Intro to chem: Dissolved oxygen
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At what concentration of oxygen are the waters considered hypoxic/ anoxic?
~2.3mg/L
What impact does barometric pressure have on [DO] in lakes? So what would be the difference between DO in an alpine vs valley lake? What about with depth?
Higher barometric pressure= increased [DO] in lakes so, an alpine lake holds less DO than a valley lake (all else equal) As you go deeper in a lake, [DO] will increase with the higher pressure
T/F Anoxia is more likely in systems that are cooler, more saline, or found at higher altitude
false WARMER, more saline, or higher altitude
T/F Salinity suppresses DO levels
true
How in turbulence mediated in streams vs lakes?
Lakes= wind Streams= gravity and stream morphology (bed/bank)