Current Group members

Asmeret Asefaw Berhe

Principal Investigator

Professor, Soil Biogeochemistry
Falasco Endowed Chair in Earth Sciences
email:aaberhe(at)ucmerced.edu

Fernanda Santos

Postdoc
email:fsantos4(at)ucmerced.edu

Research focus: Dynamics of pyrogenic carbon in soil, effect of combustion temperature on composition of dissolved organic matter in fire affected systems

https://www.fsantosresearch.com

Yang Yang

Postdoc (co-mentored with Steven C. Hart and Michael Goulden)
email:yyang103(at)ucmerced.edu

Research focus: biogeochemical cycles (e.g. carbon, nitrogen, mercury) in forest and freshwater ecosystems; Uncertainty analysis in ecosystem studies.
https://yangyang48.wixsite.com/research

Kyungjin Min

Postdoc
email:kmin4(at)ucmerced.edu

I am broadly interested in how the biotic (e.g., microorganisms, plants) and abiotic (e.g., minerals, temperature, pH, nutrient availability) interactions influence biogeochemical cycles in soil. At UCM, I investigate how deeply rooted plants affect deep soil organic matter storage and stabilization

Morgan Barnes

PhD Candidate
email:mbarnes7(at)ucmerced(dot)edu

Environmental Systems Graduate Group, UC Merced
co-advised by Stephen C. Hart

Research focus: Phosphorous Biogeochemistry, and effect of soil development on biogeochemical cycling of essential elements

Kimber Moreland

PhD Candidate
email: kmoreland(a)ucmerced.edu

Environmental Systems Graduate Group, UC Merced

Research focus:Dynamics of deep SOM, and climatic controls on biogeochemical cycling of essential elements

Manisha Dolui

PhD student
email: mdolui(a)ucmerced.edu

Environmental Systems Graduate Group, UC Merced

Research focus: Vulnerability of Buried Soil Carbon due to Future Climate Change

Leila Wehab

PhD student
email: lwehab(a)ucmerced.edu

Environmental Systems Graduate Group, UC Merced

Research focus: Effect of changing precipitation patterns on Soil organic nitrogen dynamics

Melinda Gonzales

PhD student
email: mgonzales36(a)ucmerced.edu

Environmental Systems Graduate Group, UC Merced

Research focus: role of biochar in reducing greenhouse gas fluxes from soil: effects of feedstock, pyrolysis temperature, and effectiveness for reducing methane fluxes form dairy waste.

Former lab group members

Dr. Lixia Jin

Former PhD. Student

Research focus: Role of metal oxides in soil organic matter dynamics, and distribution of natural nano-particulate metal oxides in soil

Dr. Rebecca Abney

Former PhD student

Lateral transport of pyrogenic C with soil erosion, and determining mean residence time of PyC in dynamic hillslopes

Visiting Scholar

Chun Liu

chun.jpg

Email: cliu90(at)ucmerced.edu / lspring(at)hnu.edu.cn

Hunan University (China) and State Key Lab of Soil Erosion and Dryland Farming on the Loess Plateau (China)

Current work: Source identification and ecological effect of eroded sediment organic carbon using multiple fingerprinting approach in small watershed of loess plateau of China.

quantum-threat-to-relativity_1_1

Veronika Ullman

Email: vullman(at)ucmerced.edu

Visiting student
University in Augsburg, Germany

Current work: Climatic controls on soil phosphorous speciation (with Morgan Barnes)

quantum-threat-to-relativity_1_1

Ray Alves 

Email: ralves(at)ucmerced.edu

Visiting student
University of Brasilia

Current work: Topographic controls on soil organic matter composition in tropical ecosystems

Lab Alumni

Chelsea Arnold

Washington 09 196

Ph.D. 2014, UC Merced
Environmental Systems Graduate Group
Co-advised by Teamrat A. Ghezzehei
Research focus: Coupled hydrology and biogeochemistry of high elevation meadow soils in the Sierra Nevada
Current: Director of CalTeach Program, School of Natural Sciences, UC Merced

Samuel Negusse Araya

Samuel

M.Sc. 2014, UC Merced
Environmental Systems Graduate Group
email
Research focus: The effect of combustion temperature on soil and soil organic matter properties
Current: Ph.D Student ES Graduate Group, UC Merced

Erin Stacy

OLYMPUS DIGITAL CAMERA


M.Sc.  2012, UC Merced
Environmental Systems Graduate Group
Co-advised by Stephen C. Hart
Research focus: effect of soil erosion on storage and stabilization of soil organic matter in the S. Sierra Nevada
Current: Field Manager for the Southern Sierra Critical Zone Observatory

 

Michael Kaiser

Michael photo


Former Postdoc (2010-2012)
currently a senior lecturer at University of Kassel, Germany
Research focus: effect of ultrasonication, air-drying rewetting on soil organic matter dynamics; effect of biochar and CaCO3 on soil aggregation

Current Position: Assistant Professor at University of Nebraska, Lincoln

 

Deoyani V. Sarkhot

Deoyani


Former Postdoc (2009-2010)
Research focus:nutrient enrichment of biochar with flushed dairy manure, effects on soils C and N dynamics
Currently at EcoPro, India

 

Emma McCorkle

Emma

M.Sc. student
Environmental Systems Graduate Group
UC Merced
Co-advised by Stephen C. Hart

Research focus: Using stable isotopes to determine source of organic matter eroded in low-order granitic catchments in the Sierra Nevada Mountains
Current position: Research technician, Reynolds Creek CZO, Moscow, ID

Rebecca Lever

Rebecca

 Ph.D. Candidate
Environmental Systems Graduate Group, UC Merced

Research focus: Lateral transport of pyrogenic C with soil erosion, and determining mean residence time of PyC in dynamic hillslopes

Current Position: Postdoc, Indiana University, Bloomington.

 

digging in grassland

Benjamin Sulman

Project scientist
email: sulman@ucmerced.edu

Research focus: Modeling the roles of microbial and mineral processes in soil organic matter formation, stabilization, and decomposition from ecosystem to global scales.Research focus: Effect of drought and variability of soil water input on soil carbon, aggregation, and water holding capacity

nate_field

Nathaniel Bogie

Postdoc
(Berhe lab and Ghezzehei lab)
email:nbogie@ucmerced.edu

Research focus: Effect of drought and variability of soil water input on soil carbon, aggregation, and water holding capacity

Jesseca Meyer

IMG_8155


Former Lab Manager
Current Position: High school Life Science teacher, Atwater, CA

Former Visiting Scholars

eli_bici3

Elisabet Nadeu
Visiting Ph.D. Student
Centro de Edafología y Biología Aplicada del Segura (CEBAS), Spain

 

Sebastian

Sebastian Doetterl
Visiting Postdoc
University of Ghent, Belgium

Yaxian photo
Moritz


Yaxian Hu
Visiting Postdoc
University of Basel, Switzerland

Moritz Mainka
Visiting student
University in Augsburg, Germany

Former Undergraduate Assistants

Matt

Matthew McClintock
Undergraduate Research Assistant
Currently a graduate student at Oregon State University

Group

Alexander Newman

  • Lateral redistribution of Fe and Al oxides  by soil erosion
  • Storage and stabilization of C in soil
Dziegiel_Abby_200_200_80auto_s_c1

Abigail Dziegiel
Yosemite REU student researcher

stephen
Stephen Ho
Yosemite REU student researcher

DSCN2515


Laura Jelpa
Undergraduate lab research assistant

Jennifer Gurrero
quantum-threat-to-relativity_1_1

Undergraduate lab research assistant

Intern

FullSizeRender

Alex Gueorguieva
(El Capitan High School student, Merced)
Research focus: Erosion in fire affected hillslopes

Current: Undergraduate Student at UC Berkeley