Dear colleagues,
We invite abstracts to our session "Partitioning mechanisms governing ecosystem biogeochemical cycling: Physiology vs. physics" at the AGU 2016 Fall meeting that explore biotic-abiotic interactions and how they influence biogeochemical cycling. The deadline for abstract submission is Wednesday, 3 August 2016. Abstracts can be submitted at https://agu.confex.com/agu/fm16/preliminaryview.cgi/Session13337.html. For additional details please see abstract below. Peter M. Homyak1, Eric Slessarev2, and Yang Lin3 1University of California, Irvine. 2University of California, Santa Barbara. 3University of California, Berkeley Session ID: 13337 Partitioning mechanisms that govern ecosystem biogeochemical cycling: Physiology vs. physics Across scales, shifts in the balance between physiological and physical processes govern biogeochemical cycling. For instance, in arid ecosystems, abiotic N transformations and photodegradation can govern N and C cycling during dry periods when biological processes become stressed. In humid landscapes, abiotic reactions among redox-active species can sustain organic matter decomposition when biological processes are oxygen-limited, and bio-cycling of calcium may counteract the physical effects of leaching on soil pH. Because biotic-abiotic processes often act in opposing ways, they may combine to produce non-linear responses. Thus, understanding tradeoffs between biotic-abiotic processes is critical to predicting the direction and shape of ecosystem response to environmental forcing. We welcome contributions from all disciplines relating to the following questions: i) How do we partition biotic-abiotic mechanisms controlling biogeochemical cycling? ii) What controls the balance and interaction between biotic-abiotic processes? And iii) How might a changing climate shift this balance? ----------------------------------------------- Peter M. Homyak, Ph.D. Associate Researcher Earth System Science Ecology and Evolutionary Biology University of California, Irvine Irvine, CA 92697 phom...@uci.edu (805) 765-1025 | 3027 Bio Sci III http://petehomyak.weebly.com <http://petehomyak.weebly.com/>
