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National Center for Ecological Analysis and Synthesis

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3691-3700 of 6313
  1. Publication

    Conundrums in mixed woody-herbaceous plant systems

  2. Publication

    The (super)tree of life: Procedures, problems, and prospects

    Supertree construction is a new, rigorous approach for combining phylogenetic information to produce more inclusive phylogenies. It has been used to provide some of the largest, most complete phylogenies for diverse groups (e.g., mammals, flowering plants, and dinosaurs) at a variety of taxonomic levels. We critically review methods for assembling supertrees, discuss some of their more interesting mathematical properties, and describe the strengths and limitations of the supertree approach.

  3. Publication

    Global and regional ecosystem modeling: Databases of model drivers and validation measurements

  4. Publication

    Effects of land cover on stream ecosystems: Roles of empirical models and scaling issues

    We built empirical models to estimate the effects of land cover on stream ecosystems in the mid-Atlantic region (USA) and to evaluate the spatial scales over which such models are most effective. Predictive variables included land cover in the watershed, in the streamside corridor, and near the study site, and the number and location of dams and point sources in the watershed. Response variables were annual nitrate flux; species richness of fish, benthic macroinvertebrates, and aquatic plants; and cover of aquatic plants and riparian vegetation.

  5. Publication

    Ecological forecasting and the urbanization of stream ecosystems: Challenges for economists, hydrologists, geomorphologists, and ecologists