Port of Rotterdam survey and monitoring non-native species conformHELCOM/OSPAR protocol

n 2014 a non-native species survey was conducted in the Port of Rotterdam, following the joint HELCOM/OSPAR survey and sampling protocol. The survey had two objectives: 1) provide an accurate list of non-native species present in the port of Rotterdam, and 2) evaluate the efficiency and efficacy of the HELCOM/OSPAR protocol. Depending on the results of that evaluation, some recommendations are suggested to be considered for the amendment of the joint HELCOM/OSPAR port sampling methodology.