Increasing dissolved organic carbon concentrations in northern boreal lakes: Implications for lake water transparency and thermal structure

2017 ◽  
Vol 122 (5) ◽  
pp. 1022-1035 ◽  
Author(s):  
Kristin E. Strock ◽  
Nora Theodore ◽  
William G. Gawley ◽  
Alan C. Ellsworth ◽  
Jasmine E. Saros
Keyword(s):  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Lake Water ◽  
Thermal Structure ◽  
Boreal Lakes ◽  
Water Transparency ◽  
Carbon Concentrations

Dissolved organic carbon concentrations and fluxes along the Moisie River, Quebec

1990 ◽  
Vol 24 (1) ◽  
pp. 35-42 ◽  
Author(s):  
T. E. FORD ◽  
S. A. FORD ◽  
M. A. LOCK ◽  
R. J. NAIMAN
Keyword(s):  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Carbon Concentrations

scholarly journals Characterization of bacterioplankton communities and quantification of organic carbon pools off the Galapagos Archipelago under contrasting environmental conditions

PeerJ ◽  
2018 ◽  
Vol 6 ◽  
pp. e5984 ◽  
Author(s):  
Nataly Carolina Guevara Campoverde ◽  
Christiane Hassenrück ◽  
Pier Luigi Buttigieg ◽  
Astrid Gärdes
Keyword(s):  
Organic Carbon ◽  
Carbon Cycle ◽  
Dissolved Organic Carbon ◽  
Bacterial Communities ◽  
Carbon Pools ◽  
Aggregate Formation ◽  
Galapagos Archipelago ◽  
Carbon Concentrations ◽  
Bacterioplankton Communities

Bacteria play a crucial role in the marine carbon cycle, contributing to the production and degradation of organic carbon. Here, we investigated organic carbon pools, aggregate formation, and bacterioplankton communities in three contrasting oceanographic settings in the Galapagos Archipelago. We studied a submarine CO2 vent at Roca Redonda (RoR), an upwelling site at Bolivar Channel (BoC) subjected to a weak El Niño event at the time of sampling in October 2014, as well as a site without volcanic or upwelling influence at Cowley Islet (CoI). We recorded physico-chemical parameters, and quantified particulate and dissolved organic carbon, transparent exopolymeric particles, and the potential of the water to form larger marine aggregates. Free-living and particle-attached bacterial communities were assessed via 16S rRNA gene sequencing. Both RoR and BoC exhibited temperatures elevated by 1–1.5 °C compared to CoI. RoR further experienced reduced pH between 6.8 and 7.4. We observed pronounced differences in organic carbon pools at each of the three sites, with highest dissolved organic carbon concentrations at BoC and RoR, and highest particulate organic carbon concentrations and aggregate formation at BoC. Bacterioplankton communities at BoC were dominated by opportunistic copiotrophic taxa, such as Alteromonas and Roseobacter, known to thrive in phytoplankton blooms, as opposed to oligotrophic taxa dominating at CoI, such as members of the SAR11 clade. Therefore, we propose that bacterial communities were mainly influenced by the availability of organic carbon at the investigated sites. Our study provides a comprehensive characterization of organic carbon pools and bacterioplankton communities, highlighting the high heterogeneity of various components of the marine carbon cycle around the Galapagos Archipelago.

Hydro-climatic forcing of dissolved organic carbon in two boreal lakes of Canada

2016 ◽  
Vol 571 ◽  
pp. 50-58 ◽  
Author(s):  
Nazzareno Diodato ◽  
Scott Higgins ◽  
Gianni Bellocchi ◽  
Francesco Fiorillo ◽  
Nunzio Romano ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Boreal Lakes ◽  
Climatic Forcing

scholarly journals Reactivity continuum of dissolved organic carbon decomposition in lake water

2012 ◽  
Vol 117 (G1) ◽  
Author(s):  
Birgit Koehler ◽  
Eddie von Wachenfeldt ◽  
Dolly Kothawala ◽  
Lars J. Tranvik
Keyword(s):  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Lake Water ◽  
Carbon Decomposition ◽  
Reactivity Continuum

Modeling Allochthonous Dissolved Organic Carbon Mineralization Under Variable Hydrologic Regimes in Boreal Lakes

Ecosystems ◽  
2016 ◽  
Vol 20 (4) ◽  
pp. 781-795 ◽  
Author(s):  
Dominic Vachon ◽  
Yves T. Prairie ◽  
François Guillemette ◽  
Paul A. del Giorgio
Keyword(s):  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Carbon Mineralization ◽  
Boreal Lakes ◽  
Hydrologic Regimes ◽  
Organic Carbon Mineralization
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