4 Marine Ecosystem Characteristics Abiotic factors determine life in the oceanTemperature: As you get deeper, the temperature decreasesDepth: Affects what organisms can live thereSunlight: How far the sun reaches affects life in ocean
5 Temperature ZonesSurface Zone- warm top layer extending to 300 meters below sea level. Sun warms water & surface currents heat warm/cool watersThermocline- 300 meters to 700 meters below sea level; here water temperature drops fastest with increasing depthDeep Zone- from base of thermocline to bottom of oceanAverage Temperature= 2 Celsius
7 Intertidal Zone- “between tides” Ocean meets land; animals adapt the exposure of air and waves; snails, herons live hereNeritic Zone- downward slope; warm water from sun; corals, sea turtles, fish, dolphins live hereOceanic Zone- sea floor drops sharply! Deep water of open ocean; plankton near surface, whales, shark, fish live hereBenthic Zone- deepest, dark ocean; Very cold water/no sunlight reaches; Get food that is dropped or from thermal vents; crabs, worms, and animals adapted to darkness
8 Ocean Zones: p. 536 in textbook Intertidal Zone:
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