Breeding birds of the Buitenkaadse Oostvaardersplassen in 1997, 2002 and 2007.
Published source details
Bijlsma R.G. (2008) Broedvogels van de buitenkaadse Oostvaardersplassen in 1997, 2002 en 2007. Altenburg & Wymenga, Veenwouden (A&W 1051) report.
Published source details Bijlsma R.G. (2008) Broedvogels van de buitenkaadse Oostvaardersplassen in 1997, 2002 en 2007. Altenburg & Wymenga, Veenwouden (A&W 1051) report.
This study is summarised as evidence for the following.
Employ grazing in non-grassland habitatsAction Link
Employ grazing in non-grassland habitats
A before-and-after study in Oostvaardersplassen reserve in Flevoland, the Netherlands (Bijlsma 2008), found significant changes in the bird community in a 1,900 ha area of wet and dry grasslands, reedbeds, scrub and small woodlands, following increased numbers of grazing animals. The number of breeding species declined from 92 to 70 and of the 41 species with more than ten breeding pairs, eight increased and 33 decreased. Shrub-dependent species declined, as did those requiring tall reeds to nest. The authors suggest that declines in some grassland species were due to increased trampling. The number of Heck cattle Bos taurus, Konik horses Equus ferus and red deer Cervus elaphus increased from 390, 284 and 246 respectively (in 1997) to 497, 982 and 1,898 in 2007 (with cattle peaking at 580 in 2002). This reduced the areas of reedbeds from 844 to 377 ha and of shrub and woodland from 97 to 50 ha. The area of dry grassland increased from 527 to 1,019 ha.