I am a soil microbiologist studying the connection between soil microbial communities and environmental outcomes. In my research I seek to integrate the analyses of these factors to better understand soil processes at the local level and translate that knowledge to broad scale understanding of microbial behavior/function. Further, with the advancement of computing tools (Machine learning, A.I.), I am interested in developing research projects and programs that work with these tools to answer unique and complex questions about microbial communities and the environment. Lastly, in my work I seek to better integrate localized microbial data into large-scale modeling efforts to improve model constraints.
My current research interests and activities revolve around the permafrost-affected areas of Alaska where I am investigating the time-resolved effects of the warming climate on the microbial community in these unique soils. My interests here lie in the ability to tie microbial measurements to changes in the amount of carbon lost and changes in soil carbon species through the first few months of warming conditions. I aim to better understand how diverse responses to warming affect long-term microbial colonization and activity in these soils, which should improve our ability to predict carbon loss.
I am from a small town in Tennessee where I grew up with an appreciation for education and practical knowledge of how things work. This naturally led me to pursue Microbiology research as an undergrad at The University of Tennessee where I began to be interested in the connections between microbes and the environment.
Breaking from my non-agrarian roots, I pursued my masters in Plant and Soil Science at Texas Tech under Dr. Katie Lewis (grad. 2018), where we investigated greenhouse gas production under soil conservation practices. I was able to continue this research while pursuing my Ph.D. at Texas A&M under Dr. Terry Gentry and Dr. Lewis (grad. 2021) where we focused more on the microbial drivers of greenhouse gas emissions and the temporal changes that occur with the implementation of conservation practices.
Outside of research, I have been able to have a variety of developmental experiences throughout my career including teaching two courses at Texas A&M during my Ph.D., participation in and leading delegations to advocate for increased science research funding, serving as head of the graduate committee, and participating in an intensive two-week course covering team-science, management, and inter-disciplinary research.
In my free time I enjoy food—both cooking and trying new cuisines—reading biographies and science fiction/fantasy, being active, and playing games with friends.
Ph.D.
Texas A&M University
Soil Science - Soil Microbiology
Masters
Texas Tech University
Plant and Soil Science
Research at Texas A&M AgriLife Lubbock
Undergraduate
The University of Tennessee, Knoxville
Microbiology
Argonne National Lab
Postdoctoral Appointee
Advisors: Roser Matamala, Julie Jastrow
Texas A&M University
Graduate Research Assistant
Advisors: Katie Lewis, Terry Gentry
Argonne National Lab
Postdoctoral Appointee
Advisors: Roser Matamala, Julie Jastrow
Texas A&M University
Graduate Research Assistant
Advisors: Katie Lewis, Terry Gentry
Influence of fertilizer and manure inputs on soil health: a review
Howe, McDonald et al,. 2024
Semi-arid soil bacterial communities are refined by altered plant selection pressure under conservation management practices
McDonald et al., 2024
Nitrogen fertilizer driven nitrous and nitric oxide production is decoupled from microbial genetic potential in low carbon, semi-arid soil
McDonald et al., 2023
Soil pore space gas probes for use in agricultural research
McDonald et al., 2021
Nitrous Oxide Consumption Potential in a Semi-Arid Agricultural System: Effects of Conservation Soil Management and Nitrogen Timing on nosZ Mediated N2O Consumption
McDonald et al., 2021
Short Term Cotton Lint Yield Improvement with Cover Crop and No-Tillage Implementation
McDonald et al., 2020
Carbon dioxide mitigation potential of conservation agriculture in a semi-arid agricultural region
McDonald et al., 2019
Feel free to reach out about R-codes, general research questions, and potential collaborations!
Mark McDonald: Soil Microbiology
Copyright © 2024 Mark McDonald: Soil Microbiology - All Rights Reserved.
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