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Small initial measure with large effect

Close-up of a small water body. In the water there is a short trunk acting as a groyne. The water is deepened around the area of the trunk. The banks are covered with dried plant parts.

Initiated by a trunk acting as a groyne, the water has excavated a scour and deposited a gravel bank: two habitats for fish and benthic invertebrates.

Source: Werner H. Baur

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