Biodiversity Science ›› 2017, Vol. 25 ›› Issue (2): 195-203.doi: 10.17520/biods.2016001

• Orginal Article • Previous Article     Next Article

Phylofloristics: a case study from Yunnan, China

Rong Li(), Hang Sun   

  1. Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201
  • Received:2016-01-03 Accepted:2016-03-28 Online:2017-03-06

Traditional attempts of floristic studies typically focus on the analyses of taxonomic composition and areal-types of flora, often ignoring the rich context that evolutionary history can provide. In this study, based on the recent study examining the delineation of floristic regions in Yunnan, by combining data on the distributions and phylogenetic relationships of 1,983 genera of native seed plants, we explore how taxonomic composition, phylogenetic relatedness, and phylogenetic structure vary across the different geographic regions in this area. As predicted, phylogenetic diversity was well correlated with taxonomic diversity among the geographic regions. Using null model analyses, we found evidence of nonrandom phylogenetic structure across the region. Also, phylogenetic relatedness was well correlated with taxonomic composition between geographic regions in Yunnan. Cluster analyses of the similarities of phylogenetic relatedness and taxonomic composition show that geographic regions with tropical floristic affinity form a single cluster separate from another cluster composed of geographic regions with temperate floristic affinity. Our results show that the integration of phylogenetic information can help us to better understand the characteristics and origin of flora.

Key words: taxonomic composition, phylogenetic diversity, phylogenetic relatedness, phylogenetic structure, biogeography

Fig. 1

The delineation of eight floristic regions in Yunnan, China (adopted from Li et al, 2015a)"

Fig. 2

The mega-phylogeny of seed plants in Yunnan"

Table 1

Comparison of taxonomic diversity and phylogenetic diversity of different geographic regions for the seed plants in Yunnan"

I 180 1,226 134,237.26
II 149 725 82,676.45
III 176 990 112,736.74
IV 165 902 103,039.67
V 160 875 97,805.24
VI 126 520 63,362.67
VII 204 1,405 154,165.33
VIII 205 1,429 156,662.31

Fig. 3

Relationships between phylogenetic diversity and family richness (a) or genus richness (b) among the floristic regions in Yunnan. I-VIII indicate different floristic regions as in Fig. 1."

Table 2

Phylogenetic structure of different geographic regions for the seed plants in Yunnan"

Geographic regions
Net relatedness index
Phylogenetic structure
I 0.60 聚集型 Underdispersed
II 0.05 聚集型 Underdispersed
III -1.20 离散型 Overdispersed
IV 0.81 聚集型 Underdispersed
V 0.02 聚集型 Underdispersed
VI 1.01 聚集型 Underdispersed
VII 1.35 聚集型 Underdispersed
VIII 1.00 聚集型 Underdispersed

Fig. 4

A cluster dendrogram representing the taxonomic floristic similarity (a) and the phylofloristic similarity (b) between the geographic regions of Yunnan. I-VIII indicate different floristic regions as in Fig. 1."

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