A stochastic simulation model for assessing the masking effects of road noise for wildlife, outdoor recreation, and bioacoustic monitoring

Toth, Cory A.; Pauli, Benjamin P.; McClure, Christopher J. W.; Francis, Clinton D.; Newman, Peter; Barber, Jesse R.; Fristrup, Kurt M.

doi:10.1007/s00442-022-05171-2

Cited by 4 publications

(3 citation statements)

References 73 publications

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“…Contrary to expectation (Table S1a), however, detections of the Ryukyu scops owl (Otus elegans) were also unaffected. Given that acoustic surveys cannot differentiate between cases where a species is not producing sound and those where that species is not present (Toth et al, 2022), we cannot say with certainty that H. diphone populations declined following the typhoons. Regardless, our detected post-typhoon declines in H. diphone vocalizations-either through behavioral changes, distributional shifts, or local mortalitywere consistent across >80% of the field sites in which this species was detected.…”

Section: Discussionmentioning

confidence: 98%

Divergent ecological responses to typhoon disturbance revealed via landscape‐scale acoustic monitoring

Ross,

Friedman,

Dudley

et al. 2023

Global Change Biology

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Climate change is increasing the frequency, intensity, and duration of extreme weather events across the globe. Understanding the capacity for ecological communities to withstand and recover from such events is critical. Typhoons are extreme weather events that are expected to broadly homogenize ecological dynamics through structural damage to vegetation and longer‐term effects of salinization. Given their unpredictable nature, monitoring ecological responses to typhoons is challenging, particularly for mobile animals such as birds. Here, we report spatially variable ecological responses to typhoons across terrestrial landscapes. Using a high temporal resolution passive acoustic monitoring network across 24 sites on the subtropical island of Okinawa, Japan, we found that typhoons elicit divergent ecological responses among Okinawa's diverse terrestrial habitats, as indicated by increased spatial variability of biological sound production (biophony) and individual species detections. This suggests that soniferous communities are capable of a diversity of different responses to typhoons. That is, spatial insurance effects among local ecological communities provide resilience to typhoons at the landscape scale. Even though site‐level typhoon impacts on soundscapes and bird detections were not particularly strong, monitoring at scale with high temporal resolution across a broad spatial extent nevertheless enabled detection of spatial heterogeneity in typhoon responses. Further, species‐level responses mirrored those of acoustic indices, underscoring the utility of such indices for revealing insight into fundamental questions concerning disturbance and stability. Our findings demonstrate the significant potential of landscape‐scale acoustic sensor networks to capture the understudied ecological impacts of unpredictable extreme weather events.

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Section: Discussionmentioning

confidence: 98%

Divergent ecological responses to typhoon disturbance revealed via landscape‐scale acoustic monitoring

Ross,

Friedman,

Dudley

et al. 2023

Global Change Biology

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show abstract

“…Automated vocalisation detections of the Japanese bush warbler ( Horornis diphone ) declined after the typhoons, while those of the large-billed crow ( Corvus macrorhynchos ) and Ryukyu scops owl ( Otus elegans ) did not. Given that acoustic surveys cannot differentiate between cases where a species is not producing sound and those where that species is not present (Toth et al, 2022), we cannot say with certainty that H. diphone populations declined following the typhoons. Regardless, our detected post-typhoon declines in H. diphone vocalisations—either through behavioural changes, distributional shifts, or local mortality—were consistent across >80% of the field sites in which this species was detected.…”

Section: Discussionmentioning

confidence: 99%

Divergent ecological responses to typhoon disturbance revealed via landscape-scale acoustic monitoring

Ross

Friedman

Armitage

et al. 2023

Preprint

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Climate change is increasing the frequency, intensity, and duration of extreme weather events across the globe. Understanding the capacity for ecological communities to withstand and recover from such events is critical. Typhoons are extreme weather events that are expected to broadly homogenise ecosystems through structural damage to vegetation and longer-term effects of salinization. Given their unpredictable nature, monitoring ecological responses to typhoons is challenging, particularly for mobile animals such as birds. Here, we report spatially variable ecological responses to typhoons across terrestrial landscapes. Using a high temporal resolution passive acoustic monitoring network across 24 sites on the subtropical island of Okinawa, Japan, we found that typhoons elicit divergent ecological responses among Okinawa's pristine forests, as indicated by increased spatial variability of biological sound production (biophony) among forested sites. However, no such post-typhoon shift in variability was observed among developed urban or agricultural sites. This indicates that natural forests have a diversity of pathways through which communities can respond to typhoons, whereas land use development produces communities more constrained in their disturbance responses. That is, spatial insurance effects among forest communities may provide resilience to typhoons at the landscape scale, but this spatial insurance was diminished by habitat degradation through land use development. Though site-level typhoon impacts on soundscapes and bird detections were not particularly strong, we nevertheless revealed spatial heterogeneity in typhoon responses, owing to the data resolution afforded to us by monitoring at scale (high temporal resolution, broad spatial extent). Our findings underscore the importance of natural forests in insuring ecosystems against disturbance, and demonstrate the potential of landscape-scale acoustic sensor networks for documenting the understudied ecological impacts of unpredictable extreme weather events.

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“…Identifying speciesspecific vocalisations from acoustic recordings provides evidence for species presence at a given time and location, but determining true absences is more challenging. A species might not be vocalising because it is not present, its vocalisation was masked (Box 1), or it was simply too quiet to be detected (Toth et al, 2022). Detectability of certain species also changes with seasonal and environmental factors (Medina & Francis, 2012).…”

Section: Temporal Resolution and Scalementioning

confidence: 99%

Passive acoustic monitoring provides a fresh perspective on fundamental ecological questions

et al. 2023

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1. Passive acoustic monitoring (PAM) has emerged as a transformative tool for applied ecology, conservation and biodiversity monitoring, but its potential contribution to fundamental ecology is less often discussed, and fundamental PAM studies tend to be descriptive, rather than mechanistic.2. Here, we chart the most promising directions for ecologists wishing to use the suite of currently available acoustic methods to address long-standing fundamental questions in ecology and explore new avenues of research. In both terrestrial and aquatic habitats, PAM provides an opportunity to ask questions across multiple spatial scales and at fine temporal resolution, and to capture phenomena or species that are difficult to observe. In combination with traditional approaches to data collection, PAM could release ecologists from myriad limitations that have, at times, precluded mechanistic understanding.3. We discuss several case studies to demonstrate the potential contribution of PAM to biodiversity estimation, population trend analysis, assessing climate change impacts on phenology and distribution, and understanding disturbance and recovery dynamics. We also highlight what is on the horizon for PAM, in terms of near-future technological and methodological developments that have the potential to provide advances in coming years.4. Overall, we illustrate how ecologists can harness the power of PAM to address fundamental ecological questions in an era of ecology no longer characterised by data limitation.Recent developments in data acquisition, storage and processing have led to Passive acoustic monitoring (PAM; Box 1) approaches being increasingly adopted for a wide array of ecological applications and conservation management (

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A stochastic simulation model for assessing the masking effects of road noise for wildlife, outdoor recreation, and bioacoustic monitoring

Cited by 4 publications

References 73 publications

Divergent ecological responses to typhoon disturbance revealed via landscape‐scale acoustic monitoring

Divergent ecological responses to typhoon disturbance revealed via landscape‐scale acoustic monitoring

Divergent ecological responses to typhoon disturbance revealed via landscape-scale acoustic monitoring

Passive acoustic monitoring provides a fresh perspective on fundamental ecological questions

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