Invasive Species Sloehaven Vlissingen

Harbors and marinas are not only a hotspot for shipping, but also for vegetable and animal stowaways that are transported unnoticed. They could be attached to the hull (biofouling) or be part of the ballast water. Dutch harbours are yearly monitored for invasive alien species using traditional methods like Rapid Assessments Surveys and SETL-plates, according to the OSPAR/HELCOM protocol. In this pilot study we want to compare the results of traditional sampling with metabarcoding results from water samples (eDNA) and sediment samples (bulk samples), in order to determine the added value of a genetic approach. All samples are taken at the Sloehaven in Vlissingen. Partners are Naturalis and GiMaRIS. This study is funded by the Ministry of Agriculture, Nature and Food Quality.

Amelander Sand Supplementation

To safeguard the protection of the land, the Ministry of Infrastructure and the Environment is developing a strategy for sand supplementation. Part of this strategy is an impact assessment on the response of biodiversity. In the autumn of 2017 a pilot supplementation starts at the Amelander Zeegat. Besides traditional monitoring we will study effects and recovery of zoobenthos and fish using metabarcoding techniques. Like in the Sloehaven project we will take samples from different depths of the water column and from the sediment, and compare the results with traditional monitoring to determine the added value of a genetic approach. Partners are Naturalis, GiMaRIS and the Ministry of Infrastructure and the Environment. This collaboration is part of the NKWK network.

Spatial Distribution North Sea Fish

Wageningen Marine Research (WMR) and Naturalis are collaborating on a project to study the spatial distribution of (commercial) North Sea fish. On a traject covering large parts of the North Sea, fish species are collected using trawls and identified and measured by WMR. Several specimens per species are conserved and subsampled to build up a DNA Barcoding library of North Sea fishes at Naturalis. Water samples are collected from the first meter of the surface with a Van Dorn sampler. The water samples will then be analysed on eDNA and compared with the DNA barcode library to identify species. Results from eDNA will be compared with the results of traditional trawls.