气候变化领域集成服务门户(CCPortal): Understanding genetic diversity of relict forests. Linking long-term isolation legacies and current habitat fragmentation in Abies pinsapo Boiss

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DOI	10.1016/j.foreco.2020.117947
	Understanding genetic diversity of relict forests. Linking long-term isolation legacies and current habitat fragmentation in Abies pinsapo Boiss
	Cobo-Simón I.; Méndez-Cea B.; Jump A.S.; Seco J.; Gallego F.J.; Linares J.C.
发表日期	2020
ISSN	0378-1127
卷号	461
英文摘要	Increasing variability and uncertainty regarding future climate provide new challenges for the conservation of endangered tree species. For example, threat status can be impacted by genetic diversity, where forest trees show reduced geographic range size, isolated populations and fragmented distribution. We place the conservation insights of population genetic structure in a climate change context, using as experimental system a relict drought-sensitive fir (Abies pinsapo Boiss.). Nuclear (nSSR, ISSR) and chloroplast (cpSSR) markers were analysed to investigate the extent to that A. pinsapo evidences ongoing genetic erosion, isolation and divergent genetic diversity, among populations, elevations and cohorts (young, adult and old trees). We obtained contrasting patterns among chloroplast and nuclear markers. Based on cpSSRs, the highest genetic distances were found in the western portion of the distribution, while based on both nSSRs and ISSRs, differentiation appeared in the eastern portion of the distribution. Evidence for bottlenecks and genetic drift were found in all the studied populations, as well as low among-population genetic differentiation. Land use legacies e.g. impacting current forest structural diversity might be related to observed genetic diversity. No evidence of demographic genetic erosion among cohorts were found. Conservation efforts should focus on reducing the probability of occurrence of stochastic events such as fires and habitat loss due to human impacts or climate change to maximise A. pinsapo population sizes. Further research on adaptive potential should focus on identifying active genetic management strategies that might improve adaptation to future climates in such endangered relict species. © 2020 Elsevier B.V.
关键词	Biodiversity Chromosomes Conservation Ecosystems Erosion Forestry Land use Population statistics Stochastic systems Adaptive Management Circum-mediterranean firs Genetic differentiation Genetic diversity Microsatellite markers Population genetics Climate change adaptive management climate change conservation genetics endangered species genetic differentiation genetic drift genetic variation habitat fragmentation habitat loss strategic approach Biodiversity Chromosomes Conservation Ecosystems Erosion Forestry Abies Abies pinsapo
语种	英语
来源机构	Forest Ecology and Management
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/132973
推荐引用方式 GB/T 7714	Cobo-Simón I.,Méndez-Cea B.,Jump A.S.,et al. Understanding genetic diversity of relict forests. Linking long-term isolation legacies and current habitat fragmentation in Abies pinsapo Boiss[J]. Forest Ecology and Management,2020,461.
APA	Cobo-Simón I.,Méndez-Cea B.,Jump A.S.,Seco J.,Gallego F.J.,&Linares J.C..(2020).Understanding genetic diversity of relict forests. Linking long-term isolation legacies and current habitat fragmentation in Abies pinsapo Boiss.,461.
MLA	Cobo-Simón I.,et al."Understanding genetic diversity of relict forests. Linking long-term isolation legacies and current habitat fragmentation in Abies pinsapo Boiss".461(2020).