Habitat Preference of Bats in Two Temperate Forests in the North of Belgium PDF Download
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Author: Freija Michiels
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: Freija Michiels
Publisher:
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Category :
Languages : en
Pages :
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Author: Ecological Society of America
Publisher:
ISBN:
Category :
Languages : en
Pages : 78
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Author: Frank Richard Thompson
Publisher:
ISBN:
Category : Bats
Languages : en
Pages : 92
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Author: Ellen M. Whittle
Publisher:
ISBN:
Category : Bats
Languages : en
Pages : 0
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Delineating habitat preferences, especially those of imperiled species, is critical to ensure that species have access to resources needed to persist. In addition to overall preferences, establishing the phenology of sensitive periods such as reproduction can be challenging for small, cryptic species such as bats. We conducted an empirical study in northeast Wyoming, USA, to characterize the habitat selection of northern long-eared bats (Myotis septentrionalis). Objectives in Chapter 1 were to (1) characterize the maternity roost-site preferences of endangered northern long-eared bats in a peripheral population occurring within a forest managed for timber harvest, and (2) determine whether roost-site preferences and switching were modulated by weather conditions. Chapter 2 objectives were (1) to assess whether maternity roost trees of northern long-eared bats are used for multiple years in northeast Wyoming; (2) to determine whether intra-seasonal occupation of maternity roosts in northeast Wyoming matches the timing of seasonal protections for northern long-eared bats; and (3) to assess the efficacy of motion-triggered game cameras for determining occupancy of maternity roosts. In our first chapter, we found that bats were more likely to select quaking aspens, snags, and trees relatively large in diameter; however, these preferences were modulated by daily weather conditions and reproductive state. Bats roosted more often in pine at warm temperatures and while lactating, and in snags when solar radiation was high and precipitation low. Bats preferred forest patches with higher canopy cover and a larger proportion of snags. In our second chapter, we documented colony occupation at maternity roosts across multiple years and outside of the protected season of June—July. We also recorded rarely documented behaviors, including pup carrying, with motion-triggered game cameras. Our findings provide guidance on habitat types that would be beneficial to conserve for northern long-eared bat populations, and more broadly, that context-dependence is an important consideration for habitat-selection studies. Peripheral populations may be critical for future recovery of declining species; however, seasonal protections against habitat disturbance may be mismatched with the phenology of populations at range edges.
Author: P. R. Lintott
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: Laurent Tillon
Publisher:
ISBN:
Category : Science
Languages : en
Pages :
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Forests offer important refuge to bats by providing attractive roosting and foraging habitats. Their conservation is a major responsibility of forest managers. The use of tree cavities by bats in forests depends on the specific demands of each species, with a large range of different types of microhabitats utilised, from degraded cavities such as peeling bark to healthy hollows in live trees ensuring the temporal stability of the habitat. The conservation of tree-dwelling bats should not be dissociated from their fission-fusion behaviour which involves the use of many different roosts. Conservation measures must therefore take into account forest habitats suitable for feeding and in particular, forest parameters such as structure, composition, vegetation and foliage, among other elements such as deadwood, all upon which the forest manager can intervene. Acting in favour of bats requires close consideration of their complex individual responses concerning roost selection and foraging habitat selection, which is largely dictated by the reproductive status of individuals. Thereafter it is possible to evaluate the impact of wood harvesting on bats and to infer silvicultural conservation measures. The implementation of recommendations must then subsequently be based on a strong involvement on the part of the forest manager.
Author: Debra A. Scott
Publisher:
ISBN:
Category : Bats
Languages : en
Pages : 196
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Abstract: Urban expansion fragments natural habitats, which can increase susceptibility of wildlife to invasive species, predation, disease, and pollution. However, these habitat fragments may benefit some wildlife species. Recently, many organizations have made efforts to maintain and restore (e.g. through prescribed burning, invasive/exotic species removal, snag recruitment, drain tile disablement, and deer population control) natural areas in metropolitan areas, which led to changes in forest structure, such as reduced tree and shrub densities and decreased canopy cover. Habitat restoration may affect how species, such as bats, use forest fragments in urban environments. Bats are highly vague and are able to exploit habitat patches, particularly woodlands, in urban landscapes. In North America, bats use forests for foraging, roosting, and/or rearing young. Previous studies have shown a positive relationship between bat activity and woodlands in urban environments, and have suggested the importance of microhabitat to bat activity. I determined relationships between (1) restoration efforts and general bat activity, (2) general bat activity and microhabitat charactersitics (3) interspecific variation with woodland variables, and (4) roost selection of northern myotis (Myotis septentrionalis) and red bats (Lasiurus borealis) in woodland fragments. During the summers of 2004 and 2005, I used ultrasonic detectors to monitor both general and species-specific bat activity in 9 forest preserves that are in various stages of restoration. I identified 5,074 of 7,652 collected bat passes to species during 5,760 detector hours. Restoration variables and general bat activity were compared using linear regression and Akaike's Information Criterion (AIC) for model selection. Prescribed burning and invasive species removal were positively related to general bat activity. Relationships between general bat activity and vegetation variables were determined using mixed-effects linear regression models. Model fit was compared using AIC. General bat activity was positively related to small tree density (7.7-20 cm DBH) and inversely related to shrub density and clutter at 0-6 m heights. I used partial canonical correspondence analysis with site and year as covariables to determine relationships between vegetation variables and bat species. Red bats were associated with small and medium tree densities and inversely related to clutter at 0-9 m. Myotis spp. were positively associated with canopy cover, clutter at 6-9 m, and small and medium tree densities. Silver-haired bat (Lasionycteris noctivagans) activity was associated with more open forests. Big brown bats (Eptesicusfuscus) were not strongly associated with any measured vegetation variable. In 2005, I radio-tracked 5 northern myotis and 6 red bats to determine roost, plot, and stand characteristics that may clarify roost selection in urban environments. Northern myotis' roosts were positively associated with snags that had exfoliating bark and were located in unrestored woodlands. Red bat roosts were primarily located in unrestored woodlands and in residential lawns. These results suggest bats may respond to some forms of woodland restoration in urban landscapes. Sites that had repeated measures of restoration had greater overall bat acitivity. However, species-specific responses to vegetation and to roost selection differed and should be taken into consideration when developing management plans.
Author: Christian C. Voigt
Publisher: Springer
ISBN: 3319252208
Category : Nature
Languages : en
Pages : 601
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Book Description
This book focuses on central themes related to the conservation of bats. It details their response to land-use change and management practices, intensified urbanization and roost disturbance and loss. Increasing interactions between humans and bats as a result of hunting, disease relationships, occupation of human dwellings, and conflict over fruit crops are explored in depth. Finally, contributors highlight the roles that taxonomy, conservation networks and conservation psychology have to play in conserving this imperilled but vital taxon. With over 1300 species, bats are the second largest order of mammals, yet as the Anthropocene dawns, bat populations around the world are in decline. Greater understanding of the anthropogenic drivers of this decline and exploration of possible mitigation measures are urgently needed if we are to retain global bat diversity in the coming decades. This book brings together teams of international experts to provide a global review of current understanding and recommend directions for future research and mitigation.
Author: Christian Dietz
Publisher: Bloomsbury Publishing
ISBN: 1472935772
Category : Nature
Languages : en
Pages : 568
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Book Description
The definitive guide to the bats of Britain and Europe. This concise and definitive guide presents all 45 bat species that regularly occur in Europe (of which 17 are known to breed in the British Isles). The extensive introduction details the remarkable biology of bats and explores the latest findings in bat evolution, behaviour and echolocation. This is followed by in-depth species accounts covering life history, conservation status and identification of families and genera, including echolocation characteristics, and complemented by accurate distribution maps, with the book illustrated throughout with almost 700 superb colour photographs. Suitable for beginners, students, professionals or conservationists alike, Bats of Britain and Europe is the authoritative field guide for bat watchers – an essential reference for every bat enthusiast.
Author: Michael J. Lacki
Publisher: JHU Press
ISBN: 0801884993
Category : Nature
Languages : en
Pages : 350
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Book Description
Although bats are often thought of as cave dwellers, many species depend on forests for all or part of the year. Of the 45 species of bats in North America, more than half depend on forests, using the bark of trees, tree cavities, or canopy foliage as roosting sites. Over the past two decades it has become increasingly clear that bat conservation and management are strongly linked to the health of forests within their range. Initially driven by concern for endangered species—the Indiana bat, for example—forest ecologists, timber managers, government agencies, and conservation organizations have been altering management plans and silvicultural practices to better accommodate bat species. Bats in Forests presents the work of a variety of experts who address many aspects of the ecology and conservation of bats. The chapter authors describe bat behavior, including the selection of roosts, foraging patterns, and seasonal migration as they relate to forests. They also discuss forest management and its influence on bat habitat. Both public lands and privately owned forests are considered, as well as techniques for monitoring bat populations and activity. The important role bats play in the ecology of forests—from control of insects to nutrient recycling—is revealed by a number of authors. Bat ecologists, bat conservationists, forest ecologists, and forest managers will find in this book an indispensable synthesis of the topics that concern them.
