School of the Environment

Ashvini Chauhan, Ph.D.

Associate Professor
Environmental Biotechnology Laboratory
Fredric Humphries Science Research Center,
Suite 350B, School of the Envrionment (SoE)
Florida A&M University
1515 South Martin Luther King Jr. Blvd.
Tallahassee, FL 32307
Tel: 850-412-5119; Fax: 850-561-2248
Email:   Alternate Website:


•    Post-dcotoral: Florida A&M University 2005-2007; University of Florida (, 2001-2005
•    Ph.D., Environmental Biotechnology, Institute of Microbial Technology, Chandigarh, India, 1995-2000
•    M.S., Applied Botany, Panjab University, Chandigarh, India, 1992-1994
•    B.S., Biology, GGDSD College, Panjab University, Chandigarh, India, 1989-1992

Research Interests

My research is divided into the following fundamental areas: restoration ecology, assessments of impacts to environmental microogranisms from anthropogenic inputs such as ocean acidification; biodegradation of environmental pollutants, and use of microorganisms for biofuels and other value-added products. I am also interested in the application of bacterial genomics and metabolic tools to understand the evolutionary history and commercial applications of environmental microorganisms of interest. 

To accomplish above objectives, my laboratory is heavily engaged in the application and further development of cutting edge biotechnology tools such as qPCR, metagenomics, pyrosequencing, DNA/RNA based Stable Isotope Probig (SIP), comaprative bioinformatics and genomics. 


1.      U.S. Provisional Patent Application Docket # FAMU- 61/415,905. 2010. Precise and Sensitive Microbial Indicators of Mined Soil Health and Productivity. Ashvini Chauhan and Dawn E. Lewis.

2.       U.S. Provisional Patent Application Docket # UF-377P. 2002. Support Matrices for Immobilization of Anaerobic Consortia. Ashvini Chauhan and Andrew Ogram; UF#-11261.


1.      Wafula, D., J. White, A. Canion, C.H. Jagoe, Chauhan A. 2013. Impacts of Long-term Irrigation of Domestic Treated Wastewater on Soil Biogeochemistry and Bacterial Community Structure. Accepted pending revisions in PLoS One.

2.      Ashvini Chauhan, Stefan J. Green, Ashish Pathak, Jesse Thomas IV, Raghavee Venkatramanan. 2013. Whole Genome Sequencing of Five Oyster-associated Bacteria Show Potential for Crude Oil Hydrocarbon Degradation. Genome Announcements. In Press.

3.      Ashish Pathak, Stefan J. Green, Andrew Ogram, Chauhan A. 2013. Draft Genome Sequence of Rhodococcus opacus strain M213 Shows a Diverse Catabolic Potential. Genome Announcements. 1(1): e00144-12.

4.      Pineiro S., Chauhan A., Berhane T., Athar R., Zheng, G., Wang C., Dickerson T., Liang X., Lymperopoulou D.S., Chen H., Christman M., Louime C., Babiker W., Stine O.C. and Henry N. Williams. 2013. Succession of Bacteriovorax Operational Taxonomic Units along Salinity Gradient in the Chesapeake Bay Reveals Distinct Estuarine Strains. Microbial Ecology. 65:652-60.

5.      Chauhan A., A. Pathak, and A.V. Ogram. 2012. DNA-Stable Isotope Probing (SIP) Reveals a Shift in Methanotrophic Bacterial Guilds as a Function of Nutrient Loading in the Florida Everglades. Microbial Ecology. 64:750-759.

6.      Dawn E. Lewis, Chauhan A., John White, Will Overholt, Stefan J. Green, Puja Jasrotia, Denis Wafula. 2012. Microbial and Geochemical Assessment of Un-mined and Post-mined Chronosequence Soils from Mocho Mountains, Jamaica. Microbial Ecology. 64:738-749.

7.      Kenya Rolle, Margaret Gitau, Gang Chen, Chauhan A. 2012. Assessing Fecal Coliform Fate and Transport in a Coastal Watershed Using Hydrologic Simulation Program Fortran (HSPF) model. Water Science and Technology. 66(5):1096-102.

8.      Lewis, D., J., Martinez, C.A., Akpovo, L., Johnson, Chauhan A., and M.D. Edington. Discrimination of bacteria from Jamaican bauxite soils using Laser-Induced Breakdown Spectroscopy. 2011. Analytical and Bioanalytical Chemistry. 401(7): 2225-36.

9.      Lewis, D., J.R. White, D. Wafula, R. Athar, H.N. Williams, Chauhan A. 2010. Soil Functional Diversity Analysis of a Bauxite Mined Restoration Chronosequence. Microbial Ecology. 59:710-723.

10.  Chauhan, A., J. Cherrier and H. N Williams. 2009. Impact of Sideways and Bottom up Control Factors on Bacterial Community Succession over a Tidal Cycle. Proc. Natl. Acad. Sci. USA 106(11): 4301-4306.

11.  Chauhan A., G. Fortenberry, D. Lewis and H.N. Williams. 2009. Increased Diversity of Predacious Bdellovibrio- and like Organisms as a Function of Eutrophication in Kumaon Lakes of India. Curr. Microbiol. 59(1): 1-8.

12.  Chauhan, A., and H. N Williams. 2008. Biostimulation of Estuarine Microbial Community on Substrate Coated Agar Slides: A Novel Approach to Study the Phylogeny of Bdellovibrio-and Like Organisms. Micro. Ecol. 55: 640-650.

13.  Silvia A. Pineiro, Stine O.C., Chauhan A., Steyert S.R., Smith R., and Williams H.N. 2007. A global survey of diversity among environmental salt water Bacteriovoracaceae. Environ. Microbiol. 9(10): 2441-2450.

14.  Ilker Uz, Chauhan A., and A.V. Ogram. 2007. Cellulolytic, Fermentative, and Methanogenic Potential in Benthic Periphyton Mats from the Florida Everglades. FEMS Microbiology Ecology. 61:337-347.

15.  Chauhan A., and A.V. Ogram. 2006. Phylogeny of Acetate Utilizing Anaerobic Community along a Nutrient Gradient in the Florida Everglades. Appl. Environ. Microbiol. 72:6837-6840.

16.  Chauhan A., and H. N Williams. 2006. Response of Bdellovibrio and Like Organisms (BALOs) to the migration of naturally occurring bacteria to chemo attractants. Current Microbiology 53(6): 516-522.

17.  Chauhan A., and A.V. Ogram. 2006. Fatty acid-oxidizing consortia along a nutrient gradient in the Florida Everglades. Appl. Environ. Microbiol. 72:2400-2406.

18.  Chauhan A., A.V. Ogram and K.R. Reddy. 2006. Syntrophic archaeal associations differ with nutrient impact in a freshwater marsh. J. Appl. Microbiol. 100: 73-84.

19.  Chauhan A., and A.V. Ogram. 2005. Evaluation of support matrices for immobilization of anaerobic consortia for efficient carbon cycling in waste regeneration. Biochem. Biophys. Res. Commun. 327:884-893.

20.  Chauhan A., A.V. Ogram, and K.R. Reddy. 2004. Novel syntrophic-methanogenic associations along a nutrient gradient in the Florida Everglades. Appl. Environ. Microbiol. 70:3475-3484.

21.  Debarati Paul, Chauhan A., Gunjan Pandey and Rakesh K. Jain. 2004.  Degradation of p-hydroxybenzoate via protocatechuate in Arthrobacter protophormiae RKJ100 and Burkholderia cepacia RKJ200. Current Science 87(9): 1263-1268.

22.  Pandey G, Chauhan A., SK, Samanta and R.K. Jain. 2002. Chemotaxis of a Ralstonia sp. SJ98 toward co-metabolizable nitroaromatic compounds. Biochem. Biophys. Res. Commun. 299:404-409.

23.  Chauhan, A., A.K., Chakraborti, and R.K. Jain. 2000. Plasmid-encoded degradation of p-nitrophenol and 4-nitrocatechol by Arthrobacter protophormiae. Biochem. Biophys. Res. Commun. 270:733-40.

24.  Chauhan, A., S.K., Samanta, and R.K. Jain. 2000. Degradation of 4-nitrocatechol by Burkholderia cepacia: a plasmid-encoded novel pathway. J. Appl. Microbiol. 88:764-72.

25.  Chauhan, A., and R.K. Jain. 2000. Degradation of o-nitrobenzoate via anthranilic acid (o-aminobenzoate) by Arthrobacter protophormiae: a plasmid-encoded new pathway. Biochem. Biophys. Res. Commun. 267:236-44.

26.  Bhushan, B., Chauhan A., S.K., Samanta, and R.K. Jain. 2000. Kinetics of biodegradation of p-nitrophenol by different bacteria. Biochem. Biophys. Res. Commun. 274:626-630.

27.  Bhushan, B., S.K., Samanta, Chauhan A., A.K., Chakraborti, and R.K. Jain. 2000. Chemotaxis and biodegradation of 3-methyl- 4-nitrophenol by Ralstonia sp. SJ98. Biochem. Biophys. Res. Commun. 275:129-33.

28.  Samanta, S.K., B. Bhushan, Chauhan A., and R.K. Jain. 2000. Chemotaxis of a Ralstonia sp. SJ98 toward different nitroaromatic compounds and their degradation. Biochem. Biophys. Res. Commun. 269:117-23.

29.  Prakash, D., Chauhan A., and R.K. Jain. 1996. Plasmid-encoded degradation of p-nitrophenol by Pseudomonas cepacia. Biochem. Biophys. Res. Commun. 224:375-81.

Book Chapters/review articles:

1.      Mangwani, N., Hirak Ranjan Dash, Chauhan A., and Surajit Das. 2012. Bacterial Quorum Sensing: Functional features and potential applications in biotechnology. Journal of Molecular Microbiology and Biotechnology. 22:215-227.

2.      Ogram, A., Chauhan, A., Inglett, K., Jayachandran, K., and S. Newman. 2011. Linking Nutrient Impacts on Microbial Community Structure and Function with Biogeochemistry in the Everglades. Critical Reviews in Environmental Science and Technology. 41(6): 289-308.

3.      Ogram, A., Hector Castro, and Ashvini Chauhan. 2007. Methods of Soil Microbial Community Analysis. in C. J. Hurst, R. L. Crawford, J. L. Garland, D. A. Lipson, A. L. Mills, and L. D. Stetzenbach, editors. Manual of Environmental Microbiology, 3rd edition. ASM Press, Washington, D.C., Pages 652-662.      

 Currently Funded Grants    

1. PI, $558,472 (2011-2014): Phycoremediation of military wastewater pollutants and nutrients to generation of envrionmentally sustainable biobased products. Funded by DoD.

2. PI, $558,472 (2010-2014): Characterization of a novel napthalene metabolic pathwat in R. opacus M213 and comparative ecology of associated degradative gene(s) in contaminated military sites. Co-PI: Dr. A. Ogram (UF). Funded by DoD.


Contact Info

1515 S Martin Luther King Jr. Blvd
FSH Science Research Center
Tallahassee, Florida 32307

P: (850) 599-3550
F: (850) 599-8183