this page you can get a description of
activities, get a listing
of recent publications
Last Update 08/31/09
by BIKEDOG WEBPAGES
USGS Post doctoral program works on the interaction with bacterial isolates with aquifer mineralogy. The project will investigate how mineral composition controls the degree of subsurface migration in sandy aquifer material.
EPA-Funded project with USGS-Ohio works on the processes
EPRI & Breckinridge, CO-funded project with CSM, Golden, CO to investigate mechanisms affecting pathogen survival and movement in small-scale residential systems in alpine areas of the Rocky Mountains (to begin Dec, 2000).
NSF project with University of New Hampshire and the British Museum of Natural History has focused on laboratory and field experiments. These were designed to understand the ecological role of protozoa in contaminated aquifers, describe mechanisms controlling protozoan transport in the subsurface, understand how protozoan-bacterial communities interact under contaminant conditions, and describe types of protozoa found in subsurface environments. The future of this work will focus on pathogenic protozoa (Cryptosporidium/Giardia) and how they become transported in aquifer environments. Findings have included the first taxonomy of subsurface protozoa, mechanisms controlling the rate of protozoan transport, grazing rates of protozoa upon the bacterial community, carefully monitored changes in population dynamics, and advancements in proper culture techniques for isolation and characterization of subsurface protozoa.
USGS Massachusetts District collaboration has focused upon the mechanisms controlling bacterial transport with both cultured isolates and indigenous bacterial populations within contaminated and uncontaminated regions of the Cape Cod Aquifer. Findings have included widely cited parameters for bacterial transport and methods used in injection and recovery experiments. Additionally, coupled field and laboratory experiments have helped better understand the importance of specific mechanisms such as sorption-desorption, microbial buoyant density, and pH have in controlling bacterial transport.