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Character and environmental lability of cyanobacteria-derived dissolved organic matter

Patriarca, Claudia and Sedano-Nunez, Vicente T. and Garcia, Sarahi L. and Bergquist, Jonas and Bertilsson, Stefan and Sjoberg, Per J. R. and Tranvik, Lars J. and Hawkes, Jeffrey A. (2021). Character and environmental lability of cyanobacteria-derived dissolved organic matter. Limnology and Oceanography. 66 , 496-509
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Abstract

Autotrophic dissolved organic matter (DOM) is central to the carbon biogeochemistry of aquatic systems, and the full complexity of autotrophic DOM has not been extensively studied, particularly by high-resolution mass spectrometry (HRMS). Terrestrial DOM tends to dominate HRMS studies in freshwaters due to the propensity of such compounds to ionize by negative mode electrospray, and possibly also because ionizable DOM produced by autotrophy is decreased to low steady-state concentrations by heterotrophic bacteria. In this study, we investigated the character of DOM produced by the widespread cyanobacteriaMicrocystis aeruginosausing high-pressure liquid chromatography-electrospray ionization-high-resolution mass spectrometry.M. aeruginosaproduced thousands of detectable compounds in axenic culture. These compounds were chromatographically resolved and the majority were assigned to aliphatic formulas with a broad polarity range. We found that the DOM produced byM. aeruginosawas highly susceptible to removal by heterotrophic freshwater bacteria, supporting the hypothesis that this autotroph-derived organic material is highly labile and accordingly only seen at low concentrations in natural settings.

Authors/Creators:Patriarca, Claudia and Sedano-Nunez, Vicente T. and Garcia, Sarahi L. and Bergquist, Jonas and Bertilsson, Stefan and Sjoberg, Per J. R. and Tranvik, Lars J. and Hawkes, Jeffrey A.
Title:Character and environmental lability of cyanobacteria-derived dissolved organic matter
Series Name/Journal:Limnology and Oceanography
Year of publishing :2021
Volume:66
Page range:496-509
Number of Pages:14
Publisher:WILEY
ISSN:0024-3590
Language:English
Publication Type:Journal article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 105 Earth and Related Environmental Sciences > Geochemistry
(A) Swedish standard research categories 2011 > 1 Natural sciences > 105 Earth and Related Environmental Sciences > Oceanography, Hydrology, Water Resources
URN:NBN:urn:nbn:se:slu:epsilon-p-108417
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-108417
Additional ID:
Type of IDID
DOI10.1002/lno.11619
Web of Science (WoS)000577965400001
ID Code:22728
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Dept. of Aquatic Sciences and Assessment
Deposited By: SLUpub Connector
Deposited On:09 Mar 2021 17:23
Metadata Last Modified:09 Mar 2021 17:31

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