[Enviro-lunch] Today 2/7: Nicholas Dove

[Jing Yan]

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Hello Everyone,

Please join us Today Feb. 7 for this week's Enviro-Lunch talk by Nicholas Dove, at 12-1pm in room SE2-224.



Understanding the long-term temperature response

of soil respiration with microbial ecology



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While soils store [~1500 Pg] of carbon (C), it is currently unclear how climate change will affect this large C pool. The effect of temperature on enzyme kinetics predicts that as temperatures warm, microbial activity and cellular respiration will increase, releasing C from soils into the atmosphere. However, the long-term effect of warming on soil likely impacts a myriad of factors affecting the persistence of soil C. Recent evidence from a 20-y warming experiment suggests that soil respiration responds non-monotonically to warming over time; although, the mechanistic factors for this have yet to be elucidated. We used a 4.5 y whole-profile soil warming experiment coupled with laboratory incubations amended with different resources to show that soil microbial communities in warmed soils have altered nutrient demands, which profoundly impacts their community composition and metabolism. These differences could account for previously unexplained patterns, and these insights could help constrain predictions for soil C persistence in a warmed world.



Bio: I am broadly interested in the effects of global change (particularly changes in climate and fire regimes) on soil microbial communities and the biogeochemical processes that they control. I pair traditional biogeochemical assays with next-generation high-throughput sequencing of microbial DNA and metagenomics to understand linkages between microbial community structure and function. I am in Stephen Hart's Ecosystem Ecology Lab and an affiliate of Lawrence Berkeley National Lab (formerly a Dept. of Energy Graduate Student Research Fellow), and much of my research takes place in the Southern Sierra Critical Zone Observatory.



When: Thursday 2/7, 12pm - 1pm



Where: SE2-224



Coffee will be provided, please bring your own mugs.



We look forward to seeing you,



Jing & Jennifer



Organizers for Spring 2019: Jing Yan and Jennifer Alvarez

Faculty coordinator: Asmeret Asefaw Berhe





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