Studies of birds in grasslands

Biodiversity in peat grasslands of the Krimpenerwaard

In the Krimpenerwaard, the water level in the peat grasslands will be raised in the coming years and the banks of the ditches will be smoothened out. In Polder De Nesse and Berkenwoude this already started in 2017. We study habitat use of birds such as waders, ducks and herons in relation to these measures. We also investigate earthworms and insect densities and insects in wet and dry areas. In the first years, bird diversity appeared to increase and the grassland wetting did not have a negative impact on earthworms and insects. The project is commissioned by Provincie Zuid-Holland and is being carried out in collaboration with Zuid-Hollands Landschap, Courbois Flora & Fauna Expert and various volunteers.

Download report 2017-2021 (in Dutch)

Download report 2019 (in Dutch)

Download report  2017-2018 (in Dutch)

Download report Trends and the distribution of grassland birds in de Krimpenerwaard 1990-2021 (in Dutch)

 

The combination of rewetting measures improves bird community

Since 2016, the water level was raised in combination with flattening ditch banks. Would that work for the typical bird species of the peat grass landscape? In an evaluation of bird numbers, distribution and measures, we were able to demonstrate statistically significant improvements on a spatial scale for species such as black-tailed godwit, redshank and lapwing. The combination of measures is positive, including wetttened fields, higher water levels and the ditch banks. Great knowledge for follow-up projects.

Download report 2017-2020 (in Dutch)

 

Biodiversity in peat grasslands of the Krimpenerwaard

Network members

Jan van der Winden
Camilla Dreef
Peter van Horssen
Martin Poot

Other stakeholders

Zuid-Holland Landschap
Flora&Fauna Expert
Suzanne Kanters

Lowland Ecology Network

The Lowland Ecology Network is a network of freelancers who focus on ecological research, advice and communication. The emphasis is on nature protection of wetlands at home and abroad. Each participant has specific expertise and as a network we can respond fast and quickly solve complex issues. We are wel connected with experts on subjects  such as photography / film, design and nature legislation.

Network members

Jan van der Winden

Jan van der Winden Ecology, Research & consultancy

Jan van der Winden

Camilla Dreef

Camilla Dreef

Camilla Dreef

Peter van Horssen

GreenStat

Peter van Horssen

Martin Poot

Martin Poot Ecology

Martin Poot

Celine Roodhart

Roodhart Veldwerk

Celine Roodhart

Debby Doodeman

Debby Doodeman

Yvonne Verkuil

Yvonne Verkuil

Folkert de Boer

Folkert de Boer