[Chercheurs d'eau] 14 - Tourmente dans la rivière
Tout au long de sa course, la rivière vivante se transforme, en amassant eau et cailloux. Lors d'une crue, le petit monde aquatique est rudement malmené par les soubresauts du gravier. Des chercheurs nous expliquent comment les larves les plus fragiles trouvent leur salut dans cette tourmente. © Irstea - 2001
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