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Filtering by: Subject Plant canopies Remove constraint Subject: Plant canopies Decade 1990-1999 Remove constraint Decade: 1990-1999

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  • Estimating ground cover via spectral data

    Creator:
    Axness, Daniel S.
    Abstract:
    Potato ground cover and spectral data were measured in the Columbia Basin during the 1990 growing season. Three spectral were correlated with ground cover; normalized difference, near infrared-red ratio, and the first derivative of the spectral curve at 750 nm. All models were statistically significant at the 99% level. Normalized...
    Resource Type:
    Masters Thesis
    Full Text:
    Figure 2 Grid Placed over Potato Plants 24 Figure 3 Ground Cover vs. Leaf Area Index. 27 Figure 4 Plant

  • Influences of riparian canopy on aquatic communities in high desert streams of eastern Oregon

    Creator:
    Tait, Cynthia K.
    Abstract:
    Because riparian canopy controls most energy inputs to stream ecosystems, it directly affects the structure of aquatic food webs and the ecological processes that govern interactions among trophic levels. This study addresses the interdependence among riparian canopy, benthic community structure, and the carrying capacity of high desert streams for salmonid...
    Resource Type:
    Dissertation
    Full Text:
    ). This variation in plant productivity imposed by canopy provides the "bottom-up template" for stream

  • Seasonal snowcover dynamics beneath boreal forest canopies

    Creator:
    Link, Timothy E.
    Abstract:
    The accurate simulation of snowpack deposition and ablation beneath forested areas is confounded by the fact that the vegetation canopy strongly affects the snow surface energy balance. The canopy alters the radiation balance of the snowcover, and reduces the wind speed at the snow surface. Data collected as part of...
    Resource Type:
    Masters Thesis
    Full Text:
    forested areas is confounded by the fact that the vegetation canopy strongly affects the snow surface