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Title: Rising dissolved organic carbon concentrations in coastal waters of northwestern Borneo related to tropical peatland conversion
Authors: Sanwlani, Nivedita
Evans, Chris D.
Müller, Moritz
Cherukuru, Nagur
Martin, Patrick
Keywords: Science::Geology
Issue Date: 2022
Source: Sanwlani, N., Evans, C. D., Müller, M., Cherukuru, N. & Martin, P. (2022). Rising dissolved organic carbon concentrations in coastal waters of northwestern Borneo related to tropical peatland conversion. Science Advances, 8(15), eabi5688-.
Project: RG 175/16 
Journal: Science Advances 
Abstract: 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 μmol liter-1 year-1 (95% confidence interval, 0.18 to 0.44 μmol 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.
ISSN: 2375-2548
DOI: 10.1126/sciadv.abi5688
Schools: Asian School of the Environment 
Rights: © 2022 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution License 4.0 (CC BY).
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:ASE Journal Articles

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