Plant and Site Measurements
The data are structured hierarchically: measurements are taken at the level of stems within plants, plants within sites, and sites. The data include primary measurements taken in the field or lab as well as data products derived from the primary data. Plant and site measurements include classes of data corresponding to different response types: growth and browsing, ground water use, water stress, photosynthesis, and identification of the species of browsers. Site characterization include meteorological measurements, soil moisture and temperature, and data on depths of water tables. All data is referenced by identification variables that will link the different responses and site characterizations to specific plants and sites. We illustrate the data hierarchy for the growth and browsing data class in Table 1 and Figure 1.  Individual data files are summarized and available for download here.

IdentificationPrimary dataData productsSite measurements
stem numberstem length in fall and
browsing intensityspatial coordinates (utm)
plant numberstem length in fallproductionsnow depth and snow
water equivalents
site numberplant heightwater table depth at
plant location
growing season
datesurveyed location of plant camera trap imagesclassified imagesgrowing season start and end growing season precipitation
soil moisture and
temperature water table depths at 4-8 locations

Table 1: Example of data types for plant growth and browsing data class. Data products are derived
by calculation from primary data.

Figure 1. Relational database structure for the Yellowstone Willow LTREB