• A diversity of biogeographies in an extreme Amazonian wetland habitat

      Householder, Ethan; Janovec, John; Tobler, Mathias W.; Wittmann, Florian; Myster, Randall W. (John Wiley & Sons, Ltd, 2017)
      Amazonian wetlands are associated with lower species diversity relative to surrounding terra firme forests, as well as compositional turnover along strong hydro-edaphic gradients. Because species differ in their ecophysiological response to soil waterlogging, hydrological regime is likely a major determinant of the local diversity, species distribution and assemblage of plant communities in wetland habitats....
    • Montane bias in lowland Amazonian peatlands: Plant assembly on heterogeneous landscapes and potential significance to palynological inference

      Householder, J. E.; Wittmann, F.; Tobler, Mathias W.; Janovec, J. P. (2015)
      Past temperature changes in tropical mountain regions are commonly inferred from vertical elevational shifts of montane indicator taxa in the palynological record.…To the extent that fossilization provides a better record of past vegetation that occurred proximate to the site of deposition, we suggest that habitat tracking of montane elements may introduce a cool bias in lowland paleo-temperature reconstructions based on pollen proxies.