Overlap in Roosting Habits of Indiana Bats (Myotis sodalis) and Northern Bats (Myotis septentrionalis)

Timpone, John C.; Boyles, Justin G.; Murray, Kevin L.; Aubrey, Doug P.; Robbins, Lynn W.

doi:10.1674/0003-0031-163.1.115

Cited by 30 publications

(36 citation statements)

References 23 publications

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“…To avoid spatial autocorrelation, (with the exception of proportion of forested habitat) we only calculated landscape metrics within a 1 km radius of each map cell. We selected this radius because it represents the expected distance an individual of either species would travel from a roost to a foraging area (Carter and Feldhamer 2005;Sparks et al 2005;Broders et al 2006;Henderson and Broders 2008;Timpone et al 2010) and to match the scale of the important predictors of a related study (Weber and Sparks 2013).…”

Section: Environmental Variablesmentioning

confidence: 99%

“…1 Map of Indiana depicting study areas. Gray areas denote regions where only predictions for Indiana bat roosting occupancy were generated while black areas encompass areas with estimates of roosting occupancy for Indiana and northern long-eared bats Landscape Ecol solar exposure is known to strongly influence roost selection (Foster and Kurta 1999;Menzel et al 2002;Timpone et al 2010). Therefore, we considered the proportion of forest within a 90 m 9 90 m region and also within 1 km as potential predictors of roost selection for both species.…”

Section: Environmental Variablesmentioning

confidence: 99%

“…Proportion of forest along with a measure of forest fragmentation were chosen as they can affect roost selection (Carter et al 2002). Similarly, forest edge has been suggested as an important aspect of roost suitability (Carter and Feldhamer 2005;Broders et al 2006;Timpone et al 2010). Therefore the proportion of forest edge within 1 km and the distance to the nearest forest edge at each site were included as covariates.…”

Section: Environmental Variablesmentioning

confidence: 99%

“…Therefore the proportion of forest edge within 1 km and the distance to the nearest forest edge at each site were included as covariates. Because water is an important resource and both species are known to select roosts in bottomland forests, near streams and in areas with more water (Kurta et al 1993;Foster and Kurta 1999;Carter et al 2002;Kurta et al 2002;Carter and Feldhamer 2005;Carter 2006;Timpone et al 2010), we included length of streams within 1 km, distance to nearest water (e.g., stream, lake, pond), distance to nearest intermittent stream, and distance to nearest permanent stream as environmental covariates. Human development may be negatively associated with roosts (Carter et al 2002); therefore, the proportion of developed areas within 1 km was used as a potential predictor.…”

Section: Environmental Variablesmentioning

confidence: 99%

“…Such a relationship could be the result of the need for maternity roosts with solar exposure. Indiana bat maternity roosts likely require solar exposure for thermoregulation and fetal development and thus roosts are often found in areas with lower canopy closure or direct solar exposure (Kurta et al 1993;Callahan et al 1997;Carter and Feldhamer 2005;Timpone et al 2010). If areas with lower proportions of forested areas regionally are indicative of trees and snags with greater solar exposure, it could follow that roosting would be greater in such areas.…”

Section: Cells Indicate the Percentage Of Map Area In All Combinationsmentioning

confidence: 99%

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Landscape features associated with the roosting habitat of Indiana bats and northern long-eared bats

et al. 2015

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Context Bat conservation in the eastern United States faces threats from white nose syndrome, wind energy, and fragmentation of habitat. To mitigate population declines, the habitat requirements of species of concern must be established. Assessments that predict habitat quality based upon landscape features can aid species management over large areas. Roosts are critical habitat for many bat species including the endangered Indiana bat (Myotis sodalis) and the threatened northern long-eared bat (M. septentrionalis). Objectives While much is known about the microhabitat requirements of roosts, translating such knowledge into landscape-level management is difficult. Our goal was to determine the landscape-scale environmental variables necessary to predict roost occupancy for both species. Methods Using MaxLike, a presence-only occupancy modeling approach, with known roost sites, we identified factors associated with roosting habitat. Spatially independent roost locations were particularly limited for northern long-eared bats resulting in differences in study areas and sample sizes between the two species. Results Occupancy of Indiana bat roosts was greatest in areas with [80 % local forest cover within broader landscapes (1 km) with \40 % forest, \1 km of perennial streams but[1 km from intermittent streams and in areas with poor foraging habitat. Northern longeared roost occupancy was greatest in areas with[80 % regional but fragmented forest cover with greater forest edge approximately 4 km from the nearest major road. Conclusions Landscape features associated with roost occupancy differed greatly between species suggesting disparate roosting needs at the landscape scale, which may require independent management of roost habitat for each species.

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Section: Environmental Variablesmentioning

confidence: 99%

Section: Environmental Variablesmentioning

confidence: 99%

Section: Environmental Variablesmentioning

confidence: 99%

Section: Environmental Variablesmentioning

confidence: 99%

Section: Cells Indicate the Percentage Of Map Area In All Combinationsmentioning

confidence: 99%

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Landscape features associated with the roosting habitat of Indiana bats and northern long-eared bats

et al. 2015

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Indiana bat summer maternity distribution: effects of current and future climates

Loeb

Winters

2013

Ecology and Evolution

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Temperate zone bats may be more sensitive to climate change than other groups of mammals because many aspects of their ecology are closely linked to temperature. However, few studies have tried to predict the responses of bats to climate change. The Indiana bat (Myotis sodalis) is a federally listed endangered species that is found in the eastern United States. The northerly distribution of Indiana bat summer maternity colonies relative to their winter distributions suggests that warmer climates may result in a shift in their summer distribution. Our objectives were to determine the climatic factors associated with Indiana bat maternity range and forecast changes in the amount and distribution of the range under future climates. We used Maxent to model the suitable climatic habitat of Indiana bats under current conditions and four future climate forecasts for 2021–30, 2031–40, 2041–50, and 2051–60. Average maximum temperature across the maternity season (May–August) was the most important variable in the model of current distribution of Indiana bat maternity colonies with suitability decreasing considerably above 28ºC. The areal extent of the summer maternity distribution of Indiana bats was forecasted to decline and be concentrated in the northeastern United States and Appalachian Mountains; the western part of the current maternity range (Missouri, Iowa, Illinois, Kentucky, Indiana, and Ohio) was forecasted to become climatically unsuitable under most future climates. Our models suggest that high temperatures may be a factor in roost-site selection at the regional scale and in the future, may also be an important variable at the microhabitat scale. When behavioral changes fail to mitigate the effects of high temperature, range shifts are likely to occur. Thus, habitat management for Indiana bat maternity colonies in the northeastern United States and Appalachian Mountains of the Southeast is critical as these areas will most likely serve as climatic refugia.

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Habitat suitability and connectivity modeling reveal priority areas for Indiana bat (Myotis sodalis) conservation in a complex habitat mosaic

et al. 2020

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Context Conservation for the Indiana bat (Myotis sodalis), a federally endangered species in the United States of America, is typically focused on local maternity sites; however, the species is a regional migrant, interacting with the environment at multiple spatial scales. Hierarchical levels of management may be necessary, but we have limited knowledge of landscape-level ecology, distribution, and connectivity of suitable areas in complex landscapes. Objectives We sought to (1) identify factors influencing M. sodalis maternity colony distribution in a mosaic landscape, (2) map suitable maternity habitat, and (3) quantify connectivity importance of patches to direct conservation action. Methods Using 3 decades of occurrence data, we tested a priori, hypothesis-driven habitat suitability models. We mapped suitable areas and quantified connectivity importance of habitat patches with probabilistic habitat availability metrics. Results Factors improving landscape-scale suitability included limited agriculture, more forest cover, forest edge, proximity to medium-sized water bodies, lower elevations, and limited urban development. Areas closer to hibernacula and rivers were suitable. Binary maps showed that 30% of the study area was suitable for M. sodalis and 29% was important for connectivity. Most suitable patches were important for intra-patch connectivity and far fewer contributed to inter-patch connectivity. Conclusions While simple models may be effective for small, homogenous landscapes, complex models are needed to explain habitat suitability in large, mixed landscapes. Suitability modeling identified factors that made sites attractive as maternity areas. Connectivity analysis improved our understanding of important areas for bats and prioritized areas to target for restoration.

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Overlap in Roosting Habits of Indiana Bats (Myotis sodalis) and Northern Bats (Myotis septentrionalis)

Cited by 30 publications

References 23 publications

Landscape features associated with the roosting habitat of Indiana bats and northern long-eared bats

Landscape features associated with the roosting habitat of Indiana bats and northern long-eared bats

Indiana bat summer maternity distribution: effects of current and future climates

Habitat suitability and connectivity modeling reveal priority areas for Indiana bat (Myotis sodalis) conservation in a complex habitat mosaic

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