气候变化领域集成服务门户(CCPortal): Topographic barriers drive the pronounced genetic subdivision of a range-limited fossorial rodent

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DOI	10.1111/mec.17271
	Topographic barriers drive the pronounced genetic subdivision of a range-limited fossorial rodent
	Reuber, Victoria M.; Westbury, Michael V.; Rey-Iglesia, Alba; Asefa, Addisu; Farwig, Nina; Miehe, Georg; Opgenoorth, Lars; Sumbera, Radim; Wraase, Luise; Wube, Tilaye; Lorenzen, Eline D.; Schabo, Dana G.
发表日期	2024
ISSN	0962-1083
EISSN	1365-294X
起始页码	33
结束页码	5
卷号	33 期号:5
英文摘要	Due to their limited dispersal ability, fossorial species with predominantly belowground activity usually show increased levels of population subdivision across relatively small spatial scales. This may be exacerbated in harsh mountain ecosystems, where landscape geomorphology limits species' dispersal ability and leads to small effective population sizes, making species relatively vulnerable to environmental change. To better understand the environmental drivers of species' population subdivision in remote mountain ecosystems, particularly in understudied high-elevation systems in Africa, we studied the giant root-rat (Tachyoryctes macrocephalus), a fossorial rodent confined to the afro-alpine ecosystem of the Bale Mountains in Ethiopia. Using mitochondrial and low-coverage nuclear genomes, we investigated 77 giant root-rat individuals sampled from nine localities across its entire similar to 1000 km(2) range. Our data revealed a distinct division into a northern and southern group, with no signs of gene flow, and higher nuclear genetic diversity in the south. Landscape genetic analyses of the mitochondrial and nuclear genomes indicated that population subdivision was driven by slope and elevation differences of up to 500 m across escarpments separating the north and south, potentially reinforced by glaciation of the south during the Late Pleistocene (similar to 42,000-16,000 years ago). Despite this landscape-scale subdivision between the north and south, weak geographic structuring of sampling localities within regions indicated gene flow across distances of at least 16 km at the local scale, suggesting high, aboveground mobility for relatively long distances. Our study highlights that despite the potential for local-scale gene flow in fossorial species, topographic barriers can result in pronounced genetic subdivision. These factors can reduce genetic variability, which should be considered when developing conservation strategies.
英文关键词	afro-alpine; conservation genetics; fossorial rodents; landscape genetics; population genetics
语种	英语
WOS研究方向	Biochemistry & Molecular Biology ; Environmental Sciences & Ecology ; Evolutionary Biology
WOS类目	Biochemistry & Molecular Biology ; Ecology ; Evolutionary Biology
WOS记录号	WOS:001152055200001
来源期刊	MOLECULAR ECOLOGY
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/301785
作者单位	Philipps University Marburg; University of Copenhagen; Philipps University Marburg; Philipps University Marburg; Swiss Federal Institutes of Technology Domain; Swiss Federal Institute for Forest, Snow & Landscape Research; University of South Bohemia Ceske Budejovice; Philipps University Marburg; Addis Ababa University
推荐引用方式 GB/T 7714	Reuber, Victoria M.,Westbury, Michael V.,Rey-Iglesia, Alba,et al. Topographic barriers drive the pronounced genetic subdivision of a range-limited fossorial rodent[J],2024,33(5).
APA	Reuber, Victoria M..,Westbury, Michael V..,Rey-Iglesia, Alba.,Asefa, Addisu.,Farwig, Nina.,...&Schabo, Dana G..(2024).Topographic barriers drive the pronounced genetic subdivision of a range-limited fossorial rodent.MOLECULAR ECOLOGY,33(5).
MLA	Reuber, Victoria M.,et al."Topographic barriers drive the pronounced genetic subdivision of a range-limited fossorial rodent".MOLECULAR ECOLOGY 33.5(2024).