29 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
Licenced 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...


Biochemistry of Lakes in the Mackenzie Delta
Principal Investigator: Lesack, Lance
Licenced Year(s): 2016 2015 2014 2010 2009 2007 2006 2005 2004 2003 2002 2001 2000 1999 1998 1997 1996 1995 1994 1993
Summary: The researchers will be focused on two locations. At the Havik Pak Creek site, research will involve examining the chemistry of streamwater and the chemistry of lakes within selected sub-basins during the snowmelt period. At the NRC Lake and South Lake site, the research will involve measuring how well algae communities are able to grow when they experience concentrations of suspended sediments o...


Distribution and Physiological Adaptations of Stream Macroalgae in the High Arctic.
Principal Investigator: Sheath, Robert
Licenced 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
Licenced 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
Licenced 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
Licenced 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
Licenced 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...


Carbonate precipitation in the Mesproterozoic Society Cliffs Formation, Bylot Supergroup, on northern Baffin Island
Principal Investigator: Kah, Linda
Licenced Year(s): 1994 1993
Summary: Characteristics of ancient sediments reveal information about the chemical, biological and physical environment within which these sediments were formed. By studying the patterns of rocks found in the north Baffin area, I hope to discover how much of the formation of these rocks was due to the algae that lived in ancient oceans, and how much was due to the chemical makeup of the water. The resea...


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
Licenced 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
Licenced 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...


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