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BIOL 3010 (47)

Ch 52

6 Pages

Course Code
BIOL 3010
Scott Schau

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Ch 52 Ecology and the Distribution of Life521ecology scientific study of rich and varied interactions btwn organisms and environmentcommunities systems embracing all the organisms loving together in the same areaecosystems systems embracing all organisms in an area plus their physical environmentenvironment encompasses abiotic physicalchemical ex water minerals and biotic living organisms factorsinteractions btwn organisms and environment are 2 way processes oorganisms both influence and are influenced by environmentunderstanding ecology allows us to manage ecosystems to grow food control pests deal with natural disasters etcecologists become familiar with various environments and understand how organisms adapt to them522climate average of atmospheric conditions temp precipitation wind direction velocity found over long term weather shortterm state of conditionsovary in different parts of world due to solar energydiff in air temp largely determined by solar energy inputrate at which solar energy arrives on Earth per unit of Earths surface depends on angle of sunlightohigh latitudes closer to poles get less solar energy than equatorial placesohigher latitudes have greater variation in day length and angle of arriving solar energy over year more seasonal variation in tempair temp decreases with elevation oair rises expands pressure and temp dropmoisture releasedglobal air circulation patterns result from global variation in solar energy inputintertropical convergence zone the coming together of air masses Air rises when it is heated by sun so warm air rises in tropics which receive greatest solar energy input Rising air is replaced by air that flows in toward equator from N Soheavy rains fall as rising air cools and releases moistureoshifts latitudinally with seasons following zone of greatest energy inputocan predict precipitation patterns in tropical and subtropical areasoair that replaces rising air in ICZ is replaced by air from aloft that descends at 30 N and S latitudes after having travelled away from equator in atmosphereoair cooledlost moisture while it rose to equator Now it descends warms takes up moisture ex Sahara and Australian desertsat poles little solar energy air descends responsible for global wind patternsspinning of earth on its axis also influences surface winds bc earths velocity is rapid at equator but relatively close to polesostationary air mass velocityearths velocity at same latitudeoas air mass moves toward equator meets a faster spin and its rotational movement is slower than earths beneath it
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