Now showing items 1-3 of 3

    • Food web structure and the role of epilithic biofilms in cave streams 

      Simon, K. S.; Benfield, E. F.; Macko, S. A. (Ecological Society of America, 2003-09)
      Cave stream food webs rely exclusively on detritus from the surface for energy and represent a heterotrophic end point in the continuum of stream types. Both dissolved organic matter (DOM) and particulate organic matter, ...
    • Nitrogen cycling in a forest stream determined by a n-15 tracer addition 

      Mulholland, P. J.; Tank, J. L.; Sanzone, D. M.; Wollheim, W. M.; Peterson, B. J.; Webster, J. R.; Meyer, J. L. (Ecological Society of America, 2000-08)
      Nitrogen uptake and cycling was examined using a six-week tracer addition of N-15-labeled ammonium in early spring in Walker Branch, a first-order deciduous forest stream in eastern Tennessee. Prior to the N-15 addition, ...
    • The relative importance of exogenous and substrate-derived nitrogen for microbial growth during leaf decomposition 

      Cheever, B. M.; Webster, J. R.; Bilger, E. E.; Thomas, S. A. (Ecological Society of America, 2013-07)
      Heterotrophic microbes colonizing detritus obtain nitrogen (N) for growth by assimilating N from their substrate or immobilizing exogenous inorganic N. Microbial use of these two pools has different implications for N ...