IMPACTS: "The Effects of Offshore Wind Farms on Hydrodynamics and Implications for Fishes" - van Berkel et al., 2020
The rapid expansion of offshore wind energy in the North Sea not only transforms the energetic use of marine space, but also has profound physical and ecological effects on hydrodynamic processes and marine communities. The article “The Effects of Offshore Wind Farms on Hydrodynamics and Implications for Fishes” by van Berkel et al. (2020) presents a well-founded, model-based analysis of these complex interrelationships. It demonstrates how offshore wind farms alter current patterns, turbulence regimes, and vertical mixing in coastal seas – with far-reaching implications for fish populations and food webs.
The authors combine hydrodynamic models with ecological simulations and show that wind farms, through their physical structures, influence energy input into the water column. This, in turn, affects the distribution of nutrients, phytoplankton production, and thus fish habitat use. Such effects can be regionally significant, especially in the southern North Sea – with possible consequences for the availability of spawning and nursery habitats, as well as for commercially important fish species.
The article emphasizes that hydro-ecological feedbacks have so far been insufficiently considered in the planning and assessment of offshore wind energy projects. Van Berkel et al. therefore advocate for the greater integration of large-scale physical-ecological models into environmental assessments and spatial planning processes in order to better predict and manage long-term, cumulative effects. The study makes an important contribution to a systemic, future-oriented understanding of the ecological transformation of marine spaces through offshore infrastructure.