BIOLOGY 2F03 Lecture Notes - Rift Valley Lakes, Mesopelagic Zone, Pelagic Zone
Document Summary
Density oxygen, light, no h2o shortage, pressure. Breakdown ocean 97%, glaciers 2%, freshwater 1% (1/5 baikal, 1/5 great. Are chemical and physical conditions in the ocean similar at different latitudes: coriolis force, temperature, oxygen, evaporation range, density. Are chemical and physical conditions in the ocean similar at different longitudes. Winds influence: currents bring cold or warm water. Life in water: oceanic zone intertidal zone: very narrow zone near the coast difference between lowest tide and highest tide. Epipelagic zone: photosynthetic activity, 200m thick, top layer. Mesopelagic zone: decreasing light and temperature, still some penetration of light but no activity, a few organisms, limited in food. Balthypelagic zone: deep dark but open ocean, limited in food. Deceasing light and temperature: with depths produces a series of vertical habitat zones. Exponential loss of light, drop in oxygen, temperature: deep ocean is cooler, less oxygen because of diffusion. Open water and bottom habitats: not much algae or zooplankton.
