A GLOBAL SYNTHESIS OF ORGANIC MATTER DATA

Organic matter (OM) underpins ecosystem biogeochemistry across the globe. While research has focused on OM characterization within singular ecosystems, less attention has been given to cross-ecosystem patterns. Understanding the OM patterns across ecosystems may reveal broader constraints on OM contributions to broad scale biogeochemistry. We leveraged CoreMS and custom metadata management to aggregate >5000 FTICR-MS samples collected by a variety of labs from diverse locations and ecosystems across the globe. Our analyses indicate that ecosystems represent coherent groups despite the significant spatial distances, variation in collection methodologies, and differences in instruments. We observed significant multivariate differences across ecosystems that aligned with expectations (e.g., river OM diverged from sediment OM) but some patterns were unexpected (e.g., river OM was not divergent from soil OM). To investigate differences in OM chemistry, we used a principal component analysis (PCA) to evaluate OM properties enriched in each ecosystem. The PCA captured many significant multivariate differences and revealed potential OM properties associated with ecosystem types. For example, lakes and streams were associated with increased N:C and S:C ratios indicating potential nutrient loading while sediment and ice was affiliated with H:C and P:C ratios highlighting degradation. By integrating more ecosystems, we expect that this synthesized dataset will serve as an important resource to the scientific community to contextualize local information to global patterns.

Presentation Preference: Standard Oral (12 Minutes)

Primary Presenter: Robert Danczak, Pacific Northwest National Laboratory (robert.danczak@pnnl.gov)

Authors:

Robert Danczak, Pacific Northwest National Laboratory  (robert.danczak@pnnl.gov)

Hu Ang, Hunan Agricultural University  (anghu@hunau.edu.cn)

Juliana D'Andrilli, University of North Texas  (Juliana.D'andrilli@unt.edu)

Thorsten Dittmar, University of Oldenburg  (thorsten.dittmar@uol.de)

Jeremy Fonvielle, University of Cambridge  (jaf91@cam.ac.uk)

Erika Freeman, Swiss Federal Institute of Aquatic Science and Technology  (erika.freem@gmail.com)

Vanessa Garayburu-Caruso, Pacific Northwest National Laboratory  (vanessa.garayburu-caruso@pnnl.gov)

Jeffrey Hawkes, Uppsala University  (jeffrey.hawkes@kemi.uu.se)

Ding He, The Hong Kong University of Science and Technology  (dinghe@ust.hk)

Amy Holt, The University of Alaska Southeast  (adholt2@alaska.edu)

Norbert Kamjunke, Helmholtz Centre for Environmental Research  (norbert.kamjunke@ufz.de)

Anne Kellerman, Florida State University  (akellerman@fsu.edu)

Dolly Kothawala, Uppsala University  (dolly.kothawala@ebc.uu.se)

Oliver Lechtenfeld, Helmholtz Centre for Environmental Research  (oliver.lechtenfeld@ufz.de)

Krista Longnecker, klongnecker@whoi.edu  (klongnecker@whoi.edu)

Helena Osterholz, Leibniz-Institute for Baltic Sea Research  (helena.osterholz@io-warnemuende.de)

Carsten Simon, Helmholtz-Centre for Environmental Research  (carsten.simon@ufz.de)

Robert Spencer, Florida State University  (rgspencer@fsu.edu)

Jianjun Wang, Nanjing Institute of Geography and Limnology  (jjwang@niglas.ac.cn)

Andrew Wozniak, University of Delaware  (awozniak@udel.edu)

Yongqiang Zhou, Nanjing Institute of Geography and Limnology  (yqzhou@niglas.ac.cn)

James Stegen, Pacific Northwest National Laboratory  (James.Stegen@pnnl.gov)

Andrew Tanentzap, Trent University  (atanentzap@trentu.ca)