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dc.contributor.authorRaymond, Peter A.
dc.contributor.authorBohlen, W. Frank
dc.contributor.authorHoward-Strobel, Mary M.
dc.contributor.authorCollins, James Robert
dc.date.accessioned2014-03-21T16:43:49Z
dc.date.available2014-03-21T16:43:49Z
dc.date.issued2012-10
dc.date.submitted2012-09
dc.identifier.issn1559-2723
dc.identifier.issn1559-2731
dc.identifier.urihttp://hdl.handle.net/1721.1/85879
dc.description.abstractBiogeochemical cycles in estuaries are regulated by a diverse set of physical and biological variables that operate over a variety of time scales. Using in situ optical sensors, we conducted a high-frequency time-series study of several biogeochemical parameters at a mooring in central Long Island Sound from May to August 2010. During this period, we documented well-defined diel cycles in nitrate concentration that were correlated to dissolved oxygen, wind stress, tidal mixing, and irradiance. By filtering the data to separate the nitrate time series into various signal components, we estimated the amount of variation that could be ascribed to each process. Primary production and surface wind stress explained 59 and 19 %, respectively, of the variation in nitrate concentrations. Less frequent physical forcings, including large-magnitude wind events and spring tides, served to decouple the relationship between oxygen, nitrate, and sunlight on about one quarter of study days. Daytime nitrate minima and dissolved oxygen maxima occurred nearly simultaneously on the majority (>80 %) of days during the study period; both were strongly correlated with the daily peak in irradiance. Nighttime nitrate maxima reflected a pattern in which surface-layer stocks were depleted each afternoon and recharged the following night. Changes in nitrate concentrations were used to generate daily estimates of new primary production (182 ± 37 mg C m[superscript −2] day[superscript −1]) and the f ratio (0.25), i.e., the ratio of production based on nitrate to total production. These estimates, the first of their kind in Long Island Sound, were compared to values of community respiration, primary productivity, and net ecosystem metabolism, which were derived from in situ measurements of oxygen concentration. Daily averages of the three metabolic parameters were 1,660 ± 431, 2,080 ± 419, and 429 ± 203 mg C m[superscript −2] day[superscript −1], respectively. While the system remained weakly autotrophic over the duration of the study period, we observed very large day-to-day differences in the f ratio and in the various metabolic parameters.en_US
dc.description.sponsorshipYale Institute for Biospheric Studiesen_US
dc.description.sponsorshipYale School of Forestry and Environmental Studiesen_US
dc.language.isoen_US
dc.publisherSpringer-Verlagen_US
dc.relation.isversionofhttp://dx.doi.org/10.1007/s12237-012-9560-5en_US
dc.rightsArticle is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.en_US
dc.sourceCollinsen_US
dc.titleEstimates of New and Total Productivity in Central Long Island Sound from In Situ Measurements of Nitrate and Dissolved Oxygenen_US
dc.typeArticleen_US
dc.identifier.citationCollins, James R., Peter A. Raymond, W. Frank Bohlen, and Mary M. Howard-Strobel. “Estimates of New and Total Productivity in Central Long Island Sound from In Situ Measurements of Nitrate and Dissolved Oxygen.” Estuaries and Coasts 36, no. 1 (January 2013): 74–97.en_US
dc.contributor.departmentMassachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciencesen_US
dc.contributor.departmentWoods Hole Oceanographic Institutionen_US
dc.contributor.approverCollins, James Roberten_US
dc.contributor.mitauthorCollins, James Roberten_US
dc.relation.journalEstuaries and Coastsen_US
dc.eprint.versionAuthor's final manuscripten_US
dc.type.urihttp://purl.org/eprint/type/JournalArticleen_US
eprint.statushttp://purl.org/eprint/status/PeerRevieweden_US
dspace.orderedauthorsCollins, James R.; Raymond, Peter A.; Bohlen, W. Frank; Howard-Strobel, Mary M.en_US
dc.identifier.orcidhttps://orcid.org/0000-0002-5705-9682
mit.licensePUBLISHER_POLICYen_US


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