Plant Diversity ›› 2023, Vol. 45 ›› Issue (02): 177-184.DOI: 10.1016/j.pld.2022.12.006

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Geographic patterns of taxonomic and phylogenetic β-diversity of aquatic angiosperms in China

Ya-Dong Zhoua, Hong Qianb, Yi Jinc, Ke-Yan Xiaod, Xue Yand,e, Qing-Feng Wangd,e   

  1. a. School of Life Sciences, Nanchang University, Nanchang 330031, Jiangxi, China;
    b. Research and Collections Center, Illinois State Museum, Springfield, Illinois, USA;
    c. Key Laboratory of National Forestry and Grassland Administration on Biodiversity Conservation in Karst Mountainous Areas of Southwestern China, Guizhou Normal University, Guiyang, 550025, China;
    d. Wuhan Botanical Garden/Core Botanical Gardens, Chinese Academy of Sciences, Wuhan 430074, Hubei, China;
    e. Sino-Africa Joint Research Center (SAJOREC), Chinese Academy of Sciences, Wuhan 430074, Hubei, China
  • Received:2022-06-18 Revised:2022-12-12 Online:2023-03-25 Published:2023-06-13
  • Contact: Ya-Dong Zhou,E-mail:ydzhou@ncu.edu.cn;Qing-Feng Wang,E-mail:qfwang@wbgcas.cn
  • Supported by:
    This study was supported by the Second Tibetan Plateau Scientific Expedition and Research (STEP) Program (2019QZKK0502), and the National Science Foundation of China (32260046).

Abstract: China covers a vast territory harbouring a large number of aquatic plants. Although there are many studies on the β-diversity of total, herbaceous or woody plants in China and elsewhere, few studies have focused on aquatic plants. Here, we analyse a comprehensive data set of 889 aquatic angiosperm species in China, and explore the geographic patterns and climatic correlates of total taxonomic and phylogenetic β-diversity as well as their turnover and nestedness components. Our results show that geographic patterns of taxonomic and phylogenetic β-diversity are highly congruent for aquatic angiosperms, and taxonomic β-diversity is consistently higher than phylogenetic β-diversity. The ratio between the nestedness component and total β-diversity is high in northwestern China and low in southeastern China. The geographic patterns of taxonomic and phylogenetic β-diversity of aquatic angiosperms in China are obviously affected by geographic and climatic distances, respectively. In conclusion, the geographic patterns of taxonomic and phylogenetic β-diversity of aquatic angiosperms are consistent across China. Climatic and geographic distances jointly affect the geographic patterns of β-diversity of aquatic angiosperms. Overall, our work provides insight into understanding the large-scale patterns of aquatic angiosperm β-diversity, and is a critical addition to previous studies on the macroecological patterns of terrestrial organisms.

Key words: Freshwater plants, β-diversity, Phylogenetic metric, Geographic pattern, Climate