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freshwater ecosystem 

2 record(s) found for principal investigator "Sheath, Robert" (multi-year projects are grouped):
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Distribution and Physiological Adaptations of Stream Macroalgae in the High Arctic.
Principal Investigator: Sheath, Robert
Licensed Year(s): 1994 1992
Summary: Microscopic algae in tundra streams constitute the base of food chains in these habitats yet they are poorly studied. Their composition appears to be an extension of a portion of the temperate flora. The research will continue a survey of these species and an examination of their physiological adaptations to such a stressful habitat....

Freshwater Red Algae in North America
Principal Investigator: Sheath, Robert
Licensed Year(s): 1987
Summary: To clarify freshwater red algae classification by determining key stable and non-overlapping structural characteristics needed to clearly separate species. Collecting trips will be made to all major drainage basins of the Atlantic, Pacific and Arctic. Preserved samples will be analyzed by computerized microscopy and live samples will be cultured under varied growth conditions to induce potential ...