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Geomicrobiologists study microbial interactions with earth materials: soils, sediments, solutes, atmospheric gases, minerals, and rocks. They see microorganisms as agents of geologic and environmental change, and the earth system as a crucible for the evolution of life. They explore how microorganisms shape earth's environment in the present and over geologic time scales, and are at the forefront of efforts to explore the uncharted microbial world. There are important links between geomicrobiology and astrobiology (the study of life in the universe), the origin of life, paleobiology, nanoscience, soil science, limnology, oceanography, global climate change, medical microbiology, and environmental engineering.
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List of Publications 1 Dattagupta, S., Schaperdoth, I., Montanari, A., Mariani, S., N. Kita, J. W. Valley, and Macalady, J. L. 2009 A Recently Evolved Symbiosis Between Chemoautotrophic Bacteria and a Cave-dwelling Amphipod. In press, ISME Journal. | Macalady, J. L. , S. Dattagupta, I. Schaperdoth, G. K. Druschel, D. Eastman. 2008 Niche differentiation among sulfur-oxidizing bacterial populations in cave waters. ISME Journal 2: 590-601. | Strapoc D., F. Picardal, C. Turich, I. Schaperdoth, J. L. Macalady, J. Lipp, Y.-S. Lin, T. Mohr, F. Schuboltz, K.-U. Hinrichs, M. Mastalerz, A. Schimmelmann. 2008 Coalbed methane-producing microbial community in the Illinois Basin. Applied and Environmental Microbiology 74(8):2424-2432. | Jones, D. S., Lyon, E. H., and Macalady, J. L. 2008 Geomicrobiology of sulfidic cave biovermiculations. Journal of Cave and Karst Studies 70(2):78-93. | f
Macalady, J. L. , D. S. Jones, and E. H. Lyon. 2007 Extremely acidic, pendulous microbial biofilms from the Frasassi cave system, Italy. Environmental Microbiology, 9(6): 1402-1414. | Macalady, J. L., Lyon, E.H., Koffman, B., Albertson, L. K., Meyer, K., Galdenzi, S. and Mariani, S. 2006 Dominant microbial populations in limestone-corroding stream biofilms, Frasassi cave system, Italy. Applied and Environmental Microbiology 72(8):5596-5609. | Hose, L.D. and Macalady, J. L. 2006 Observations from active sulfidic karst systems: Is the present the key to understanding Guadalupe Mountain speleogenesis? New Mexico Geological Society Guidebook, 57th Field Conference, Caves and Karst of Southeastern New Mexico. | Lyon E., Koffman B., Meyer K., Cleaveland L., Mariani S., Galdenzi S., and J. L. Macalady 2006 Geomicrobiology of the Frasassi Caves. In Frasassi 1989-2004: Gli sviluppi nella ricerca (S. Galdenzi, ed.), pp. 152-157. | Macalady, J. L. , and J. F. Banfield. 2003 olecular geomicrobiology: genes and geochemical cycling [invited Frontiers review ]. Earth and Planetary Science Letters 209 (1-2): 1-17. |
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| Current Activity | Please contact me if you are interested in joining the Geomicrobiology Group.
Undergraduates
***REU positions available summer 2009.***
NSF REU in Geomicrobiology
Women in Science and Engineering Research (WISER)
Astrobiology Summer Program (NSF REU)
ACS Minority Scholarship program
Postdocs
NSF Earth Sciences Postdoctoral Fellows (NSF 07-596) Due Jan. 2009
L'Oreal Fellowship for Women in Science
NASA Postdoctoral Program
other NSF postdoc programs
ASM Women's Career Development Grants ($1200)
Graduate Students
For Penn State graduate school see:
Geosciences Department
Ecology Interdepartmental Degree Program
Astrobiology Dual Title Ph.D. Program
Biogeochemistry Dual Title Ph.D. Program |
| Albums (2) | 
Cave Microbiology | 
Geomicrobiology Lab
The newly redesigned and renovated Geomicrobiology Lab is housed in ~800 sq. ft. of space on the 2nd floor of the Deike Building adjacent to existing labs for Microbial Geobiology (Chris House), Isotope Biogeochemistry (Kate Freeman), and Aqueous Geochemistry (Sue Brantley). The new lab is designed to facilitiate the flow of people and ideas between labs. |
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