干旱区生态环境知识资源中心(Arid): Influence of climate and landscape on genetic differentiation of aardvarks (Orycteropus afer)

Arid

DOI	10.1111/ddi.13792
	Influence of climate and landscape on genetic differentiation of aardvarks (Orycteropus afer)
	Epps, Clinton W.; Crowhurst, Rachel S.; Spaan, Robert; Weldy, Matthew; Tavalire, Hannah F.
通讯作者	Epps, CW
来源期刊	DIVERSITY AND DISTRIBUTIONS
ISSN	1366-9516
EISSN	1472-4642
出版年	2024
卷号	30 期号:3
英文摘要	Aim: As climate change accelerates, assessing how climate shapes gene flow and neutral and adaptive genetic differentiation on landscapes is increasingly important. Aardvarks (Orycteropus afer) are ecologically important in sub-Saharan Africa but are sensitive to human pressures and increasing aridity. We used individual, population and landscape genetic approaches to infer the influence of landscape, climate and potential adaptive differences on gene flow.Location: We surveyed 8 protected and 4 privately owned areas in South Africa, 2 protected areas in Eswatini and one location in Kenya during 2016-2018.Methods: We developed microsatellite markers and methods for DNA extraction from faeces, collected and genotyped faecal samples from focal areas and estimated genetic structure. We inferred space use from individual redetections, tested for close relatives and estimated genetic neighbourhood distance. We applied individual-based landscape genetic analyses at multiple scales to test hypotheses about genetic differentiation by landscape resistance and potential adaptive differences.Results: We developed 19 variable microsatellite loci and collected 253 faecal samples from 13 focal areas. We genotyped 104 samples successfully at >= 8 loci as needed for individual identification. The genetic structure suggested 3 regional divisions in South Africa. We detected individuals at locations <= 7.3 km distant and closely related individuals at <= 44 km; genetic neighbourhood distance was <55 km. Lower precipitation increased landscape resistance and strongly predicted genetic differentiation at most spatial scales. Temperature differences at sampling sites also influenced structure, suggesting climate-associated adaptive differences.Main Conclusions: The genetic structure of aardvarks is strongly shaped by climate, with arid areas limiting gene flow and reflects apparent isolation by adaptation associated with temperature. Dispersal distances likely are <55 km. The markers we developed will facilitate studies of space use, dispersal, population density or survival. Aridification will increase fragmentation and we recommend monitoring aardvark presence as an indicator of ecosystem change associated with aridification.
英文关键词	climate isolation by adaptation landscape genetics microsatellites Orycteropus afer Tubulidentata
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:001126750100001
WOS关键词	MODEL SELECTION ; FLOW ; CONNECTIVITY ; ADAPTATION ; DIVERGENCE ; PHYLOGENY ; DISPERSAL ; INFERENCE ; SURFACES ; PROGRAM
WOS类目	Biodiversity Conservation ; Ecology
WOS研究方向	Biodiversity & Conservation ; Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/403297
推荐引用方式 GB/T 7714	Epps, Clinton W.,Crowhurst, Rachel S.,Spaan, Robert,et al. Influence of climate and landscape on genetic differentiation of aardvarks (Orycteropus afer)[J],2024,30(3).
APA	Epps, Clinton W.,Crowhurst, Rachel S.,Spaan, Robert,Weldy, Matthew,&Tavalire, Hannah F..(2024).Influence of climate and landscape on genetic differentiation of aardvarks (Orycteropus afer).DIVERSITY AND DISTRIBUTIONS,30(3).
MLA	Epps, Clinton W.,et al."Influence of climate and landscape on genetic differentiation of aardvarks (Orycteropus afer)".DIVERSITY AND DISTRIBUTIONS 30.3(2024).