Assessing source contributions to particulate organic matter in a subtropical estuary: A biomarker approach

Mead, Ralph N.; Belicka, Laura L.; Pisani, Oliva; Jaffé, Rudolf

doi:10.1016/j.orggeochem.2014.06.012

Cited by 55 publications

(41 citation statements)

References 76 publications

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“…Because this estimate was based on biomarker and POM data from the mid-estuary, where the POM concentration and the mangrove contribution to POM are both likely to be much higher than either toward the freshwater end-member or the marine end-member, it is likely an overestimate of the mangrove-derived POC flux. Nevertheless, the mangrove-derived POC flux determined by He et al (2014) is still only a small fraction (3 to 7 %) of the mangrove-derived dissolved carbon fluxes in Shark River during SharkTREx 1 and 2.…”

Section: Distribution Of Carbon Fluxesmentioning

confidence: 96%

“…However, He et al (2014) estimated the mangrove-derived POC flux in Shark River by taking the total volume discharge from the five major rivers along the southwest coast of Everglades National Park from 2004 to 2008, and assuming that Shark River contributed 14 % to the mean annual discharge. They then multiplied this discharge by the average POM concentration (5.20 ± 0.614 mg L −1 ) in the middle of the estuary to yield an annual POM flux from Shark River.…”

Section: Distribution Of Carbon Fluxesmentioning

confidence: 99%

“…They then multiplied this discharge by the average POM concentration (5.20 ± 0.614 mg L −1 ) in the middle of the estuary to yield an annual POM flux from Shark River. Based on analysis of organic matter biomarkers, He et al (2014) estimated that mangrove-derived POM was 70-90 % of the total POM pool in the Shark River. Using this contribution and further assuming that 58 % of POM weight is POC (Howard, 1965), they estimated a POC flux of 1.0 to 2.2 × 10 4 mol d −1 .…”

Section: Distribution Of Carbon Fluxesmentioning

confidence: 99%

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Dissolved carbon biogeochemistry and export in mangrove-dominated rivers of the Florida Everglades

Ferrón

Engel

et al. 2017

Biogeosciences

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Abstract. The Shark and Harney rivers, located on the southwest coast of Florida, USA, originate in the freshwater, karstic marshes of the Everglades and flow through the largest contiguous mangrove forest in North America. In November 2010 and 2011, dissolved carbon source-sink dynamics was examined in these rivers during SF 6 tracer release experiments. Approximately 80 % of the total dissolved carbon flux out of the Shark and Harney rivers during these experiments was in the form of inorganic carbon, either via air-water CO 2 exchange or longitudinal flux of dissolved inorganic carbon (DIC) to the coastal ocean. Between 42 and 48 % of the total mangrove-derived DIC flux into the rivers was emitted to the atmosphere, with the remaining being discharged to the coastal ocean. Dissolved organic carbon (DOC) represented ca. 10 % of the total mangrove-derived dissolved carbon flux from the forests to the rivers. The sum of mangrove-derived DIC and DOC export from the forest to these rivers was estimated to be at least 18.9 to 24.5 mmol m −2 d −1 , a rate lower than other independent estimates from Shark River and from other mangrove forests.Results from these experiments also suggest that in Shark and Harney rivers, mangrove contribution to the estuarine flux of dissolved carbon to the ocean is less than 10 %.

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Section: Distribution Of Carbon Fluxesmentioning

confidence: 96%

Section: Distribution Of Carbon Fluxesmentioning

confidence: 99%

Section: Distribution Of Carbon Fluxesmentioning

confidence: 99%

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Dissolved carbon biogeochemistry and export in mangrove-dominated rivers of the Florida Everglades

Ferrón

Engel

et al. 2017

Biogeosciences

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“…The export of DOM and POM from plants and salt marshes were proven quite significant (Alongi et al, 2001;Childers et al, 2006;He et al, 2014;. In order to balance the carbon budget, detailed understanding of DOM and POM sources, transformation and dynamics is needed.…”

Section: Significance Of This Studymentioning

confidence: 99%

“…In contrast, the freshwater marshes of the Everglades are depleted in suspended POM as this matter is mainly in the form of flocculent materials (floc; Neto et al, 2006), which although mobile (Larsen et al, 2009) is believed to only minimally contribute to the POM pool in the estuarine zone (He et al, 2014). With respect to the diversity of mangrove functions in OM cycling, mangrove-derived contributions to POM can be geomorphologically variable.…”

Section: Introductionmentioning

confidence: 99%

Sources, Fate and Transformation of Organic Matter in Wetlands and Estuaries

Ya¹

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In this work, DOM characteristics were investigated in different estuaries.Dissolved organic matter source strengths and dynamics were assessed in a seagrassdominated subtropical estuarine lagoon. The primary source of DOM was quantified using the combination of excitation emission matrix fluorescence with parallel factor analysis (EEM-PARAFAC) and stable C isotope analysis. Seagrass can contribute up to 72% of the DOM in the study area. The spatial and temporal variation of DOM dynamics viii was also studied in salt marsh estuary. The data showed that DOM was primarily derived from freshwater marshes and controlled by hydrology while salt marsh plants play a significant role in the distribution patterns of DOM quality and quantity. The OM dynamics was also investigated in a mangrove-dominate estuary and a comparative study was conducted between the DOM and POM pools. The results revealed both similarity and dissimilarity in DOM and POM composition. The dynamics of both OM pools are largely uncoupled as a result of source differences. Fringe mangrove export similar amounts of DOM and POM and should be considered as an important source in coastal C budgets. Lastly, chemical characterizations were conducted on the featured fluorescence component in OM in an attempt to better understand the composition and origins of the specific PARAFAC component. The traditionally defined 'protein-like' fluorescence was found to contain both proteinaceous and phenolic compounds, suggesting that the application of this parameter as a proxy for amino acid content and bioavailability may be limited.

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Compound specific δD and δ13C analyses as a tool for the assessment of hydrological change in a subtropical wetland

Anderson

Jaffé

2016

Aquat Sci

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Assessing source contributions to particulate organic matter in a subtropical estuary: A biomarker approach

Cited by 55 publications

References 76 publications

Dissolved carbon biogeochemistry and export in mangrove-dominated rivers of the Florida Everglades

Dissolved carbon biogeochemistry and export in mangrove-dominated rivers of the Florida Everglades

Sources, Fate and Transformation of Organic Matter in Wetlands and Estuaries

Compound specific δD and δ13C analyses as a tool for the assessment of hydrological change in a subtropical wetland

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