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Sources and transport of land-derived particulate and dissolved organic matter in the Gulf of Mexico (Texas shelf/slope): The use of ligninphenols and loliolides as biomarkers

Sources and transport of land-derived particulate and dissolved organic matter in the Gulf of Mexico (Texas shelf/slope): The use of ligninphenols and

Sources and transport of land-derived particulate and dissolved organic matter in the Gulf of Mexico (Texas shelf/slope): The use of ligninphenols and loliolides as biomarkers   (Citations: 48)
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The fate and transport of terrestrial organic matter across the continental margin in the Gulf of Mexico was studied in 1992 and 1993 using chemical biomarkers. Lignin-phenols were utilized as biomarkers for terrestrial inputs and indicated that much of the terrestrial organic matter inputs were deposited on the shelf/break and slope. The lignin-phenol concentrations (normalized to carbon) in POC, HMW DOC, and sediments in slope waters were considerably higher than at other open ocean sites studied previously. The dominant mechanism for transport of terrestrially-derived POC and HMW DOC across the shelf and slope was hypothesized to be advection of riverine and estuarine discharges through benthic nepheloid layers. Based on loliolide concentrations in the water column, we believe that lateral transport of these materials at the shelf/break (through extensions of benthic nepheloid layers) may have been an important mechanism for the injection of terrestrially-derived organic matter into deep slope waters.
Journal: Organic Geochemistry - ORG GEOCHEM , vol. 27, no. 1, pp. 65-78, 1997
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    • ...Additionally, much work has been done on dissolved OM as an important vector of terrigenous OM transport from watershed throughout the water column of the oceans (Bianchi et al. 1997; Opsahl and Benner 1997; Benner et al. 2005; Hernes and Benner 2006; Tesi et al. 2007) and river ecosystems (Hedges et al. 1994; Hedges et al. 2000; Benner and Opsahl 2001)...

    Jean-François Ouelletet al. Lignin biomarkers as tracers of mercury sources in lakes water column

    • ...Previous studies have found greater allochthonous contributions inshore by the Mississippi River mouth (Hedges and Parker, 1976; Gearing et al., 1977; Bianchi et al., 1997; Gon ˜ i et al., 1998; Gordon and Gon ˜ i, 2004; Mead and Gon ˜ i, 2006)...
    • ...Consistent with the study by Gon ˜ i et al., Bianchi et al. (1997) found non-woody angiosperms were the dominant form of vascular plant material transported to sediments in deeper regions of the Gulf of Mexico (i.e., Texas shelf)...

    Elizabeth J. Watersonet al. Sources of sedimentary organic matter in the Mississippi River and adj...

    • ...In the Gulf of Mexico, loliolides, which are formed only in sediments, have been measured in the water column at depths that preclude simple diffusion (Bianchi et al., 1997)...

    Peter J. Herneset al. Terrigenous organic matter sources and reactivity in the North Atlanti...

    • ...Copper Complexation. There are three main proposed origins of copper binding ligands in natural environments: (1) production in response to copper stress by algae or other organisms [19, 21, 36]; (2) components of natural dissolved or colloidal organic matter [4, 24, 29, 46, 63, 64]; or (3) components of clays and other suspended particulate matter [2, 12, 17, 26, 30]...

    Thomas J. Boydet al. Effects of Dissolved and Complexed Copper on Heterotrophic Bacterial P...

    • ...Although small in absolute magnitude, riverine export of TOC is an important potential long-term sink for TOC in reservoirs [Josette et al., 1999; Smith et al., 2001] and coastal sediments [Hedges and Oades, 1997] and can influence estuarine and coastal marine productivity [Bianchi et al., 1997; Findlay et al., 1998; Sigleo and Macko, 2002]...

    Brent J. Dalzellet al. Flood pulse influences on terrestrial organic matter export from an ag...

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