FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2008004513> ?p ?o ?g. }

• W2008004513 endingPage "716" @default.
• W2008004513 startingPage "701" @default.
• W2008004513 abstract "A comprehensive investigation of the nitrogen cycle in the Delaware River was carried out using 15N tracers to measure rates for important transformations of nitrogen. Daily, depth-averaged 15N rates for the principal inorganic nitrogen species were consistent with rates derived from longitudinal profiles of concentration in the river. The data indicated that nitrification was a rapid, irreversible sink for NH4+, with export of the product N03from the study area. Utilization of NO,by primary producers was negligible, owing to low irradiance levels and to high NH,+ concentrations. The oxygen sag near Philadelphia was found to result from oxygen demand in the water column, with only minor benthic influence. Reaeration provided the major oxygen input. Nitrification accounted for about 1% of the net oxygen demand near Philadelphia but as much as 25% farther downstream. Many rivers and coastal waters act as treatment facilities for large inputs of primary-treated sewage. Microbial processes convert the organic material and inorganic nitrogen to more oxidized forms. Water quality declines owing to low oxygen concentrations, phytoplankton blooms, and high turbidity due to sewage-derived suspended particulate material. Investigation of the nitrogen cycle in such systems must account for the complexity and dynamic nature of the various nitrogen transformations and for the influence of light (Lipschultz et al. 198 5; Stanley and Hobbie 198 1; Dugdale and Goering 1967; Garside 198 l), dissolved oxygen content (Goreau et al. 1980; Lipschultz et al. 198 1; Lipschultz 1984), and flushing rates (Wofsy et al. 198 1). Most investigations of nitrogen cycling have been focused on a restricted subset of metabolic processes, principally phytoplankton uptake of NH,+ and N03-. Recent studies, however, have emphasized the need to expand the number of processes under investigation in order to understand the nitrogen cycle in a system (e.g. see Glibert et al. 1982; Lipschultz et al. 1985; Olson 198 1; McCarthy et al. 1984). We describe here 15N tracer experiments on the Delaware River intended to permit ’ This work was funded by NSF grant BSR 8316359 and by EPA grant R8 10219-01-O to Harvard University. identification of the important processes from an expanded set of nitrogen transformations and to relate the measured rates to observed changes in inorganic nitrogen concentration. Rates were integrated over depth and time to account for their sensitivity to light (Lipschultz et al. 198 5). This permitted quantitative comparisons and identification of the principal processes in the ecosystem. Net production (or loss) rates were then calculated for each inorganic nitrogen species at seven stations along the river near Philadelphia, and net production rates derived from 15N incubations were compared to net rates derived from river concentration data using a mass conservation model. We thank L. Kerkhof for assistance in the laboratory and fieldwork and M. Zahniser for help in design and use of the emission spectrometer." @default.
• W2008004513 created "2016-06-24" @default.
• W2008004513 creator A5047637229 @default.
• W2008004513 creator A5053002887 @default.
• W2008004513 creator A5069473325 @default.
• W2008004513 date "1986-07-01" @default.
• W2008004513 modified "2023-09-25" @default.
• W2008004513 title "Nitrogen metabolism of the eutrophic Delaware River ecosystem1" @default.
• W2008004513 cites W1658815594 @default.
• W2008004513 cites W1972120049 @default.
• W2008004513 cites W1977556702 @default.
• W2008004513 cites W1988449391 @default.
• W2008004513 cites W2012196278 @default.
• W2008004513 cites W2029488351 @default.
• W2008004513 cites W2030279273 @default.
• W2008004513 cites W2049159441 @default.
• W2008004513 cites W2052966285 @default.
• W2008004513 cites W2067722023 @default.
• W2008004513 cites W2076039915 @default.
• W2008004513 cites W2103675067 @default.
• W2008004513 cites W2116177972 @default.
• W2008004513 cites W2148048521 @default.
• W2008004513 cites W2276218939 @default.
• W2008004513 cites W2496839476 @default.
• W2008004513 cites W274594392 @default.
• W2008004513 cites W3097634504 @default.
• W2008004513 doi "https://doi.org/10.4319/lo.1986.31.4.0701" @default.
• W2008004513 hasPublicationYear "1986" @default.
• W2008004513 type Work @default.
• W2008004513 sameAs 2008004513 @default.
• W2008004513 citedByCount "82" @default.
• W2008004513 countsByYear W20080045132012 @default.
• W2008004513 countsByYear W20080045132013 @default.
• W2008004513 countsByYear W20080045132014 @default.
• W2008004513 countsByYear W20080045132015 @default.
• W2008004513 countsByYear W20080045132016 @default.
• W2008004513 countsByYear W20080045132017 @default.
• W2008004513 countsByYear W20080045132018 @default.
• W2008004513 countsByYear W20080045132020 @default.
• W2008004513 countsByYear W20080045132021 @default.
• W2008004513 countsByYear W20080045132022 @default.
• W2008004513 crossrefType "journal-article" @default.
• W2008004513 hasAuthorship W2008004513A5047637229 @default.
• W2008004513 hasAuthorship W2008004513A5053002887 @default.
• W2008004513 hasAuthorship W2008004513A5069473325 @default.
• W2008004513 hasBestOaLocation W20080045131 @default.
• W2008004513 hasConcept C107872376 @default.
• W2008004513 hasConcept C142796444 @default.
• W2008004513 hasConcept C178790620 @default.
• W2008004513 hasConcept C185592680 @default.
• W2008004513 hasConcept C186699998 @default.
• W2008004513 hasConcept C18903297 @default.
• W2008004513 hasConcept C39432304 @default.
• W2008004513 hasConcept C49045045 @default.
• W2008004513 hasConcept C537208039 @default.
• W2008004513 hasConcept C86803240 @default.
• W2008004513 hasConceptScore W2008004513C107872376 @default.
• W2008004513 hasConceptScore W2008004513C142796444 @default.
• W2008004513 hasConceptScore W2008004513C178790620 @default.
• W2008004513 hasConceptScore W2008004513C185592680 @default.
• W2008004513 hasConceptScore W2008004513C186699998 @default.
• W2008004513 hasConceptScore W2008004513C18903297 @default.
• W2008004513 hasConceptScore W2008004513C39432304 @default.
• W2008004513 hasConceptScore W2008004513C49045045 @default.
• W2008004513 hasConceptScore W2008004513C537208039 @default.
• W2008004513 hasConceptScore W2008004513C86803240 @default.
• W2008004513 hasIssue "4" @default.
• W2008004513 hasLocation W20080045131 @default.
• W2008004513 hasOpenAccess W2008004513 @default.
• W2008004513 hasPrimaryLocation W20080045131 @default.
• W2008004513 hasRelatedWork W154366285 @default.
• W2008004513 hasRelatedWork W1963672828 @default.
• W2008004513 hasRelatedWork W1995413311 @default.
• W2008004513 hasRelatedWork W2242238101 @default.
• W2008004513 hasRelatedWork W2624422538 @default.
• W2008004513 hasRelatedWork W2892124633 @default.
• W2008004513 hasRelatedWork W3118026051 @default.
• W2008004513 hasRelatedWork W3147185328 @default.
• W2008004513 hasRelatedWork W3191800842 @default.
• W2008004513 hasRelatedWork W4312130167 @default.
• W2008004513 hasVolume "31" @default.
• W2008004513 isParatext "false" @default.
• W2008004513 isRetracted "false" @default.
• W2008004513 magId "2008004513" @default.
• W2008004513 workType "article" @default.