Rijkswaterstaat has an effort-obligation and result-obligation to take measures to achieve the goals of the Water Framework Directive (WFD) at the Eastern Scheldt and Lake Grevelingen. The WFD aims to achieve and protect a sufficient ecological and chemical status of inland surface waters, transitional …

Early links in the food web are crucial to sustain higher levels in the food web. Molecules of high importance, for example unsaturated fatty acids, play a key role in aquatic ecosystems. Unsaturated fatty acids are produced by primary producers for instance phytoplankton. Almost all organisms need to …

Water pollution by arsenic (As) is a problem in many areas of the world for both ecology and humans. To remove arsenic from surface water an environmental-friendly method called phytoremediation could be used. This method includes the usage of plants to accumulate toxins from any environmental soil, …

Daily life is greatly influenced by fossil fuels. New technological inventions and the reduction of the ice coverage due to climate change makes it possible for humans to be present and undertake activities, such as gathering oil in previously inaccessible areas like the North Pole (Sagerup, Nahrgang, …

The research presented in this thesis has highlighted (bio)geochemical, hydrological, and wetland ecological processes that interact and enhance ecosystem development on wetlands built on fine sediment. A combination of greenhouse and laboratory experiments were conducted. Some measured data from these …

To ensure stability for ships, ballast water is often used to correct or adjust the list or trim of a ship. After loading the ballast water is often carried across the ocean and discharged in an area with another aquatic environment. As a result, invasive species can end up in the water and effect the …

The goal of this graduation paper is a literature review on the effect of light and nitrogen availability on the pigment composition, photosynthesis and growth of different phytoplankton groups.

Urban delta areas require innovative and adaptive urban developments to face problems related with land scarcity and impacts of climate change and flooding. Floating structures offer the flexibility and multi-functionality required to efficiently face these challenges and demands. The impact of these …

Fish have the natural behaviour to move across various aquatic ecosystems and for some species this is of vital importance. Migration is often a seasonal phenomenon which occurs in order to move between habitats, such as winter refuges-, foraging- and spawning or nursery habitats, also escaping unfavourable …

De ecologische kwaliteit van het waterlichaam Bielheimerbeek is in de loop van de decennia’s verslechterd door menselijke invloed en ingrepen in het watersysteem. Het gevolg is dat het watersysteem matig scoort voor vissen en macrofauna. De maatregelen met ecologische doelstellingen zijn voor waterschap …