Species richness patterns and functional traits of the bat fauna of arid southern Africa

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http://hdl.handle.net/10138/278430

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Monadjem , A , Conenna , I , Taylor , P J & Schoeman , C 2018 , ' Species richness patterns and functional traits of the bat fauna of arid southern Africa ' , HYSTRIX - the Italian Journal of Mammalogy , vol. 29 , no. 1 , pp. 19-24 . https://doi.org/10.4404/hystrix-00016-2017

Title: Species richness patterns and functional traits of the bat fauna of arid southern Africa
Author: Monadjem, Ara; Conenna, Irene; Taylor, Peter J.; Schoeman, Corrie
Contributor: University of Helsinki, Helsinki Institute of Sustainability Science (HELSUS)
Date: 2018
Language: eng
Number of pages: 6
Belongs to series: HYSTRIX - the Italian Journal of Mammalogy
ISSN: 0394-1914
URI: http://hdl.handle.net/10138/278430
Abstract: The bat fauna of arid regions is still poorly studied mostly due to a lack of interest in areas with low species richness and a low number of threatened species. In this study, we reviewed the status of bat diversity in the arid parts of southern Africa, with the aim of setting up a baseline for future work. In particular, we described species richness patterns across four arid zones within the region (Namib Desert, Kalahari, Nama Karoo and Succulent Karoo), exploring abiotic gradients and local landscape structure. Additionally, we examined bat functional groups in this region and compared them with those of three other arid regions of the world to identify potential similarities and differences. The southern African arid region hosted 17 bat species, representing eight families, of which three are endemic to the region (Rhinolophus denti, Laephotis namibensis and Cistugo seabrae) and one is vagrant (the fruit bat Eidolon helvum). Species richness varied spatially within this arid region, being highest in the drier but topographically heterogeneous Namib Desert, probably as a result of roost availability. With regards to functional groups, the southern African arid region had few bat species adapted to foraging in open spaces, particularly when compared with the neighbouring savannahs. Drawing from this study, we suggest that: a) despite species richness decreasing with increasing aridity at the sub-continental scale, at a more local scale landscape features (e.g. habitat structure) might be more relevant than aridity in determining bat species richness; and b) an unknown factor, possibly patterns of temperature limiting the availability of insects flying high above the ground, restricted the diversity of the open air foragers throughout the region. We highlight additional areas of research worth investigation.
Subject: 1181 Ecology, evolutionary biology
Southern African arid region
Kalahari
Namib
Succulent Karoo
Nama Karoo
species richness
wing morphology
echolocation
INSECTIVOROUS BATS
DESERT
ECHOLOCATION
BIODIVERSITY
DIVERSITY
ECOLOGY
HABITAT
IDENTIFICATION
ASSEMBLAGES
COMPETITION
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