Distribution and Roost Selection of Bats on Newfoundland

Park, Allysia C.; Broders, Hugh G.

doi:10.1656/045.019.0203

Cited by 8 publications

(10 citation statements)

References 49 publications

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“…Sexual differences in the choice of roosts are often reported [ 36 – 39 ], with reproductive females ( i . e ., pregnant and lactating females) selecting for trees with larger diameters [ 36 , 40 ] compared to males and non-reproductive females. Large diameter trees offer greater thermal inertia compared to trees with smaller diameters [ 40 – 42 ].…”

Section: Introductionmentioning

confidence: 99%

“…e ., pregnant and lactating females) selecting for trees with larger diameters [ 36 , 40 ] compared to males and non-reproductive females. Large diameter trees offer greater thermal inertia compared to trees with smaller diameters [ 40 – 42 ]. The thermoregulatory advantage of warm and stable temperatures [ 43 – 45 ] is commonly accepted as a major driver of roost selection by bats [ 46 ], especially in the case of reproductive females [ 5 , 46 – 48 ].…”

Section: Introductionmentioning

confidence: 99%

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Exploring Regional Variation in Roost Selection by Bats: Evidence from a Meta-Analysis

2015

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Background and AimsTree diameter, tree height and canopy closure have been described by previous meta-analyses as being important characteristics in roost selection by cavity-roosting bats. However, size and direction of effects for these characteristics varied greatly among studies, also referred to as heterogeneity. Potential sources of heterogeneity have not been investigated in previous meta-analyses, which are explored by correlating additional covariates (moderator variables). We tested whether effect sizes from 34 studies were consistent enough to reject the null hypothesis that trees selected by bats did not significantly differ in their characteristics from randomly selected trees. We also examined whether heterogeneity in tree diameter effect sizes was correlated to moderator variables such as sex, bat species, habitat type, elevation and mean summer temperature.MethodsWe used Hedges’ g standardized mean difference as the effect size for the most common characteristics that were encountered in the literature. We estimated heterogeneity indices, potential publication bias, and spatial autocorrelation of our meta-data. We relied upon meta-regression and multi-model inference approaches to evaluate the effects of moderator variables on heterogeneity in tree diameter effect sizes.ResultsTree diameter, tree height, snag density, elevation, and canopy closure were significant characteristics of roost selection by cavity-roosting bats. Size and direction of effects varied greatly among studies with respect to distance to water, tree density, slope, and bark remaining on trunks. Inclusion of mean summer temperature and sex in meta-regressions further explained heterogeneity in tree diameter effect sizes.ConclusionsRegional differences in roost selection for tree diameter were related to mean summer temperature. Large diameter trees play a central role in roost selection by bats, especially in colder regions, where they are likely to provide a warm and stable microclimate for reproductive females. Records of summer temperature fluctuations inside and outside tree cavities that are used by bats should be included in future research.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Exploring Regional Variation in Roost Selection by Bats: Evidence from a Meta-Analysis

2015

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“…Regardless of the ambiguity of the report by Stearns, Myotis septentrionalis occurs in all adjacent jurisdictions (van Zyll de Jong 1985; Broders et al 2003;Henderson et al 2009;Park and Broders 2012), and we expect that the distribution of M. septentrionalis might extend into Labrador. However, since no known systematic survey for bats has been conducted in Labrador, an understanding of their distribution and basic biology is lacking for the jurisdiction.…”

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confidence: 67%

“…trapping took place between 23 June and 28 July in 2011, 2012, and 2013. to determine whether the distribution of Myotis septentrionalis extends into Labrador, we set two or three mist nets and a harp trap across forested roads and trails during one night of sampling at each of four candidate sites ( Figure 1). We targeted mature forests as trapping areas, because this species typically roosts in decaying live trees or snags associated with such stands (Jung et al 1999;Broders and Forbes 2004;garroway and Broders 2008;Park and Broders 2012).…”

Section: First Records Of the Northern Myotis (Myotis Septentrionalismentioning

confidence: 99%

First records of the Northern Myotis (<em>Myotis septentrionalis</em>) from Labrador and summer distribution records and biology of Little Brown Bats (<em>Myotis lucifugus</em>) in southern Labrador

2013

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Broders, Hugh g., Lynne e. Burns, and Sara C. McCarthy. 2013 We conducted the first regional survey of bats in Labrador (Newfoundland and Labrador) to provide information on the distribution and biology of bats in this region. our approach was to locate maternity roosts of Myotis lucifugus (Little Brown Bat) via word of mouth and then capture Little Brown Bats as they emerged from their day-roosts. We also surveyed for free-flying forest-dwelling bats using mist nets and a harp trap along forested trails and roads in southern Labrador. We captured 355 M. lucifugus at nine maternity roosts and one non-reproductive adult female M. lucifugus at a forested site. We captured two adult male Myotis septentrionalis (Northern Myotis) at two of the three forested sites (gull Island and grand Lake Road). these are the first confirmed records of this species from Labrador. Maternity roosts of M. lucifugus often had several hundred individuals. the proportion of female M. lucifugus captured at a roost that were either pregnant or lactating ranged from 35% to 96%; the estimated average date of parturition in 2012 was 10 July.

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“…Male Myotis bats selected slightly larger trees compared to random trees. Male bats are usually solitary roosters, so that they do not necessarily require large cavities in which to rest compared to lactating females (Psyllakis and Brigham 2006;Willis et al 2006;Park and Broders 2012). Lacki and Schwierjohann (2001), and Perry and Thill (2007) found that male bats used small diameter trees (mean DBH < 15 cm) to roost.…”

Section: Discussionmentioning

confidence: 99%

Selection of roosting habitat by male Myotis bats in a boreal forest

et al. 2015

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21Male little brown bat (Myotis lucifugus (Le Conte, 1831)) and northern long-eared bat (Myotis 22 septentrionalis (Trouessart, 1897)), often roost under exfoliating bark, within the trunks and 23 cavities of trees during summer. Current lack of knowledge about the roosting ecology of these 24 species in boreal forest limits our understanding of how they may be affected by logging. The 25 main objective was to identify tree and forest stand features that were selected by bats for genre Myotis au sein des sapinières à bouleau blanc. 58Mots clés: arbre-gîte, chicots, chauve-souris nordique, forêt boréale, LiDAR, Myotis lucifugus, 59Myotis septentrionalis, petite chauve-souris brune, Québec, sélection d'habitat 60 61 4

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Distribution and Roost Selection of Bats on Newfoundland

Cited by 8 publications

References 49 publications

Exploring Regional Variation in Roost Selection by Bats: Evidence from a Meta-Analysis

Exploring Regional Variation in Roost Selection by Bats: Evidence from a Meta-Analysis

First records of the Northern Myotis (<em>Myotis septentrionalis</em>) from Labrador and summer distribution records and biology of Little Brown Bats (<em>Myotis lucifugus</em>) in southern Labrador

Selection of roosting habitat by male Myotis bats in a boreal forest

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