Former Soltis Lab member. 🐊 Once gator, always gator! 🐊
I have a keen passion for applying phylogenetic tree as a pivotal framework attempting to solve some fundamental issues in biology. Phylogenetic tree is a crucial reference system for biological research. It captures evolutionary relationships among species, linking all the biological data together with an evolutionary context, serving as the biological “Periodic Table”.
My research interests are:
Building and using large-scale phylogenetic trees to explore the evolutionary and/or ecological patterns with spatial and/or paleoclimate data. E.g., some works have done for rosids and PhyloSynth.
Investigating the phylogenetic incongruence among data partitions, and deciphering its potential evolutionary cause
Studying taxonomy, phylogeny, biogeography, origin and dispersal for a focal clade (e.g., Elaeagnus)
When NOT struggling for existence, I occasionally do some coding!!
PhD in Botany, 2014
Institute of Botany, Chinese Academy of Sciences
MS in Botany, 2009
Institute of Botany, Chinese Academy of Sciences
BS in Environmental Science, 2006
Beijing Forestry University
I am Certified Instructor of The Carpentries (a non-profit organization, aiming to teach foundational coding and data science skills to researchers worldwide). I’m aslo an ex-board member of UF Carpentries Club. Here are some workshop stats that summerize the numbers of workshops we organized and the numbers of people that we trained.
Dec. 2: Giving a research talk in Wuhan Botanical Garden, CAS: Explore the Angiosperm diversity using the Tree of Life and biological big data
Sept. 6: Séminaire AMAP: Explore Biodiversity Using Big Data and Tree of Life
Conflicting relationships have been found between diversification rate and temperature across disparate clades of life. Here, we use a supermatrix comprising nearly 20,000 species of rosids—a clade of ~25% of all angiosperm species—to understand global patterns of diversification and its climatic association. Our approach incorporates historical global temperature, assessment of species’ temperature niche, and two broad-scale characterizations of tropical versus non-tropical niche occupancy. We find the diversification rates of most subclades dramatically increased over the last 15 million years (Myr) during cooling associated with global expansion of temperate habitats. Climatic niche is negatively associated with diversification rates, with tropical rosids forming older communities and experiencing speciation rates ~2-fold below rosids in cooler climates. Our results suggest long-term cooling had a disproportionate effect on non-tropical diversification rates, leading to dynamic young communities outside of the tropics, while relative stability in tropical climes led to older, slower-evolving but still species-rich communities.
High species diversity may result from recent rapid speciation in a ‘cradle’ and/or the gradual accumulation and preservation of species over time in a ‘museum’. China harbours nearly 10% of angiosperm species worldwide and has long been considered as both a museum, owing to the presence of many species with hypothesized ancient origins, and a cradle, as many lineages have originated as recent topographic changes and climatic shifts—such as the formation of the Qinghai–Tibetan Plateau and the development of the monsoon—provided new habitats that promoted remarkable radiation. However, no detailed phylogenetic study has addressed when and how the major components of the Chinese angiosperm flora assembled to form the present-day vegetation. Here we investigate the spatio-temporal divergence patterns of the Chinese flora using a dated phylogeny of 92% of the angiosperm genera for the region, a nearly complete species-level tree comprising 26,978 species and detailed spatial distribution data. We found that 66% of the angiosperm genera in China did not originate until early in the Miocene epoch (23 million years ago (Mya)). The flora of eastern China bears a signature of older divergence (mean divergence times of 22.04–25.39 Mya), phylogenetic overdispersion (spatial co-occurrence of distant relatives) and higher phylogenetic diversity. In western China, the flora shows more recent divergence (mean divergence times of 15.29–18.86 Mya), pronounced phylogenetic clustering (co-occurrence of close relatives) and lower phylogenetic diversity. Analyses of species-level phylogenetic diversity using simulated branch lengths yielded results similar to genus-level patterns. Our analyses indicate that eastern China represents a floristic museum, and western China an evolutionary cradle, for herbaceous genera; eastern China has served as both a museum and a cradle for woody genera. These results identify areas of high species richness and phylogenetic diversity, and provide a foundation on which to build conservation efforts in China.