Concentration and compositional controls on degradation of permafrost-derived dissolved organic matter on the Qinghai-Tibetan Plateau

Wang, Yinghui1,2,3,4; Wang, Yasong1; Han, Lulu1; McKenna, Amy M.3,4,5; Kellerman, Anne M.3; Spencer, Robert G. M.3; Yang, Yuanhe6; Xu, Yunping1

2024-04-01

10.1002/lol2.10388

LIMNOLOGY AND OCEANOGRAPHY LETTERS   影响因子和分区

2378-2242

Understanding the fate of permafrost-derived dissolved organic matter (DOM) is critical for unraveling its role in carbon cycling. However, it remains unclear whether the high lability of permafrost-derived DOM can be attributed to intrinsic chemical properties or elevated carbon concentrations. We investigated the dynamics of permafrost DOM from the Qinghai-Tibetan Plateau using both biodegradation and photodegradation experiments. Biodegradation and photodegradation of permafrost-derived DOM exhibited distinct qualitative preferences for specific chemical groups (i.e., peptide-like and aromatics, respectively). Notably, reducing the initial concentration of dissolved organic carbon (DOC) by half and a quarter resulted in shifts in biodegradable DOC content from 11.2% to 11.5% and 8.5%, respectively, accompanied by a corresponding decrease in the biodegradation rate from 0.11 to 0.06 and 0.03. This insight highlights the importance of recognizing the interplay between DOM quality and concentration and bears broader significance for our understanding of the fate of permafrost-derived DOM in natural ecosystems.

SCI

英语

通讯

Science and Technology Innovation Plan Of Shanghai Science and Technology Commission[23230760300] ; National Science Foundation Division of Materials Research and Division of Chemistry[DMR-2128556] ; null[2014CB954001]

Marine & Freshwater Biology ; Oceanography

Limnology ; Marine & Freshwater Biology ; Oceanography

WOS:001198847400001

WILEY

Web of Science

1.Shanghai Ocean Univ, Coll Marine Sci, Shanghai, Peoples R China
2.Southern Univ Sci & Technol, Sch Environm Sci & Engn, State Environm Protect Key Lab Integrated Surface, Shenzhen, Peoples R China
3.Florida State Univ, Natl High Magnet Field Lab, Geochem Grp, Tallahassee, FL 32306 USA
4.Florida State Univ, Dept Earth Ocean & Atmospher Sci, Tallahassee, FL 32306 USA
5.Colorado State Univ, Dept Soil & Crop Sci, Ft Collins, CO USA
6.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing, Peoples R China

Wang, Yinghui,Wang, Yasong,Han, Lulu,et al. Concentration and compositional controls on degradation of permafrost-derived dissolved organic matter on the Qinghai-Tibetan Plateau[J]. LIMNOLOGY AND OCEANOGRAPHY LETTERS,2024.

Wang, Yinghui.,Wang, Yasong.,Han, Lulu.,McKenna, Amy M..,Kellerman, Anne M..,...&Xu, Yunping.(2024).Concentration and compositional controls on degradation of permafrost-derived dissolved organic matter on the Qinghai-Tibetan Plateau.LIMNOLOGY AND OCEANOGRAPHY LETTERS.

Wang, Yinghui,et al."Concentration and compositional controls on degradation of permafrost-derived dissolved organic matter on the Qinghai-Tibetan Plateau".LIMNOLOGY AND OCEANOGRAPHY LETTERS (2024).