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globalchange > 过去全球变化的重建

DOI:	10.1371/journal.pone.0140344
论文题名:	Genetic Variability and Structuring of Arctic Charr (Salvelinus alpinus) Populations in Northern Fennoscandia
作者:	Takahito Shikano; Antero Järvinen; Paula Marjamäki; Kimmo K. Kahilainen; Juha Merilä
刊名:	PLOS ONE
ISSN:	1932-6203
出版年:	2015
发表日期:	2015-10-15
卷:	10, 期:10
语种:	英语
英文关键词:	Population genetics ; Lakes ; Genetic polymorphism ; Effective population size ; Phylogeography ; Ponds ; Genetic loci ; Gene flow
英文摘要:	Variation in presumably neutral genetic markers can inform us about evolvability, historical effective population sizes and phylogeographic history of contemporary populations. We studied genetic variability in 15 microsatellite loci in six native landlocked Arctic charr (Salvelinus alpinus) populations in northern Fennoscandia, where this species is considered near threatened. We discovered that all populations were genetically highly (mean FST ≈ 0.26) differentiated and isolated from each other. Evidence was found for historical, but not for recent population size bottlenecks. Estimates of contemporary effective population size (Ne) ranged from seven to 228 and were significantly correlated with those of historical Ne but not with lake size. A census size (NC) was estimated to be approximately 300 individuals in a pond (0.14 ha), which exhibited the smallest Ne (i.e. Ne/NC = 0.02). Genetic variability in this pond and a connected lake is severely reduced, and both genetic and empirical estimates of migration rates indicate a lack of gene flow between them. Hence, albeit currently thriving, some northern Fennoscandian populations appear to be vulnerable to further loss of genetic variability and are likely to have limited capacity to adapt if selection pressures change.
URL:	http://journals.plos.org/plosone/article/file?id=10.1371/journal.pone.0140344&type=printable
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资源类型:	期刊论文
标识符:	http://119.78.100.158/handle/2HF3EXSE/21075
Appears in Collections:	过去全球变化的重建影响、适应和脆弱性科学计划与规划气候变化与战略全球变化的国际研究计划气候减缓与适应气候变化事实与影响

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File Name/ File Size	Content Type	Version	Access	License
journal.pone.0140344.PDF（1220KB）	期刊论文	作者接受稿	开放获取	CC BY-NC-SA	View Download

作者单位:

Ecological Genetics Research Unit, Department of Biosciences, University of Helsinki, Helsinki, Finland;Kilpisjärvi Biological Station, University of Helsinki, Kilpisjärvi, Finland;Ecological Genetics Research Unit, Department of Biosciences, University of Helsinki, Helsinki, Finland;Kilpisjärvi Biological Station, University of Helsinki, Kilpisjärvi, Finland;Department of Environmental Sciences, University of Helsinki, Helsinki, Finland;Ecological Genetics Research Unit, Department of Biosciences, University of Helsinki, Helsinki, Finland

Recommended Citation:

Takahito Shikano,Antero Järvinen,Paula Marjamäki,et al. Genetic Variability and Structuring of Arctic Charr (Salvelinus alpinus) Populations in Northern Fennoscandia[J]. PLOS ONE,2015-01-01,10(10)

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