干旱区生态环境知识资源中心(Arid): Out of the desert: Paleoclimatic changes drove the diversification of arid-adapted Ocymyrmex ants in southern Africa

Arid

DOI	10.1016/j.ympev.2023.107977
	Out of the desert: Paleoclimatic changes drove the diversification of arid-adapted Ocymyrmex ants in southern Africa
	Mbanyana, Nokuthula; Blaimer, Bonnie B.; Le Roux, Johannes J.; van Noort, Simon; Brady, Sean G.; Wossler, Theresa C.
通讯作者	Mbanyana, N
来源期刊	MOLECULAR PHYLOGENETICS AND EVOLUTION
ISSN	1055-7903
EISSN	1095-9513
出版年	2024
卷号	191
英文摘要	A highly endemic ant fauna is found in the arid regions of southern Africa, including species in the genus Ocymyrmex. This genus of ants has higher species richness in the western arid regions of southern Africa compared to tropical and subtropical parts of the continent. The processes that have produced these patterns of diversity and distribution of arid adapted ants in southern Africa have never been investigated. The diversification of many other taxa in the region has been associated with past climate fluctuations that occurred during the Miocene epoch. In this study, the nature and timing of historical processes that may have led to the diversification within Ocymyrmex were assessed. We hypothesized that past climate oscillations, characterized by long periods of aridification, have driven the current distribution of Ocymyrmex species that resulted in the highest species richness of the genus in the Deserts & xeric shrublands biome in southern Africa. Ninety-four Ocymyrmex worker specimens from Botswana, Kenya, Namibia, South Africa, Tanzania and Zimbabwe, representing 21 currently described species and six morphospecies, were included in a phylogenomic analysis. Phylogenies for the genus, based on next generation sequencing data from ultraconserved elements, were inferred using Maximum Likelihood, and a dating analysis was performed using secondary age estimates as calibration points. A distribution database of Ocymyrmex records was used to assign species ranges, which were then coded according to major biomes in southern Africa and used as input for biogeographical analysis. We explored the phylogenomic relationships of Ocymyrmex and analysed these within a biogeographical and paleoclimatic framework to disentangle the potential processes responsible for diversification in this group. Dating analyses estimated that the crown age of Ocymyrmex dates to the Oligocene, around 32 Ma. Diversification within this group occurred between the mid-Miocene (similar to 12.5 Ma) and Pleistocene (similar to 2 Ma). Our biogeographic analyses suggest that Ocymyrmex species originated in the south-western region of southern Africa, which is now part of the Deserts & xeric shrublands biome and diversified into eastern subtropical areas during the Pliocene. Paleoclimatic changes resulting in increased aridity during the Miocene likely drove the diversification of the genus Ocymyrmex. It is most likely that the diversification of grasslands, because of historical climate change, facilitated the diversification of these ants to the eastern parts of southern Africa when open grasslands replaced forests during the early Miocene.
英文关键词	Afrotropical region Biogeography Endemism Miocene Pliocene Ultraconserved elements (UCEs)
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001135236300001
WOS关键词	CLIMATE-CHANGE ; PHYLOGENETIC-RELATIONSHIPS ; SPECIES COMPLEX ; ROCK AGAMA ; EVOLUTION ; BIOGEOGRAPHY ; SPECIATION ; HYMENOPTERA ; VICARIANCE ; DISPERSAL
WOS类目	Biochemistry & Molecular Biology ; Evolutionary Biology ; Genetics & Heredity
WOS研究方向	Biochemistry & Molecular Biology ; Evolutionary Biology ; Genetics & Heredity
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/404933
推荐引用方式 GB/T 7714	Mbanyana, Nokuthula,Blaimer, Bonnie B.,Le Roux, Johannes J.,et al. Out of the desert: Paleoclimatic changes drove the diversification of arid-adapted Ocymyrmex ants in southern Africa[J],2024,191.
APA	Mbanyana, Nokuthula,Blaimer, Bonnie B.,Le Roux, Johannes J.,van Noort, Simon,Brady, Sean G.,&Wossler, Theresa C..(2024).Out of the desert: Paleoclimatic changes drove the diversification of arid-adapted Ocymyrmex ants in southern Africa.MOLECULAR PHYLOGENETICS AND EVOLUTION,191.
MLA	Mbanyana, Nokuthula,et al."Out of the desert: Paleoclimatic changes drove the diversification of arid-adapted Ocymyrmex ants in southern Africa".MOLECULAR PHYLOGENETICS AND EVOLUTION 191(2024).