|The tell-tale isotopes: Towards indicators of the health of the Wadden Sea ecosystem
This thesis describes the complexity of food webs, analysed mainly with help of stable isotopes. Who eats whom in an ecosystem, and can this be translated to a food web that integrates time and space? How can food web studies by valuable? I searched for the possibilities to use the food web position of indicator species as an indicator for the (spatially) variable state of the Wadden Sea food web.