offshore wind farms and the environment
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Offshore Wind Farms and the Environment. Ib Krag Petersen, Jakob Tougaard and Jens Kjerulf Petersen Danish National Environmental Research Institute, Kalø. Which are the environmental issues?. Marine invertebrates Fish Birds Marine Mammals. Marine Invertebrates. - PowerPoint PPT PresentationTRANSCRIPT
National Environmental Research Institute, Denmark
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Offshore Wind Farms and the Environment
Ib Krag Petersen, Jakob Tougaard and Jens Kjerulf PetersenDanish National Environmental Research Institute, Kalø
National Environmental Research Institute, Denmark
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Which are the environmental issues?
• Marine invertebrates• Fish• Birds• Marine Mammals
National Environmental Research Institute, Denmark
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Marine Invertebrates
• Introduction of novel habitat• Potentially increased biodiversity• Potentially increased invertebrate biomass• Potentially introduction of invasive species
National Environmental Research Institute, Denmark
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Fish
• Potentially increased fish stock due to novel habitat
• Potentially incresed fish stock due to reduced commercial fishery
• Potential creation of barriers from magnetic fields along power cables
National Environmental Research Institute, Denmark
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Birds
• Potential collision risk• Direct loss of habitat• Indirect loss of habitat
National Environmental Research Institute, Denmark
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Pre- and Post-construction Encounter Rates
Red-throated / Black-throated DiverLong-tailed Duck
National Environmental Research Institute, Denmark
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Effekt of Nysted Offshore Wind Farm on Harbour Porpoises
Reduced numbers both during construction and post-construction.Effect inside WindFarm 6 times higher than in reference area.
Effect seen after one year of operation.Effect less at Horns Rev.
Carstensen et al (2006)
Percent of day with porpoise sounds
National Environmental Research Institute, Denmark
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Which are the challenges we face in order to secure sustainable development of offshore wind farms?
• gain experience from a variety of wind farms• national and international strategic planning,
including spatial planning• tackle the issue of cumulative effects• produce knowledge on habituation• increase knowledge on interactions between
trophic levels• weighing local effects on nature against
benefits to saving the planet
National Environmental Research Institute, Denmark
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Thanks for your attention