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Identifying long-term stable refugia for relict plant species in East Asia.

ABSTRACT: Today East Asia harbors many "relict" plant species whose ranges were much larger during the Paleogene-Neogene and earlier. The ecological and climatic conditions suitable for these relict species have not been identified. Here, we map the abundance and distribution patterns of relict species, showing high abundance in the humid subtropical/warm-temperate forest regions. We further use Ecological Niche Modeling to show that these patterns align with maps of climate refugia, and we predict species' chances of persistence given the future climatic changes expected for East Asia. By 2070, potentially suitable areas with high richness of relict species will decrease, although the areas as a whole will probably expand. We identify areas in southwestern China and northern Vietnam as long-term climatically stable refugia likely to preserve ancient lineages, highlighting areas that could be prioritized for conservation of such species.

SUBMITTER: Tang CQ

PROVIDER: S-EPMC6203703 | biostudies-literature | 2018 Oct

REPOSITORIES: biostudies-literature

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Identifying long-term stable refugia for relict plant species in East Asia.

Tang Cindy Q CQ Matsui Tetsuya T Ohashi Haruka H Dong Yi-Fei YF Momohara Arata A Herrando-Moraira Sonia S Qian Shenhua S Yang Yongchuan Y Ohsawa Masahiko M Luu Hong Truong HT Grote Paul J PJ Krestov Pavel V PV Ben LePage Werger Marinus M Robertson Kevin K Hobohm Carsten C Wang Chong-Yun CY Peng Ming-Chun MC Chen Xi X Wang Huan-Chong HC Su Wen-Hua WH Zhou Rui R Li Shuaifeng S He Long-Yuan LY Yan Kai K Zhu Ming-Yuan MY Hu Jun J Yang Ruo-Han RH Li Wang-Jun WJ Tomita Mizuki M Wu Zhao-Lu ZL Yan Hai-Zhong HZ Zhang Guang-Fei GF He Hai H Yi Si-Rong SR Gong Hede H Song Kun K Song Ding D Li Xiao-Shuang XS Zhang Zhi-Ying ZY Han Peng-Bin PB Shen Li-Qin LQ Huang Diao-Shun DS Luo Kang K López-Pujol Jordi J

Nature communications 20181026 1

Today East Asia harbors many "relict" plant species whose ranges were much larger during the Paleogene-Neogene and earlier. The ecological and climatic conditions suitable for these relict species have not been identified. Here, we map the abundance and distribution patterns of relict species, showing high abundance in the humid subtropical/warm-temperate forest regions. We further use Ecological Niche Modeling to show that these patterns align with maps of climate refugia, and we predict specie ...[more]

PMID: 30367062

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Project description:Isolation by spatial distance (IBD), environment (IBE), and historical climatic instability (IBI) are three common processes assessed in phylogeographic and/or landscape genetic studies. However, the relative contributions of these three processes with respect to spatial genetic patterns have seldom been compared. Moreover, whether the relative contribution differs in different regions or when assessed using different genetic markers has rarely been reported. Lindera obtusiloba has been found to have two sister genetic clades of chloroplast (cpDNA) and nuclear microsatellite (nSSR), both of which show discontinuous distribution in northern and southern East Asia. In this study, we used the Mantel test and multiple matrix regression with randomization (MMRR) to determine the relative contributions of IBD, IBE, and IBI with respect to L. obtusiloba populations. Independent Mantel tests and MMRR calculations were conducted for two genetic data sets (cpDNA and nSSR) and for different regions (the overall species range, and northern and southern subregions of the range). We found a significant IBI pattern in nSSR divergence for all assessed regions, whereas no clear IBI pattern was detected with respect to cpDNA. In contrast, significant (or marginal) divergent IBD patterns were detected for cpDNA in all regions, whereas although a significant IBE was apparent with respect to the overall range, the effect was not detected in the two subregions. The differences identified in nSSR and cpDNA population divergence may be related to differences in the heredity and ploidy of the markers. Compared with the southern region, the northern region showed less significant correlation patterns, which may be related to the shorter population history and restricted population range. The findings of this study serve to illustrate that comparing between markers or regions can contribute to gaining a better understanding the population histories of different genomes or within different regions of a species' range.

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Dataset Information

Identifying long-term stable refugia for relict plant species in East Asia.

Publications

Identifying long-term stable refugia for relict plant species in East Asia.

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