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Offshore wind energy and marine biodiversity in the North Sea: life cycle impact assessment for benthic communities
Li, C.; Coolen, J.W.P.; Scherer, L.; Mogollón, J.M.; Braeckman, U.; Vanaverbeke, J.; Tukker, A.; Steubing, B. (2023). Offshore wind energy and marine biodiversity in the North Sea: life cycle impact assessment for benthic communities. Environ. Sci. Technol. 57(16): 6455-6464. https://dx.doi.org/10.1021/acs.est.2c07797
In: Environmental Science and Technology. American Chemical Society: Easton. ISSN 0013-936X; e-ISSN 1520-5851
Peer reviewed article  
Available in  Authors 
Keyword
    Marine/Coastal
Author keywords
    offshore wind farms, marine ecosystems, characterization factors, species richness, species abundance, seabed occupation, artificial reef, trawling avoidance
Authors  Top 
  • Li, C.
  • Coolen, J.W.P.
  • Scherer, L.
  • Mogollón, J.M.
  • Braeckman, U., more
  • Vanaverbeke, J., more
  • Tukker, A.
  • Steubing, B.
Abstract
    Large-scale offshore wind energy developments represent a major player in the energy transition but are likely to have (negative or positive) impacts on marine biodiversity. Wind turbine foundations and sour protection often replace soft sediment with hard substrates, creating artificial reefs for sessile dwellers. Offshore wind farm (OWF) furthermore leads to a decrease in (and even a cessation of) bottom trawling, as this activity is prohibited in many OWFs. The long-term cumulative impacts of these changes on marine biodiversity remain largely unknown. This study integrates such impacts into characterization factors for life cycle assessment based on the North Sea and illustrates its application. Our results suggest that there are no net adverse impacts during OWF operation on benthic communities inhabiting the original sand bottom within OWFs. Artificial reefs could lead to a doubling of species richness and a two-order-of-magnitude increase of species abundance. Seabed occupation will also incur in minor biodiversity losses in the soft sediment. Our results were not conclusive concerning the trawling avoidance benefits. The developed characterization factors quantifying biodiversity-related impacts from OWF operation provide a stepping stone toward a better representation of biodiversity in life cycle assessment.
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