Dear Colleagues, We would like to draw your attention to the *Organic Geochemistry* theme at the upcoming Goldschmidt Conference, and specifically to session *25g: Plant Compounds and their Isotope Ratios as Ecohydrological Tracers*.
Abstract submissions are open now and will be accepted until *February 8, 2014*. Submission information can be found here: http://goldschmidt.info/2014/abstractsInfo. Session 25g summary: Hydrogen and oxygen isotope ratio of terrestrial higher plant compounds, such as cellulose and lipids, record hydrologic and ecologic information. These compounds act as tracers of the environmental and biological processes that shape their isotope ratios and can be used to reconstruct plant-water conditions, environmental changes, and climatic conditions in both modern and ancient settings. Understanding the influence of environment and plant physiology on the isotopic signatures of plant compounds is essential to their use as ecohydrologic tracers. Similarly, understanding the factors that influence the signals preserved in sedimentary plant compounds (e.g. season of production, mixed plant sources, and changing plant communities through time) is critical to accurate paleoclimatic interpretations. For this session, we encourage contributions that present novel field and controlled studies of modern plant compounds that seek to establish and clarify the ecohydrologic information recorded in these materials as well as paleohydrologic studies of ancient compounds that consider the factors that have shaped these records. In particular, we welcome studies that utilize compound-specific stable isotope methods, controlled growth chambers, isotopic labeling experiments, diverse sedimentary archives and inter-calibration of paleohydrologic proxies. Best, Ansgar Kahmen, ETH Zurich Francesca McInerney, University of Adelaide Brett Tipple, University of Utah Brett J. Tipple Research Assistant Professor Department of Biology Global Change and Sustainability Center University of Utah
