ISCI 1001 Lecture Notes - Lecture 17: Limnetic Zone, Profundal Zone, Lake Nyos

• School: Carleton University
• Department: Interdisciplinary Science
• Course: ISCI 1001
• Professor: John Buschek

Document Summary

Habitat alternation: organisms adapt & fill realized niches. Alter habitat -> alter niches: now organisms are no longer optimally adapted. Invasive species: most organisms introduced into new areas. Die out: some may do well -> out competing native species. Climate change -> change habitats: niches. All water -> ocean (97. 5%) -> freshwater (2. 5%) -> surface (1. 0%), groundwater (20%), icecaps/glaciers (79%) (precipitation) Look at surface water: in organisms (1%, in rivers (1%, atm h2o vapor (8%, soil moisture (38%, lakes (52%) A- rivers/streams: sources: precipitation, melt water, spring water, h2o runs downhill to oceans. B- wetland ecosystems (combine freshwater + dry land): 3 varieties. Marshes -> shallow standing water + emergent plants. Bogs -> ponds thoroughly covered w/ malted vegetation. A littoral zone (part of a lake or pond where there is emergent) B open water -> limnetic zone. C at bottom -> benthic zone. D maybe (depends on depth: profundal zone (no light penetration)