New insights into large-scale trends of apparent organic matter reactivity in marine sediments and patterns of benthic carbon transformation
Felipe S. Freitas,Philip A. Pika,Sabine Kasten,Bo B. Jørgensen,Jens Rassmann,Christophe Rabouille,Shaun Thomas,Henrik Sass,Richard D. Pancost,and Sandra Arndt
BRIDGE, School of Geographical Sciences, University of Bristol,
Bristol, BS8 1RL, United Kingdom
Biogeochemistry and Earth System Modeling, Geosciences, Environment
and Society Department, Université Libre de Bruxelles, Brussels,
CP160/03 1050, Belgium
current address: Department of Earth Sciences, VU University of
Amsterdam, 1081 HV Amsterdam, the Netherlands
Sabine Kasten
Alfred Wegener Institute Helmholtz Centre for Polar and Marine
Research, 27570 Bremerhaven, Germany
Faculty of Geosciences, University of Bremen, 28359 Bremen, Germany
MARUM – Center for Marine Environmental Sciences, University of
Bremen, 28359 Bremen, Germany
Bo B. Jørgensen
Section for Microbiology, Department of Biology, Aarhus University,
8000 Aarhus C, Denmark
School of Earth and Ocean Sciences, Cardiff University, Cardiff, CF10
3AT, United Kingdom
Richard D. Pancost
Organic Geochemistry Unit, School of Earth Sciences & School of
Chemistry, University of Bristol, Bristol, BS8 1TS, United Kingdom
Cabot Institute for the Environment, University of Bristol, Bristol,
BS8 1UH, United Kingdom
Sandra Arndt
Biogeochemistry and Earth System Modeling, Geosciences, Environment
and Society Department, Université Libre de Bruxelles, Brussels,
CP160/03 1050, Belgium
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It remains challenging to fully understand what controls carbon burial in marine sediments globally. Thus, we use a model–data approach to identify patterns of organic matter reactivity at the seafloor across distinct environmental conditions. Our findings support the notion that organic matter reactivity is a dynamic ecosystem property and strongly influences biogeochemical cycling and exchange. Our results are essential to improve predictions of future changes in carbon cycling and climate.
It remains challenging to fully understand what controls carbon burial in marine sediments...
