Variability of organic δ13C and C/N in the Mersey Estuary, U.K. and its implications for sea-level reconstruction studies

The application of δ13C and C/N ratios as indicators of organic carbon sources and paleoenvironmental change of the mangrove ecosystem from Ba Lat Estuary, Red River, Vietnam

“…During decomposition, the rapid growth of bacteria and fungi favor enrichment in the isotopic signature d 13 C of SOC (Robertson and Alongi 1992;Lallier-Verges et al 1998;Bouillon et al 2008b;Kristensen et al 2008b). In addition, the loss of lignins, phenolic polymers more depleted in 13 C relative to the whole plant and accounting for 17-31% of woody plant tissue (Benner et al 1987;Wilson et al 2005b), through leaching (Benner et al 1990) and degradation ) may contribute to the overall enrichment in 13 C. The selective preservation mechanisms can therefore reduce the depletion of d 13 C in bulk SOC and can partly account for the isotopic shifts observed here and in other studies.…”

A multi-proxy evidence for the transition from estuarine mangroves to deltaic freshwater marshes, Southeastern Brazil, due to climatic and sea-level changes during the late Holocene

“…3. a) Diagram illustrating the relationship between δ 13 C and C/N ratio for the different sedimentary facies, according to Lamb et al (2006), Meyers (2003) and Wilson et al (2005). b) δ 15 N vs. δ 13 C values for the different sedimentary facies, according to Cloern et al (2002) and Ogrinc et al (2005). In this context, the pollen data suggest mangrove predominance (Fig.…”

“…The relationship between δ 13 C, δ 15 N and C/N was used to provide information about the origin of organic matter preserved in the coastal environment (Fry et al, 1977;Peterson and Howarth, 1987;Schidlowski et al, 1983;Meyers, 1997Meyers, , 2003Wilson et al, 2005;Lamb et al, 2006).…”

Lipid biomarkers and organic matter carbon isotopes in estuarine sediments as proxies for evaluating seawater intrusion

“…River, estuarine and coastal wetlands link continents and oceans and their sediments are characteristics of tide-dominated environments and preserve information about sea-level changes (Chmura et al, 1987;Wilson et al, 2005a, b;Lamb et al, 2006). Traditionally, microfossils have been widely used to reconstruct past sea-level changes and paleoenvironments in coastal areas (see review by Lamb et al, 2006), but they are susceptible to chemical and mechanical damages, restricting coastal sea level reconstructions (Wilson et al, 2005a). Total organic carbon (TOC) and TOC/TN in the sediment have been used as a tool to track the source of organic matter, and environmental changes in coastal and estuarine regions (Chmura et al, 1987;Choi et al, 2001;Wilson et al, 2005a, b;Lamb et al, 2006Lamb et al, , 2007Kemp et al, 2012).…”