3 Works

Data from: Pleistocene speciation in the genus Populus (Salicaceae)

Nicholas D. Levsen, Peter Tiffin & Matthew S. Olson
The macro-evolutionary consequences of recent climate change remain controversial and there is little paleobotanical or morphological evidence that Pleistocene (1.8-0.12 Ma) glacial cycles acted as drivers of speciation, especially among lineages with long generation times, such as trees. We combined genetic and ecogeographic data from two closely related North American tree species, Populus balsamifera and P. trichocarpa (Salicacaeae) to determine if their divergence coincided with and was possibly caused by Pleistocene climatic events. We analyzed...

Data from: Does a facultative mutualism limit species range expansion?

John Stanton-Geddes & Carolyn G. Anderson
The availability and quality of mutualists beyond a species’ range edge may limit range expansion. With the legume Chamaecrista fasciculata, we asked to what extent the availability and quality of rhizobia beyond the range edge limits host range expansion. We tested the effect of rhizobia availability on plant growth by transplanting seed from three locations into five sites spanning C. fasciculata’s range (interior, at the northern and western range edges, and beyond the range edges),...

Data from: Insects on plants: explaining the paradox of low diversity within specialist herbivore guilds

Vojtech Novotny, Scott E. Miller, Jan Hrcek, Leontine Baje, Yves Basset, Owen T. Lewis, Alan J. A. Stewart & George D. Weiblen
Classical niche theory explains the coexistence of species through their exploitation of different resources. Assemblages of herbivores coexisting on a particular plant species are thus expected to be dominated by species from host-specific guilds with narrow, coexistence-facilitating niches, rather than by species from generalist guilds. Exactly the opposite pattern is observed for folivores feeding on trees in New Guinea. The least specialized mobile chewers were most species-rich, followed by the moderately specialized semi-concealed and exposed...

Registration Year

  • 2011
    3

Resource Types

  • Dataset
    3

Affiliations

  • University of Minnesota
    3
  • University of Sussex
    1
  • University of Alaska Fairbanks
    1
  • Smithsonian Institution
    1
  • New Guinea Binatang Research Center
    1
  • University of South Bohemia in České Budějovice
    1
  • Smithsonian Tropical Research Institute
    1
  • Texas Tech University
    1
  • University of Oxford
    1
  • University of California, Davis
    1