Spatial gradients in dissolved carbon due to tidal marsh outwelling into a Chesapeake Bay estuary

Tzortziou, M.; Neale, Patrick J.; Megonigal, J. Patrick; Pow, Crystal Lee; Butterworth, Megan

doi:10.3354/meps09017

Cited by 79 publications

(71 citation statements)

References 52 publications

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“…It is well demonstrated that wetlands are hot spots for DOM export off the landscape. This is true for both inland (Junk et al, 2013;Kortelainen, 1993;Mulholland and Kuenzler, 1979;Raymond and Hopkinson, 2003) and coastal wetlands (Jiang et al, 2013;Raymond and Hopkinson, 2003;Tzortziou et al, 2011). Both classes of wetlands continue to be lost to other land uses globally (Dahl, 1990;Junk et al, 2013;McLeod et al, 2011;Waycott et al, 2009).…”

Section: A Fluxesmentioning

confidence: 94%

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Riverine DOM

Raymond

Spencer

2015

Biogeochemistry of Marine Dissolved Organic Matter

121

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Section: A Fluxesmentioning

confidence: 94%

“…Within rivers there can be large additions from submerged and emergent wetlands (Tzortziou et al, 2011;Wetzel, 1992). Phytoplankton also exude a significant percentage of gross primary production as DOM (Baines and Pace, 1991b), which is often detected in river waters (Massicotte and Frenette, 2011;Raymond and Bauer, 2001a).…”

Section: Land Transportmentioning

confidence: 99%

Riverine DOM

Raymond

Spencer

2015

Biogeochemistry of Marine Dissolved Organic Matter

121

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“…One approach to identifying sources of OM in DOM is to examine the optical properties of chromophoric dissolved OM (CDOM) using fluorescence spectroscopy coupled with parallel factor analysis (PARAFAC). Fluorescence excitation emission matrix (EEM) spectroscopy coupled with PARAFAC has been successfully applied to a wide array of coastal systems to identify terrestrial, marine, and anthropogenic components of DOM (Osburn & Stedmon 2011, Stedmon & Markager 2005, Tzortziou et al 2011.…”

Section: Dissolved Organic Mattermentioning

confidence: 99%

Sources, Ages, and Alteration of Organic Matter in Estuaries

Canuel

Hardison

2016

Annu. Rev. Mar. Sci.

184

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Understanding the processes influencing the sources and fate of organic matter (OM) in estuaries is important for quantifying the contributions of carbon from land and rivers to the global carbon budget of the coastal ocean. Estuaries are sites of high OM production and processing, and understanding biogeochemical processes within these regions is key to quantifying organic carbon (Corg) budgets at the land-ocean margin. These regions provide vital ecological services, including nutrient filtration and protection from floods and storm surge, and provide habitat and nursery areas for numerous commercially important species. Human activities have modified estuarine systems over time, resulting in changes in the production, respiration, burial, and export of Corg. Corg in estuaries is derived from aquatic, terrigenous, and anthropogenic sources, with each source exhibiting a spectrum of ages and lability. The complex source and age characteristics of Corg in estuaries complicate our ability to trace OM along the river-estuary-coastal ocean continuum. This review focuses on the application of organic biomarkers and compound-specific isotope analyses to estuarine environments and on how these tools have enhanced our ability to discern natural sources of OM, trace their incorporation into food webs, and enhance understanding of the fate of Corg within estuaries and their adjacent waters.

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“…Eroding marsh sediments are rarely occupied by SAV (Evamaria Koch, personal communication). Marshes also leach materials that can significantly reduce water clarity, including dissolved organic carbon, cDOM, and dissolved inorganic carbon (Tzortziou et al 2008(Tzortziou et al , 2011. The relationship between SAV abundance and percent shoreline marsh is wedgeshaped (Fig.…”

Section: Shoreline Characteristics Affecting Sav Abundancementioning

confidence: 99%

Effects of Shoreline Alteration and Other Stressors on Submerged Aquatic Vegetation in Subestuaries of Chesapeake Bay and the Mid-Atlantic Coastal Bays

Patrick

Weller

et al. 2014

Estuaries and Coasts

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Submerged aquatic vegetation (SAV) provides many important ecosystem functions, but SAV has been significantly reduced in many estuaries. We used spatial-statistical models to identify estuarine shoreline characteristics that explain variations in SAV abundance among subestuaries of the Chesapeake Bay and mid-Atlantic Coastal Bays. We summarized digital spatial data on shoreline construction, shoreline land use, physical characteristics, watershed land cover, and salinity for each subestuary. We related SAVabundance to shoreline characteristics and other stressors using univariate regression and multivariate models. The strongest univariate predictors of SAV abundance were percent shoreline forest, percent shoreline marsh, the percentage of shoreline that is 5-10 m tall, percent riprap, the percentage of subestuary area <2 m deep, percent herbaceous wetland, and percent shrubland. Shoreline marsh, bulkhead, and shoreline forest had different effects on SAV in different salinity zones. Percent riprap shoreline was the most important variable in a regression tree analysis of all the subestuaries, and percent deciduous forest in the watershed was the most important variable in a separate regression tree analysis on the mesohaline subestuaries. Subestuaries with <5.4 % riprap followed a significantly different temporal trajectory than those with >5.4 % riprap. SAV abundance has increased steadily since 1984 in subestuaries with <5.4 % riprap, but has not increased since 1996-1997 in subestuaries with >5.4 % riprap. Some shoreline characteristics interact with larger-scale factors like land cover and salinity zone to affect the distribution of SAV, while the effects of other shoreline characteristics are consistent among subestuaries with different salinities or local watershed land covers. Many shoreline characteristics can be controlled by management decisions, and our results help identify factors that managers should consider in efforts to increase SAV abundance.

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Spatial gradients in dissolved carbon due to tidal marsh outwelling into a Chesapeake Bay estuary

Cited by 79 publications

References 52 publications

Riverine DOM

Riverine DOM

Sources, Ages, and Alteration of Organic Matter in Estuaries

Effects of Shoreline Alteration and Other Stressors on Submerged Aquatic Vegetation in Subestuaries of Chesapeake Bay and the Mid-Atlantic Coastal Bays

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