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Author: Ellen M. Whittle Publisher: ISBN: Category : Bats Languages : en Pages : 0
Book Description
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: Ellen M. Whittle Publisher: ISBN: Category : Bats Languages : en Pages : 0
Book Description
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: Jocelyn R. Karsk Publisher: ISBN: Category : Northern long-eared myotis Languages : en Pages : 0
Book Description
This study presents the findings of a habitat suitability model for the northern long-eared bat maternity roosting habitat (Myotis septentrionalis) in a three-county region in southern Indiana. The northern long-eared bat was added to the endangered species list in 2015 and understanding its' habitat selection at the landscape scale is important to aid in minimizing population declines. Female northern long-eared bats were captured and fitted with transmitters in Morgan Monroe and Yellowwood state forests during the 2012-2015 summer maternity season. These bats were tracked to day roosts where location and habitat information was recorded. We used ArcMap to plot roost tree locations and extract landscape-level environmental variables. MaxEnt was used to evaluate which environmental variables of interest were of greatest importance to northern long-eared bats in our study. Our final model included a map indicating areas most suitable to northern long-eared bats. Our model indicated that elevation, distance to roads, and distance to regeneration openings had the most influence on which habitats bats used for roosting.
Author: Susan M. Swift Publisher: A&C Black ISBN: 1408128799 Category : Nature Languages : en Pages : 201
Book Description
Long-Eared Bats examines the biology, ecology and behaviour of two European bat species - Plecotus auritus and Plecotus austriacus. This book investigates their behaviour and considers the full range of conservation issues relating to the species. Topics covered include: identifying the species, foraging, reproductive biology, social organization, and the effects of man-made alterations to the environment and proposed conservation methods.
Author: Sandra Rancourt Publisher: ISBN: Category : Bats Languages : en Pages : 110
Book Description
Bat conservation is often hindered by a lack of geographic-specific knowledge of the bat community and the characteristics of roost sites used by reproductive females. I assessed the composition of the bat community and examined the use and characteristics of roosts selected by reproductive female big brown bats (Eptesicusfuscus) and long- eared myotis (Myotis evotis) in the Channeled Scablands of northeastern Washington. This area contains a high diversity of potential roost types (snag and tree cavities and rock and human-made structures) known to be used by both species of bats. I trapped 536 bats representing 10 species during 1996-97 using mist nets and harp traps. Radio-telemetry was used to locate 38 and 35 roosts of reproductive female big brown bats and long-eared myotis, respectively. Both species switched roosts frequently. Habitat variables were measured at three levels; the roost site, a random site near the roost, and a random site at a landscape level. Ninety-five percent (n = 36) of the big brown bat roosts were in natural tree cavities. Twenty-eight roosts were in ponderosa pine (Pinus ponderosa) and eight in aspen (Populus tremuloides). Dead tops of live pine trees were used significantly more as roosts than pine snags by big brown bats. Although there were significantly more roost trees>30 cm in diameter and taller than 12m than what was available, they were not necessarily the tallest tree in the stand. A significantly greater proportion of big brown bat roosts were found in open pine, aspen and mixed-aspen pine forests and less in grasslands and closed pine than expected. Obstruction of roost trees was not different than randomly selected trees. Big brown bat roost sites were not significantly different in forest structure than random sites. All but one of the 35 long-eared myotis roost sites were found in crevices in small basalt rock formations. Long-eared myotis roosts were in open habitats close to the edge of closed forest stands. Both species selected roosts in an area with a greater proportion of aspen and open ponderosa pine habitat. Forest restoration strategies should protect both large diameter snags but also existing dead top trees and should maintain natural population levels of biological agents that create dead tops. Restoration of historic open conditions in ponderosa pine will provide improved habitat for both big brown bats and long-eared myotis. Caution must be exercised in making generalizations about roost selection of individual bat species, given regional differences found in this and other studies.
Author: Alexander Silvis Publisher: ISBN: Category : Bats Languages : en Pages : 7
Book Description
We report characteristics of seven tree cavities used as day-roosts by female northern long-eared bats (Myotis septentrionalis) during the maternity season in a deciduous forest in north-central Kentucky. Understanding the characteristics of cavities selected by bats will help us better understand the ecology of cavity roosting bats and the tree species and condition necessary for providing day-roost habitat. Cavity openings were created by either fungal decay or primary excavators. Length and volume of cavities were positively related to number of entrances. Mean area of entrances was positively related to the proportion of entrances created by primary excavators.
Author: Michael J. Lacki Publisher: JHU Press ISBN: 0801884993 Category : Nature Languages : en Pages : 350
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.
Author: Christian C. Voigt Publisher: Springer ISBN: 3319252208 Category : Nature Languages : en Pages : 601
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: Ellen M. Whittle
Author: Ellen M. Whittle
Author: Jocelyn R. Karsk
Author: Holly A. Badin
Author: Susan M. Swift
Author: Sandra Rancourt
Author: Brenna A. Hyzy
Author: Alexander Silvis
Author: Michael J. Lacki
Author: Christian C. Voigt
Author: Donald Joyce Borror