Photo- and bio-reactivity patterns of dissolved organic matter from biomass and soil leachates and surface waters in a subtropical wetland

Release and Microbial Degradation of Dissolved Organic Carbon and Nitrogen from Phragmites australis and Suaeda salsa in the Wetland of the Yellow River Estuary

“…CDOM is the optically measureable component of DOM and is important for most photochemically-mediated processes in coastal waters [22,23]. It plays important roles in carbon cycle and biogeochemical processes in estuarine and coastal water [24,25].…”

Linking Organic Matter Dynamics to Management, Restoration, and Climate in the Florida Everglades

“…First, PARAFAC components were converted into percentages to remove the seasonal influence of DOC concentration on compositional dynamics . Behavior of individual components has been discussed (e.g., Chen & Jaffé, 2014), and we sought to reduce dataset complexity by grouping PARAFAC components via hierarchical clustering. Data from all sites were clustered using Ward's minimum variance method (Ward, 1963) after data standardization ( Figure 5.2).…”

“…The role of DOM in these processes is a function of its molecular composition, controlled by mixing of allochthonous and authochonous sources including terrestrial plants, soils and microbial inputs , and can consist of thousands of unique chemical formulae (e.g., Stetson et al 2003). DOM composition also dictates susceptibility to biological and photochemical degradation (Cory et al 2014;Chen and Jaffé 2014;Stubbins et al 2016), processes that can affect molecular complexity.…”

“…EEM-PARAFAC has been used to trace changes in DOM source and reactivity (Cory & McKnight, 2005;Stedmon & Markager, 2005;), biological and photochemical processing (Fellman et al 2008;Chen and Jaffé 2014), impacts of land use (Williams et al 2010;) and anthropogenic influence in natural systems (Cawley et al 2012;Shutova et al 2014;Graeber et al 2015). Use of EEM-PARAFAC from the Arctic (Gueguen et al 2013;Walker et al 2013;Mann et al 2016) to the tropics (Cao et al 2016;Lambert et al 2016), and in headwater streams (Yamashita et al 2011;Burrows et al 2013;Hosen et al 2014), major rivers (Walker et al 2013;Cao et al 2016;Lambert et al 2016), wetlands (Fellman et al 2008;Cawley et al 2012;, estuaries (Stedmon & Markager, 2005;Osburn et al 2012;, and coastal and open oceans (Jorgensen et al 2011;Gueguen et al 2013;Kowalczuk et al 2013) (Murphy et al, 2014).…”

Black Carbon: Sources, Mobility and Fate in Freshwater Systems

“…Photo-reactivity of dissolved organic matter (DOM) in surface waters has a significant impact on the composition and quantity of dissolved organic carbon (DOC) transported through aquatic systems (Chen and Jaffé, 2014). Dissolved black carbon (DBC), the soluble portion of pyrogenic OM, is characterized by its polycondensed aromatic ring structure and typically generated by high temperature combustion processes Therefore, the light absorbance of DOM size fractions was also measured to provide complementary support for observed DBC photodegradation processes.…”