[Enviro-lunch] Today! (4/19): Kimber Moreland

[Nate Bogie]

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Hello Everyone,

Please join us for a talk *Today! 4/19* by , 12-1pm in Room SE2-302.



*Deep Soil Carbon in the Critical Zone: climatic controls on the amount and
turnover of carbon in weathered bedrock*



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*Abstract:*

Up to 60-80% of the Carbon (C) stored in soils is found below 30cm and deep
CO2 efflux changes seasonally showing the direct connection between
atmospheric conditions and deep soil C dynamics. Despite this link there is
very little data on C storage and stability in weathered bedrock or
saprolite. The overall objective of this research is to investigate how
climate regulates organic matter (OM) storage, composition, stability, and
stabilization mechanisms. Expecting that the amount of OM stored in deep
soil and the stability are a function of soil thickness and availability of
weathering products (i.e. reactive minerals), the stock and stability of
deep SOM is expected to follow a similar relationship with climate, as does
the intensity of weathering. This research is conducted in the NSF funded
Southern Sierra Critical Zone Observatories that is located along a
climosequence, the western slopes of the Sierra Nevada Mountains of
California. Here we will present results derived from characterization of
soils and weathered bedrock using elemental and stable isotope elemental
analysis, Fourier Transformed Infrared Spectroscopy as a proxy for
decomposition of bulk OM, and Accelerator Mass Spectroscopy to determine
the turnover time of C from the topsoil down to 10 meters deep. Our
findings show that adding in subsoil and weathered bedrock C stocks
increases estimates of soil C stock by 23-29%, that weathered bedrock is an
active cycling pool of C, and that the turnover time generally increases
with depth and responds to climate regime.



*Bio:*

Kimber Moreland is interested in how climate impacts the biogeochemical
cycling of deep soil organic carbon. She completed her undergraduate at
Regis University in Denver, Colorado completing two self driven projects on
flooding effects on mangroves and estrogenic effects on coral polyps. She
is currently in her fourth year of her phD program at UC Merced under the
guidance of Asmeret Asefaw Berhe. Kimber is part of the Southern Sierra
Critical Zone Observatory and has also recently joined the team at Lawrence
Livermore National Labs. Outside of research she has co-founded the group
BiotaQ, a K-12 STEAM outreach program here at UC Merced. She is passionate
about helping her local community through the science work she does her at
UCM.





When: Apr., 19 Thursday, 12pm – 1pm



Where: SE2-302



Coffee and treats will be provided, please bring your own mugs.



We look forward to seeing you,



Nate & Jing



Organizers for Spring 2018: Nate Bogie and Jing Yan

Faculty coordinator: Asmeret Asefaw Berhe



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