The origin of suspended particulate matter in the Great Barrier Reef

M. Bahadori; C. Chen; S. Lewis; Juntao Wang; J. Shen; E. Hou; M. R. Rashti; Q. Huang; Z. Bainbridge; T. Stevens

doi:10.1038/s41467-023-41183-z

The origin of suspended particulate matter in the Great Barrier Reef

M. Bahadori, C. Chen, S. Lewis, Juntao Wang, J. Shen, E. Hou, M. R. Rashti, Q. Huang, Z. Bainbridge, T. Stevens

Western Sydney University

Research output: Contribution to journal › Article › peer-review

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.

Original language	English
Article number	5629
Number of pages	11
Journal	Nature Communications
Volume	14
Issue number	1
DOIs	https://doi.org/10.1038/s41467-023-41183-z
Publication status	Published - Dec 2023

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Cite this

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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.",

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AU - Bahadori, M.

AU - Chen, C.

AU - Lewis, S.

AU - Wang, Juntao

AU - Shen, J.

AU - Hou, E.

AU - Rashti, M. R.

AU - Huang, Q.

AU - Bainbridge, Z.

AU - Stevens, T.

PY - 2023/12

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AB - 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.

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JO - Nature Communications

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The origin of suspended particulate matter in the Great Barrier Reef

Abstract

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