Research Summary
Research interests include geomicrobiology, biogeochemistry and astrobiology, microbial behavior and evolution. Ongoing projects include cave microbiology, Early Earth Photosynthesis, methane oxidation, lipid biogeochemistry and deep biosphere genomics.
In the News
Research Keywords
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Projects
Recent Publications
A reassessment of the “hard-steps” model for the evolution of intelligent life
Mills, D. B., Macalady, J. L., Frank, A. & Wright, J. T., Feb 14 2025, In: Science Advances. 11, 7, eads5698.Research output: Contribution to journal › Review article › peer-review
Enrichment of acid-tolerant sulfide-producing microbes from an acidic pit lake
Liu, Y., Macalady, J. L., Sánchez-España, J. & Burgos, W. D., 2024, In: Frontiers in Microbiology. 15, 1475137.Research output: Contribution to journal › Article › peer-review
Sulfur disproportionating microbial communities in a dynamic, microoxic-sulfidic karst system
Aronson, H. S., Clark, C. E., LaRowe, D. E., Amend, J. P., Polerecky, L. & Macalady, J. L., Nov 2023, In: Geobiology. 21, 6, p. 791-803 13 p.Research output: Contribution to journal › Article › peer-review
Thiovibrio frasassiensis gen. nov., sp. nov., an autotrophic, elemental sulphur disproportionating bacterium isolated from sulphidic karst sediment, and proposal of Thiovibrionaceae fam. nov.
Aronson, H. S., Thomas, C., Bhattacharyya, M. K., Eckstein, S. R., Jensen, S. R., Barco, R. A., Macalady, J. L. & Amend, J. P., 2023, In: International journal of systematic and evolutionary microbiology. 73, 8, 006003.Research output: Contribution to journal › Article › peer-review
Carbonates in the Critical Zone
Covington, M. D., Martin, J. B., Toran, L. E., Macalady, J. L., Sekhon, N., Sullivan, P. L., García, A., Heffernan, J. B. & Graham, W. D., Jan 2023, In: Earth's Future. 11, 1, e2022EF002765.Research output: Contribution to journal › Review article › peer-review
Convergent Community Assembly among Globally Separated Acidic Cave Biofilms
Jones, D. S., Schaperdoth, I., Northup, D. E., Gómez-Cruz, R. & Macalady, J. L., Jan 2023, In: Applied and environmental microbiology. 89, 1Research output: Contribution to journal › Article › peer-review
Metagenome-Assembled Genomes from Appalachian Acid Mine Drainage Sites
Williams, C., Macalady, J. & Grettenberger, C., May 2023, In: Microbiology Resource Announcements. 12, 5Research output: Contribution to journal › Article › peer-review
Microbial carbon, sulfur, iron, and nitrogen cycling linked to the potential remediation of a meromictic acidic pit lake
Ayala-Muñoz, D., Macalady, J. L., Sánchez-España, J., Falagán, C., Couradeau, E. & Burgos, W. D., Dec 2022, In: ISME Journal. 16, 12, p. 2666-2679 14 p.Research output: Contribution to journal › Article › peer-review
Novel Microorganisms Contribute to Biosulfidogenesis in the Deep Layer of an Acidic Pit Lake
Ayala-Muñoz, D., Burgos, W. D., Sánchez-España, J., Falagán, C., Couradeau, E. & Macalady, J. L., Jul 13 2022, In: Frontiers in Bioengineering and Biotechnology. 10, 867321.Research output: Contribution to journal › Article › peer-review
Thousands of small, novel genes predicted in global phage genomes
Global Phage Small Open Reading Frame (GP-SmORF) Consortium, Jun 21 2022, In: Cell Reports. 39, 12, 110984.Research output: Contribution to journal › Article › peer-review
Functional redundancy imparts process stability to acidic Fe(II)-oxidizing microbial reactors
Ayala-Muñoz, D., Simister, R. L., Crowe, S. A., Macalady, J. L. & Burgos, W. D., Jul 2021, In: Environmental microbiology. 23, 7, p. 3682-3694 13 p.Research output: Contribution to journal › Article › peer-review
Organic Stabilization of Extracellular Elemental Sulfur in a Sulfurovum-Rich Biofilm: A New Role for Extracellular Polymeric Substances?
Cron, B., Macalady, J. L. & Cosmidis, J., Aug 6 2021, In: Frontiers in Microbiology. 12, 720101.Research output: Contribution to journal › Article › peer-review
Another chemolithotrophic metabolism missing in nature: sulfur comproportionation
Amend, J. P., Aronson, H. S., Macalady, J. & LaRowe, D. E., Jun 1 2020, In: Environmental microbiology. 22, 6, p. 1971-1976 6 p.Research output: Contribution to journal › Letter › peer-review
Metagenomic and metatranscriptomic study of microbial metal resistance in an acidic pit lake
Ayala-Muñoz, D., Burgos, W. D., Sánchez-España, J., Couradeau, E., Falagán, C. & Macalady, J. L., Sep 2020, In: Microorganisms. 8, 9, p. 1-271350 271350 p., 1350.Research output: Contribution to journal › Article › peer-review
Microbial population structure in a stratified, acidic pit lake in the Iberian Pyrite Belt
Grettenberger, C. L., Mccauley Rench, R. L., Gruen, D. S., Mills, D. B., Carney, C., Brainard, J., Hamasaki, H., Ramirez, R., Watanabe, Y., Amaral-Zettler, L. A., Ohmoto, H. & Macalady, J. L., Jul 1 2020, In: Geomicrobiology Journal. 37, 7, p. 623-634 12 p.Research output: Contribution to journal › Article › peer-review