OOS 29
Peatland Processes and Environmental Change: Past, Present, and Future

Thursday, August 8, 2013: 1:30 PM-5:00 PM
101D, Minneapolis Convention Center
Organizer:
J. Megan Steinweg
Co-organizer:
Jason K. Keller
Moderator:
J. Megan Steinweg
Peatland ecosystems occupy a small percentage of the terrestrial land surface, but contain over 20% of the terrestrial soil carbon and are responsible a significant portion of the global flux of methane (CH4) to the atmosphere. These wetlands play a disproportionately large role in the modern global carbon cycle, and peatland carbon cycling has been an important component of global climate forcing over geological time. Thus, it is crucial to understand the mechanistic controls of peatland carbon cycling to predict and model how these ecosystems will respond to and impact ongoing global change This session will appeal to a broad range of ecologists. The northern location of ESA this year will likely draw peatland ecologists to the meeting. The topics explored in this session will be of interest to climate change researchers, wetland ecologists, as well as ecosystem ecologist and biogeochemists interested in carbon and nutrient cycling in anaerobic and high carbon systems. Recent investment by the US DOE in a large-scale, multi-factor peatland climate change experiment on the Chippewan National Forest of northern Minnesota, USA will also likely increase interest in this session. We have selected and invited speakers with a broad range of experience in peatland and ecosystem research studies, from established to early career faculty to post-doctoral researchers. We start the session with speakers addressing the history and research in peatlands, and end the session with a modeling presentation and a speaker to highlight a new large-scale peatland ecosystem manipulation. All other speakers have extensive experience in topics related to plant and microbial processes in peatland ecosystems. The order of the talks will incorporate microbial and plant experiments to landscape and modeling perspectives. The modeling perspective was placed after the presentations containing empirical data to try and highlight how current information is useful for peatland models and indicate what other type of data are necessary.
1:30 PM
 Marcell Experimental Forest, USDA Forest Service peatland research past and present
Randall K. Kolka, USDA Forest Service, Northern Research Station; Paul J. Hanson, Oak Ridge National Laboratory; Stephen D. Sebestyen, USDA Forest Service Research
1:50 PM
 Assessing the quality and the decomposition status of solid phase peat and its porewater dissolved organic matter (DOM) using complementary analytical techniques
Malak M. Tfaily, Florida State University; Xueju Lin, Georgia Inst. of Technology; Joel E. Kostka, Georgia Institute of Technology; William T. Cooper, Florida State University; Jeffery P. Chanton, Florida State University
2:10 PM
 Tropical Peatlands in the Amazon basin: An underestimated CH4 emission source and their unexplored microbial structure
Hinsby Cadillo-Quiroz, Arizona State University; Michal Ziv-El, Arizona State University; Joost van Haren, University of Arizona; Eoin Brodie, Lawrence Berkeley National Laboratory
2:30 PM
 Soil microbial community determines vulnerability of soil carbon exposed to warming in northern permafrost
Kai Xue, University of Oklahoma; Mengting Yuan, University of Oklahoma; Lei Cheng, Institute of Environmental Genomics; Jason Shi, University of Oklahoma; Ye Deng, University of Oklahoma; Liyou Wu, University of Oklahoma; Zhili He, University of Oklahoma; Joy D. Van Nostrand, University of Oklahoma; Edward A. G. Schuur, University of Florida; Yiqi Luo, University of Oklahoma; Konstantinos Konstantinidis, Georgia Institute of Technology; James Tiedje, Michigan State University; Jizhong Zhou, University of Oklahoma
2:50 PM
 Methane flux from peatland ecosystems in response to environmental change: Insights from the past and opportunities for the future
Jason K. Keller, Chapman University; Scott D. Bridgham, University of Oregon; Hinsby Cadillo-Quiroz, Arizona State University; Qianlai Zhuang, Purdue University
3:10 PM
3:20 PM
 Biogeochemical and vegetation controls on carbon storage and GHG losses in southeastern pocosin peatlands: Do drought and drainage really matter?
Curtis Richardson, Duke University; Hongjun Wang, Duke University; Neal Flanagan, Duke University; Mengchi Ho, Duke University
3:40 PM
 Spatial and temporal variation in peat pore water chemistry of a northern peatland: Reference conditions of a large-scale climate change experiment (SPRUCE)
Natalie A. Griffiths, Oak Ridge National Laboratory; Stephen D. Sebestyen, USDA Forest Service Research
4:00 PM
 Nitrogen deposition leads to a weaker carbon sink in a nutrient-limited bog
Tuula Larmola, Mount Holyoke College; Jill L. Bubier, Mount Holyoke College; Christine A. Kobyljanec, Mount Holyoke College; Nathan Basiliko, University of Toronto at Mississauga; Sari Juutinen, University of Helsinki; Elyn Humphreys, Carleton University; Michael Preston, University of Toronto at Mississauga; Tim R. Moore, McGill University
4:40 PM
 Whole-ecosystem warming and CO2 manipulation to assess ombrotrophic bog responses to hypothetical future environments
Paul J. Hanson, Oak Ridge National Laboratory; Charlotte Barbier, Oak Ridge National Laboratory; Jeff S. Riggs, Oak Ridge National Laboratory; Randall K. Kolka, USDA Forest Service; Steven E. Sebestyen, USDA Forest Service; Natalie A. Griffiths, Oak Ridge National Laboratory; Les A. Hook, Oak Ridge National Laboratory; Colleen M. Iversen, Oak Ridge National Laboratory; Jeffrey M. Warren, Oak Ridge National Laboratory; David J. Weston, Oak Ridge National Laboratory; Richard J. Norby, Oak Ridge National Laboratory