scholarly journals Controls on the distribution of fluorescent dissolved organic matter during an under-ice algal bloom in the western Arctic Ocean

2017 ◽  
Vol 31 (7) ◽  
pp. 1118-1140 ◽  
Author(s):  
Wilson G. Mendoza ◽  
Elliot L. Weiss ◽  
Brian Schieber ◽  
B. Greg Mitchell
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Arctic Ocean ◽  
Algal Bloom ◽  
Western Arctic Ocean ◽  
Fluorescent Dissolved Organic Matter ◽  
Western Arctic

scholarly journals Dissolved organic matter composition and bioavailability reflect ecosystem productivity in the Western Arctic Ocean

2012 ◽  
Vol 9 (7) ◽  
pp. 9571-9601 ◽  
Author(s):  
Y. Shen ◽  
C. G. Fichot ◽  
R. Benner
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Arctic Ocean ◽  
Surface Waters ◽  
Microbial Growth ◽  
Chukchi Sea ◽  
Ecosystem Productivity ◽  
Western Arctic Ocean ◽  
Western Arctic ◽  
High Yields

Abstract. Dissolved organic carbon (DOC) and total dissolved amino acids (TDAA) were measured in high (Chukchi Sea) and low (Beaufort Sea) productivity regions of the Western Arctic Ocean to investigate the composition and bioavailability of dissolved organic matter (DOM). Concentrations and DOC-normalized yields of TDAA in Chukchi surface waters were relatively high, indicating an accumulation of bioavailable DOM. High yields of TDAA were also observed in the upper halocline of slope and basin waters, indicating off-shelf transport of bioavailable DOM from the Chukchi Sea. In contrast, concentrations and yields of TDAA in Beaufort surface waters were relatively low, indicting DOM was of limited bioavailability. Yields of TDAA in the upper halocline of slope and basin waters were also low, suggesting the Beaufort is not a major source of bioavailable DOM to slope and basin waters. In shelf waters of both systems, elevated concentrations and yields of TDAA were often observed in waters with higher chlorophyll concentrations and productivity. Surface concentrations of DOC were similar (p > 0.05) in the two systems despite the contrasting productivity, but concentrations and yields of TDAA were significantly higher (p < 0.0001) in the Chukchi than in the Beaufort. Unlike bulk DOC, TDAA concentrations and yields reflect ecosystem productivity in the Western Arctic. The occurrence of elevated bioavailable DOM concentrations in the Chukchi implies an uncoupling between the biological production and utilization of DOM and has important implications for sustaining heterotrophic microbial growth and diversity in oligotrophic waters of the Central Arctic basins.

scholarly journals Dissolved organic matter composition and bioavailability reflect ecosystem productivity in the Western Arctic Ocean

2012 ◽  
Vol 9 (12) ◽  
pp. 4993-5005 ◽  
Author(s):  
Y. Shen ◽  
C. G. Fichot ◽  
R. Benner
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Arctic Ocean ◽  
Surface Waters ◽  
Microbial Growth ◽  
Chukchi Sea ◽  
Ecosystem Productivity ◽  
Western Arctic Ocean ◽  
Western Arctic ◽  
High Concentrations

Abstract. Dissolved organic carbon (DOC) and total dissolved amino acids (TDAA) were measured in high (Chukchi Sea) and low (Beaufort Sea) productivity regions of the western Arctic Ocean to investigate the composition and bioavailability of dissolved organic matter (DOM). Concentrations and DOC-normalized yields of TDAA in Chukchi surface waters were relatively high, indicating an accumulation of bioavailable DOM. High concentrations and yields of TDAA were also observed in the upper halocline of slope and basin waters, indicating off-shelf transport of bioavailable DOM from the Chukchi Sea. In contrast, concentrations and yields of TDAA in Beaufort surface waters were relatively low, indicting DOM was of limited bioavailability. Concentrations and yields of TDAA in the upper halocline of slope and basin waters were also low, suggesting the Beaufort is not a major source of bioavailable DOM to slope and basin waters. In shelf waters of both systems, elevated concentrations and yields of TDAA were often observed in waters with higher chlorophyll concentrations and productivity. Surface concentrations of DOC were similar (p > 0.05) in the two systems despite the contrasting productivity, but concentrations and yields of TDAA were significantly higher (p < 0.0001) in the Chukchi than in the Beaufort. Unlike bulk DOC, TDAA concentrations and yields reflect ecosystem productivity in the western Arctic. The occurrence of elevated bioavailable DOM concentrations in the Chukchi Sea implies an uncoupling between the biological production and utilization of DOM and has important implications for sustaining heterotrophic microbial growth and diversity in oligotrophic waters of the central Arctic basins.

scholarly journals Metaproteomics reveal that rapid perturbations in organic matter prioritize functional restructuring over taxonomy in western Arctic Ocean microbiomes

2019 ◽  
Vol 14 (1) ◽  
pp. 39-52 ◽  
Author(s):  
Molly P. Mikan ◽  
H. Rodger Harvey ◽  
Emma Timmins-Schiffman ◽  
Michael Riffle ◽  
Damon H. May ◽  
...  
Keyword(s):  
Organic Matter ◽  
Arctic Ocean ◽  
Western Arctic Ocean ◽  
Western Arctic

scholarly journals Production of fluorescent dissolved organic matter in Arctic Ocean sediments

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
Meilian Chen ◽  
Ji-Hoon Kim ◽  
Seung-Il Nam ◽  
Frank Niessen ◽  
Wei-Li Hong ◽  
...  
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Arctic Ocean ◽  
Fluorescent Dissolved Organic Matter

scholarly journals Compositional differences of fluorescent dissolved organic matter in Arctic Ocean spring sea ice and surface waters north of Svalbard

2020 ◽  
Vol 227 ◽  
pp. 103893
Author(s):  
Monika Zabłocka ◽  
Piotr Kowalczuk ◽  
Justyna Meler ◽  
Ilka Peeken ◽  
Katarzyna Dragańska-Deja ◽  
...  
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Sea Ice ◽  
Arctic Ocean ◽  
Surface Waters ◽  
Fluorescent Dissolved Organic Matter ◽  
Spring Sea Ice
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