Data from: The spatial structure of phylogenetic and functional diversity in the United States and Canada: an example using the sedge family (Cyperaceae)
Spalink, Daniel, University of Utah, University of Wisconsin-Madison
Pender, Jocelyn, University of Wisconsin-Madison
Escudero, Marcial, University of Seville
Hipp, Andrew L., Field Museum of Natural History
Roalson, Eric H., Washington State University
Starr, Julian R., University of Ottawa
Waterway, Marcia J., McGill University
Bohs, Lynn, University of Utah
Sytsma, Kenneth J., University of Wisconsin-Madison
Published May 17, 2018 on Dryad.
Cite this dataset
Spalink, Daniel et al. (2018). Data from: The spatial structure of phylogenetic and functional diversity in the United States and Canada: an example using the sedge family (Cyperaceae) [Dataset]. Dryad. https://doi.org/10.5061/dryad.3d8332h
Systematically quantifying diversity across landscapes is necessary to understand how clade history and ecological heterogeneity contribute to the origin, distribution, and maintenance of biodiversity. Here, we chart the spatial structure of diversity among all species in the sedge family (Cyperaceae) throughout the USA and Canada. We first identify areas of remarkable species richness, phylogenetic diversity, and functional trait diversity, and highlight regions of conservation priority. We then test predictions about the spatial structure of this diversity based on the historical biogeography of the family. Incorporating a phylogeny, over 400,000 herbarium records, and a database of functional traits mined from online floras, we find that species richness and functional trait diversity peak in the Northeastern USA, while phylogenetic diversity peaks along the Gulf of Mexico. Floristic turnover among assemblages increases significantly with distance, but phylogenetic turnover is twice as rapid along latitudinal gradients as along longitudinal gradients. These patterns reflect the expected distribution of Cyperaceae, which originated in the tropics but radiated in temperate regions. We identify assemblages with an abundance of rare, range-restricted lineages, and assemblages composed of species generally lacking from diverse regions. We argue that both of these metrics are useful for developing targeted conservation strategies. We use the data generated here to establish future research priorities, including the testing of a series of hypotheses regarding the distribution of chromosome numbers, photosynthetic pathways, and resource partitioning in sedges.
Phylogeny of North American Cyperaceae
National Science Foundation, Award: DEB-131153, DOB-1046355, DEB-1457366, DEB-1255901, DEB-1256033