OOS 42 - Phosphorus Cycling in Terrestrial Ecosystems: Interactions Among Plant, Microbial, and Biogeochemical Diversity

Thursday, August 10, 2017: 1:30 PM-5:00 PM
Portland Blrm 257, Oregon Convention Center
Sasha C. Reed, U.S. Geological Survey
Richard Norby, Oak Ridge National Laboratory
Sasha C. Reed, U.S. Geological Survey
Phosphorus is essential for life. While the scientific community has long recognized that the availability of phosphorus can regulate rates of fundamental ecosystem processes, an emerging area of multidisciplinary research examines the role of phosphorus in affecting terrestrial plant and microbial community composition and diversity, as well as the importance of interactions between phosphorus and the cycling of elements such as iron, oxygen, nitrogen, and carbon. This session synthesizes these new perspectives in phosphorus research, and provides novel insight and integrated approaches to a globally-relevant topic. Inspired by the 2017 Annual Meeting’s theme, the organized session described here highlights some of the most inspiring recent advances in phosphorus science and their links with biological and biogeochemical diversity. These advances are both interesting and directly related to global change factors; for instance, as encompassed by the talks, phosphorus cycling is not only affected by small-scale changes in environmental conditions, but is itself an anthropogenic driver of change. Recent research suggests that phosphorus strongly regulates both plant and microbial community composition and diversity. This control over community structure represents a previously underappreciated role of phosphorus in terrestrial ecosystems. Moreover, new research suggests that controls over phosphorus cycling may be equally diverse, with many elements interacting to regulate the availability of phosphorus. In order to bring together these perspectives, we invited a truly phenomenal list of phosphorus experts, spanning multiple scientific fields and continents. The research conducted by the speakers highlights the complexity of terrestrial phosphorus cycling, and underscores the importance of combining the scientific approaches and viewpoints used in the showcased talks. For example, research described here takes molecular, laboratory, field, and modeling approaches to elucidate the factors that control phosphorus and, in turn, the factors that phosphorus controls. Importantly, phosphorus has been regularly cited in recent research as playing a key role in determining how ecosystems respond to a host of global changes. Thus, our limited understanding of terrestrial phosphorus cycling not only hinders our current perspectives on how ecosystems function, but also our capacity to consider and predict how ecosystems will respond to change. In sum, this session represents an exciting joining of phosphorus cycling perspectives that span multiple scales, relate to current issues of change, and have origins in biological and biogeochemical diversity. We believe the session offers an unparalleled opportunity to synthesize recent advances in phosphorus cycling and would be of great interest to the ESA community.
1:30 PM
 How do diverse ecosystems overcome low soil phosphorus? Mechanisms, implications, and meditations
Cory C. Cleveland, University of Montana; Megan K. Nasto, University of Montana; Benjamin L. Turner, Smithsonian Tropical Research Institute; Noah Fierer, University of Colorado Boulder; Alanna N. Shaw, University of Montana
2:10 PM
 Phosphorus limitation of tree species but not communities in tropical forests
Benjamin L. Turner, Smithsonian Tropical Research Institute; Tania Brenes-Arguedas, Smithsonian Tropical Research Institute; Richard Condit, Smithsonian Tropical Research Institute
2:30 PM
 Redox dynamics drive patterns in phosphorus pools across a wet tropical forest landscape
Whendee L. Silver, University of California, Berkeley; Avner Gross, University of California, Berkeley; Christine S. O'Connell, University of California, Berkeley; Yang Lin, University of California; Jennifer Pett-Ridge, Lawrence Livermore National Laboratory
2:50 PM
 Linking root traits, microbial communities, and phosphorus availability in tropical trees
Kristine Grace Cabugao, Oak Ridge National Laboratory; Collin M. Timm, Johns Hopkins University; Alyssa Carrell, Oak Ridge National Laboratory; Joanne Childs, Oak Ridge National Laboratory; Daniela Yaffar, Oak Ridge National Laboratory; David J. Weston, Oak Ridge National Laboratory; Richard J. Norby, Oak Ridge National Laboratory
3:10 PM
3:20 PM
 Seasonal dynamics of available soil phosphorus in tropical forested ecosystems
Tana E. Wood, USDA Forest Service; Megan E. McGroddy, University of Virginia; Elise Pendall, University of Western Sydney; Jennifer S. Powers, University of Minnesota; Sasha C. Reed, U.S. Geological Survey
3:40 PM
 Coupled nutrient cycling determines tropical forest trajectory under elevated CO2
Nicholas J. Bouskill, Lawrence Berkeley National Laboratory; Qing Zhu, Lawrence Berkeley National Laboratory; William J. Riley, Lawrence Berkeley National Laboratory
4:00 PM
 Less below-ground symbionts in European grasslands under nutrient pollution
Tobias Ceulemans, University of Leuven; Maarten Van Geel, University of Leuven; Hans Jacquemyn, University of Leuven; Jan Plue, Stockholm University; Krista Takkis, University of Tartu; Liina Saar, University of Tartu; Liis Kasari, University of Tartu; Gerrit Peeters, University of Leuven; Kasper van Acker, University of Leuven; Olivier Honnay, University of Leuven
4:20 PM
 Availability versus bioavailability of phosphorus in the rhizosphere
Philippe Hinsinger, INRA; Elodie Betencourt, INRA; Ran Erel, INRA; Esther Guillot, INRA; Christophe Jourdan, CIRAD; Jean-Paul Laclau, CIRAD; Céline Pradier, CIRAD; Xiaoyan Tang, INRA
4:40 PM
 The phosphorus-ecosystem services cascade
Graham K. MacDonald, McGill University; Helen P. Jarvie, Centre for Ecology and Hydrology; Paul J.A. Withers, Bangor University; Donnacha G. Doody, Agri-Food and Biosciences Institute; Bonnie L. Keeler, Institute on the Environment; Michael N. Weintraub, University of Toledo