A Comparison of Passive and Active Acoustic Sampling for a Bat Community Impacted by White-Nose Syndrome

Coleman, Laci S.; Ford, W. Mark; Dobony, Christopher A.; Britzke, Eric R.

doi:10.3996/082013-jfwm-057

Cited by 23 publications

(25 citation statements)

References 22 publications

(26 reference statements)

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“…Maximizing detection rates is essential in the face of WNS-related bat declines and the increasing level of effort required to detect a present species (Coleman et al 2014). For example, we found that detection probability decreased with increasing wind speed for the eastern red bat, which is likely a function of microphone interference.…”

Section: Discussionmentioning

confidence: 73%

Effects of historic wildfire and prescribed fire on site occupancy of bats in Shenandoah National Park, Virginia, USA

et al. 2019

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Given the likelihood of regional extirpation of several once-common bat species in eastern North America from white-nose syndrome, it is critical that the impacts of forest management activities, such as prescribed fire, are known in order to minimize potentially additive negative effects on bat populations. Historic wildfires may offer a suitable surrogate to assess long-term burn impacts on bats for planning, implementing and assessing burn programs. To examine the effects of historic fire on bats, we sampled bat activities at 24 transect locations in burned and unburned forest stands in the central Appalachian Mountains of Shenandoah National Park (SNP), Virginia, USA. There was limited evidence of positive fire effects over time on hoary bats (Lasiurus cinereus Beauvois) and big brown bats (Eptesicus fuscus Beauvois) occupancy. Overall, there were few or mostly equivocal relationships of bat occupancy relative to burn conditions or time since fire in SNP across species using a false-positive occupancy approach. Our results suggest that fire does not strongly affect bat site occupancy short-or long-term in the central Appalachians.

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Section: Discussionmentioning

confidence: 73%

Effects of historic wildfire and prescribed fire on site occupancy of bats in Shenandoah National Park, Virginia, USA

et al. 2019

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“…Live traps had the greatest LTD and lowest POD compared with the other 2 techniques, highlighting the inefficiency of traditional techniques versus the effectiveness of noninvasive techniques to obtain detection or nondetection data, as has been observed with numerous other wildlife species (e.g., Hackett et al , Coleman et al , McDonald et al ). Although our study was of a shorter duration than most live‐trapping studies within the southern Appalachians, captures/trap night were similar to other regional live‐trap efforts (Hackett , Menzel et al ; C. A. Diggins, unpublished data).…”

Section: Discussionmentioning

confidence: 85%

“…We calculated 1 technician‐hour at US$15 (Coleman et al ). For both camera traps and acoustics, we did not count download time of data toward our cost or effort analysis because data downloading did not require full attention of technicians (e.g., data download may take 45 min, but configuration took the technician ≤5 min).…”

Section: Methodsmentioning

confidence: 99%

“…However, to effectively estimate occupancy, reliable techniques to detect target species are required because inefficient techniques may increase sampling error due to low probability of detection (MacKenzie et al , Pollock et al , Silveira et al , Gu and Swihart ). Various techniques can produce differing estimates of detection, that in turn may influence how a species or its associated habitat is managed (e.g., Gompper et al , Hackett et al , Vine et al , Coleman et al ). This may especially be true for rare or cryptic species, where underestimation of occupancy resulting from the use of certain sampling techniques might fail to detect a species when it is present, potentially providing false‐negative data on distribution, population status, or trends (Gu and Swihart , Thompson ).…”

mentioning

confidence: 99%

“…Researchers also have developed methods and software to identify recorded bat echolocation pulses to the species level (Parsons , Britzke et al ). The limitations and assumptions of data collected from ultrasonic acoustic surveys are well established for bat studies, which can be adapted to other species (Hayes , ; Broders ; Gannon et al ; Britzke et al ; Coleman et al ). The development of call libraries from captive and wild populations of small mammal species allows for use of this method as a small mammal monitoring technique in the field.…”

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confidence: 99%

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Comparison of survey techniques on detection of northern flying squirrels

et al. 2016

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The ability to detect a species is central to the success of monitoring for conservation and management purposes, especially if the species is rare or endangered. Traditional methods, such as live capture, can be labor-intensive, invasive, and produce low detection rates. Technological advances and new approaches provide opportunities to more effectively survey for species both in terms of accuracy and efficiency than previous methods. We conducted a pilot comparison study of a traditional technique (livetrapping) and 2 novel noninvasive techniques (camera-trapping and ultrasonic acoustic surveys) on detection rates of the federally endangered Carolina northern flying squirrel (Glaucomys sabrinus coloratus) in occupied habitat within the Roan Mountain Highlands of North Carolina, USA. In 2015, we established 3 5 Â 5 livetrapping grids (6.5 ha) with 4 camera traps and 4 acoustic detectors systematically embedded in each grid. All 3 techniques were used simultaneously during 2 4-day survey periods. We compared techniques by assessing probability of detection (POD), latency to detection (LTD; i.e., no. of survey nights until initial detection), and survey effort. Acoustics had the greatest POD (0.37 AE 0.06 SE), followed by camera traps (0.30 AE 0.06) and live traps (0.01 AE 0.005). Acoustics had a lower LTD than camera traps (P ¼ 0.017), where average LTD was 1.5 nights for acoustics and 3.25 nights for camera traps. Total field effort was greatest with live traps (111.9 hr) followed by acoustics (8.4 hr) and camera traps (9.6 hr), although processing and examination for data of noninvasive techniques made overall effort similar among the 3 methods. This pilot study demonstrated that both noninvasive methods were better rapid-assessment detection techniques for flying squirrels than live traps. However, determining seasonal effects between survey techniques and further development of protocols for both noninvasive techniques is necessary prior to widespread application in the region. Published 2016. This article is a U.S. Government work and is in the public domain in the USA.

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Sampling methodology influences habitat suitability modeling for chiropteran species

Gaulke

Hohoff

Rogness

et al. 2023

Ecology and Evolution

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Technological advances increase opportunities for novel wildlife survey methods.With increased detection methods, many organizations and agencies are creating habitat suitability models (HSMs) to identify critical habitats and prioritize conservation measures. However, multiple occurrence data types are used independently to create these HSMs with little understanding of how biases inherent to those data might impact HSM efficacy. We sought to understand how different data types can influence HSMs using three bat species (Lasiurus borealis, Lasiurus cinereus, and Perimyotis subflavus). We compared the overlap of models created from passive-only (acoustics), active-only (mist-netting and wind turbine mortalities), and combined occurrences to identify the effect of multiple data types and detection bias. For each species, the active-only models had the highest discriminatory ability to tell occurrence from background points and for two of the three species, active-only models preformed best at maximizing the discrimination between presence and absence values. By comparing the niche overlaps of HSMs between data types, we found a high amount of variation with no species having over 45% overlap between the models.Passive models showed more suitable habitat in agricultural lands, while active models showed higher suitability in forested land, reflecting sampling bias. Overall, our results emphasize the need to carefully consider the influences of detection and survey biases on modeling, especially when combining multiple data types or using single data types to inform management interventions. Biases from sampling, behavior at the time of detection, false positive rates, and species life history intertwine to create striking differences among models. The final model output should consider biases of each detection type, particularly when the goal is to inform management decisions, as one data type may support very different management strategies than another.

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A Comparison of Passive and Active Acoustic Sampling for a Bat Community Impacted by White-Nose Syndrome

Cited by 23 publications

References 22 publications

Effects of historic wildfire and prescribed fire on site occupancy of bats in Shenandoah National Park, Virginia, USA

Effects of historic wildfire and prescribed fire on site occupancy of bats in Shenandoah National Park, Virginia, USA

Comparison of survey techniques on detection of northern flying squirrels

Sampling methodology influences habitat suitability modeling for chiropteran species

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