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Oceans 11 Name Date Marine Biome Zones Label the map below with the marine biomes: tropical, temperate, polar. Polar Marine Biomes Consists of both the Arctic and Antarctic marine regions Ocean water rarely gets warmer than 10oC Salinity varies according to the season Primary productivity is limited by the availability of sunlight even though the water is cold and so has lots of dissolved carbon dioxide During the summer months, when sunlight is available 24 hours a day , the productivity peaks and there is an explosion of life but it is short-lived Temperate Marine Biomes Tropical Marine Biomes Conclusion Consists of both the north temperate region and the south temperate region Area is greater than the area of the tropical and polar regions combined Surface water temperature averages about 10OC Salinity is relatively constant Most prolific environment in terms of productivity Consists of the north tropical region, south tropical region and includes the equator Salinity varies from quite high (due to evaporation) to low at the equator (where river run-off is high) Tropical oceans nearly always have surface temperatures above 20 OC warm water holds less dissolved carbon dioxide than cooler water, therefore productivity is low exceptions include areas of coastal upwelling and coral reefs coral reefs are teeming with life but these areas only represent 2% of the tropical ocean area