[Enviro-lunch] Enviro-lunch next Monday (10/25) about nitrogen cycling in a changing world

[Kyungjin Min]

[image: image.png]

Hello all,



Next Monday (10/25) Dr. Alex Krichels at UC Riverside will present his
research about dryland nitrogen cycling under climate change.  We hope to
see you between 12-1 pm (pacific) via zoom.



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



Title: How will dryland nitrogen cycling respond to global change factors?

Abstract: Despite exhibiting characteristics of nitrogen (N) limitation,
drylands can have high rates of N loss when biological N demand does not
correspond with periods of high N availability. For example, large pulses
of N can be lost to the atmosphere following rain events when rapid
microbial processes export N before plants can assimilate it. This
represents an important loss of N from dryland ecosystems, where biological
productivity is already N limited, and can also contribute to regional air
quality and the greenhouse effect. Human activity can affect the processes
responsible for dryland N trace gas production through multiple factors of
global change, including N deposition and altered precipitation regimes. In
this talk, I will explore the following questions: 1) what processes
produce nitric oxide (NO) and nitrous oxide (N2O) from dry soils? and 2)
how will these processes respond to factors of global change? To answer
these questions, I will present results from field experiments conducted
across a N deposition gradient and in response to experimentally altered
precipitation in Southern California drylands.

 [image: Krichels_headshot.jpeg]

Bio: Dr. Alex Krichels is a postdoctoral researcher of Environmental
Sciences at the University of California, Riverside. He has a Ph.D. in
Ecology, Evolution, and Conservation Biology from the University of
Illinois at Urbana Champaign and B.A.s in Environmental Studies and Biology
from Oberlin College. His research explores how factors of global change
affect the functioning of managed and natural ecosystems and how these
responses feedback to alter future global change. Currently, he is using
stable isotope and molecular techniques to study how nitrogen deposition
and altered precipitation regimes affect nitrogen cycling in dryland soils,
with consequences for regional air quality and Earth’s climate.



Sincerely,

co-host: KJ Min, Manisha Dolui, Toshiyuki Bandai, Jennifer Alvarez

faculty coordinator: Asmeret Asefaw Berhe

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Fall 2021 Enviro-Lunch Schedule

*date*

*speaker*

*title*

*10/25*

Alex Krichels

@ UCR

Nitrogen transformation in terrestrial ecosystems

*11/1*

Xuan Zhang

@UCM

Atmospheric modeling

*11/8*

Maggie Yuan

@UCB

rhizosphere processes

*11/15*

John Nimmo

@USDA

Preferential flow through unsaturated soil: How can we understand and
predict it?

*11/22*

Michael Kaiser

 @U of Nebraska

SOM dynamics

*11/29*

Thanksgiving

*12/6*

final prep
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