The past couple of years, volunteers have been working to cut down trees, grass and reeds on a stretch of reclaimed land just outside Zaanstad. Last weekend they held an open day and I took the chance to take a boat tour through the labyrinth of canals and little islands.
Originally a swamp, the area was pumped dry and made suitable for agriculture probably somewhere around 1000 AD. For centuries the land was used by farmers, but over the last century the area was abandoned and nature was allowed to run its course. Reeds grew thicker and higher and bushes and eventually small trees started growing. This was of course beneficial to some species of plants and animals, but other species suffered. Birds, for instance, that prefer to build their nests in an open meadow refuse to breed when there are trees around, because that is where most of their natural enemies live. And so trees and bushes and reeds were cut down by human hands to favor one ecosystem over the other.
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