Correcting a major error in assessing organic carbon pollution in natural waters
Nianzhi Jiao
(1, 2)
,
Jihua Liu
(3, 2, 4)
,
Bethanie Edwards
(5)
,
Zongqing Lv
(1)
,
Ruanhong Cai
(1, 4, 2)
,
Yongqin Liu
,
Xilin Xiao
(1, 4, 2)
,
Jianning Wang
(1, 4, 2)
,
Fanglue Jiao
(4, 2)
,
Rui Wang
(1)
,
Xingyu Huang
(1)
,
Bixi Guo
,
Jia Sun
(1, 4, 2)
,
Rui Zhang
(1, 4, 2)
,
Yao Zhang
(1, 4, 2)
,
Kai Tang
(1, 4, 2)
,
Qiang Zheng
(1, 4, 2)
,
Farooq Azam
(6)
,
John Batt
(4, 3)
,
Wei-Jun Cai
(7)
,
Chen He
(8)
,
Gerhard J Herndl
(9, 10, 11)
,
Paul Hill
(4)
,
David Hutchins
(12)
,
Julie Laroche
(4)
,
Marlon Lewis
(4)
,
Hugh Macintyre
(4)
,
Luca Polimene
(13)
,
Carol Robinson
(14)
,
Quan Shi
(8)
,
Curtis A Suttle
(15)
,
Helmuth Thomas
(4, 2, 3, 16)
,
Douglas Wallace
(4, 2, 3)
,
Louis Legendre
(17)
1
MEL -
State Key Laboratory of Marine Environmental Science
2 Shandong University
3 Xiamen University
4 Dalhousie University [Halifax]
5 UC Berkeley - University of California [Berkeley]
6 UC San Diego - University of California [San Diego]
7 University of Delaware [Newark]
8 China University of Petroleum
9 University of Vienna [Vienna]
10 NIOZ - Royal Netherlands Institute for Sea Research
11 Universiteit Utrecht / Utrecht University [Utrecht]
12 USC - University of Southern California
13 PML - Plymouth Marine Laboratory
14 COAS - Centre for Ocean and Atmospheric Sciences [Norwich]
15 Institute for the Oceans and Fisheries
16 Institut für Küstenforschung / Institute of Coastal Research
17 LOV - Laboratoire d'océanographie de Villefranche
2 Shandong University
3 Xiamen University
4 Dalhousie University [Halifax]
5 UC Berkeley - University of California [Berkeley]
6 UC San Diego - University of California [San Diego]
7 University of Delaware [Newark]
8 China University of Petroleum
9 University of Vienna [Vienna]
10 NIOZ - Royal Netherlands Institute for Sea Research
11 Universiteit Utrecht / Utrecht University [Utrecht]
12 USC - University of Southern California
13 PML - Plymouth Marine Laboratory
14 COAS - Centre for Ocean and Atmospheric Sciences [Norwich]
15 Institute for the Oceans and Fisheries
16 Institut für Küstenforschung / Institute of Coastal Research
17 LOV - Laboratoire d'océanographie de Villefranche
Nianzhi Jiao
- Fonction : Auteur
- PersonId : 981517
Yongqin Liu
- Fonction : Auteur
Bixi Guo
- Fonction : Auteur
Carol Robinson
- Fonction : Auteur
- PersonId : 766170
- ORCID : 0000-0001-7829-5505
Quan Shi
- Fonction : Auteur
- PersonId : 803872
- ORCID : 0000-0002-1363-1237
Douglas Wallace
- Fonction : Auteur
Louis Legendre
- Fonction : Auteur
- PersonId : 1236941
- IdHAL : louis-legendre
Résumé
Microbial degradation of dissolved organic carbon (DOC) in aquatic environments can cause oxygen depletion, water acidification, and CO2 emissions. These problems are caused by labile DOC (LDOC) and not refractory DOC (RDOC) that resists degradation and is thus a carbon sink. For nearly a century, chemical oxygen demand (COD) has been widely used for assessment of organic pollution in aquatic systems. Here, we show through a multicountry survey and experimental studies that COD is not an appropriate proxy of microbial degradability of organic matter because it oxidizes both LDOC and RDOC, and the latter contributes up to 90% of DOC in high-latitude forested areas. Hence, COD measurements do not provide appropriate scientific information on organic pollution in natural waters and can mislead environmental policies. We propose the replacement of the COD method with an optode-based biological oxygen demand method to accurately and efficiently assess organic pollution in natural aquatic environments.
Domaines
Sciences de l'environnement
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Jiao et al. - 2021 - Correcting a major error in assessing organic carb.pdf (1.8 Mo)
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