Action: Reduce rotor diameter
Key messagesRead our guidance on Key messages before continuing
- We found no studies that evaluated the effects of reducing rotor diameter on bat populations.
‘We found no studies’ means that we have not yet found any studies that have directly evaluated this action during our systematic journal and report searches. Therefore we have been unable to assess whether or not the action is effective or has any harmful impacts. Please get in touch if you know of such a study for this action.
Studies of patterns of bat fatalities at existing wind farms in Europe and the USA found that mortality increased with rotor diameter in some studies (Rydell et al 2010), but not in others (Barclay et al 2007, Georgiakakis et al 2012).
Barclay R.M.R., Baerwald E.F. & Gruver J.C. (2007) Variation in bat and bird fatalities at wind energy facilities: assessing the effects of rotor size and tower height. Canadian Journal of Zoology, 85, 381–387.
Georgiakakis P., Kret E., Carcamo B., Doutau B., Kafkaletou-Diez A., Vasilakis D. & Papadatou E. (2012) Bat fatalities at wind farms in north-eastern Greece. Acta Chiropterologica, 14, 459–468.
Rydell J., Bach L., Dubourg-Savage M.-J., Green M., Rodrigues L. & Hedenström A. (2010) Bat mortality at wind turbines in northwestern Europe. Acta Chiropterologica, 12, 261–274.