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. 2020 Apr 22;70(5):427–438. doi: 10.1093/biosci/biaa033

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© The Author(s) 2020. Published by Oxford University Press on behalf of the American Institute of Biological Sciences.

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is properly cited. For commercial re-use, please contact journals.permissions@oup.com.

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Figure 1. — Intermittent rivers in contrasting climatic regions during flowing and dry phases: (a) Cérvol, in Mediterranean-climate Spain. (b) Manifold, oceanic England, United Kingdom. Photographs: (a) Núria Cid. (b) Nick Mott.