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20. Global patterns and determinants of phylogenetic beta diversity among liverwort floras.

Author

Qian, Hong, Qian, Shenhua, Wang, Jian, and Kessler, Michael

Subjects
*LIVERWORTS, *CLIMATE change, *BRYOPHYTES, *BOTANY, *CONTINENTS
Abstract

Aim Location Taxon Methods Results Main Conclusions Investigating phylogenetic beta diversity, and its turnover and nestedness components, can shed light on the evolutionary causes shaping the similarity (or dissimilarity) in composition between biological assemblages. Liverworts are important constituents of most terrestrial ecosystems worldwide but studies on phylogenetic beta diversity in liverworts are scarce. Here, we explore geographic patterns of phylogenetic beta diversity and its two components in liverworts across the world and evaluate the relative importance of dispersal limitation and environmental filtering processes in shaping beta diversity patterns at different spatial extents by relating phylogenetic beta diversity or phylogenetic turnover to geographic and climatic distances.Global.Liverworts.We conducted correlation and regression analyses to relate phylogenetic beta diversity and its two components (turnover and nestedness) to six variables representing current climate conditions and two variables representing historical (Quaternary) climate change, and to geographic and climatic distances at different spatial extents (global, continental, and regional).We found that of the eight variables of current and historical climates considered, precipitation seasonality was the strongest determinant of phylogenetic beta diversity in liverworts. At the global extent, geographic and climatic distances explained similar amounts of the variation in phylogenetic turnover, whereas at the continental extent, climatic distance explained more variation than geographic distance in five of the seven continents, and at a regional extent (roughly a circle of 4000 km in diameter), geographic distances generally had a greater effect than climatic distance on phylogenetic turnover.We conclude that both dispersal limitation and environmental filtering played an important role in shaping phylogenetic structure of liverwort floras, but their relative importance varies at different spatial scales and among geographic regions. [ABSTRACT FROM AUTHOR]

Published
2024
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27. Effects of climate and environmental heterogeneity on the phylogenetic structure of regional angiosperm floras worldwide

Author

Qian, Hong; https://orcid.org/0000-0002-1381-7496, Qian, Shenhua; https://orcid.org/0000-0003-1565-8748, Zhang, Jian; https://orcid.org/0000-0003-0589-6267, Kessler, Michael; https://orcid.org/0000-0003-4612-9937, Qian, Hong; https://orcid.org/0000-0002-1381-7496, Qian, Shenhua; https://orcid.org/0000-0003-1565-8748, Zhang, Jian; https://orcid.org/0000-0003-0589-6267, and Kessler, Michael; https://orcid.org/0000-0003-4612-9937

Abstract

The tendency of species to retain ancestral ecological distributions (phylogenetic niche conservatism) is thought to influence which species from a species pool can persist in a particular environment. Thus, investigating the relationships between measures of phylogenetic structure and environmental variables at a global scale can help understand the variation in species richness and phylogenetic structure in biological assemblages across the world. Here, we analyze a comprehensive data set including 341,846 species in 391 angiosperm floras worldwide to explore the relationships between measures of phylogenetic structure and environmental variables for angiosperms in regional floras across the world and for each of individual continental (biogeographic) regions. We find that the global phylogenetic structure of angiosperms shows clear and meaningful relationships with environmental factors. Current climatic variables have the highest predictive power, especially on phylogenetic metrics reflecting recent evolutionary relationships that are also related to current environmental heterogeneity, presumably because this favors plant speciation in various ways. We also find evidence that past climatic conditions, and particularly refugial conditions, play an important role in determining the phylogenetic structure of regional floras. The relationships between environmental conditions and phylogenetic metrics differ between continents, reflecting the different evolutionary histories of their floras.

Published
2024

39. Angiosperm phylogenetic diversity is lower in Africa than South America

Author

Qian, Hong; https://orcid.org/0000-0002-1381-7496, Kessler, Michael; https://orcid.org/0000-0003-4612-9937, Zhang, Jian; https://orcid.org/0000-0003-0589-6267, Jin, Yi; https://orcid.org/0000-0003-4961-5172, Soltis, Douglas E; https://orcid.org/0000-0001-8638-4137, Qian, Shenhua, Zhou, Yadong; https://orcid.org/0000-0001-6886-0662, Soltis, Pamela S; https://orcid.org/0000-0001-9310-8659, Qian, Hong; https://orcid.org/0000-0002-1381-7496, Kessler, Michael; https://orcid.org/0000-0003-4612-9937, Zhang, Jian; https://orcid.org/0000-0003-0589-6267, Jin, Yi; https://orcid.org/0000-0003-4961-5172, Soltis, Douglas E; https://orcid.org/0000-0001-8638-4137, Qian, Shenhua, Zhou, Yadong; https://orcid.org/0000-0001-6886-0662, and Soltis, Pamela S; https://orcid.org/0000-0001-9310-8659

Abstract

Although originating from a common Gondwanan flora, the diversity and composition of the floras of Africa and South America have greatly diverged since continental breakup of Africa from South America now having much higher plant species richness. However, the phylogenetic diversity of the floras and what this tells us about their evolution remained unexplored. We show that for a given species richness and considering land surface area, topography, and present-day climate, angiosperm phylogenetic diversity in South America is higher than in Africa. This relationship holds regardless of whether all climatically matched areas or only matched areas in tropical climates are considered. Phylogenetic diversity is high relative to species richness in refugial areas in Africa and in northwestern South America, once the gateway for immigration from the north. While species richness is strongly influenced by massive plant radiations in South America, we detect a pervasive influence of historical processes on the phylogenetic diversity of both the South American and African floras.

Published
2023

41. Author Correction: Identifying long-term stable refugia for relict plant species in East Asia

Author

Tang, Cindy Q., Matsui, Tetsuya, Ohashi, Haruka, Dong, Yi-Fei, Momohara, Arata, Herrando-Moraira, Sonia, Qian, Shenhua, Yang, Yongchuan, Ohsawa, Masahiko, Luu, Hong Truong, Grote, Paul J., Krestov, Pavel V., LePage, Ben, Werger, Marinus, Robertson, Kevin, Hobohm, Carsten, Wang, Chong-Yun, Peng, Ming-Chun, Chen, Xi, Wang, Huan-Chong, Su, Wen-Hua, Zhou, Rui, Li, Shuaifeng, He, Long-Yuan, Yan, Kai, Zhu, Ming-Yuan, Hu, Jun, Yang, Ruo-Han, Li, Wang-Jun, Tomita, Mizuki, Wu, Zhao-Lu, Yan, Hai-Zhong, Zhang, Guang-Fei, He, Hai, Yi, Si-Rong, Gong, Hede, Song, Kun, Song, Ding, Li, Xiao-Shuang, Zhang, Zhi-Ying, Han, Peng-Bin, Shen, Li-Qin, Huang, Diao-Shun, Luo, Kang, and López-Pujol, Jordi

Published
2018
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42. Identifying long-term stable refugia for relict plant species in East Asia

Author

Tang, Cindy Q., Matsui, Tetsuya, Ohashi, Haruka, Dong, Yi-Fei, Momohara, Arata, Herrando-Moraira, Sonia, Qian, Shenhua, Yang, Yongchuan, Ohsawa, Masahiko, Luu, Hong Truong, Grote, Paul J., Krestov, Pavel V., Ben LePage, Werger, Marinus, Robertson, Kevin, Hobohm, Carsten, Wang, Chong-Yun, Peng, Ming-Chun, Chen, Xi, Wang, Huan-Chong, Su, Wen-Hua, Zhou, Rui, Li, Shuaifeng, He, Long-Yuan, Yan, Kai, Zhu, Ming-Yuan, Hu, Jun, Yang, Ruo-Han, Li, Wang-Jun, Tomita, Mizuki, Wu, Zhao-Lu, Yan, Hai-Zhong, Zhang, Guang-Fei, He, Hai, Yi, Si-Rong, Gong, Hede, Song, Kun, Song, Ding, Li, Xiao-Shuang, Zhang, Zhi-Ying, Han, Peng-Bin, Shen, Li-Qin, Huang, Diao-Shun, Luo, Kang, and López-Pujol, Jordi

Published
2018
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44. Fengshui forests as a conservation paradigm of the golden larch in China

Author

Zhou, Lihua, primary, Huang, Li, additional, Jin, Cheng, additional, Hu, Siwei, additional, Long, Yuxiao, additional, Qian, Shenhua, additional, Shang, Kankan, additional, Song, Kun, additional, Song, Yao-Bin, additional, Lin, Dunmei, additional, Zhao, Liang, additional, Momohara, Arata, additional, and Yang, Yongchuan, additional

Published
2022
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47. Effects of Elevation Gradient on Soil Carbon and Nitrogen in a Typical Karst Region of Chongqing, Southwest China

Author

Zhu, Guangyu, primary, Zhou, Lihua, additional, He, Xianjin, additional, Wei, Pei, additional, Lin, Dunmei, additional, Qian, Shenhua, additional, Zhao, Liang, additional, Luo, Min, additional, Yin, Xinhan, additional, Zeng, Lian, additional, Long, Yuxiao, additional, Hu, Siwei, additional, Ouyang, Xue, additional, and Yang, Yongchuan, additional

Published
2022
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49. Ecological niche modeling applied to the conservation of the East Asian relict endemism Glyptostrobus pensilis (Cupressaceae)

Author

Yunnan Province, Yunnan University, Ministry of Science and Technology of the People's Republic of China, Ministerio de Ciencia e Innovación (España), Environmental Restoration and Conservation Agency (Japan), Pueyo-Herrera, Paula, Tang, Cindy Q., Matsui, Tetsuya, Ohashi, Haruka, Qian, Shenhua, Yang, Yongchuan, Herrando Moraira, Sonia, Nualart, Neus, López-Pujol, Jordi, Yunnan Province, Yunnan University, Ministry of Science and Technology of the People's Republic of China, Ministerio de Ciencia e Innovación (España), Environmental Restoration and Conservation Agency (Japan), Pueyo-Herrera, Paula, Tang, Cindy Q., Matsui, Tetsuya, Ohashi, Haruka, Qian, Shenhua, Yang, Yongchuan, Herrando Moraira, Sonia, Nualart, Neus, and López-Pujol, Jordi

Abstract

Glyptostrobus pensilis (Cupressaceae) is the only surviving species of the genus Glyptostrobus. Although the species is widely cultivated throughout China, in the wild it only occurs as small stands in southeastern China, central Laos, and southern Vietnam. However, its low genetic variability, lack of recruitment, and the progressive destruction of its habitat caused by humans, have meant that the populations are showing a clear declining trend and the species as a whole is threatened. Ecological niche modeling is used here to study the present potential distribution, as well as in the future (2061–2080) using several global circulation models under two of the shared socioeconomic pathways (SSP 126 and SSP 585) that are being used to produce the IPCC Sixth Assessment Report. The current potential area of G. pensilis is of 1,452,481 km with the areas of greatest probability of presence located in southeastern China. This potential area is reduced for the future according to most models, with greater losses for the SSP 585 scenario. Between 6.9 and 31.3% of all wild populations of G. pensilis would be outside potential areas (including the Lao populations, which harbor the highest levels of genetic variability). Conservation measures include the expansion of the current network of protected areas (since over 90% of wild populations do not occur within them), the development of propagation techniques, and the carrying out of translocation activities that should require international collaboration among the countries in which the species is found. With the current knowledge, we have reassessed the threat status of the species under the IUCN criteria, downgrading it from CR to EN both for China and at global level.

Published
2022

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