Biology 2485B Lecture Notes - Upwelling
17 Apr 2014
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Document Summary
Salt water: key number 3. 5% average concentration of salt in the ocean, higher in some condition (cid:224) colder water is saltier, cold salt water has a tendency to sink due to higher density, thermoclines temperature gradient of water, surface temperature is warmer in water places, deep water is colder due to insulation from temperature, higher salt concentration in cold deep water. Ocean productivity: measured by chemical energy produced by photosynthesis, coasts and northern hemisphere have greater productivity, high productivity, coasts more productive than open ocean (gyres, polar regions stronger thermocline, more movement of water, coral reefs zooexanthallae death and ejection of symbiont = bleaching, acidification (cid:224) temperature change, sunlight, pollution, salt marshes water goes up and down, important for reproduction site and diluted salt concentration, capacity to absorb water, prevent flooding, mangrove forest high salinity, oxygen retrieve though unsubmerged roots, very low photosynthetic rate need lots of water, plankton and nekton many near upwellings.
