Marker Wadden is an archipelago of nature islands in the center of the Netherlands, created with excess sediment form the bottom of the lake. The islands have been extensively researched over the past 5 years, on the themes:

Did water quality 

of the lake improve?

Which birds did find Marker Wadden?

Why did we see an explosion of sulphur bacteria?

Is better food

available now?

Is Marker Wadden

a stepping stone?

What is the role of

volunteers within


From dream

to reality

Did Marker Wadden

stay put during

the storms?

Why build with

soft sediments?

How much soft

sediment is collected

in the silt channel?

Marker Wadden:

a fish paradise?