| 11. | It occurs in oligotrophic, moderate alkalinity lakes.
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| 12. | They fare best in somewhat oligotrophic water.
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| 13. | Based on available data, the lake's trophic state is classified as oligotrophic.
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| 14. | The largest concern in the Mediterranean is the local eutrophication of a naturally oligotrophic environment.
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| 15. | Being a domed bog, water enters the bog mainly from natural precipitation creating oligotrophic conditions.
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| 16. | These energy needs cannot be met in the extreme oligotrophic conditions that occur at great depths.
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| 17. | It may also occur in open areas, such as hydrophilic pastures near oligotrophic water bodies.
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| 18. | Aajuitsup Tasia is an oligotrophic lake of depth, covering an area of 1, 350ha.
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| 19. | These oligotrophic lakes show organic nitrogen and carbon as more limiting nutrients for trophic growth over phosphorus.
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| 20. | Hutchinson & Wollack suggested that following an initial oligotrophic stage lakes would achieve and maintain a trophic equilibrium.
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