The English Channel is subjected to a high and growing number of anthropogenic disturbances (e.g., fishing, aggregate extraction, dredging, port activity and spoil deposition). It is also a hotspot for future Offshore Wind Farm (OWF) development in France. The DRACCAR project is the first French offshore research platform dedicated to offshore wind energy. The aim of this project is to improve the understanding of the interactions between offshore wind energy and the environment, to optimise the design of wind turbines and to co-construct a permanent observation network of the maritime coasts. Six topics are thus studied: ecosystem approach; marine megafauna; fishery resources, biofouling and benthos; wind; structure behaviour and hydro-sedimentary processes. This poster presents the sampling strategy to collect data on the different ecosystem compartments of the Fécamp offshore platform in the Fécamp OWF site, adopting an ecosystem approach for the implementation of a trophic network analysis. This will allow to understand the reef and/or reserve effect of this offshore structure on a gravel habitat. For that, the collection of data on biological compartments (bacteria, phytoplankton, zooplankton, suprabenthos, soft bottom benthos, hard substrate benthos, algae, demersal fishes) are essential. Seasonal patterns will be studied during 2024 to estimate the contribution of each zoological group, with isotopic analyses and stomach contents on demersal fish. Additionally, steel panels will be installed at different distances from the platform wake with colonization to study the spatio-temporal dynamics of biofouling.