7 Works

Pronounced genetic separation among varieties of the Primula cusickiana species complex, a Great Basin endemic

Austin Koontz, William Pearse & Paul Wolf
Distinguishing between populations with strong genetic structure and unique species is a common challenge in systematics, especially for taxa occurring in fragmented habitats where allopatric speciation may be widespread and distinct groups may be morphologically similar. Such is often the case with species complexes across sky island environments. In these scenarios, biogeography may help to explain the taxonomic relations between species complex members, and restriction site-associated DNA (RAD) sequencing methods are commonly used to compare...

The invasion paradox dissolves when using phylogenetic and temporal perspectives

Adrienne Ernst, Rebecca Barak, Andrew Hipp, Andrea Kramer, Hannah Marx & Daniel Larkin
1. Elton’s prediction that higher biodiversity leads to denser niche-packing and thus higher community resistance to invasion has long been studied, with species richness as the predominant measure of diversity. However, few studies have explored how phylogenetic and functional diversity, which should represent niche space more faithfully than taxonomic diversity, influence community invasibility, especially across longer time frames and over larger spatial extents. 2. We used a 15-year, 150-site grassland dataset to assess relationships between...

Even more oak species in Mexico? Genetic structure and morphological differentiation support the presence of at least two specific entities within Quercus laeta

Saddan Morales-Saldaña, Ken Oyama, Susana Valencia Ávalos, Efraín Tovar Sánchez, Andrew Hipp & Antonio González Rodríguez
Differentiation among populations, sometimes despite ongoing gene exchange, is a key step in speciation. Therefore, comparison of intra- and interspecific differentiation patterns is of great significance to understanding speciation. The genus Quercus is an interesting system to test speciation models in the presence of gene flow, due to its weak interspecific reproductive barriers. The aim of the present study was to characterize the degree and pattern of morphological and genetic differentiation among different morphotypes in...

Selection on convergent functional traits drives compositional divergence in a tallgrass prairie restoration experiment

Nisa Karimi & Andrew Hipp
1. Plant biodiversity is often partitioned into taxonomic diversity (species composition and abundance), phylogenetic diversity (breadth of evolutionary lineages) and functional diversity (resource‐use strategies or physical traits). Evaluating the effects and interplay of these dimensions can provide insights into how assembly processes drive compositional changes in plant communities. However, teasing apart the effects of different biodiversity dimensions is challenging in observational studies or retrospective analyses. 2. To evaluate how plant phylogenetic and trait history shape...

Paralogs and off-target sequences improve phylogenetic resolution in a densely-sampled study of the breadfruit genus (Artocarpus, Moraceae)

Elliot Gardner, Matthew Johnson, Joan Pereira, Aida Shafreena Ahmad Puad, Deby Arifiani, Sahromi Sahromi, Norman Wickett & Nyree Zerega
We present a 517-gene phylogenetic framework for the breadfruit genus Artocarpus (ca. 70 spp., Moraceae), making use of silica-dried leaves from recent fieldwork and herbarium specimens (some up to 106 years old) to achieve 96% taxon sampling. We explore issues relating to assembly, paralogous loci, partitions, and analysis method to reconstruct a phylogeny that is robust to variation in data and available tools. While codon partitioning did not result in any substantial topological differences, the...

Species packing and the latitudinal gradient in local beta-diversity

Ke Cao, Richard Condit, Xiangcheng Mi, Lei Chen, Wubing Xu, David F. R. P. Burslem, Chunrong Cai, Min Cao, Li-Wan Chang, Chengjin Chu, Hu Du, Sisira Ediriweera, C. S. V. Gunatilleke, I. U. A. N. Gunatilleke, Zhanqing Hao, Jinbo Li, Guangze Jin, Buhang Li, Yankun Liu, Yide Li, Michael J. O'Brien, Xiujuan Qiao, Hongwei Ni, Guochun Shen, Xihua Wang … & Jens-Christian Svenning
The decline in species richness at higher latitudes is among the most fundamental patterns in ecology. Whether changes in species composition across space (beta-diversity) contribute to this gradient of overall local species richness (gamma diversity) remains hotly debated. Previous studies that failed to resolve the issue suffered from a well-known tendency for small samples in areas with high gamma-diversity to have inflated measures of beta-diversity. We provide here a novel analytical test, using beta-diversity metrics...

Phylogeny, biogeography, and classification of the elms (Ulmus)

Andrew Hipp, Alan Whittemore, Ryan S. Fuller, Bethany H. Brown, Marlene Hahn, Linus Gog & Jaime A. Weber
A RAD-seq phylogeny is presented for the genus Ulmus, and a revised infrageneric classification is given, with keys, descriptions, and range maps for the subgenera and sections. The previously accepted classification was based on a cpDNA phylogeny, but several well-marked clades in the chloroplast phylogeny are not recovered in the RAD-seq phylogeny and do not seem to represent valid clades in the organismal phylogeny. Ordination and STRUCTURE analysis support a broad species concept in Ulmus...

Registration Year

  • 2021

Resource Types

  • Dataset


  • Morton Arboretum
  • Northwestern University
  • Sun Yat-sen University
  • Zhejiang University
  • Guangxi Institute of Botany
  • Heilongjiang Academy of Sciences
  • National Sun Yat-sen University
  • National Dong Hwa University
  • University of Aberdeen
  • University of Minnesota