Correcting a major error in assessing organic carbon pollution in natural waters

被引：60

作者：

Jiao, Nianzhi ^{[1
,2
,3
,4
,5
]}

Liu, Jihua ^{[3
,4
,5
,6
]}

Edwards, Bethanie ^{[7
]}

Lv, Zongqing ^{[1
,2
]}

Cai, Ruanhong ^{[1
,2
,3
,4
,5
]}

Liu, Yongqin ^{[8
]}

Xiao, Xilin ^{[1
,2
,3
,4
,5
]}

Wang, Jianning ^{[1
,2
,3
,4
,5
]}

Jiao, Fanglue ^{[3
,4
,5
,9
]}

Wang, Rui ^{[1
,2
]}

Huang, Xingyu ^{[1
,2
]}

Guo, Bixi ^{[8
]}

Sun, Jia ^{[1
,2
,3
,4
,5
]}

Zhang, Rui ^{[1
,2
,3
,4
,5
]}

Zhang, Yao ^{[1
,2
,3
,4
,5
]}

Tang, Kai ^{[1
,2
,3
,4
,5
]}

Zheng, Qiang ^{[1
,2
,3
,4
,5
]}

Azam, Farooq ^{[10
]}

Batt, John ^{[3
,4
,5
,9
]}

Cai, Wei-Jun ^{[11
]}

He, Chen ^{[12
]}

Herndl, Gerhard J. ^{[13
,14
]}

Hill, Paul ^{[9
]}

Hutchins, David ^{[15
]}

LaRoche, Julie ^{[16
]}

Lewis, Marlon ^{[9
]}

MacIntyre, Hugh ^{[9
]}

Polimene, Luca ^{[17
]}

Robinson, Carol ^{[18
]}

Shi, Quan ^{[12
]}

Suttle, Curtis A. ^{[19
,20
,21
,22
]}

Thomas, Helmuth ^{[3
,4
,5
,9
,23
]}

Wallace, Douglas ^{[3
,4
,5
,9
]}

Legendre, Louis ^{[24
]}

机构：

[1] Xiamen Univ, State Key Lab Marine Environm Sci, Xiamen 361005, Peoples R China

[2] Xiamen Univ, Coll Ocean & Earth Sci, Fujian Key Lab Marine Carbon Sequestrat, Xiamen 361005, Peoples R China

[3] Dalhousie Univ, Joint Lab Ocean Res & Educ, Halifax, NS B3H 4R2, Canada

[4] Shandong Univ, Qingdao 266237, Peoples R China

[5] Xiamen Univ, Xiamen 361005, Peoples R China

[6] Shandong Univ, Inst Marine Sci & Technol, Qingdao 266237, Peoples R China

[7] Univ Calif Berkeley, Earth & Planetary Sci Dept, Berkeley, CA 94720 USA

[8] Inst Tibetan Plateau Res, Key Lab Tibetan Environm Changes & Land Surface P, Beijing 100101, Peoples R China

[9] Dalhousie Univ, Dept Oceanog, Halifax, NS B3H 4R2, Canada

[10] Univ Calif San Diego, Scripps Inst Oceanog, Marine Biol Res Div, La Jolla, CA 92093 USA

[11] Univ Delaware, Sch Marine Sci & Policy, Newark, DE 19716 USA

[12] China Univ Petr, State Key Lab Heavy Oil Proc, Beijing 102249, Peoples R China

[13] Univ Vienna, Dept Limnol & Biooceanog, Althanstr 14, A-1090 Vienna, Austria

[14] Univ Utrecht, Royal Netherlands Inst Sea Res, Dept Marine Microbiol & Biogeochem, NIOZ, Nioz, Netherlands

[15] Univ Southern Calif, Dept Biol Sci, Marine & Environm Biol Sect, Los Angeles, CA 90089 USA

[16] Dalhousie Univ, Dept Biol, Halifax, NS B3H 4R2, Canada

[17] Plymouth Marine Lab, Prospect Pl, Plymouth PL1 3DH, Devon, England

[18] Univ East Anglia, Ctr Ocean & Atmospher Sci, Sch Environm Sci, Norwich NR4 7TJ, Norfolk, England

[19] Univ British Columbia, Dept Earth Ocean & Atmospher Sci, Columbia, BC V6T 1Z4, Canada

[20] Univ British Columbia, Dept Bot, Columbia, BC V6T 1Z4, Canada

[21] Univ British Columbia, Dept Microbiol & Immunol, Columbia, BC V6T 1Z4, Canada

[22] Univ British Columbia, Inst Oceans & Fisheries, Columbia, BC V6T 1Z4, Canada

[23] Helmholtz Ctr Geesthacht, Inst Coastal Res, Max Planck Str 1, D-21502 Geesthacht, Germany

[24] Sorbonne Univ, Lab Oceanog Villefranche, CNRS, LOV, F-06230 Villefranche Sur Mer, France

来源：

SCIENCE ADVANCES | 2021年 / 7卷 / 16期

基金：

美国国家科学基金会; 英国自然环境研究理事会; 中国国家自然科学基金;

关键词：

101;

D O I：

10.1126/sciadv.abc7318

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

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.

引用

页数：10

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