B32A:
Biomarkers from Source to Sink: Bridging the Transition from Empirical Relationships to Mechanistic Theory II

Submit an Abstract to this Session



Session ID#: 32062

Session Description:
Biomarkers can provide information on numerous processes including cellular metabolism, ecohydrology, sediment transport, diagenesis, atmospheric or water chemistry, and paleoclimate. Interpretations of organic matter molecular and isotopic signals from plant waxes, algal markers, alkenones, GDGTs, or other compounds are grounded in empirical correlations. Progress towards mechanistic understandings of how environmental factors influence biosynthesis, and how biomarker signals are modified through transport and deposition, can increase the value of these data and open opportunities for expanded applications. This session solicits contributions investigating these questions from source to sink, including biosynthesis, transport, and post-depositional alteration or production at all timescales and in any depositional environment. We also seek studies that use or test process-based interpretations of biomarker data to infer environmental, ecologic, or climatic conditions in the past or present such as temperature, hydroclimate, CO2 levels, atmosphere or ocean circulation, or salinity.
Primary Convener:  Daniel B Nelson, University of Basel, Department of Environmental Sciences - Botany, Basel, Switzerland
Conveners:  Isla S. Castañeda, University of Massachusetts Amherst, Department of Earth, Geographic, and Climate Sciences, Amherst, MA, United States, William J D'Andrea, Columbia University of New York, Palisades, NY, United States and Aaron F Diefendorf, University of Cincinnati, Cincinnati, United States
Chairs:  Daniel B Nelson, University of Basel, Department of Environmental Sciences - Botany, Basel, Switzerland, Isla S. Castañeda, University of Massachusetts Amherst, Department of Earth, Geographic, and Climate Sciences, Amherst, MA, United States and Aaron F Diefendorf, University of Cincinnati Main Campus, Department of Geosciences, Cincinnati, United States
OSPA Liaison:  Daniel B Nelson, University of Basel, Department of Environmental Sciences - Botany, Basel, Switzerland

Cross-Listed:
  • PP - Paleoceanography and Paleoclimatology
Index Terms:

0424 Biosignatures and proxies [BIOGEOSCIENCES]
0473 Paleoclimatology and paleoceanography [BIOGEOSCIENCES]
1055 Organic and biogenic geochemistry [GEOCHEMISTRY]
4912 Biogeochemical cycles, processes, and modeling [PALEOCEANOGRAPHY]

Abstracts Submitted to this Session:

Experimental Assessment of Carbon Isotopes of Light Hydrocarbons under Different Redox Conditions (293057)
Qi Fu and Xueze Chen, University of Houston, Department of Earth and Atmospheric Sciences, Houston, TX, United States
The power of pigments, calibrating chemoclines with chlorophylls and carotenoids. (297064)
Christopher K Junium, Syracuse University, Earth Sciences, Syracuse, NY, United States and Benjamin Thornton Uveges, Syracuse University, Earth Sciences, Syracuse, United States
Synthesis of eukaryotic lipid biomarkers in the bacterial domain (Invited) (243093)
Paula V Welander, Amy B Banta, Alysha K Lee and Jeremy H. Wei, Stanford University, Earth System Science, Stanford, CA, United States
Late Holocene dinosterol hydrogen isotope variability in Lac Lalolalo and Lac Lanutavake on Wallis Island (296609)
Ashley E Maloney1, Samantha N Hing2, Julie N Richey3, Daniel B Nelson4 and Julian P Sachs1, (1)University of Washington, School of Oceanography, Seattle, WA, United States, (2)Lawrence Berkeley National Laboratory, Berkeley, CA, United States, (3)USGS, St. Petersburg, United States, (4)EAWAG Swiss Federal Institute of Aquatic Science and Technology, Duebendorf, Switzerland
What Drives Hydrogen Isotopic Variability Recorded by Biomarkers in Sediments of Lake Karakul, Pamir? (216941)
Bernhard Aichner1, Steffen Mischke2, Francesco S.R. Pausata3, Martin Werner4, Qiong Zhang5, Liv Heinecke6, Sarah J Feakins7, Dirk Sachse8, Zafar Mahmoudov9 and Ilhomjon Rajabov9, (1)University of Potsdam, Institute of Earth and Environmental Science, Potsdam, Germany, (2)Institute of Earth Sciences, University of Iceland, Reykjavik, Iceland, (3)University of Quebec in Montreal, Department of Earth and Atmospheric Sciences, Montreal, Canada, (4)Alfred Wegener Institute Helmholtz-Center for Polar and Marine Research Bremerhaven, Bremerhaven, Germany, (5)Stockholm University, Stockholm, Sweden, (6)Alfred Wegener Institute Helmholtz-Center for Polar and Marine Research Potsdam, Potsdam, Germany, (7)University of Southern California, Department of Earth Sciences, Los Angeles, CA, United States, (8)GFZ German Research Centre for Geosciences, Potsdam, Germany, (9)Agency on Hydrometeorology of the State Committee on Environmental Protection and Forestry, Dushanbe, Tajikistan
The Spatial and Temporal Distribution of SST in the Yellow Sea and the Evolution of the Yellow Sea Warm Current During the Holocene (248606)
Yonghao Jia, Xiaotong Xiao, Meng Yu, Zi-neng Yuan, Hailong Zhang and Meixun Zhao, Ocean University of China, Qingdao, China

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