دورية أكاديمية
Spatial Heterogeneity in Particle-Associated, Light-Independent Superoxide Production Within Productive Coastal Waters.
| العنوان: | Spatial Heterogeneity in Particle-Associated, Light-Independent Superoxide Production Within Productive Coastal Waters. |
|---|---|
| المؤلفون: | Sutherland KM; Department of Marine Chemistry and Geochemistry Woods Hole Oceanographic Institution Woods Hole MA USA.; Department of Earth, Atmospheric and Planetary Science Massachusetts Institute of Technology Cambridge MA USA.; Now at Department of Earth and Planetary Science Harvard University Cambridge MA USA., Grabb KC; Department of Marine Chemistry and Geochemistry Woods Hole Oceanographic Institution Woods Hole MA USA.; Department of Earth, Atmospheric and Planetary Science Massachusetts Institute of Technology Cambridge MA USA., Karolewski JS; Department of Marine Chemistry and Geochemistry Woods Hole Oceanographic Institution Woods Hole MA USA.; Department of Earth, Atmospheric and Planetary Science Massachusetts Institute of Technology Cambridge MA USA., Plummer S; Skidaway Institute of Oceanography, Department of Marine Sciences University of Georgia Savannah GA USA.; Now at Scripps Institution of Oceanography University of California, San Diego La Jolla CA USA., Farfan GA; Department of Mineral Sciences Smithsonian Institution Washington DC USA., Wankel SD; Department of Marine Chemistry and Geochemistry Woods Hole Oceanographic Institution Woods Hole MA USA., Diaz JM; Skidaway Institute of Oceanography, Department of Marine Sciences University of Georgia Savannah GA USA.; Now at Scripps Institution of Oceanography University of California, San Diego La Jolla CA USA., Lamborg CH; Ocean Sciences Department University of California Santa Cruz CA USA., Hansel CM; Department of Marine Chemistry and Geochemistry Woods Hole Oceanographic Institution Woods Hole MA USA. |
| المصدر: | Journal of geophysical research. Oceans [J Geophys Res Oceans] 2020 Oct; Vol. 125 (10), pp. e2020JC016747. Date of Electronic Publication: 2020 Oct 16. |
| نوع المنشور: | Journal Article |
| اللغة: | English |
| بيانات الدورية: | Publisher: Wiley Subscription Services, Inc Country of Publication: United States NLM ID: 101661779 Publication Model: Print-Electronic Cited Medium: Print ISSN: 2169-9275 (Print) Linking ISSN: 21699275 NLM ISO Abbreviation: J Geophys Res Oceans Subsets: PubMed not MEDLINE |
| أسماء مطبوعة: | Original Publication: Hoboken, NJ : Wiley Subscription Services, Inc., 2013- |
| مستخلص: | In the marine environment, the reactive oxygen species (ROS) superoxide is produced through a diverse array of light-dependent and light-independent reactions, the latter of which is thought to be primarily controlled by microorganisms. Marine superoxide production influences organic matter remineralization, metal redox cycling, and dissolved oxygen concentrations, yet the relative contributions of different sources to total superoxide production remain poorly constrained. Here we investigate the production, steady-state concentration, and particle-associated nature of light-independent superoxide in productive waters off the northeast coast of North America. We find exceptionally high levels of light-independent superoxide in the marine water column, with concentrations ranging from 10 pM to in excess of 2,000 pM. The highest superoxide concentrations were particle associated in surface seawater and in aphotic seawater collected meters off the seafloor. Filtration of seawater overlying the continental shelf lowered the light-independent, steady-state superoxide concentration by an average of 84%. We identify eukaryotic phytoplankton as the dominant particle-associated source of superoxide to these coastal waters. We contrast these measurements with those collected at an off-shelf station, where superoxide concentrations did not exceed 100 pM, and particles account for an average of 40% of the steady-state superoxide concentration. This study demonstrates the primary role of particles in the production of superoxide in seawater overlying the continental shelf and highlights the importance of light-independent, dissolved-phase reactions in marine ROS production. (©2020. The Authors.) |
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| فهرسة مساهمة: | Keywords: extracellular superoxide; light‐independent ROS; reactive oxygen species |
| تواريخ الأحداث: | Date Created: 20201207 Latest Revision: 20240330 |
| رمز التحديث: | 20240330 |
| مُعرف محوري في PubMed: | PMC7685101 |
| DOI: | 10.1029/2020JC016747 |
| PMID: | 33282615 |
| قاعدة البيانات: | MEDLINE |
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