期刊
ECOLOGY AND EVOLUTION
卷 6, 期 1, 页码 245-255出版社
WILEY
DOI: 10.1002/ece3.1847
关键词
Distance estimation; energy development; grasslands; perceptibility
资金
- Cenovus Energy
- Natural Sciences and Engineering Research Canada
- Canadian Foundation for Innovations
- Manitoba Research and Innovations Fund
- Clayton H. Riddell Endowment Fund, University of Manitoba
Probability of detection and accuracy of distance estimates in aural avian surveys may be affected by the presence of anthropogenic noise, and this may lead to inaccurate evaluations of the effects of noisy infrastructure on wildlife. We used arrays of speakers broadcasting recordings of grassland bird songs and pure tones to assess the probability of detection, and localization accuracy, by observers at sites with and without noisy oil and gas infrastructure in south-central Alberta from 2012 to 2014. Probability of detection varied with species and with speaker distance from transect line, but there were few effects of noisy infrastructure. Accuracy of distance estimates for songs and tones decreased as distance to observer increased, and distance estimation error was higher for tones at sites with infrastructure noise. Our results suggest that quiet to moderately loud anthropogenic noise may not mask detection of bird songs; however, errors in distance estimates during aural surveys may lead to inaccurate estimates of avian densities calculated using distance sampling. We recommend caution when applying distance sampling if most birds are unseen, and where ambient noise varies among treatments.
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