EE BIOL 109 Lecture Notes - Lecture 8: Biological Pump, Physical Oceanography, Dust Storm
31 Dec 2017
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Eeb109 lec 8 notes (productivity and food webs) primary productivity. Chemosynthesis: reducing power = reduced inorganic compounds: h2s, nh3. Net pp = total carbon fixed respired. Shaped by: abiotic, temp, light, salinity, nutrients, function of depth, latitude, evaporation, precipitation, distance from land, physical oceanography, biotic forces, biotic, competition, predation. Dark/light bottle (sugar, water, oxygen: o2 light (photo) o2 dark (resp) = carbon fixed/oxygen from phoo = net pp, for every oxygen produced, there is one carbon produced, can use to measure effect of depth. Pacific has highest total opp: high pp in n pacific b/c of high nutrients, upwellings. Neritic systems are more productive than planktonic: disproportionate productivity among ecosystems. In atmosphere from respiration, fossil fuel burning, volcanoes. Global carbon emissions exceed capacity of biological pump. Dust storm blows iron, cause a bloom b/c it is an addition of nutrients. Critical to photosynthesis since it carries oxygen. Southern ocean is high nutrient but low productivity b/c region lacks iron (limiting)
