A Small-Scale Response of Urban Bat Activity to Tree Cover

Moretto, Lauren

doi:10.22215/etd/2018-12960

Cited by 1 publication

(1 citation statement)

References 38 publications

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“…Studies on numerous taxa demonstrate species‐specific scale responses to habitat loss and fragmentation including amphibians (Moraga et al, 2019), birds (Bradter, Kunin, Altringham, Thom, & Benton, 2013; Eigenbrod, Hecnar, & Fahrig, 2011; Gilroy, Medina Uribe, Haugaasen, & Edwards, 2015; Thornton & Fletcher, 2014), insects (Bellier, Monestiez, Durbec, & Candau, 2007; Holland, Bert, & Fahrig, 2004), arboreal mammals including primates (Galán‐Acedo et al, 2018; Gray, Phan, & Long, 2010; Moretto, Fahrig, Smith, & Francis, 2019; Ordóñez‐Gómez, Arroyo‐Rodríguez, Nicasio‐Arzeta, & Cristóbal‐Azkarate, 2015; Thornton, Branch, & Sunquist, 2011), and terrestrial mammals (de Knegt et al, 2011). However, we do not fully understand what determines the species‐specific scale of effect (Jackson & Fahrig, 2012).…”

Section: Introductionmentioning

confidence: 99%

Occurrence of lemurs in landscapes and their species‐specific scale responses to habitat loss

Steffens

Malabet

Lehman

2020

American J Primatol

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Studies on the impact of habitat loss on species occurrence consistently find that the amount of habitat (measured as patch area) is a major determinant of species occurrence at a patch-level. However, patch-level research may fail to detect important patterns and processes only observable at a landscape-level. A landscapelevel approach that incorporates species-specific scale responses is needed to better understand what drives species occurrence. Our aim was to determine the landscape-level scale of effect of habitat amount on the occurrence of three species of nocturnal lemurs (Cheirogaleus medius, Microcebus murinus, and M. ravelobensis).We surveyed line transects to determine the occurrence of three lemur species within a fragmented landscape of deciduous dry forest and anthropogenic grassland in northwestern Madagascar. To determine the scale of effect of habitat loss on lemur occurrence, we compared logistic regression models of occurrence against habitat amount among eight different landscape scales using Akaike's Information Criterion values. We found differing scale responses among the lemurs in our study.Occurrence of C. medius responded to habitat amount at scales between 0.5-4 ha, M. murinus at scales between 1 and 4 ha and M. ravelobensis at scales between 0.125 and 4 ha. We suggest that the scale of effect for C. medius is mediated by their ability to hibernate. A relatively lower scale-response for Microcebus spp. likely reflect their omnivorous diet, small habitat requirements, and limited dispersal ability. Differences in scale responses between M. murinus and M. ravelobensis are likely a result of differing dispersal ability and responses to edge effects between these species. Our study is among the first on lemurs to show the value of a landscape-level approach when assessing the effects of habitat loss on species occurrence. K E Y W O R D S arboreal, biogeography, fragments, Madagascar, primate

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