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lakes(20)
nutrients(17)
surface water(9)
nitrogen(7)
phosphorus(7)
water quality(4)
biomass(3)
carbon(3)
chlorophyll(3)
elements(3)
organic carbon(3)
water temperature(3)
contaminants(2)
eutrophication(2)
geochemistry(2)
agriculture(1)
atmospheric pressure(1)
carbon dioxide(1)
degradation(1)
drought(1)
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