Habitat Associations of Bottomland Bats, With Focus on Rafinesque's Big-Eared Bat and Southeastern Myotis

Medlin, Rex E.; Risch, Thomas S.

doi:10.1674/0003-0031(2008)160[400:haobbw]2.0.co;2

Cited by 8 publications

(7 citation statements)

References 14 publications

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“…In any heterogeneous landscape, microhabitats vary in their biotic and abiotic features (Smith & Ballinger 2001) and hence in levels of resource availability, in the degree of exposure to predators, parasites and environmental extremes, and in opportunities for mating (e.g. Milne et al 1989;Bauwens et al 1999;Crowley & Garnett 2001;Bos et al 2002;Medlin & Risch 2008). In their study of sleepy lizards, Kerr and Bull (2006a) determined that multinucleate cores within a lizard's home range were closely associated with key refuge sites.…”

Section: Discussionmentioning

confidence: 99%

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Spatial ecology of bluetongue lizards (Tiliqua spp.) in the Australian wet–dry tropics

2012

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New technologies for quantifying animal locations enable us to document habitat-selection patterns of cryptic taxa in extraordinary detail. Northern bluetongues (Tiliqua scincoides intermedia) and centralian bluetongues (Tiliqua multifasciata) are large heavy-bodied scincid lizards that are broadly sympatric in the wet-dry tropics of north-western Australia.We used data from GPS-based radiotelemetry (n = 49 lizards, tracked for 2-121 days, total n = 61 640 locations) to examine the size, internal structure and overlap of lizard home ranges. Despite substantial habitat differences at our two study sites (semi-arid and relatively pristine habitat at Keep River National Park, Northern Territory, vs. highly disturbed and fragmented flood plain habitat in an agricultural area near Kununurra, Western Australia), home ranges were similar between the two areas, and between the two species. Our radiotracked lizards continued to disperse into previously unused areas throughout the duration of the study, so that the total areas used by lizards continued to increase. Based on the minimum convex polygon method, total home ranges averaged 4 ha (range 2-12 ha), but only about two-thirds of each home range was used intensively. Each home range had multiple core areas, and overlap of core as well as peripheral areas (especially with same-sex conspecifics) was high at the disturbed (Western Australia) site where lizard densities were high. The concentration of lizard activity within small core areas, often used by multiple individuals, suggests that these heavily used sites are critical to lizard conservation. However, the lizards' infrequent long-distance displacements also make them vulnerable to changes in the wider landscape mosaic. Because GPS-based radiotelemetry can quantify habitat use at finer spatial and temporal scales than earlier technologies, it can provide a robust base for management of at-risk fauna.

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Section: Discussionmentioning

confidence: 99%

“…; Crowley & Garnett ; Bos et al . ; Medlin & Risch ). In their study of sleepy lizards, Kerr and Bull () determined that multinucleate cores within a lizard's home range were closely associated with key refuge sites.…”

Section: Discussionmentioning

confidence: 99%

Spatial ecology of bluetongue lizards (Tiliqua spp.) in the Australian wet–dry tropics

2012

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“…Unsupervised classification is recommended for studies of land use [23], and is especially suitable for studies of large expanses of riparian habitat (24) in an agriculture matrix [25]. Due to the homogeneous composition, even age, and similar structure of the forest fragments in question [15,16], the two forest classes were combined. Recoding of the two forest classes into a single class was based upon the identification of forest patches (ground-truthing) from 60 randomly chosen ground control points (GCPs), ten within each subset, and habitat plots.…”

Section: Habitat Classificationmentioning

confidence: 99%

“…Of the hardwood forests remaining in the MRV, approximately 300,000 hectares or 19.0% are in Arkansas [14]. The MRV of Arkansas is an ideal location to study fragmentation, as the remaining forests have similar microhabitat characteristics, are located in protected areas, and are isolated by a vast expanse of row crops [15,16].…”

Section: Introductionmentioning

confidence: 99%

“…This work is unique in scale of site replications, as the majority of landscape analyses have focused on smaller sized replicates (e.g., 1,500 m 2 to 4 km 2 [19]). Previous micro-habitat structures varied in their ability to explain distributions and species richness [16], prompting us to look for a more global explanation. Fragmentation metrics are good indicators of habitat use [20] and distribution [21] of bat species.…”

Section: Introductionmentioning

confidence: 99%

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Responses of Bats to Forest Fragmentation in the Mississippi River Alluvial Valley, Arkansas, USA

et al. 2010

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Intense conversion of bottomland hardwood forests to rice and soybeans in the Mississippi River Valley of Arkansas has restricted the remaining forest to isolated fragments. Habitat fragmentation has proven to be detrimental to population sustainability of several species, and is the subject of intense study with often species and latitude specific responses. We compared both coarse land area classes and landscape fragmentation metrics from six 30 km × 30 km subsets centered on publicly owned management areas to bat captures obtained from a 2005 population study. Patch density was the strongest predictor of total captures (R2 = 0.801, p = 0.016) and of Myotis austroriparius captures (R2 = 0.856, p = 0.008). Our findings indicate that patch density and area are important predictors of bottomland bat captures

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Seasonal Shifts in Nocturnal Habitat Use by Coastal Bat Species

2021

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Sensitivity of bats to land use change depends on their foraging ecology, which varies among species based on ecomorphological traits. Additionally, because prey availability, vegetative clutter, and temperature change throughout the year, some species may display seasonal shifts in their nocturnal habitat use. In the Coastal Plain of South Carolina, USA, the northern long‐eared bat (Myotis septentrionalis), southeastern myotis (Myotis austroriparius), tri‐colored bat (Perimyotis subflavus), and northern yellow bat (Lasiurus intermedius) are species of conservation concern that are threatened by habitat loss. Our objective was to identify characteristics of habitat used by these species during their nightly active period and compare use between summer and winter. We conducted acoustic surveys at 125 sites during May–August and at 121 of the same 125 sites December–March 2018 and 2019 in upland forests, bottomland forests, fields, ponds, and salt marsh and used occupancy models to assess habitat use. The northern long‐eared bat and southeastern myotis (i.e., myotis bats) used sites that were closer to hardwood stands, pine stands, and fresh water year‐round. We did not identify any strong predictors of tri‐colored bat habitat use in summer, but during winter they used bottomland forests, fields, and ponds more than salt marsh and upland forests. During summer and winter, northern yellow bats used sites close to fresh water and salt marsh. Additionally, during summer they used fields, ponds, and salt marsh more than upland and bottomland forests, but in winter they used bottomland forests, fields, and ponds more than upland forest and salt marsh. Our results highlight important land cover types for bats in this area (e.g., bottomland forests, ponds, and salt marsh), and that habitat use changes between seasons. Accounting for and understanding how habitat use changes throughout the year will inform managers about how critical habitat features may vary in their importance to bats throughout the year. © 2021 The Wildlife Society.

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Habitat Associations of Bottomland Bats, With Focus on Rafinesque's Big-Eared Bat and Southeastern Myotis

Cited by 8 publications

References 14 publications

Spatial ecology of bluetongue lizards (Tiliqua spp.) in the Australian wet–dry tropics

Spatial ecology of bluetongue lizards (Tiliqua spp.) in the Australian wet–dry tropics

Responses of Bats to Forest Fragmentation in the Mississippi River Alluvial Valley, Arkansas, USA

Seasonal Shifts in Nocturnal Habitat Use by Coastal Bat Species

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