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Piburger See - Austria |
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Plynlimon - United Kingdom |
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Research Department for Limnology Mondsee - Austria |
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Restingas and coastal lagoons of the northern Rio de Janeiro - Brazil |
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Retezat Biosphere Reserve - Romania |
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Rhine-Main-Observatory - Germany |
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Rimov reservoir - Czechia |
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River Bure - United Kingdom |
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River Bush - United Kingdom |
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River Coln - United Kingdom |