EE BIOL 109 Lecture 4: Lecture 4 notes
17 Dec 2016
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Deep trench and volcanic islands from convergent boundries. High pressure doesn"t kill cuz net pressure is 0. Too much light at very surface so lower photosynthesis. Oxygen minimum zone is where oxygen is lowest concentration. Light affected by latitude and season therefore there is temperature variation too. Decreases in depth because of sun heats surface. Limits mixing and varies cuz temperature varies across latitude and season. Arctic (high lat) no thermocline (all water cold) Caribbean (low lat) perm themocline (water at top is always hot and water bellow is always cold) Cape cod (mid lat) seasonal thermocline (water at top is hot depending on season) Co2 + h2o <> h2co3 (hco3- + co3 2-) O2 initially increase then decrease, then increase with increasing depth. O2 lots at increasing depth cuz dense water sinks. Respiration also decrease with depth cuz less biomass. Thermocline circulation, waves mix o2 into cold salty water which sinks (cold = lots o2)
