Details

Autor(en) / Beteiligte

• Guo, Xi‐Di
• Wang, Hong‐Fang
• Bao, Lei
• Wang, Tian‐Ming
• Bai, Wei‐Ning
• Ye, Jun‐Wei
• Ge, Jian‐Ping

Titel

Evolutionary history of a widespread tree species Acer mono in East Asia

Ist Teil von

• Ecology and evolution, 2014-11, Vol.4 (22), p.4332-4345

Ort / Verlag

England: John Wiley & Sons, Inc

Erscheinungsjahr

2014

Link zum Volltext

Quelle

Wiley Online Library

Beschreibungen/Notizen

• East Asia has the most diverse temperate flora in the world primarily due to the lack of Pleistocene glaciation and the geographic heterogeneity. Although increasing phylogeography studies in this region provided more proofs in this issue, discrepancies and uncertainty still exist, especially in northern temperate deciduous broad‐leaved and coniferous mixed forest region (II). And a widespread plant species could reduce the complexity to infer the relationship between diversity and physiographical pattern. Hence, we studied the evolution history of a widespread temperate tree, Acer mono, populations in region II and the influence of physiographic patterns on intraspecific genetic diversity. Analyses of chloroplast sequences and nuclear microsatellites indicated high levels of genetic diversity. The diversity distribution was spatially heterogeneous and a latitudinal cline existed in both markers. The spatial distribution pattern between genetic diversity within A. mono and the diversity at species level was generally consistent. Western subtropical evergreen broad‐leaved forest subregion (IVb) had a unique ancient chloroplast clade (CP3) and a nuclear gene pool (GP5) with dominance indicating the critical role of this area in species diversification. Genetic data and ecological niche model results both suggested that populations in region II disappeared during the last glacial maximum (LGM) and recovered from south of Changbai Mt. and the Korean Peninsula. Two distribution centers were likely during the LGM, one in the north edge of warm temperate deciduous broad‐leaved forest region (III) and another in the south edge of region III. This was reflected by the genetic pattern with two spatially independent genetic groups. This study highlights the key role of region III in sustaining genetic diversity in the northern range and connecting diversity between southern and northern range. We elucidated the diversity relationship between vegetation regions which could facilitate the understanding of biodiversity origin and maintenance in East Asia. The mixed coniferous‐deciduous forests of northeast Asia harbor high biodiversity within their latitudes and sustain abundant Tertiary relict species. The maple tree (Acer mono) is one of the Tertiary relict species found in these mixed forests. In this study, focusing on the demographic history of the maple tree, together with the few available phylogeographic analyses conducted in these mixed forests, we aimed to understand the history of the forests and the influence of climate change on the glacial cycles of the Pleistocene. And our study clearly demonstrates the migration history of the maple trees and indicates the possibility of using phylogeographic tools to elucidate the history of community assemblages.