ArticleFrontiers in plant science2025
Community evolution and phylogenetic structure of seed plants in Gansu, China.
Article in Frontiers in plant science, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Background: Understanding plant diversity is essential for revealing how species adapt and evolve across heterogeneous environments. Objectives: By integrating phylogenetics and ecology, this study aims to investigate species origins, evolutionary patterns, and biodiversity mechanisms of seed plants in Gansu Province, China. Methods: Using distribution data of seed plants, we analyzed spatial patterns, phylogenetic diversity, community structure, and floristic relationships. Results: The seed plant flora of Gansu has diverse temporal origins: 53.85% post-Miocene (0.3-23 Ma), 38.11% Paleogene (23.03-66 Ma), and 8.01% pre-Cretaceous (>66 Ma). The median diversification time is 19.61 Ma; the mean divergence time (MDT) is 28.17 ±25.65 Ma. Species richness (SR) and phylogenetic diversity (PD) are strongly correlated (P < 0.001), both showing a southeast-high to northwest-low pattern. SES-PD reveals phylogenetic overdispersion in 66 counties, suggesting migration corridors, while 14 southeastern counties show clustering due to environmental filtering. NRI and NTI analyses indicate competitive exclusion in 13 counties and environmental filtering in 55. Conclusion: This study highlights the evolutionary complexity and spatial heterogeneity of Gansu's plant diversity, offering insights into the ecological and historical drivers shaping plant community assembly in arid and montane regions.
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