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A unique Lepidopteran assemblage in primary forest understory of central Sri Lanka
Caitlin Slater,Carl Tolley,Chandima Fernando,Michael A. Weston 국립중앙과학관 2019 Journal of Asia-Pacific Biodiversity Vol.12 No.2
Sri Lankan Lepidopterans are diverse and increasingly inhabit areas undergoing rapid anthropogenic change. We examined butterfly assemblages in five habitat types in central Sri Lanka, an area with a mosaic of habitat types (primary and secondary forest, wetland margins, shrubland, and home gardens). Sixteen quadrats in each habitat type were repeat-sampled. Quadrats differed in proportional cover of different microhabitats and in microclimate. Butterfly abundance and richness were lowest in primary forests (PFs). Assemblages of butterflies were generally similar across all habitat types with the exception of PFs, which featured a unique assemblage. This study reinforces the importance of PFs in butterfly conservation as it harbors a unique and relatively low-abundance assemblage of species.
Danah Harbour,Ella Henson,Chelsea Boers,Darcy Truman,Chandima Fernando,Patrick J. Guay,Michael A. Weston 한국응용곤충학회 2019 Journal of Asia-Pacific Entomology Vol.22 No.1
Escape behaviour is a critical component of invertebrate life history but is poorly studied. Flight initiation distance (FID) indexes escape propensity, and is wellstudied in vertebrates but is entirely unstudied in Lepidopterans, despite their obvious escape behaviour. Here we test two general principles regarding FID as derived from studies of vertebrates to examine if they apply to Sri Lankan butterflies: 1) that FID is a species-specific trait and 2) that FID increases with Starting Distance, the distance at which the experimenter begins an approach. We collected 295 FIDs from 17 species and find that 1) FIDs are a tractable way of indexing butterfly escape and 2) both the general principles tested apply to butterfly escape. We also present FIDs of these species to encourage further data collection and comparative analysis of butterfly escape.