期刊
SCIENCE ADVANCES
卷 8, 期 15, 页码 -出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/sciadv.abi5688
关键词
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资金
- Singapore Ministry of Education Academic Research Fund Tier 1 grant [RG 175/16]
- Sarawak Digital Centre of Excellence under the Sarawak Multimedia Authority
- CSIRO Oceans and Atmosphere
- Australian Academy of Sciences Regional Collaborations Programme
- Newton-Ungku Omar Fund [GL/F07/NUOF/01/2017]
- Nanyang Technological University Startup Grant
A study using satellite data found that the conversion of peatlands to nonforest land cover in Southeast Asia has led to an increase in terrigenous dissolved organic carbon concentration in coastal waters between 2002 and 2021. This increase in DOC concentration has also resulted in higher underwater light absorption, potentially impacting marine productivity.
Southeast Asia's peatlands are considered a globally important source of terrigenous dissolved organic carbon (DOC) to the ocean. Human disturbance has probably increased peatland DOC fluxes, but the lack of monitoring has precluded a robust demonstration of such a regional-scale impact. Here, we use a time series of satellite ocean color data from northwestern Borneo to show that DOC concentrations in coastal waters have increased between 2002 and 2021 by 0.31 mu mol liter(-1) year(-1) (95% confidence interval, 0.18 to 0.44 mu mol liter(-1) year(-1)). We show that this was caused by a >= 30% increase in the concentration of terrigenous DOC and coincided with the conversion of 69% of regional peatland area to nonforest land cover, suggesting that peatland conversion has substantially increased DOC fluxes to the sea. This rise in DOC concentration has also increased the underwater light absorption by dissolved organic matter, which may affect marine productivity by altering underwater light availability.
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