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Sci Rep. 2015 Oct 29;5:15823. doi: 10.1038/srep15823.

The role of East Asian monsoon system in shaping population divergence and dynamics of a constructive desert shrub Reaumuria soongarica.

Yin H1,2, Yan X1,3, Shi Y1,2, Qian C1,2, Li Z1,4, Zhang W1,5, Wang L1,5, Li Y5, Li X6, Chen G1, Li X1,7, Nevo E8, Ma XF1.

Author information

1
Key Laboratory of Stress Physiology and Ecology in Cold and Arid Regions, Gansu Province, Department of Ecology and Agriculture Research, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, Gansu, China.
2
University of Chinese Academy of Sciences, Beijing 100049, China.
3
Key Laboratory of Eco-hydrology and of Inland River Basin, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, Gansu, China.
4
Northwest university, Xi'an 710075, Shanxi, China.
5
College of Forestry Science, Gansu Agricultural University, Lanzhou 730000, Gansu, China.
6
Key Lab of Desert and Desertification, Cold and Arid Regions Environmental and Engineering Research Institute of Chinese Academy of Sciences, Lanzhou 730000, Gansu, China.
7
Shapotou Desert Research and Experiment Station, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, Gansu, China.
8
Institute of Evolution, University of Haifa, Haifa 31905, Israel.

Abstract

Both of the uplift of Qinghai-Tibet Plateau (QTP) and the development of East Asian monsoon system (EAMS) could have comprehensively impacted the formation and evolution of Arid Central Asia (ACA). To understand how desert plants endemic to ACA responded to these two factors, we profiled the historical population dynamics and distribution range shift of a constructive desert shrub Reaumuria soongarica (Tamaricaceae) based on species wide investigation of sequence variation of chloroplast DNA and nuclear ribosomal ITS. Phylogenetic analysis uncovered a deep divergence occurring at ca. 2.96 Mya between the western and eastern lineages of R. soongarica, and ecological niche modeling analysis strongly supported that the monsoonal climate could have fragmented its habitats in both glacial and interglacial periods and impelled its intraspecific divergence. Additionally, the population from the east monsoonal zone expanded rapidly, suggesting that the local monsoonal climate significantly impacted its population dynamics. The isolation by distance tests supported strong maternal gene flow along the direction of the East Asian winter monsoon, whose intensification induced the genetic admixture along the latitudinal populations of R. soongarica. Our results presented a new case that the development of EAMS had prominently impacted the intraspecific divergence and population dynamics of this desert plant.

PMID:
26510579
PMCID:
PMC4625182
DOI:
10.1038/srep15823
[Indexed for MEDLINE]
Free PMC Article

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