Biodiv Sci ›› 0, Vol. ›› Issue (): 0-0.DOI: 10.17520/biods.2020246

   

Diversity patterns and effect factors of Ranunculaceae in eastern Eurasia

Yichao Li1,Yongsheng Chen2,Denis Sandanov3,Ao Luo1,Tong Lü1,Xiangyan Su1,Yunpeng Liu2,2,4,Qinggang Wang5,Viktor Chepinoga6,Sergey Dudov7,Wei Wang8,Zhiheng Wang9   

  1. 1. Institute of Ecology and Key Laboratory for Earth Surface Processes of the Ministry of Education, College of Urban and Environmental Sciences, Peking University
    2.
    3. Institute of General and Experimental Biology, Siberian Branch, Russian Academy of Sciences
    4. Peking University
    5. Department of Ecology and Ecological Engineering, College of Resources and Environmental Sciences, and Key Laboratory of Biodiversity and Organic Farming of Beijing City, China Agricultural University
    6. Institute of Geography, Siberian Branch, Russian Academy of Sciences
    7. Moscow State University
    8. State Key Laboratory of Systematic and Evolutionary Botany, Institute of Botany, Chinese Academy of Sciences
    9. College of Urban and Environmental Sciences, Peking University
  • Received:2020-06-15 Revised:2020-07-14 Online:2021-03-20 Published:2020-10-22
  • Contact: Zhiheng Wang

Abstract: Ranunculaceae, one of the basal clades in eudicots of angiosperms, has a variety of medicinal plants and is of high conservation value. However, large-scale patterns in species richness and phylogenetic diversity of Ranunculaceae based on high-resolution distribution data and their environmental determinants remain poorly understood. Here, we established the first species distribution database for 1688 Ranunculaceae species across eastern Eurasia by compiling distribution data from regional and local floral records from across their global range of China, Kazakhstan, Kyrgyzstan, Tajikistan, Turkmenistan, Uzbekistan, Mongolia, and Russia at a spatial resolution of 100 × 100 km2. Using this database, we mapped large-scale patterns in species richness and phylogenetic diversity for different life forms and explored the mechanisms underlying these patterns. We also quantified the relationship between species richness and phylogenetic diversity and identified hotspots of Ranunculaceae diversity. We found a latitudinal gradient in both species richness and phylogenetic diversity and revealed that Ranunculaceae in eastern Eurasia have particularly high levels of diversity in mountainous areas. Contemporary climate, habitat heterogeneity, and climate changes since the Last Glacial Maximum (LGM) all influenced spatial patterns in species richness and phylogenetic diversity, but their relative contributions varied across life forms. Phylogenetic diversity at mid and high latitudes was higher than expected when controlling for species richness, which suggests that these latitudes may represent a paleo-biodiversity hotspot of Ranunculaceae. Consequently, these regions should be considered a key conservation priority for this important family.

Key words: Ranunculaceae, herbaceous plants, woody plants, species diversity, phylogenetic diversity, hot spots