Detection and modeling of bat species occupancy at multiple scales across a forested landscape in southeastern Missouri

Yates, Mark D.

doi:10.32469/10355/5883

Cited by 2 publications

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“…Studying bats with acoustic devices is less labor intensive than capturing animals, can effectively sample bats that fly above the height of most nets (>7.8 m; [87,88]), detect individuals that learn to avoid nets [89][90][91], and sample more efficiently (e.g., more locations can be sampled than with capture techniques). However, habitat structure [92], temperature, and humidity [93] can affect how sound moves in the environment, which influences detectability of the bat call [88], and acoustics cannot determine individual information (i.e., sex, age group, reproductive condition, species for locations like the southwest United States) or abundance.…”

Section: Plos Onementioning

confidence: 99%

Water and elevation are more important than burn severity in predicting bat activity at multiple scales in a post-wildfire landscape

2020

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Bats are among the most widespread mammals on Earth, and are subject to habitat change, loss, and other disturbances such as fire. Wildfire causes rapid changes in vegetation that affect habitat use. However, the spatial scale at which these changes affect bats depends on their use of habitat elements. Three years post wildfire, we assessed how burn severity, water, landform type, elevation, vegetation type, and roads affected use by bats of a forest landscape at multiple spatial scales. We deployed acoustic detectors at randomly selected locations within a 217,712 ha wildfire boundary in Arizona. We classified echolocation calls to species or group and calculated an activity index by adjusting the calls per hour. We conducted a multi-scale analysis of landscape structure and composition around each location from a 90 to 5760 m radius. No scale was selected preferentially by any species or group. Stream density and elevation range were more important predictors for species groups than burn severity. When burn severity was a predictor, agile species had higher activity in areas that were unburned or had low severity burn. A heterogeneous landscape composed of high, medium, and low burn severity patches within a forest altered by large wildfires provided habitat for different bat species, but water density and range in elevation were more important for predicting bat habitat use than fire severity in this arid landscape. More than one spatial scale, representing local to landscape levels, should be considered in managing habitat for bats. In arid areas, such as the western United States, maintaining reliable water sources is important for bats. Managing these factors at multiple spatial scales will benefit bat species with different wing morphologies, echolocation call types, and habitat selections.

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Section: Plos Onementioning

confidence: 99%

Water and elevation are more important than burn severity in predicting bat activity at multiple scales in a post-wildfire landscape

2020

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“…Southeastern myotis have a characteristic call frequency around 44 kHz (Cochran ), similar to other species in the genus. Call similarity among Myotis species makes it difficult to reliably determine species in the genus when multiple species are sympatric (Yates ); however, M. austroriparius is the only species of the genus to occur in East Texas (Cochran ).…”

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confidence: 99%

Comparison of systematic roost searches and acoustic detection to determine occupancy of rare forest bats

et al. 2013

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Despite recent increases in conservation interest, the distribution, habitat needs, and conservation priorities remain poorly understood for many animal species, including forest bats. In some cases, little quantitative information exists about appropriate survey methods to determine occupancy or abundance of bats in forest systems. We quantitatively compared detection probabilities between 2 commonly used survey techniques for 2 bat species that are closely associated with bottomland hardwood stands in the southeastern United States. Passive acoustic surveys of echolocation calls were more likely than systematic roost searches to detect both Rafinesque's big‐eared bats (Corynorhinus rafinesquii) and southeastern myotis (Myotis austroriparius) at 7 study areas in eastern Texas. Our results confirmed that numerous repeat visits (>15 acoustic‐survey‐nights) are necessary to have high confidence in detecting Rafinesque's big‐eared bats; however, southeastern myotis were easier to detect. Our results emphasize the importance of quantitatively assessing survey methods prior to designing or implementing widespread survey programs for bats. © 2013 The Wildlife Society

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Detection and modeling of bat species occupancy at multiple scales across a forested landscape in southeastern Missouri

Cited by 2 publications

References 0 publications

Water and elevation are more important than burn severity in predicting bat activity at multiple scales in a post-wildfire landscape

Water and elevation are more important than burn severity in predicting bat activity at multiple scales in a post-wildfire landscape

Comparison of systematic roost searches and acoustic detection to determine occupancy of rare forest bats

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