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nutrients(31)
carbon(8)
organic matter(6)
nitrogen(5)
phosphorus(5)
population(4)
water quality(4)
nitrate(3)
aerosols(2)
agriculture(2)
atmosphere(2)
chlorophyll(2)
density(2)
estuaries(2)
fertilizers(2)
forests(2)
isotopes(2)
lakes(2)
mortality(2)
phosphate(2)
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