[Enviro-lunch] Enviro-Lunch TODAY 12-1:15PM PST for Dr. Abney's Seminar: "Dissolved Pyrogenic Carbon: Constraints and Drivers in the Soil System"

[Justin Yeakel]

Dr. Rebecca Abney

*Dissolved Pyrogenic Carbon: Constraints and Drivers in the Soil System*

*December 5th, **2022  *

* 12:00-1:15PM PST*

*via *
*https://ucmerced.zoom.us/j/85854124987*
<https://ucmerced.zoom.us/j/85854124987>

*and*

*SSB 170 (UC Merced)*

*Abstract:* Wildfire severity has been increasing in the past several
decades, particularly in the Western US, and in the Southeastern US, there
has been an exponential increase in the use of prescribed fire. One of the
main by-products of fire is the formation of pyrogenic carbon (PyC),
which is a significant component of the global soil carbon pool. It has
received considerable research attention due to its longer persistence in
soil than other soil organic matter components. However, it is susceptible
to rapid loss via processes such as decomposition and leaching, and it has
been found in rivers, lakes, and oceans worldwide. I will present results
from both a meta-analysis and field studies that demonstrate the
variability in quality and stocks of PyC across watersheds and time. These
data suggest some dominant controls on the fate of aqueous fluxes of PyC,
including burn severity, decomposition, and precipitation. However,
improved quantitative understanding of environmental controls on soil
organic matter and PyC fluxes is needed to scale these results up to
larger-scale global carbon models.

[image: Screen Shot 2022-12-05 at 9.27.18 AM.png]

*Bio:* Dr. Rebecca Abney is currently an Assistant Professor in Forest and
Disturbed Soils in the Warnell School of Forestry at the University of
Georgia. She completed her undergraduate degree from the University of St
Andrews, in Scotland in 2012, where she studied environmental biology and
physical geography. She followed that with a PhD from the University of
California, Merced on the interactive roles of fire and erosion on the fate
of carbon in soil. She did a post-doctoral fellowship at Indiana University
on the role of soil chemistry in mediating reactive nitrogen fluxes. Her
current work is focused on mechanisms that drive stability and loss of soil
organic matter from soil, particularly in soils impacted by fire (wild and
prescribed fire), urbanization, and land use change.


--
Justin D. Yeakel
Associate Professor | UC Merced
http://jdyeakel.github.io
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