Data and appendices for "Hardscape floristics: Functional and phylogenetic diversity of parking-lot plants"

Questions: The study of organisms living in extreme environments has shaped our knowledge of the deterministic and stochastic factors that contribute to community assembly. With hardscape habitats (HH), humans have created a novel land-cover type that is physically analogous to extreme terrestrial environments such as deserts, barrens, and rocky outcrops and may harbor rare or specialist species and communities. We addressed the following questions: (a) which plant species inhabit hardscapes; (b) do hardscapes serve as a refuge for rare or specialist species; (c) how taxonomically similar are hardscape plant communities to one another and the regional species pool; (d) is phylogenetic diversity of hardscape communities different from that of the regional species pool; and (e) which functional traits and life history strategies are filtered for or against in hardscape plant communities?