Short-Term Effects of Small-Scale Habitat Disturbance on Activity by Insectivorous Bats

Grindal, Scott D.; Brigham, R. Mark

doi:10.2307/3802552

Cited by 89 publications

(59 citation statements)

References 6 publications

(13 reference statements)

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“…The diVerence in bat activity between harvested and uncut forest was most clearly seen in active acoustic surveys of large-bodied (open adapted) species, with larger numbers of bats recorded per unit time in the harvested sites and with the numbers increasing with cutting intensity (Table 3a). These results support the suggestion that the opening of the forest canopy creates additional uncluttered foraging habitat (Grindal and Brigham 1998;Owen et al 2004;Menzel et al 2005b). The eVect was less apparent for clutter-adapted Myotis species.…”

Section: Harvested and Uncut Forestssupporting

confidence: 88%

Habitat-associated and temporal patterns of bat activity in a diverse forest landscape of southern New England, USA

Brooks

2008

Biodivers Conserv

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The development and use of acoustic recording technology, surveys have revealed the composition, relative levels of activity, and preliminary habitat use of bat communities of various forest locations. However, detailed examinations of acoustic surveys results to investigate temporal patterns of bat activity are rare. Initial active acoustic surveys of bat activity on the Quabbin Reservoir watershed in central Massachusetts recorded high numbers of call sequences by Wve bat species. The results showed the importance of aquatic and open habitats for bats in this diverse forest landscape. Because the preliminary surveys were restricted in extent (habitats), number (replicates), and duration (active surveys only, limited number of repeated surveys), the authors strongly recommended more comprehensive and extensive surveys of bat activity on the area. This paper reports the results of active (manual) and passive (automated) acoustic bat activity surveys in three replicates of ten habitats, conducted three to four times per year over the course of the study between 2004 and 2006. Over the full study, 2,800 actively-recorded 37,632 passivelyrecorded call sequences were examined and identiWed to species when possible. General patterns in activity did not diVer by habitat between the two survey methods. Call sequences were recorded more often in open, especially aquatic habitats than in cluttered habitats. The use of passive surveys allowed for the assessment of temporal patterns of activity and an analysis of the relationship between ambient temperature and activity.

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Section: Harvested and Uncut Forestssupporting

confidence: 88%

Habitat-associated and temporal patterns of bat activity in a diverse forest landscape of southern New England, USA

Brooks

2008

Biodivers Conserv

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“…Grindal and Brigham (1998) reported higher bat activity in small forest openings. These clearings may be favorable for some insect prey and are most certainly conducive to the foraging strategies of some species of bats.…”

Section: Discussionmentioning

confidence: 99%

Bat Mortality at a Wind Power Facility in Central Canada

Jameson¹,

Willis²

2012

Northwestern Naturalist

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where he is studied habitat selection of bats in managed forests of the Cascade Range in western Oregon. He has been involved with cooperative management and research on bats and their habitats for the past 10 years, including the development and initiation of the Northwest Bat Cooperative. He holds an A.A.S. in natural resources management, a B.S. in fish and wildlife management, and an M.S. in zoology and physiology. Prior to returning to graduate school for his Doctorate degree, Ed was a wildlife research biologist with Weyerhaeuser Company and a wildlife biologist with the U.S. Fish and Wildlife Service and U.S. Forest Service in Oregon.Wallace P. Erickson is a statistician and project manager with Western Ecosystems Technology and a Ph.D. candidate in the Department of Statistics at the University of Wyoming. He has a B.S. in Statistics from Winona State University, and a M.S. in Statistics from teh University of Wyoming. He has over 14 years of work experience related to the design and analysis of environmental and wildlife studies working for Western EcoSystems Technology and has been involved with studies of the impacts of wind plants on wildlife in numerous states since 1994. Wally holds a B.S. in mathematics and an M.S. in statistics.Jason Horn is a Ph.D. candidate in the Biology Department at Boston University and an ecological consultant, focusing on organismal and behavioral biology. His dissertation research focuses on several aspects of bat ecology including social and foraging behavior, nightly activity patterns, and population dynamics. In particular, he has developed analytical methods for describing patterns of flight behavior and dispersal using emerging technologies such as infrared thermography, passive transponders, and large-scale RADAR imagery. Recently, he has applied these methods to studying flight patterns and interaction between bats and wind turbines. His research has been supported by the National Science Foundation, The American Society of Mammalogists, The American Museum of Natural History and Bat Conservation International. Jason holds a B.A. in biology from Cornell and M.A. in biology from Boston University. Jessica Kerns Patterns of Bat FatalityA total of 398 and 262 bat fatalities were found during searches at Mountaineer and Meyersdale, respectively, during the 6-week study period. Six species were killed at Mountaineer and 7 at Meyersdale: hoary bats, eastern red bats, eastern pipistrelles, little brown bats, silver-haired bats, big brown bats, and northern long-eared bats (only found at Meyersdale)were discovered(from highest to lowest number found). More adult male bats were found than juvenile males, adult females, or juvenile female bats.Bat fatalities were highly variable and periodic throughout the study. Fatalities were distributed across all turbines, although higher than average numbers of bats generally were found at turbines located near an end or center of the string at both sites. Of the 64 turbines studied, one (turbine 11 at Mountaineer) was non-operationa...

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“…Bats are highly mobile animals covering several kilometres in a single night. They follow flight paths along landscape features, such as hedgerows and edge habitats (Racey & Swift 1985;Walsh & Harris 1996a,b;Verboom & Huitema 1997;Grindal & Brigham 1998;Verboom & Spoelstra 1999). A large number of farm pairs was studied, sampling each farm once.…”

Section:  mentioning

confidence: 99%

Bat activity and species richness on organic and conventional farms: impact of agricultural intensification

Wickramasinghe

Harris

Jones

et al. 2003

Journal of Applied Ecology

261

182

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Summary 1.Agricultural intensification is perceived to be a major cause of the decline in many European bat populations. Because organic farming prohibits the use of agrochemicals, we compared organic vs. conventional farm types to test the hypothesis that agricultural intensification based on high levels of agrochemical use has been a factor in bat population declines. Bat activity and species richness were compared on matched pairs of organic and conventional farms. 2. Bat activity was quantified using acoustic surveys within specific habitats on farms in southern England and Wales. Eighty-nine per cent of bat passes were identified to species level using artificial neural networks (ANN). A further 9% were identified to genus. 3. Total bat activity was significantly higher on organic farms than on conventional farms. Significantly more bat passes were recorded over water on organic farms than on conventional farms. Foraging activity (quantified in two ways: total feedings buzzes and feeding buzzes per pass) was significantly higher on organic farms than on conventional farms. 4. The dominant species on both farm types were Pipistrellus pipistrellus and Pipistrellus pygmaeus . Significantly more passes of Myotis species were recorded on organic farms than on conventional farms. This difference was also significant when water habitats were considered alone. 5. The activity of both Myotis daubentonii and Myotis brandtii was significantly higher on organic farms than on conventional farms. The activity of Myotis bechsteinii and Myotis brandtii was significantly higher over organic water habitats than over conventional water habitats. Rhinolophus hipposideros and Rhinolophus ferrumequinum were only recorded on organic farms in wooded, arable and pasture habitats. 6. Synthesis and applications. This study highlights the position of bats as bioindicators and victims of agricultural change. The differences in bat activity between farm types may reflect features such as taller hedgerows and better water quality on organic farms. Higher foraging activity also suggests that habitat quality in terms of prey availability is greater on organic farms. Less intensive farming benefits bats, and as the number of organic enterprises increases it may help to reverse declines in bat populations.

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Short-Term Effects of Small-Scale Habitat Disturbance on Activity by Insectivorous Bats

Cited by 89 publications

References 6 publications

Habitat-associated and temporal patterns of bat activity in a diverse forest landscape of southern New England, USA

Habitat-associated and temporal patterns of bat activity in a diverse forest landscape of southern New England, USA

Bat Mortality at a Wind Power Facility in Central Canada

Bat activity and species richness on organic and conventional farms: impact of agricultural intensification

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