Effecten laag-dynamisch water- en natuurbeheer

Casper Cusell, Bart de Haan, Geert Kooijman, Gijs van Dijk, José van Diggelen & Annemieke Kooijman

begreppeling, plaggen, ontbossing, verzuring, eutrofiëring

The roadmap to recovering the Weerribben and Wieden

digging gullies, sod-cutting, deforestation, acidification, eutrophication

National Park Weerribben-Wieden is a hotspot of biodiversity in which the ecological quality has improved over the past 20 to 30 years. However, several habitat types are still under pressure as a result of high nutrient supplies, insufficient base supply, atmospheric nitrogen-deposition and afforestation. Due to these factors, the park suffers from two main problems: slow development of young terrestrializing vegetations and accelerated succession of older stages such as rich and poor fens. Although the current management of these older stages (consisting of sod-cutting, deforestation, summer-mowing and digging gullies) seems quite successful in Weerribben-Wieden, this management is inadequate to guarantee the area and quality of rich and poor fens in the long run. In addition, new formation of young terrestrializing vegetations is essential to guarantee a diversity of different successional stages in future. Although terrestrialization is starting up again, it
will take decades to develop new rich fens. For this reason, active ecohydrological management is highly desirable to improve water quality by increasing the base supply and reducing nutrient supply. In the meantime, it is very important to maintain, or even expand, the current well-developed populations of rich and poor fens.

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