Concentration of bat activity in riparian habitats over an elevational gradient

Grindal, Scott D.; Morissette, Jacques; Brigham, R. Mark

doi:10.1139/z99-062

Cited by 134 publications

(51 citation statements)

References 33 publications

(51 reference statements)

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“…Interestingly, the only migratory moth that males fed on more often was Rhodometra sacraria, a small species known to migrate at relatively low altitudes [22]. The pattern of altitudinal segregation suggested here for T. teniotis is inverse from that described in other species [5,23], where females were found in lower elevations, associated with resourceabundant riparian habitats. However, vertical segregation of genders over the same foraging grounds has never been analysed or found before.…”

Section: Discussionmentioning

confidence: 48%

Female dietary bias towards large migratory moths in the European free-tailed bat ( Tadarida teniotis )

et al. 2016

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In bats, sexual segregation has been described in relation to differential use of roosting and foraging habitats. It is possible that variation may also exist between genders in the use of different prey types. However, until recently this idea was difficult to test owing to poorly resolved taxonomy of dietary studies. Here, we use high-throughput sequencing to describe gender-related variation in diet composition of the European free-tailed bat (Tadarida teniotis), while controlling for effects of age and season. We analysed guano pellets collected from 143 individuals mist-netted from April to October 2012 and 2013, in northeast Portugal. Moths (Lepidoptera; mainly Noctuidae and Geometridae) were by far the most frequently recorded prey, occurring in nearly all samples and accounting for 96 out of 115 prey taxa. There were significant dietary differences between males and females, irrespective of age and season. Compared to males, females tended to consume larger moths and more moths of migratory behaviour (e.g. Autographa gamma). Our study provides the first example of gender-related dietary variation in bats, illustrating the value of novel molecular tools for revealing intraspecific variation in food resource use in bats and other insectivores.

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Section: Discussionmentioning

confidence: 48%

Female dietary bias towards large migratory moths in the European free-tailed bat ( Tadarida teniotis )

et al. 2016

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“…The bats prefer to roost inside forests in the study area (Rogeri 2011), so forests play a key role in bat biodiversity maintenance (Grindal et al 1999;GalindoGonzáles and Sosa 2003;Ober and Hayes 2008).…”

Section: Discussionmentioning

confidence: 99%

Bats (Mammalia: Chiroptera) in a cerrado landscape in São Carlos, southeastern Brazil

Muylaert¹,

Teixeira²,

Hortenci³

et al. 2014

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We studied bat assemblages in seven sampling sites in the rural zone of São Carlos, southeastern Brazil. The sampling sites were two riparian forests, two types of Brazilian savanna (cerrado sensu stricto and cerradão), a Pinus plantation, a semideciduous forest, and an open area. We sampled bats from January 2007 to December 2011 with mist nets, totalizing 100 capture nights and 38,587 m2h of capture effort. We captured 523 individual bats of 23 species belonging to three families. Sturnira lilium was the most frequently captured species and represented 40% of all captures, followed by Carollia perspicillata (17%) and Glossophaga soricina (12%). The studied heterogeneous landscape harbors a rich bat fauna compared to other studies with similar effort in well-preserved savannas.

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“…Unlike species richness, bat activity generally seems to decrease with altitude. This decrease of bat activity with altitude is suggested to be caused by a decline of reproductive females found with altitude related to lower temperatures and food availability (Grindal et al 1999, Cryan et al 2000, Russo 2002, Erickson and Adams 2003, Kanuch and Kristin 2006, Dunn and Waters 2012.…”

Section: Introductionmentioning

confidence: 97%

Changes of bat species composition over altitudinal gradients on northern and southern aspects of the Soutpansberg mountain range, South Africa

et al. 2017

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Changes of bat species composition over altitudinal gradients on northern and southern aspects of the Soutpansberg mountain range, South Africa DOI 10.1515/mammalia-2015-0055 Received March 24, 2015 accepted December 16, 2015 Abstract: In order to gain insight into the pattern of bat species composition over altitude and the environmental variables driving the observed pattern, we compared data from moist southern and drier northern aspects of the Soutpansberg range in northern South Africa. Acoustical monitoring and additional capturing of bats was used for analysis of species distribution patterns and comparisons of community composition. Bat activity generally followed a linear decline with increasing altitude, possibly related to reproductive females preferring lower altitudes. Species richness followed a hump-shaped distribution on the northern aspect and across the transect, whereas a pattern of a linear decline was observed on the southern aspect. Our study strongly supports a previously published climate model for insectivorous bats which assumes that water availability linked with temperature determines the shape of altitudinal distribution in bat species.Step-wise selection from multiple regression models retained habitat type and/or measures of habitat structure in all final models, supporting several other studies in that vegetation correlated to altitude is a primary determinant of bat species distribution over altitude. This study also supports that the Soutpansberg is a biodiversity hotspot for bats and emphasises that conservation efforts should by no means ignore the lower altitudes.

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Concentration of bat activity in riparian habitats over an elevational gradient

Cited by 134 publications

References 33 publications

Female dietary bias towards large migratory moths in the European free-tailed bat ( Tadarida teniotis )

Female dietary bias towards large migratory moths in the European free-tailed bat ( Tadarida teniotis )

Bats (Mammalia: Chiroptera) in a cerrado landscape in São Carlos, southeastern Brazil

Changes of bat species composition over altitudinal gradients on northern and southern aspects of the Soutpansberg mountain range, South Africa

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