Microorganisms in
Freshwater
Environments L-4
presented by samiha
sultana tania
, Microorganisms in Glaciers and
Permanently Frozen Lakes
*A majority of the Earth’s surface never exceeds a
temperature of 5°C. This includes polar regions, the deep
oceans as well as high-altitude terrestrial locations
throughout the world.
*Microbes within glaciers are not dormant. Rather, active
microbial communities exist in these environments.
*Among the frozen landscapes of interest to microbiologists
are permanently frozen lakes, such as Antarctica’s
McMurdo Dry Valley Lakes where the ice is 3 to 6 meters
deep.
*Life in these ecosystems depends on the photosynthetic
activity of microbial psychrophiles.
*In contrast, lakes that lie below glaciers are blocked from
solar radiation. These communities are driven by
chemosynthesis.
Freshwater
Environments L-4
presented by samiha
sultana tania
, Microorganisms in Glaciers and
Permanently Frozen Lakes
*A majority of the Earth’s surface never exceeds a
temperature of 5°C. This includes polar regions, the deep
oceans as well as high-altitude terrestrial locations
throughout the world.
*Microbes within glaciers are not dormant. Rather, active
microbial communities exist in these environments.
*Among the frozen landscapes of interest to microbiologists
are permanently frozen lakes, such as Antarctica’s
McMurdo Dry Valley Lakes where the ice is 3 to 6 meters
deep.
*Life in these ecosystems depends on the photosynthetic
activity of microbial psychrophiles.
*In contrast, lakes that lie below glaciers are blocked from
solar radiation. These communities are driven by
chemosynthesis.
