Vis enkel innførsel

dc.contributor.authorMay, Roelof Frans
dc.contributor.authorÅström, Jens
dc.contributor.authorHamre, Øyvind
dc.contributor.authorDahl, Espen Lie
dc.description.abstractConcerns for bird collisions with wind turbines affect the deployment of onshore and offshore windpower plants. To avoid delays in consenting processes and to streamline the construction and operation phase, functional mitigation measures are required which efficiently reduces bird mortality. Vision is the primary sensory system in birds, which for a number of species also includes the ultraviolet spectrum. Many bird species that are known to collide with offshore wind turbines are sensitive in the violet or ultraviolet spectrum. For species that are mainly active at lower ambient light levels, lighting may deter birds from the lit area. Utilizing (ultra)violet lights may in addition not disturb humans. However, we do not know whether UV-sensitive birds in flight actually respond behaviourally to UV lights. Methods: We therefore tested the efficacy of two types of lights within the violet (400 nm) and ultraviolet (365 nm) spectrum to deter birds from the lit area. These lights were placed vertically and monitored continuously between dusk and dawn using an avian radar system. Results: Relative to control nights, bird flight activity (abundance) was 27% lower when the ultraviolet light was on. Violet light resulted in a 12% decrease in overall abundance, and in addition, a vertical displacement was seen, increasing the average flight altitude by 7 m. Although temporal changes occurred, this effect persisted over the season below 40 m above sea level. Conclusions: Although the results from this pilot study are promising, we argue there still is a long way to go before a potentially functional design to mitigate collisions that has proven to be effective in situ may be in place. Avian radar, Displacement, Habituation, Mitigation, Seabirds, Ultraviolet, Wind turbinenb_NO
dc.rightsNavngivelse 4.0 Internasjonal*
dc.subjectAvian radarnb_NO
dc.subjectWind turbinenb_NO
dc.titleDo birds in flight respond to (ultra)violet lighting?nb_NO
dc.typeJournal articlenb_NO
dc.typePeer reviewednb_NO
dc.subject.nsiVDP::Zoologiske og botaniske fag: 480nb_NO
dc.subject.nsiVDP::Zoology and botany: 480nb_NO
dc.source.journalAvian Researchnb_NO
dc.relation.projectAndre: Energy Norwaynb_NO
dc.relation.projectAndre: Statoilnb_NO
dc.relation.projectAndre: TrønderEnergi Kraftnb_NO
dc.relation.projectAndre: Statkraftnb_NO
dc.relation.projectNorges forskningsråd: 226241nb_NO
dc.relation.projectAndre: Vattenfallnb_NO
dc.relation.projectAndre: Norwegigan Water Resources and Energy Directoratenb_NO
dc.relation.projectEgen institusjon: Norwegian Institute for Nature Research (NINA)nb_NO
cristin.unitnameAvdeling for terrestrisk økologi

Tilhørende fil(er)


Denne innførselen finnes i følgende samling(er)

Vis enkel innførsel

Navngivelse 4.0 Internasjonal
Med mindre annet er angitt, så er denne innførselen lisensiert som Navngivelse 4.0 Internasjonal