[Enviro-lunch] Enviro-Lunch seminar this Thursday (9/24, 12-1pm): soil carbon sequestration potential in CA

[Kyungjin Min]

[image: image.png]

Hello all,

This week Allegra Mayer, a PhD student at UC Berkeley (advisor: Dr. Whendee
Silver) shares her research on compost amendments into CA soils. Please
join us on Sep 24th between 12-1 pm.

Join Zoom Meeting Enviro-lunch

https://ucmerced.zoom.us/j/175736103

Meeting ID: 175 736 103

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+16699006833,,175736103# US (San Jose)

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*Title:*

Soil C sequestration potential in CA grasslands with compost amendments



*Abstract: *

Composted organic matter amendments have been shown to increase net carbon
(C) sequestration in rangeland soils and have been proposed as a means to
help lower atmospheric CO2 concentrations. However, the effect of climate
change on soil organic C (SOC) stocks and greenhouse gas emissions in
rangelands is not well understood, and the viability of climate change
mitigation strategies under future conditions is even less certain. We used
a process-based biogeochemical model (DayCent) to simulate net primary
productivity (NPP), SOC, and greenhouse gas fluxes across California annual
grasslands with and without compost amendments. We drove the DayCent
simulations with field data and with site-specific daily climate data from
two Earth system models (CanESM2 and HadGEM-ES) and two representative
concentration pathways (RCP4.5 and RCP8.5). Both NPP and SOC stocks were
resilient to projected climate changes. In this talk I will present results
from this study, which suggest that the amendment of compost to rangelands
in California is resilient to future climate change and could contribute to
climate mitigation goals alongside emissions reductions.




*Bio: *


[image: Allegra Lab headshot from Ellyn__compressed (2).jpg]


I am a finishing PhD Candidate in the Department of Environmental Science,
Policy & Management at UC Berkeley, advised by Professor Whendee Silver. I
am also a Graduate Research Scholar at Lawrence Livermore National Lab,
working with Dr. Karis McFarlane at the Center for Accelerator Mass
Spectrometry.  I am generally interested in the balance of biogeochemical
fluxes of carbon at the soil-atmosphere interface. My research has examined
mechanisms and overall potential for carbon sequestration in soil at all
scales, from global to molecular scale, with the motivation of
understanding how managing landscapes can contribute to negative emissions
and climate change mitigation. My interest in soil carbon cycling stemmed
from my undergraduate research in geochemistry at Northwestern, which led
to a research fellowship on soil carbon persistence at the Max Planck
Institute for Biogeochemistry in Germany.  I hope to continue working on
solutions-focused science throughout my career.



KJ, Manisha, and Anna



Organizers for Fall 2020: KJ Min, Manisha Dolui, Anna Jurusik

Faculty coordinator: Asmeret Asefaw Berhe



------

You can find the semester schedule below.



*date*

*speaker*

*topic*

  9/10

Shane Franklin

@ U of Delaware

Preferential flow plays an unknown role in the carbon cycle

9/17

Crystal Kolden

@ UC Merced

The cascading consequences of wildfire: understanding and mitigating
impacts to coupled human-natural systems

9/24

Allegra Mayer

@ UC Berkeley

Soil C sequestration potential in CA grasslands with compost amendments

10/1

Govind Dev Kumar

@ UGA

Salmonella's Trojan Horse Strategy to Evade Antimicrobial Stress

10/8

Charlotte Decock

@ Cal Poly, San Luis Obispo

Soil health and fertility assessment

10/15

Emma Hauser

@ U of Kansas

Integrated rooting system development and soil development structures
ecosystem nutrient dynamics

10/22

Will Kew

@ PNNL

High resolution mass spectrometry applied to organic matter/complex mixtures

10/29

Mary Salcedo

@ Virginia Tech

Form and function of insect wing veins

11/5

Todd Longbottom

@ UC Merced

Oxidative weathering of ancient organic matter and formation of modern soils

11/12

Asmeret Asefaw Berhe @ UC Merced

Finding and securing grants for students & postdocs

11/19

Adeyemi Adebiyi

@ UC Merced

How much solar radiation does atmospheric mineral dust absorb?

11/26

Thanksgiving holiday



12/3

Yamina Pressler

@ Cal Poly, San Luis Obispo

Soil food webs and organic matter in fire-affected savanna ecosystems

12/10

AGU
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