Effects of wind farms on Montagu's harrier (Circus pygargus) in southern Spain. (November 2015)

• Record Type: Journal Article
• Authors: Hernández-Pliego, Jesús; de Lucas, Manuela; Muñoz, Antonio-Román; Ferrer, Miguel
• Is Part Of: Biological conservation. Volume 191(2015)
• Page Start: 452
• Page End: 458
• Publication Date: 2015-11
• Subjects: BA design -- Bird collision -- Disturbances -- Nesting habitat -- Tarifa; Conservation of natural resources -- Periodicals; Nature conservation -- Periodicals; Ecology -- Periodicals; Environment -- Periodicals; Environmental Pollution -- Periodicals; Electronic journals; 333.9516
• DOI: 10.1016/j.biocon.2015.07.040
• Languages: English
• ISSNs: 0006-3207

Abstract

Abstract: To study the potential impact of wind turbines and associated structures on Montagu's harriers Circus pygargus, we located 111 nests over five years (18–28 nests per year) and compared their distances to several features (natural and anthropogenic) between wind farm pre- and post-construction periods using a before–after (BA) study design. We analysed abundance and density of nests and colonies through the study period. We also fitted a predictive model of nest occurrence using distance-to-feature variables and habitat as predictors. Lastly, Montagu's harrier fatalities from collision with wind turbines were estimated. No differences were detected between pre- and post-construction periods in nest or colony abundances. We found that harriers nested closer to the locations of wind turbines and power lines after wind farm construction, although distance to closest track did not change. We detected a higher spatial aggregation of Montagu's harrier nests after wind farms were installed, when the distribution of nests was mostly explained by habitat and distance to the closest track. Distance to wind turbine was apparently not influential. Fatality through collision was relatively uncommon during the study period. Our findings demonstrate that the construction, operation and maintenance of wind farms did not seem to adversely affect Montagu's harrier nesting decisions in our study area. However, we encourage further studies including reproductive parameters and foraging strategies of Montagu's harrier to provide a complete investigation of potential impacts of wind farms on this species. Highlights: Displacement and mortality on Montagu's harrier in wind farms had been analysed. Nest and colony abundances did not change after wind farm construction. Decreased distance to the closest conspecific nest after wind farms was installed. A GLM suggested habitat and distance to closest track explained nest occurrence. Mortality rate was low for Montagu's harrier in the study area.