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Science

Title:		Ecosystem fluxes during drought and recovery in an experimental forest
Author(s):		Werner C; Meredith LK; Ladd SN; Ingrisch J; Kubert A; van Haren J; Bahn M; Bailey K; Bamberger I; Beyer M; Blomdahl D; Byron J; Daber E; Deleeuw J; Dippold MA; Fudyma J; Gil-Loaiza J; Honeker LK; Hu J; Huang J; Klupfel T; Krechmer J; Kreuzwieser J; Kuhnhammer K; Lehmann MM; Meeran K; Misztal PK; Ng WR; Pfannerstill E; Pugliese G; Purser G; Roscioli J; Shi L; Tfaily M; Williams J;
Address:		"Ecosystem Physiology, Faculty of Environment and Natural Resources, Albert-Ludwig-University of Freiburg, Freiburg, Germany. School of Natural Resources and the Environment, University of Arizona, Tucson, AZ, USA. Biosphere 2, University of Arizona, Oracle, AZ, USA. BIO5 Institute, The University of Arizona, Tucson, AZ, USA. Department of Ecology, University of Innsbruck, Innsbruck, Austria. Honors College, University of Arizona, Tucson, AZ, USA. Institute of Geoecology - Environmental Geochemistry, Technical University Braunschweig, Braunschweig, Germany. Department of Civil, Architectural and Environmental Engineering, University of Texas at Austin, Austin, TX, USA. Department of Atmospheric Chemistry, Max Planck Institute for Chemistry, Mainz, Germany. Biogeochemistry of Agroecosystems, University of Gottingen, Gottingen, Germany. Geo-Biosphere Interactions, University of Tuebingen, Tuebingen, Germany. Department of Environmental Science, University of Arizona, Tucson, AZ, USA. Max Planck Institute for Biogeochemistry, Jena, Germany. Aerodyne Research, Billerica, MA, USA. Forest Dynamics, Swiss Federal Institute for Forest, Snow and Landscape Research (WSL), Birmensdorf, Switzerland. Centre for Ecology and Hydrology, University of Edinburgh, Edinburgh, UK. Pacific Northwest National Laboratory, Richland, WA, USA. Energy, Environment and Water Research Center, The Cyprus Institute, Nicosia, Cyprus"
Journal Title:		Science
Year:		2021
Volume:		20211216
Issue:		6574
Page Number:		1514 - 1518
DOI:		10.1126/science.abj6789
ISSN/ISBN:		1095-9203 (Electronic) 0036-8075 (Linking)
Abstract:		"Severe droughts endanger ecosystem functioning worldwide. We investigated how drought affects carbon and water fluxes as well as soil-plant-atmosphere interactions by tracing (13)CO(2) and deep water (2)H(2)O label pulses and volatile organic compounds (VOCs) in an enclosed experimental rainforest. Ecosystem dynamics were driven by different plant functional group responses to drought. Drought-sensitive canopy trees dominated total fluxes but also exhibited the strongest response to topsoil drying. Although all canopy-forming trees had access to deep water, these reserves were spared until late in the drought. Belowground carbon transport was slowed, yet allocation of fresh carbon to VOCs remained high. Atmospheric VOC composition reflected increasing stress responses and dynamic soil-plant-atmosphere interactions, potentially affecting atmospheric chemistry and climate feedbacks. These interactions and distinct functional group strategies thus modulate drought impacts and ecosystem susceptibility to climate change"
Keywords:
Notes:		"PubMed-not-MEDLINEWerner, Christiane Meredith, Laura K Ladd, S Nemiah Ingrisch, Johannes Kubert, Angelika van Haren, Joost Bahn, Michael Bailey, Kinzie Bamberger, Ines Beyer, Matthias Blomdahl, Daniel Byron, Joseph Daber, Erik Deleeuw, Jason Dippold, Michaela A Fudyma, Jane Gil-Loaiza, Juliana Honeker, Linnea K Hu, Jia Huang, Jianbei Klupfel, Thomas Krechmer, Jordan Kreuzwieser, Jurgen Kuhnhammer, Kathrin Lehmann, Marco M Meeran, Kathiravan Misztal, Pawel K Ng, Wei-Ren Pfannerstill, Eva Pugliese, Giovanni Purser, Gemma Roscioli, Joseph Shi, Lingling Tfaily, Malak Williams, Jonathan eng Research Support, Non-U.S. Gov't 2021/12/17 Science. 2021 Dec 17; 374(6574):1514-1518. doi: 10.1126/science.abj6789. Epub 2021 Dec 16"