Variations in organic matter composition in sediments from Lake Huguang Maar (Huguangyan), south China during the last 68 ka: implications for environmental and climatic change

The temporal dynamics of terrestrial organic matter transfer to the oceans : initial assessment and application

“…applications of compound-specific stable carbon isotope analysis has been the assignment of biomarker source, since 13 C is discriminated against differently under different biosynthetic and environmental conditions (Hayes 1993(Hayes , 2001. For example, the -14 %/o difference in stable carbon isotopic (813C) compositions of lipids from C 3 or C 4 plants has been successfully used to trace continental aridity and OC inputs in marine (Bird et al, 1995;Naraoka and Ishiwatari, 2000;Rommerskirchen et al, 2006), estuarine (Shi et al, 2001), and lacustrine (Rieley et al, 1991;Huang et al, 1999;Fisher et al, 2003;Fuhrmann et al, 2003) sediments.…”

Seasonal variability in concentrations and fluxes of glycerol dialkyl glycerol tetraethers in Huguangyan Maar Lake, SE China: Implications for the applicability of the MBT–CBT paleotemperature proxy in lacustrine settings

“…Its geographical, geomorphological and hydrological features, and high-resolution well bedded sediments have a great potential for the investigation of the evolution of Asian monsoon (Fuhrmann et al, 2003;Mingram et al, 2004;Wang et al, 2007;Yancheva et al, 2007;Wu et al, 2012) in the subtropical South China. For this region therefore, the development of new proxies and the integration of multiple independent approaches for reliable continental temperature estimates are of great importance.…”

Late Quaternary environmental and climatic changes in central Europe as inferred from the composition of organic matter in annually laminated maar lake sediments

“…The Oscillatoria sample has the most negative d 13 C value of À34.1% and a low TOC/TN ratio of 6.2. A wide range of isotopic values between À24.0 and À36.0% were previously determined for POM (cyanobacteria are part of this value and show also several per mil variations) in HZM which reflect seasonal fluctuations of the autochthonous population [Lücke et al, 2003]. The submerged macrophyte Ranunculus has the most positive d 13 C value of À20.2% and a TOC/TN ratio of 18.0, while the emergent macrophyte Carex gracilis (À27.7% and 26.0) falls in the C 3 land plant field of Meyers and Lallier-Vergès [1999].…”

“…The establishment of woodland around the lake during the Preboreal and the Boreal is documented by an increasing amount of lignin derived components in MFM at 10,035 varve years B.P. With the exception of the transition from the Pleniglacial to the Lateglacial, changes in the carbon isotopic composition are reported to reflect changes in the aquatic primary productivity [Lücke et al, 2003]. Thus d 13 C TOC values mainly below À30% during the Holocene document an increasingly dominant input of organic carbon derived from autochthonous OM.…”

“…Naturally occurring macromolecules such as polysaccharides, proteins, and lignins are important constituents of living organisms [de Leeuw and Largeau, 1993]. Although a very limited number of studies is available so far, they indicate that the geochemical composition of this quantitatively most important OM fraction provides valuable information about sources and degradation processes in lake environments [e.g., Bourdon et al, 2000;Fuhrmann et al, 2003]. …”