BIOL 1113 Lecture 6: Aquatic Ecosystems
20 Nov 2017
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Opening notes: of earth"s surface, but not limitless!, mostly cold and dark around 4 degrees c, physio-chemical gradients gradual and subtle (vs. land) may have to travel 100s of kms to get to difference. Ocean circulation: land mass, earth"s spin, celestial objects bounces off land mass and deflects. All of rotations in all oceans in hemisphere are the same, consequence of earth"s spin. The sun exerting greater pull on lens of water than moon, when they interact we get high tides. Pull up lens of water that are attracted to celestial objects, and takes a while before it goes down. Important for generating currents: profound influence on air circulation, land precip and temps (e. g. , gulf stream and. Europe) scandinavia remaining relatively warm, due to gulf stream. Labrador current, inserts itself between us and gulf stream. Marine food webs: o2 decreases in warm h2o, but deep ocean mostly cool productivity is higher in aerobic conditions.
