干旱区生态环境知识资源中心(Arid): Diversification and gene flow of tilapia species driven by ecological changes in lowland and mountain areas of southern Mauritania

Arid

DOI	10.1007/s10682-019-10017-0
	Diversification and gene flow of tilapia species driven by ecological changes in lowland and mountain areas of southern Mauritania
	Dilyte, Jolita 1; Sabatino, Stephen 1; Godinho, Raquel 1,2,3; Brito, Jose Carlos 1,2
通讯作者	Brito, Jose Carlos
来源期刊	EVOLUTIONARY ECOLOGY
ISSN	0269-7653
EISSN	1573-8477
出版年	2020
卷号	34 期号:1 页码:133-146
英文摘要	Haplotilapiine are members of Cichlidae (cichlid fishes), one of the most species-rich vertebrate families. Many haplotilapiines diversified via allopatric divergence, sexual selection, hybridization and ecological adaptation, making them excellent models for evolutionary research. One extraordinary example of how haplotilapiine diversified are the species found within the Sahara desert, surviving in isolated wetlands for thousands of years. Seasonal, and longer, climate cycles in these areas have resulted in periods of connectivity and isolation within and between lowland and mountain regions via ephemeral rivers, which highly impacts the potential for migration of water-species. Here we studied how ecological variability and secondary contact have affected the population genetics of haplotilapiine cichlid fishes (Sarotherodon galilaeus), in the lowland Karakoro sub-basin and highland Afolle mountain regions of Mauritania. We used DNA-sequence data of mitochondrial (ND2, N = 59) and nuclear (S7 1st intron, N = 32) genes, and microsatellite markers data (13 novel loci developed for Sarotherodon, N = 61). Our results based on microsatellite data showed two genetically differentiated lowland groups of S. galilaeus that exist in sympatry. Absence of one of these groups in mountain areas can be due to small sample size or local extinction. We found no significant genetic differentiation between lowland and mountain based on microsatellite and mtDNA data, supporting our hypothesis of recent, downstream gene flow. As expected, genetic diversity was significantly lower in mountain population, which can be due to different factors, including stochastic effects or downstream migration increasing diversity via gene flow. Ecological changes (seasonal and long-term) have likely driven divergence and posterior secondary contacts on the studied Sarotherodon lineages at multiple times, leaving open questions for future studies about the specifics of these evolutionary processes. Moreover, the pattern of genetic diversity in lowland and mountain populations highlights the importance of protecting geographically isolated areas for long-term persistence of tilapia species.
英文关键词	Cichlid fishes Haplotilapiine Genetic diversity Divergence Secondary contact
类型	Article
语种	英语
国家	Portugal ; South Africa
收录类别	SCI-E
WOS记录号	WOS:000494220100001
WOS关键词	CICHLID FISHES ; POPULATION-STRUCTURE ; HYBRIDIZATION ; EVOLUTION ; MITOCHONDRIAL ; SPECIATION ; PHYLOGENY ; INFERENCE ; PISCES ; SAHARA
WOS类目	Ecology ; Evolutionary Biology ; Genetics & Heredity
WOS研究方向	Environmental Sciences & Ecology ; Evolutionary Biology ; Genetics & Heredity
EI主题词	2019-11-04
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/310749
作者单位	1.Univ Porto, Ctr Invest Biodiversidade & Recursos Genet, CIBIO InBIO, Campus Vairao, P-4485661 Vairao, Portugal; 2.Univ Porto, Fac Ciencias, Dept Biol, Rua Campo Alegre S-N, P-4169007 Porto, Portugal; 3.Univ Johannesburg, Dept Zool, POB 534, ZA-2006 Auckland Pk, South Africa
推荐引用方式 GB/T 7714	Dilyte, Jolita,Sabatino, Stephen,Godinho, Raquel,et al. Diversification and gene flow of tilapia species driven by ecological changes in lowland and mountain areas of southern Mauritania[J],2020,34(1):133-146.
APA	Dilyte, Jolita,Sabatino, Stephen,Godinho, Raquel,&Brito, Jose Carlos.(2020).Diversification and gene flow of tilapia species driven by ecological changes in lowland and mountain areas of southern Mauritania.EVOLUTIONARY ECOLOGY,34(1),133-146.
MLA	Dilyte, Jolita,et al."Diversification and gene flow of tilapia species driven by ecological changes in lowland and mountain areas of southern Mauritania".EVOLUTIONARY ECOLOGY 34.1(2020):133-146.