B44A:
Extreme Weather Events and Ecosystem Function: Using Experiments and Modeling to Provide Ecological Foresight II

Submit an Abstract to this Session



Session ID#: 32007

Session Description:
Extreme weather events are increasingly becoming a concern due to their abrupt impacts on ecosystem function. Short-term extreme weather events like heat waves, droughts, ice storms, or sudden freeze events can profoundly impact terrestrial plants and ecosystem functions by pushing co-occurring plant species beyond critical response thresholds, leading to novel species assemblages and altered biogeochemical or hydrological cycling. Current land surface models perform poorly in simulating ecological impacts of extreme weather events based in part on limited understanding of mechanistic processes during and after such events. We invite presentations that highlight and advance knowledge of plant responses to extreme weather events. Observational and experimental laboratory, mesocosm or field based studies, modeling from field to Earth system scales, and integrated multidisciplinary approaches are welcome. Talks will explore the current state of knowledge, identify physiological knowledge gaps, inspire advanced experimental and modeling approaches, and stimulate discussion on future research directions.
Primary Convener:  Jeff Warren, Oak Ridge National Laboratory, Environmental Sciences Division, Oak Ridge, TN, United States
Conveners:  Anirban Guha1, Andrew Jennings Felton2 and Daniel M Ricciuto1, (1)Oak Ridge National Laboratory, Climate Change Science Institute, Oak Ridge, TN, United States(2)Montana State University, Land Resources and Environmental Sciences, Bozeman, MT, United States
Chairs:  Anirban Guha, Oak Ridge National Laboratory, Climate Change Science Institute and Environmental Sciences Division, Oak Ridge, TN, United States, Jeff Warren, Oak Ridge National Laboratory, Environmental Sciences Division, Oak Ridge, TN, United States and Andrew Jennings Felton, Montana State University, Land Resources and Environmental Sciences, Bozeman, MT, United States
OSPA Liaison:  Jeff Warren, Oak Ridge National Laboratory, Environmental Sciences Division, Oak Ridge, TN, United States

Cross-Listed:
  • A - Atmospheric Sciences
  • GC - Global Environmental Change
  • H - Hydrology
Index Terms:

0428 Carbon cycling [BIOGEOSCIENCES]
0439 Ecosystems, structure and dynamics [BIOGEOSCIENCES]
1605 Abrupt/rapid climate change [GLOBAL CHANGE]
1615 Biogeochemical cycles, processes, and modeling [GLOBAL CHANGE]

Abstracts Submitted to this Session:

Effects of extreme heat and drought on trees: what do we know and what do we need to know? (Invited) (206850)
Robert O Teskey, University of Georgia, Athens, GA, United States; University of Georgia, School of Forestry and Natural Resources, Athens, GA, United States
Thermotolerance and responses to short duration heat stress in tropical and temperate species (211958)
Danielle E. Marias Ulrich1, Frederick C Meinzer2 and Christopher J Still2, (1)Los Alamos National Laboratory, Los Alamos, NM, United States, (2)Oregon State University, Forest Ecosystems and Society, Corvallis, OR, United States
Thermotolerance and Photosystem II Behaviour in Co-occuring Temperate Tree Species Exposed to Short-term Extreme Heat Waves (293299)
Anirban Guha1, Jeffrey Warren2, Cadan Cummings3 and Jimei Han2, (1)Oak Ridge National Laboratory, Climate Change Science Institute and Environmental Sciences Division, Oak Ridge, TN, United States, (2)Oak Ridge National Laboratory, Oak Ridge, TN, United States, (3)University of Wisconsin-Madison, Wisconsin, United States
Plant hydraulic diversity buffers forest ecosystem responses to drought (Invited) (214534)
William Anderegg1, Alexandra G Konings2, Anna T Trugman3, Stephen W Pacala4, Kailiang Yu5, Benjamin N Sulman6, John Sperry7 and David R Bowling7, (1)University of Utah, Salt Lake City, United States, (2)Stanford University, Department of Earth System Science, Stanford, CA, United States, (3)University of California Santa Barbara, Department of Geography, Santa Barbara, United States, (4)Princeton University, Ecology and Evolutionary Biology, Princeton, NJ, United States, (5)ETH Zurich, Zurich, Switzerland, (6)Oak Ridge National Laboratory, Environmental Sciences Division, Oak Ridge, TN, United States, (7)University of Utah, School of Biological Sciences, Salt Lake City, UT, United States
Accounting for Landscape Heterogeneity Improves Spatial Predictions of Tree Vulnerability to Drought (287420)
Amanda M Schwantes1, Anthony Parolari2, Jennifer J Swenson3, Daniel M Johnson4, Jean-Christophe Domec5, Robert B Jackson6, Norman Frank Pelak III1 and Amilcare M Porporato7, (1)Duke University, Durham, NC, United States, (2)Marquette University, Department of Civil, Construction and Environmental Engineering, Milwaukee, United States, (3)Duke University, Nicholas School of the Environment, Durham, NC, United States, (4)University of Idaho, Forest, Rangeland, and Fire Sciences, Moscow, ID, United States, (5)Duke University, Nicholas School of the Environment, Durham, United States, (6)Stanford University, Earth System Science, Stanford, CA, United States, (7)Duke University, Civil and Environmental Engineering, Durham, NC, United States
Improving simulated long-term responses of vegetation to temperature and precipitation extremes using the ACME land model (300251)
Daniel M Ricciuto1, Jeffrey Warren1 and Anirban Guha2, (1)Oak Ridge National Laboratory, Oak Ridge, TN, United States, (2)Oak Ridge National Laboratory, Climate Change Science Institute and Environmental Sciences Division, Oak Ridge, TN, United States

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