Historical Dynamics of Semi-Humid Evergreen Forests in the Southeast Himalaya Biodiversity Hotspot: A Case Study of the Quercus franchetii Complex (Fagaceae)

The Oligocene and Miocene are key periods in the formation of the modern topography and flora of East Asian and Indo-China. However, it is unclear how geological and climatic factors contributed to the high endemism and species richness of this region. The Quercus franchetii complex is widespread in...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Si-Si Zheng, Xiao-Long Jiang, Qing-Jun Huang, Min Deng
Formato:	article
Lenguaje:	EN
Publicado:	Frontiers Media S.A. 2021
Materias:	population genetic structure ecological niche modeling Quercus section Ilex geoclimatic events phylogeography Plant culture SB1-1110
Acceso en línea:	https://doaj.org/article/485d91508df54d108d8eb050f9bac39e
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:485d91508df54d108d8eb050f9bac39e
record_format	dspace
spelling	oai:doaj.org-article:485d91508df54d108d8eb050f9bac39e2021-11-30T12:23:19ZHistorical Dynamics of Semi-Humid Evergreen Forests in the Southeast Himalaya Biodiversity Hotspot: A Case Study of the Quercus franchetii Complex (Fagaceae)1664-462X10.3389/fpls.2021.774232https://doaj.org/article/485d91508df54d108d8eb050f9bac39e2021-11-01T00:00:00Zhttps://www.frontiersin.org/articles/10.3389/fpls.2021.774232/fullhttps://doaj.org/toc/1664-462XThe Oligocene and Miocene are key periods in the formation of the modern topography and flora of East Asian and Indo-China. However, it is unclear how geological and climatic factors contributed to the high endemism and species richness of this region. The Quercus franchetii complex is widespread in the southeast Himalaya fringe and northern Indo-China with a long evolutionary history. It provides a unique proxy for studying the diversity pattern of evergreen woody lineages in this region since the Oligocene. In this study, we combined chloroplast (cpDNA) sequences, nuclear microsatellite loci (nSSRs), and species distribution modeling (SDM) to investigate the impacts of geological events on genetic diversity of the Q. franchetii complex. The results showed that the initial cpDNA haplotype divergence was estimated to occur during the middle Oligocene (30.7 Ma), which might have been raised by the tectonic activity at this episode to the Miocene. The nSSR results revealed two major groups of populations, the central Yunnan-Guizhou plateau (YGP) group and the peripheral distribution group when K = 2, in responding to the rapid YGP uplift during the late Miocene, which restricted gene flow between the populations in core and marginal areas. SDM analysis indicated that the distribution ranges of the Q. franchetii complex expanded northwards after the last glacial maximum, but the core distribution range in YGP was stable. Our results showed that the divergence of Q. franchetii complex is rooted in the mid-Oligocene. The early geological events during the Oligocene, and the late Miocene may play key roles to restrict seed-mediated gene flow among regions, but the pollen-mediated gene flow was less impacted. The uplifts of the YGP and the climate since LGM subsequently boosted the divergence of the populations in core and marginal areas.Si-Si ZhengSi-Si ZhengXiao-Long JiangQing-Jun HuangMin DengMin DengFrontiers Media S.A.articlepopulation genetic structureecological niche modelingQuercus section Ilexgeoclimatic eventsphylogeographyPlant cultureSB1-1110ENFrontiers in Plant Science, Vol 12 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	population genetic structure ecological niche modeling Quercus section Ilex geoclimatic events phylogeography Plant culture SB1-1110
spellingShingle	population genetic structure ecological niche modeling Quercus section Ilex geoclimatic events phylogeography Plant culture SB1-1110 Si-Si Zheng Si-Si Zheng Xiao-Long Jiang Qing-Jun Huang Min Deng Min Deng Historical Dynamics of Semi-Humid Evergreen Forests in the Southeast Himalaya Biodiversity Hotspot: A Case Study of the Quercus franchetii Complex (Fagaceae)
description	The Oligocene and Miocene are key periods in the formation of the modern topography and flora of East Asian and Indo-China. However, it is unclear how geological and climatic factors contributed to the high endemism and species richness of this region. The Quercus franchetii complex is widespread in the southeast Himalaya fringe and northern Indo-China with a long evolutionary history. It provides a unique proxy for studying the diversity pattern of evergreen woody lineages in this region since the Oligocene. In this study, we combined chloroplast (cpDNA) sequences, nuclear microsatellite loci (nSSRs), and species distribution modeling (SDM) to investigate the impacts of geological events on genetic diversity of the Q. franchetii complex. The results showed that the initial cpDNA haplotype divergence was estimated to occur during the middle Oligocene (30.7 Ma), which might have been raised by the tectonic activity at this episode to the Miocene. The nSSR results revealed two major groups of populations, the central Yunnan-Guizhou plateau (YGP) group and the peripheral distribution group when K = 2, in responding to the rapid YGP uplift during the late Miocene, which restricted gene flow between the populations in core and marginal areas. SDM analysis indicated that the distribution ranges of the Q. franchetii complex expanded northwards after the last glacial maximum, but the core distribution range in YGP was stable. Our results showed that the divergence of Q. franchetii complex is rooted in the mid-Oligocene. The early geological events during the Oligocene, and the late Miocene may play key roles to restrict seed-mediated gene flow among regions, but the pollen-mediated gene flow was less impacted. The uplifts of the YGP and the climate since LGM subsequently boosted the divergence of the populations in core and marginal areas.
format	article
author	Si-Si Zheng Si-Si Zheng Xiao-Long Jiang Qing-Jun Huang Min Deng Min Deng
author_facet	Si-Si Zheng Si-Si Zheng Xiao-Long Jiang Qing-Jun Huang Min Deng Min Deng
author_sort	Si-Si Zheng
title	Historical Dynamics of Semi-Humid Evergreen Forests in the Southeast Himalaya Biodiversity Hotspot: A Case Study of the Quercus franchetii Complex (Fagaceae)
title_short	Historical Dynamics of Semi-Humid Evergreen Forests in the Southeast Himalaya Biodiversity Hotspot: A Case Study of the Quercus franchetii Complex (Fagaceae)
title_full	Historical Dynamics of Semi-Humid Evergreen Forests in the Southeast Himalaya Biodiversity Hotspot: A Case Study of the Quercus franchetii Complex (Fagaceae)
title_fullStr	Historical Dynamics of Semi-Humid Evergreen Forests in the Southeast Himalaya Biodiversity Hotspot: A Case Study of the Quercus franchetii Complex (Fagaceae)
title_full_unstemmed	Historical Dynamics of Semi-Humid Evergreen Forests in the Southeast Himalaya Biodiversity Hotspot: A Case Study of the Quercus franchetii Complex (Fagaceae)
title_sort	historical dynamics of semi-humid evergreen forests in the southeast himalaya biodiversity hotspot: a case study of the quercus franchetii complex (fagaceae)
publisher	Frontiers Media S.A.
publishDate	2021
url	https://doaj.org/article/485d91508df54d108d8eb050f9bac39e
work_keys_str_mv	AT sisizheng historicaldynamicsofsemihumidevergreenforestsinthesoutheasthimalayabiodiversityhotspotacasestudyofthequercusfranchetiicomplexfagaceae AT sisizheng historicaldynamicsofsemihumidevergreenforestsinthesoutheasthimalayabiodiversityhotspotacasestudyofthequercusfranchetiicomplexfagaceae AT xiaolongjiang historicaldynamicsofsemihumidevergreenforestsinthesoutheasthimalayabiodiversityhotspotacasestudyofthequercusfranchetiicomplexfagaceae AT qingjunhuang historicaldynamicsofsemihumidevergreenforestsinthesoutheasthimalayabiodiversityhotspotacasestudyofthequercusfranchetiicomplexfagaceae AT mindeng historicaldynamicsofsemihumidevergreenforestsinthesoutheasthimalayabiodiversityhotspotacasestudyofthequercusfranchetiicomplexfagaceae AT mindeng historicaldynamicsofsemihumidevergreenforestsinthesoutheasthimalayabiodiversityhotspotacasestudyofthequercusfranchetiicomplexfagaceae
_version_	1718406618641596416

Historical Dynamics of Semi-Humid Evergreen Forests in the Southeast Himalaya Biodiversity Hotspot: A Case Study of the Quercus franchetii Complex (Fagaceae)

Ejemplares similares