Session: Drought Effects on Soil Biogeochemical Cycling Oral I (includes student competition)
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Division: SSSA Division: Forest, Range and Wildland Soils

Title: Drought Effects on Soil Biogeochemical Cycling Oral I (includes student competition)

Organizers: Peter M. Homyak , Joshua P. Schimel and Eric Slessarev
Moderators: Peter M. Homyak , Joshua P. Schimel and Eric Slessarev
Lead Community Sponsor:
Cosponsor: SSSA Division: Soil Biology and Biochemistry
Community Cosponsor:
Format: Oral Topical Session
Keywords: drought stress, Birch effect, C stabilization, and drying–rewetting

Session Description: Droughts can affect both physiological and physical processes that control soil biogeochemical cycling. For instance, abiotic transformations can govern C and N cycling during dry periods when microbes are moisture stressed. Drought can also alter the physical structure and chemical nature of soil by controlling the extent of water-filled pores and solution ionic strength, which in turn influence the stability of C and N. Because longer and more frequent droughts are expected with climate change, we welcome contributions from landscape to microbial scales evaluating how drought affects soil processes and biogeochemical cycling.