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Unformatted text preview: Measuring primary productivity: II. Patterns of productivity- most oceans have very low net primary production-topical rainforests very high NPP (also savannas and coastal)- coral reef is very low- ocean NPP is 46% even though 2/3 of planet is water Terrestrial productivity- length of growing season important moisture is limiting factor for growth (more cloud cover, less sun)- tropics:- warm- wet- lots of sun- long growing season- arid 30 o longitude- hot- long growing season- no water- temperate- water- cooler- shorter growing season- poles- cold- dry- short growing season get shift in composition in addition to increase in NPP if give fertilizer to wet and dry meadow...
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