Systems Microbial Ecology Laboratory

DEES Chris Fritsen

Lab Description

Systems Microbial Ecology LaboratoryThe Microbial Ecology Laboratory provides facilities for conducting a broad range of ecological studies concerning soil, sediment, and aquatic microorganisms. These studies include the processing and analysis of water and sediment samples from Antarctic lakes and ice; culturing and characterizing of ice biota; and storing and processing periphyton samples from the western U.S.

Our lab produces results that are used in the management of the natural resources in the oceans and inland waters. Ongoing research is being used to help determine what factors are causing changes in Antarctic Krill populations (Krill being one of the last major fisheries in the Southern Ocean). The lab studies nutrient utilization and cycling in rivers of Nevada and how human disturbance and restoration practices deter or enhance the beneficial uses of these rivers. Last but not least, the lab studies microbial ecosystems and microbial adaptations that may help us understand the limits of life in polar environments. This work has direct implications for understanding the habitability and evolution of life on Earth and planning future exploration missions to Mars. As a consequence of our efforts, several natural products of microbes have potential of being developed and applied in biotechnology. For instance, cold adapted microbes often possess proteins that alter how ice crystals form. Such proteins are likely to be beneficial in the transportation and health applications.

State-of-the-art equipment for analyses of microalgae include standard microbiological instrumentation for culturing and observing bacteria, algae and protozoa; including centrifuges, balances pH meters, fume hood, fluorometer (Turner Designs 10-AU), spectrophotometer (Crary 300), light and temperature-controlled incubators, DO and pH electrodes, water quality sondes (YSI), vacuum lines and pumps, vacuum manifolds and filtration apparatus, autoclave, drying and ashing ovens, refrigerator and freezer, and two gas chromatographs with FID and TCD detectors. A research epifluorescence microscope (Olympus BX-60 with cryostage) is equipped with Digital cameras and integrated to digital image analysis system. The positive-pressure clean rooms are temperature controlled for ice core processing and sample preparation. Freezer rooms dedicated for the cultivating of low temperature-brine biota are outfitted with backup power and alarm systems to maintain cold conditions necessary for long-term cold-oriented research.

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