freshwater biology
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limnology
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aigua potable
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aquatic animals
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aquatic ecology
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aquatic sciences
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aquatische ecologie
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behavior
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benthos
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binnenwateren
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biological productivity
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catalogs and collections
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eau douce
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eau douce - productivité - mesure
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ecology
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ecosystemen
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ecosystems
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forschungsinstitut für rationalisierung e.v. an der rwth aachen
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fresh water
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fresh-water fauna
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freshwater ecology
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freshwater ecosystems
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freshwater production rate
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freshwater productivity
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freshwater productivity -- measurement
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freshwater productivity measurement
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groei
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growth
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