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alkalinity
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ammonium
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anions
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aquatic
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aquatic ecosystems
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arctic
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bacteria
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bacterial abundance
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biogeochemistry
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carbon
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carbon to nitrogen ratio
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chemistry
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chlorophyll
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chlorophyll a
depth
dissolved nutrients
dissolved organic carbon
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freshwater
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inorganic nutrients
lakes
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limnology
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long term ecological research
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long term monitoring
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monitoring
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nitrate
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nitrate + nitrite
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nitrite
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nitrogen
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nitrogen compounds
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nutrients
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