[Enviro-lunch] Reminder: Enviro-Lunch seminar today (3/14)by Dr. Darian Smercina on soil microbial nitrogen fixation

[Manisha Dolui]

Hello all,
Please join us today for our Enviro-lunch seminar series. Today our guest speaker is Dr. Darian Smercina from Pacific Northwest National Laboratory (PNNL) who will present her research about soil microbes and nitrogen cycling. Please join us today between 12-1 pm (PST) via zoom.



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





Title: Micro to Macro: Soil Microbial Communities and Biogeochemistry

See you all soon!

Regards,
Manisha and KJ
________________________________
From: Enviro-lunch <enviro-lunch-bounces at lists.ucmerced.edu> on behalf of Kyungjin Min <kjmin.21 at gmail.com>
Sent: Wednesday, March 9, 2022 12:03 PM
To: enviro-lunch at lists.ucmerced.edu <enviro-lunch at lists.ucmerced.edu>
Subject: [Enviro-lunch] Enviro-Lunch (3/14): Dr. Darian Smercina on soil microbial nitrogen fixation

[image.png]

Hello all,



Next Monday (3/14) Dr. Darian Smercina from Pacific Northwest National Laboratory will present her research about soil microbes and nitrogen cycling. Please join us between 12-1 pm (pacific) via zoom.



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





Title: Micro to Macro: Soil Microbial Communities and Biogeochemistry

Abstract: Soil microorganisms are the engines that drive global biogeochemical cycles, impacting the flow of nutrients to all life on Earth and many ecosystem services we depend on, such as crop production and carbon sequestration. Yet, while ecosystem processes are measured at macroscales, the underlying microbial functions occur at micro-scales over a million times smaller than that of their impact. Linking soil microorganisms and microbial scale processes to macroscale ecosystem function remains one of the greatest challenges in soil microbial ecology, necessitating multi-scale approaches to link soil microorganisms and ecosystem processes. My work has used a multi-scale approach to study the controls on and contributions from free-living nitrogen fixation (FLNF). FLNF, biological nitrogen fixation carried out by heterotrophic bacteria in soils, is an important ecosystem process and terrestrial N source. Globally, FLNF is estimated to contribute approximately one-third of all biological fixed N each year. However, the controls on this process and the mechanisms of resulting nitrogen contributions remain poorly understood. I will present on a series of studies examining these controls and contributions from FLNF across scales from macroscale field studies to microscale microbial studies.



Bio:

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I am a Linus Pauling Distinguished Postdoctoral Fellow at Pacific Northwest National Lab in the Biological Sciences division. I received my PhD in crop and soil sciences from Michigan State University in 2020 following completion of my BS in Biology from the University of Toledo.





Sincerely,

co-host: KJ Min & Manisha Dolui

Faculty coordinator: Asmeret Asefaw Berhe

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Spring 2022 Enviro-Lunch Schedule

date

speaker

title

1/31

Mariela Garcia Arrendondo
@ Umass-Amherst

Root-mediated weathering

2/7

Michael Philben
@ Hope College

Rethinking carbon and nitrogen isotope fractionation during soil organic matter decomposition

2/14

Alyssa Griffin*
@ UC Davis

The role of coastal marine sediments in carbon cycling from local to global scales

2/21

Presidents’ day



2/28

Katherine Heckman
@ USDA

Density fractionation and soil carbon stabilization

3/7

Bhavna Arora
@ LBNL

Reactive transport modeling

3/14

Darian Smercina
@ PNNL

Free N fixing under switchgrass (Linking microbial scale processes to ecosystem function)

3/21

spring break



3/28

Meng Zhao
@ Stanford U

Plant-water relationship (evapotranspiration) modeling

4/4

Hannah Naughton
@ LBNL

Root vs. topographic generation of redox anomalies on a subalpine hillslope and floodplain

4/11

Michael Rowley
@ LBNL

Ca-mediated soil organic carbon stabilization

4/18

Weiyu Li*
@ Stanford U

Data-driven hydraulic modeling

4/25

Daniel Zuleta

@ Smithsonian Institute

Tree mortality in tropical ecosystems

5/2

Genevieve Noyce
@ Smithsonian Institute

Greenhouse gas emissions from wetland with climate change






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