key groups of organisms are important proxies for coral reef health. Our data suggest a tipping point at Ωar 3.5-3.6 for these coral reef health indicators. Suspended sediments acted as an additive stressor. The latter suggests that effective water quality management to reduce suspended sediments might locally and temporarily reduce the pressure from ocean acidification on these organisms
Beschreibung:Date Revised 29.11.2023
published: Print-Electronic
Citation Status PubMed-not-MEDLINE
ISSN:1365-2486
DOI:10.1111/gcb.14985