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20 record(s) found with the tag "algae" (multi-year projects are grouped):
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The Effects of 24-Hour Daylight on Patterns of Diurnal Vertical Migration in Freshwater Epipelic Algae.
Principal Investigator: Hebben, Thorsten
Licensed Year(s): 1999
Summary: The objective of this study is to examine the migratory habits of epipelic algae in 10 small, shallow bodies of water in the region of the arctic circle. A 3/4 ton 4x4 pickup truck will be used to travel to each of ten ponds located 6 km north of Inuvik, N.W.T. The ponds will be sampled over a period of 2 days each between July 6 and July 20, 1999, using a technique perfected during the summer o...
Licensed Year(s): 1999
Summary: The objective of this study is to examine the migratory habits of epipelic algae in 10 small, shallow bodies of water in the region of the arctic circle. A 3/4 ton 4x4 pickup truck will be used to travel to each of ten ponds located 6 km north of Inuvik, N.W.T. The ponds will be sampled over a period of 2 days each between July 6 and July 20, 1999, using a technique perfected during the summer o...
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....
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....
The Effects of UV-B Radiation On the Community of Arctic Lakes
Principal Investigator: Perin, Sofia
Licensed Year(s): 1994
Summary: This study will be done by setting up 6 enclosures in a lake or pond. Two enclosures will be exposed to reduced UV-B levels, two other enclosures will be exposed to ambient UV-B levels, and finally two other enclosures will be exposed to enhanced UV-B levels. Regular measurements will be made of algae and invertebrates biomass, species composition, and pigment; and of algal photosynthesis and end ...
Licensed Year(s): 1994
Summary: This study will be done by setting up 6 enclosures in a lake or pond. Two enclosures will be exposed to reduced UV-B levels, two other enclosures will be exposed to ambient UV-B levels, and finally two other enclosures will be exposed to enhanced UV-B levels. Regular measurements will be made of algae and invertebrates biomass, species composition, and pigment; and of algal photosynthesis and end ...
Environmental Studies of the Aquatic Resources in the Lac de Gras Area.
Principal Investigator: Pelletier, Clem
Licensed Year(s): 1994
Summary: In project area streams, fish presence/absence and/or densities will be obtained by electrofishing representative habitat. Benthic invertebrates ans periphyton (stream algae) will be sampled at stream sites to determine seasonal changes in composition, distribution and abundance. Lake fisheries population studies will involve fish trapping. Lake limnology, plankton and benthic invertebrates wil...
Licensed Year(s): 1994
Summary: In project area streams, fish presence/absence and/or densities will be obtained by electrofishing representative habitat. Benthic invertebrates ans periphyton (stream algae) will be sampled at stream sites to determine seasonal changes in composition, distribution and abundance. Lake fisheries population studies will involve fish trapping. Lake limnology, plankton and benthic invertebrates wil...
Constraints To Ecosystem Development in High Arctic Polar Deserts
Principal Investigator: Bliss, Lawrence
Licensed Year(s): 1994
Summary: We seek to better understand how ecosystems develop in the high arctic following retreat of ice caps. This includes studies of soil development and the influence that rocks play in this as well as studying the development of block crusts of organisms that form on the soil surface. We will also try to understand the role these crusts play in fixing nitrogen and influencing the development of flower...
Licensed Year(s): 1994
Summary: We seek to better understand how ecosystems develop in the high arctic following retreat of ice caps. This includes studies of soil development and the influence that rocks play in this as well as studying the development of block crusts of organisms that form on the soil surface. We will also try to understand the role these crusts play in fixing nitrogen and influencing the development of flower...
Remote Sensing of Ocean Color in the High Arctic.
Principal Investigator: Cota, Glenn
Licensed Year(s): 1994 1993 1992 1991
Summary: Light leaving the ocean's surface can be detected remotely by satellite. With the proper conversion factors satellites can tell us the amount & growth of plant material in the oceans. Microscopic plants comprise the base of the marine food chain, serving as food for all animals. Because of their dark coloration plants absorb light & produce heat. We are studying what colors & how much light is abs...
Licensed Year(s): 1994 1993 1992 1991
Summary: Light leaving the ocean's surface can be detected remotely by satellite. With the proper conversion factors satellites can tell us the amount & growth of plant material in the oceans. Microscopic plants comprise the base of the marine food chain, serving as food for all animals. Because of their dark coloration plants absorb light & produce heat. We are studying what colors & how much light is abs...
From ice algae to sediments in the frozen arctic seas: the contribution of direct sedimentation and zooplankton grazing on the vertical flux of carbon
Principal Investigator: Fortier, Louis
Licensed Year(s): 1994
Summary: The researchers will be examining small marine organisms (algae, zooplankton and phytoplankton) to determine their influence on global warming. Carbon is necessary for the production of carbon dioxide (CO2), and increase levels of CO2 in the atmosphere can contribute to an increase in the earth's overall temperature. The study will examine how these small marine creatures can reduce carbon level...
Licensed Year(s): 1994
Summary: The researchers will be examining small marine organisms (algae, zooplankton and phytoplankton) to determine their influence on global warming. Carbon is necessary for the production of carbon dioxide (CO2), and increase levels of CO2 in the atmosphere can contribute to an increase in the earth's overall temperature. The study will examine how these small marine creatures can reduce carbon level...
Phylogenetics of Omphalina (Basidiomycotina, Agaricales) and the evolution of lichenization
Principal Investigator: Lutzoni, Francois
Licensed Year(s): 1993 1992
Summary: I will be collecting lichens in the vicinity of Iqaluit in order to better understand the variety of species that grow in the high arctic. Some species of fungi grow with algae: these partnerships are recognized as lichens. In an attempt to study this partnership, I will separate the fungi part from the algae and grow each separately in a laboratory. I will also be visiting Greenland and Icelan...
Licensed Year(s): 1993 1992
Summary: I will be collecting lichens in the vicinity of Iqaluit in order to better understand the variety of species that grow in the high arctic. Some species of fungi grow with algae: these partnerships are recognized as lichens. In an attempt to study this partnership, I will separate the fungi part from the algae and grow each separately in a laboratory. I will also be visiting Greenland and Icelan...
The role of soil algae in high arctic ecosystem development
Principal Investigator: Bliss, Lawrence
Licensed Year(s): 1993 1992 1991 1989 1988
Summary: The researcher will continue his long term work on plants in a high arctic polar desert. More specifically, this study will examine the small organisms that live in the soil and how these organisms interact with and provide benefits to plants....
Licensed Year(s): 1993 1992 1991 1989 1988
Summary: The researcher will continue his long term work on plants in a high arctic polar desert. More specifically, this study will examine the small organisms that live in the soil and how these organisms interact with and provide benefits to plants....
Trophic dynamics of the microbial community in cold ocean environments
Principal Investigator: Rivkin, Richard
Licensed Year(s): 1993
Summary: The proposed research will examine the importance of marine algae and bacteria in the polar food web. This research is similar to previous studies I have conducted which examined food webs in the Atlantic Ocean (off of the coast of Newfoundland) and Antarctica. In Resolute, I will measure the production and growth of natural populations of algae and bacteria under different light, temperature and...
Licensed Year(s): 1993
Summary: The proposed research will examine the importance of marine algae and bacteria in the polar food web. This research is similar to previous studies I have conducted which examined food webs in the Atlantic Ocean (off of the coast of Newfoundland) and Antarctica. In Resolute, I will measure the production and growth of natural populations of algae and bacteria under different light, temperature and...
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