BIOL 4280 Study Guide - Final Guide: Paraphyly, Euglenozoa, Periplasm

• School: University of Windsor
• Department: Biological Sciences
• Course: BIOL 4280
• Professor: Haffner G

Document Summary

Orthograde oxygen profile: oligotropic lakes (low productivity, oxygen concentration is at 100% saturation at all depths, overturn conditions: Delivery of o2 at air/water interface and mixing of entire water column under isothermal conditions. Respiration is minimized and mixing is maximized due to lack of thermostratification: summer stratification. Concentration of oxygen increases with depth due to elevated solubility of water in lower hypo limnetic temperature. Even though hypolimnion isolated from co2 delivered by air; consumption of o2 by respiration insufficient reduce co2wat below saturation. Clinograde oxygen profile: summer stratification in eutrophic lakes (highly productive) Oxygen delivery at air/water interface + photosynthesis maintains co2wat at saturated conditions in epilimnion. Respiration activities draw co2 in hypolimnion below co2(wat)sat. Extreme cases= hypolimnion goes anoxic (dead zones: winter stratification (inverse stratification) in eutropic lakes. Despite replenishment of o2 during fall overturn. Draw down of o2 in hypolimnion over winter reduces oxygen concentration especially near sediment/water interface. Exacerbated when # of ice cover days is higher.