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The origin of suspended particulate matter in the Great Barrier Reef

Author

Listed:
  • Mohammad Bahadori

    (Griffith University
    Griffith University)

  • Chengrong Chen

    (Griffith University
    Griffith University)

  • Stephen Lewis

    (James Cook University)

  • Juntao Wang

    (Western Sydney University
    Western Sydney University)

  • Jupei Shen

    (Fujian Normal University)

  • Enqing Hou

    (Chinese Academy of Sciences)

  • Mehran Rezaei Rashti

    (Griffith University
    Griffith University)

  • Qiaoyun Huang

    (Huazhong Agricultural University)

  • Zoe Bainbridge

    (James Cook University)

  • Tom Stevens

    (James Cook University)

Abstract

River run-off has long been regarded as the largest source of organic-rich suspended particulate matter (SPM) in the Great Barrier Reef (GBR), contributing to high turbidity, pollutant exposure and increasing vulnerability of coral reef to climate change. However, the terrestrial versus marine origin of the SPM in the GBR is uncertain. Here we provide multiple lines of evidence (13C NMR, isotopic and genetic fingerprints) to unravel that a considerable proportion of the terrestrially-derived SPM is degraded in the riverine and estuarine mixing zones before it is transported further offshore. The fingerprints of SPM in the marine environment were completely different from those of terrestrial origin but more consistent with that formed by marine phytoplankton. This result indicates that the SPM in the GBR may not have terrestrial origin but produced locally in the marine environment, which has significant implications on developing better-targeted management practices for improving water quality in the GBR.

Suggested Citation

  • Mohammad Bahadori & Chengrong Chen & Stephen Lewis & Juntao Wang & Jupei Shen & Enqing Hou & Mehran Rezaei Rashti & Qiaoyun Huang & Zoe Bainbridge & Tom Stevens, 2023. "The origin of suspended particulate matter in the Great Barrier Reef," Nature Communications, Nature, vol. 14(1), pages 1-11, December.
    • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-41183-z
    DOI: 10.1038/s41467-023-41183-z
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    References listed on IDEAS

    as
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    2. James E. Bauer & Wei-Jun Cai & Peter A. Raymond & Thomas S. Bianchi & Charles S. Hopkinson & Pierre A. G. Regnier, 2013. "The changing carbon cycle of the coastal ocean," Nature, Nature, vol. 504(7478), pages 61-70, December.
    3. Tim N. Enke & Gabriel E. Leventhal & Matthew Metzger & José T. Saavedra & Otto X. Cordero, 2018. "Microscale ecology regulates particulate organic matter turnover in model marine microbial communities," Nature Communications, Nature, vol. 9(1), pages 1-8, December.
    4. Rosseel, Yves, 2012. "lavaan: An R Package for Structural Equation Modeling," Journal of Statistical Software, Foundation for Open Access Statistics, vol. 48(i02).
    5. Terry P. Hughes & Jon C. Day & Jon Brodie, 2015. "Securing the future of the Great Barrier Reef," Nature Climate Change, Nature, vol. 5(6), pages 508-511, June.
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