Chemical characteristics of dissolved organic matter in an oligotrophic subtropical wetland/estuarine

Maie, Nagamitsu; Yang, Chang‐Lin; Miyoshi, Toshikazu; Parish, Kathleen; Jaffé, Rudolf

doi:10.4319/lo.2005.50.1.0023

Cited by 69 publications

(88 citation statements)

References 54 publications

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“…The freshwater DOM (river and reservoir DOM) contained much more alkyl C than the seawater DOM (coastal and marine DOM; Fig. 4B), which was also consistent with the other investigations on the alkyl C of HMW DOM in the Chesapeake Bay and the Florida Bay (Abdulla et al, 2010;Maie et al, 2005). The most abundant alkyl C was observed in the reservoir Koprivnjak et al (2009).…”

Section: Comparison Between the Ro Dom And Hmw Domsupporting

confidence: 90%

“…The riverine DOM in this investigation contained much less alkoxyl C (60-109 ppm) than the marine DOM, which was consistent with the comparison of HMW DOM (Abdulla et al, 2010;Maie et al, 2005). The dissimilarity between riverine and marine DOM was likely related to the DOM sources.…”

Section: Comparison Between the Ro Dom And Hmw Domsupporting

confidence: 83%

“…The DOC concentrations of the retentates ranged between 49.2 and 345.9 mg/L, and the volumes of the samples decreased from 388-1067 L to 3-27 L. The DOM yields ranged from 36% to 107%, with a mean value of 74% (Table 1). The yields, except for LHS1, were significantly higher than that of ultrafiltration-isolated DOM (35%) from rivers (Bianchi et al, 2004;Engelhaupt and Bianchi, 2001;Jaffé et al, 2012;Maie et al, 2005). High yields are indicative of the representativeness of the isolated DOM sample.…”

Section: The Role Of Concentration Factor In Dom Isolationmentioning

confidence: 86%

“…Although the sample set is not large, it provides an initial comparison of the total DOM from various aqueous environments. Furthermore, this comparison, combined with the compositional changes of HMW DOM (Abdulla et al, 2010;Maie et al, 2005), exerts an important constraint on size and chemical transformation of DOM. The freshwater DOM (river and reservoir DOM) contained much more alkyl C than the seawater DOM (coastal and marine DOM; Fig.…”

Section: Comparison Between the Ro Dom And Hmw Dommentioning

confidence: 99%

“…Solid-state 13 C NMR experiment can analyze samples non-destructively irrespective of solubility, providing representative DOM structural information (Mao et al, 2012;Zhang et al, 2013Zhang et al, , 2014. Solid-state 13 C NMR spectrum has been extensively used for characterizing DOM from fresh and marine water (Benner et al, 1992;Bianchi et al, 2004;Engelhaupt and Bianchi, 2001;Jaffé et al, 2012;Koprivnjak et al, 2006;Maie et al, 2005;Mao et al, 2012). However, to the best of our knowledge, this technique has not been used for characterizing RO DOM from freshwater.…”

Section: Introductionmentioning

confidence: 99%

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Compositions and constituents of freshwater dissolved organic matter isolated by reverse osmosis

Huang

Ran

Mao

2014

Marine Pollution Bulletin

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a b s t r a c tDissolved organic matter (DOM) from riverine and lacustrine water was isolated using a reverse osmosis (RO) system. Solid-state 13 C nuclear magnetic resonance ( 13 C NMR) was used to quantitatively evaluate the compositions and constituents of DOM, which are compared with previous investigations on marine DOM. Results indicated that concentration factor (CF) was a key metric controlling yield and sorption of DOM on the RO system. The sorption was likely non-selective, based on the 13 C NMR and d 13 C analyses. Carbohydrates and lipids accounted for 25.0-41.5% and 30.2-46.3% of the identifiable DOM, followed by proteins (18.2-19.8%) and lignin (7.17-12.8%). The freshwater DOM contained much higher alkyl and aromatic C but lower alkoxyl and carboxyl C than marine DOM. The structural difference was not completely accounted for by using structure of high molecular weight (HMW) DOM, suggesting a size change involved in transformations of DOM during the transport from rivers to oceans.

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Section: Comparison Between the Ro Dom And Hmw Domsupporting

confidence: 90%

Section: Comparison Between the Ro Dom And Hmw Domsupporting

confidence: 83%

Section: The Role Of Concentration Factor In Dom Isolationmentioning

confidence: 86%

Section: Comparison Between the Ro Dom And Hmw Dommentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Compositions and constituents of freshwater dissolved organic matter isolated by reverse osmosis

Huang

Ran

Mao

2014

Marine Pollution Bulletin

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Colored dissolved organic matter dynamics and anthropogenic influences in a major transboundary river and its coastal wetland

Tzortziou

Zeri

Dimitriou

et al. 2015

Limnology & Oceanography

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Most transboundary rivers and their wetlands are subject to considerable anthropogenic pressures associated with multiple and often conflicting uses. In the Eastern Mediterranean such systems are also particularly vulnerable to climate change, posing additional challenges for integrated water resources management. Comprehensive measurements of the optical signature of colored dissolved organic matter (CDOM) were combined with measurements of river discharges and water physicochemical and biogeochemical properties, to assess carbon dynamics, water quality, and anthropogenic influences in a major transboundary system of the Eastern Mediterranean, the Evros (or, Марица or, Meriç) river and its Ramsar protected coastal wetland. Measurements were performed over three years, in seasons characterized by different hydrologic conditions and along transects extending more than 70 km from the freshwater end‐member to two kilometers offshore in the Aegean Sea. Changes in precipitation, anthropogenic dissolved organic matter (DOM) inputs from the polluted Ergene tributary, and the irregular operation of a dam were key factors driving water quality, salinity regimes, and biogeochemical properties in the Evros delta and coastal waters. Marsh outwelling affected coastal carbon quality, but the influence of wetlands was often masked by anthropogenic DOM contributions. A distinctive five‐peak CDOM fluorescence signature was characteristic of upstream anthropogenic inputs and clearly tracked the influence of freshwater discharges on water quality. Monitoring of this CDOM fluorescence footprint could have direct applications to programs focusing on water quality and environmental assessment in this and other transboundary rivers where management of water resources remains largely ineffective.

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Dissolved inorganic nitrogen fluxes from common Florida Bay (U.S.A.) sponges

Hoer

Tommerdahl

Lindquist

et al. 2018

Limnology & Oceanography

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Sponge biomass represents the largest heterotrophic component of benthic biota in the Florida Bay ecosystem. These organisms can significantly alter the water quality of their surrounding environment through biogeochemical transformations of nutrient elements resulting from their dynamic pumping, water filtration, and respiration processes. Ammonium (NH4+) and nitrate plus nitrite (NO3− + NO2−; NO x−) fluxes were obtained for 11 ecologically important species at three sites within Florida Bay, Florida (U.S.A.) utilizing chamber incubations on undisturbed individual sponges. Significant dissolved inorganic nitrogen (DIN) effluxes ranging between 9.0 ± 2.2 μmol N h−1 Lsponge−1 and 141 ± 26 μmol N h−1 Lsponge−1 were observed for eight of the 11 tested sponges; specifically, from six of eight tested high‐microbial abundance (HMA) sponges, and from two of three tested low‐microbial abundance (LMA) sponges. The abundant HMA species Chondrilla nucula showed the highest, volume‐normalized rate of DIN release. These fluxes represent a continuation of the previously observed dichotomy in the chemical speciation of DIN in exhalent waters of LMA and HMA sponges, with NH4+ and NO x− dominating their respective exhalent jets. Surprisingly, we found that dissolved organic matter (DOM) appeared to make a negligible contribution to the total released N, but we hypothesize that the lack of DOM utilization or production was due to methodological limitations. Our flux data combined with sponge biomass estimates indicate that sponges, particularly HMA species, are a large, and potentially dominant, source of inorganic nitrogen to Florida Bay waters.

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Chemical characteristics of dissolved organic matter in an oligotrophic subtropical wetland/estuarine

Cited by 69 publications

References 54 publications

Compositions and constituents of freshwater dissolved organic matter isolated by reverse osmosis

Compositions and constituents of freshwater dissolved organic matter isolated by reverse osmosis

Colored dissolved organic matter dynamics and anthropogenic influences in a major transboundary river and its coastal wetland

Dissolved inorganic nitrogen fluxes from common Florida Bay (U.S.A.) sponges

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