Journal ArticleDOI
Applications of organic geochemistry to paleolimnological reconstructions: a summary of examples from the Laurentian Great Lakes
TLDR
The organic matter content of lake sediments contains information that helps to reconstruct past environmental conditions, evaluate histories of climate change, and assess impacts of humans on local ecosystems as discussed by the authors, and serve as proxies of organic matter delivery and accumulation.About:
This article is published in Organic Geochemistry.The article was published on 2003-02-01. It has received 1322 citations till now. The article focuses on the topics: Organic matter & Organic geochemistry.read more
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A novel proxy for terrestrial organic matter in sediments based on branched and isoprenoid tetraether lipids
Ellen C. Hopmans,Johan W.H. Weijers,Enno Schefuß,Lydie Herfort,Jaap S. Sinninghe Damsté,Stefan Schouten +5 more
TL;DR: In this paper, a tracer for terrestrial organic carbon in sediments based on the analysis of tetraether lipids using high-performance liquid chromatography/mass spectrometry (HPLC/MS) was proposed.
Journal ArticleDOI
Palaeoclimatic changes in the Qinghai Lake area during the last 18,000 years
TL;DR: In this article, multi-proxy analysis of a sediment core from Qinghai Lake, including pollen, carbonate, TOC, TN and δ 13 C of organic matter, was used to document regional climatic changes during the last 18,000 years.
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Leaf wax n-alkane distributions in and across modern plants: Implications for paleoecology and chemotaxonomy
TL;DR: It is shown that angiosperms generally produce more n-alkanes than do gymnosperms, and furthermore that CPI values show such variation in modern plants that it is prudent to discard the use of CPI as a quantitative indicator of n-alksane degradation in sediments.
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Hydrogen isotope ratios of recent lacustrine sedimentary n-alkanes record modern climate variability
TL;DR: In this article, the authors measured hydrogen isotope ratios on n-alkanes (n-C12 to n-C31) extracted from recent lake surface sediments along a N-S European transect to test if modern climate variability is recorded in these biomarkers.
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A review of molecular organic proxies for examining modern and ancient lacustrine environments
TL;DR: In this article, the use of a number of commonly utilized organic geochemical and isotopic proxies and their potential for environmental reconstruction in Quaternary lacustrine deposits is discussed.
References
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Stable isotopes in ecosystem studies
Bruce J. Peterson,Brian Fry +1 more
TL;DR: The use of stable isotopes to solve biogeochemical problems in ecosystem analysis is increasing rapidly because stable isotope data can contribute both source-sink (tracer) and process information: the elements C, N, S, H, and all have more than one isotope, and isotopic compositions of natural materials can be measured with great precision with a mass spectrometer as mentioned in this paper.
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Preservation of elemental and isotopic source identification of sedimentary organic matter
TL;DR: The amount and type of organic matter in the sediments of lakes and oceans contribute to their paleoenvironmental and paleoclimatological records as discussed by the authors, but only a small fraction of the initial aquatic organic matter survives destruction and alteration during sinking and sedimentation.
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Leaf Epicuticular Waxes
G. Eglinton,Richard J. Hamilton +1 more
TL;DR: Enzymic studies, radiolabeling, and electron microscopy will be needed to reveal the mode of biogenesis of the wax constituents and their site of formation and subsequent pathway through the cuticle to the leaf surface.
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Guidelines for Evaluating Petroleum Source Rock Using Programmed Pyrolysis
TL;DR: In this article, the authors used pyrolysis to rapidly evaluate the petroleum-generative potential and thermal maturity of rocks and found that most coals showed high S2/S3 (>5) and low HI values (< 300 mg HC/g TOC.
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Carbon Isotopes in PhotosynthesisFractionation techniques may reveal new aspects of carbon dynamics in plants
TL;DR: The fractionation of carbon isotopes that occurs during photosynthesis is one of the most useful techniques for investigating the efficiency of CO2 uptake and indicates that different strategies are needed for improving wateruse efficiency in different kinds of plants.