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dc.contributor.authorXie, Huixiang  Concept link
dc.contributor.authorZafiriou, Oliver C.  Concept link
dc.contributor.authorUmile, Thomas P.  Concept link
dc.contributor.authorKieber, David J.  Concept link
dc.date.accessioned2011-04-21T18:37:06Z
dc.date.available2011-04-21T18:37:06Z
dc.date.issued2005-04-13
dc.identifier.citationMarine Ecology Progress Series 290 (2005): 1-14en_US
dc.identifier.urihttps://hdl.handle.net/1912/4493
dc.descriptionAuthor Posting. © Inter-Research, 2005. This article is posted here by permission of Inter-Research for personal use, not for redistribution. The definitive version was published in Marine Ecology Progress Series 290 (2005): 1-14, doi:10.3354/meps290001.en_US
dc.description.abstractMicrobial consumption is the dominant sink of oceanic carbon monoxide (CO), one of the major carbon-containing photoproducts of chromophoric dissolved organic matter in marine waters. This study presents first-order microbial CO consumption rate constants (kCO) determined using whole-water dark incubations in summer and fall in diverse marine ecosystems covering the Delaware Bay, NW Atlantic, and Beaufort Sea. The microbial CO consumption rate constant, kCO (mean ± SD) was 1.11 ± 0.76 h–1 in the Delaware Bay, 0.33 ± 0.26 h–1 in the coastal Atlantic, 0.099 ± 0.054 h–1 in the open Atlantic, 0.040 ± 0.012 h–1 in the coastal Beaufort Sea and 0.020 ± 0.0060 h–1 in the offshore Beaufort Sea. The kCO in the Delaware Bay covaried with chlorophyll a concentration ([chl a]), rising with increasing salinity in the range 0 to 19 and diminishing with further increasing salinity. The kCO in the Beaufort Sea is significantly positively correlated with [chl a]. Both the Atlantic and cross-system data sets showed significant positive correlations between kCO and the product of [chl a] and water temperature, suggesting that [chl a] can be used as an indicator of CO-consuming bacterial activity in the areas and seasons sampled in this study. Microbial CO consumption was shown to follow Wright-Hobbie kinetics, with variable but low half-saturation concentrations: ~1 nM in the Beaufort Sea and Gulf Stream and 2 to 18 nM in the coastal NW Atlantic. These low half-saturation concentrations suggest that microbial CO consumption in seawater is at times partly saturated, and that some previous microbial CO consumption rates determined with the commonly used 14CO method could be underestimates due to the addition of 14CO as a tracer substrate. The present study provides valuable data for coastal and Arctic waters whose kCO values are poorly or not constrained, including extensive data on the dependence of kCO on the concentration of CO.en_US
dc.description.sponsorshipT.P.U. was supported on an NSF REU grant (CHE-0243959, D.J.K) for a summer studentship on the RV ‘Endeavor’ 384 cruise. This study was supported by FQNT and NSERC grants (H.X.), and by NSF grants OCE-0223200 (O.C.Z.) and OCE-0096413 (D.J.K.).en_US
dc.format.mimetypeapplication/pdf
dc.language.isoenen_US
dc.publisherInter-Researchen_US
dc.relation.urihttps://doi.org/10.3354/meps290001
dc.subjectCarbon monoxideen_US
dc.subjectMicrobial consumptionen_US
dc.subjectWright-Hobbie kineticsen_US
dc.subjectMarine watersen_US
dc.titleBiological consumption of carbon monoxide in Delaware Bay, NW Atlantic and Beaufort Seaen_US
dc.typeArticleen_US
dc.identifier.doi10.3354/meps290001


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