This data set includes measurements of 40 stems of Chrysolepis sempervirens (Kellogg) Hjelmq. (bush chinquapin), 41 stems of Cornus sericea L. (redosier dogwood), 50 stems of Corylus cornuta Marsh. ssp. californica (A. DC.) E. Murray, and 40 stems of Leucothoe davisiae Torrey (Sierra laurel), as reported in Lutz et al. (2014, 2017). Nomenclature follows Flora of North America (1993+).
US Dept. of Interior, National Park Service
Utah Agricultural Experiment Station
Utah State University
NPS Awards P14AC00122 and P14AC00197
Field and calculation methods followed Van Pelt et al. (2016) which are summarized here. Prior to sampling, the population of shrubs was surveyed in the 25.6 ha area of the Yosemite Forest Dynamics Plot (YFDP), located in Yosemite National Park, latitude 37.766°N, 119.819°W (Lutz et al. 2012) to determine the diameter distribution of each species. Plants for dissection were selected outside the YFDP, but within 200 m of the plot boundaries. Whole plant measurements were made prior to harvest. Shrub diameter was measured at the base (basal diameter; dba), and if the stem was ≥1.37 m long, at 1.37 m above the ground (diameter at breast height; dbh). Two measurements of crown width were taken (north-south and east-west), and crown depth was measured. To account for the varying minimum diameters of stems, we measured up to six distal diameters for each stem.
Shrub stems were cut as close to the ground as possible. Foliage was removed and saved. Stems were then measured with calipers and divided into diameter classes: 0 cm to 0.5 cm; 0.5 cm to 1.0 cm; and every cm thereafter. We measured the length of each piece and tallied the total pathlength of each diameter interval. Pathlength was further delineated as “green” (i.e., having photosynthetic bark) and “brown” (i.e., non-photosynthetic bark). We measured bark thickness on each cut end, so that calculations of volume and surface area could be made separately for bark and wood.
Small wood samples spanning the full diameter range of the dissections were carefully measured for volume of both wood and bark, oven-dried at 60°C, had bark and wood separated. Knowing that bound water may not leave a wood sample until dried at >100°C (Williamson and Wiemann 2010), we dried subsamples of wood and bark at 102°C for two weeks. Leaves were dried at 60°C for two weeks.
The basal face of each stem was progressively sanded to 400 grit, and rings were counted.
The consolidated data for all specimens is included in files shrub_allometry_table_fd_plant.csv and shrub_allometry_table_ShrubBiomass.csv. Successive levels of raw data are found in the remaining files.
Chrysolepis sempervirens, Cornus sericea, Corylus cornuta ssp. californica, Leucothoe davisiae
Yosemite Forest Dynamics Plot (YFDP), located in Yosemite National Park, latitude 37.766°N, 119.819°W
See attached README file.
Lutz, J. A.; Freund, J. A.; Larson, A. J.; Swanson, M. E.; Furniss, T. J.; Becker, K.M. L.; Blomdahl, E. M.; Cansler, C. A.; Germain, S. J.; and Jeronimo, S. M. A., "Data for allometric equations of Chrysolepis sempervirens, Cornus sericea, Corylus cornuta ssp. californica, and Leucothoe davisiae." (2017). Browse all Datasets. Paper 22.
shrub_allometry_table_fd_pathlength.csv (39 kB)
shrub_allometry_table_fd_plant.csv (12 kB)
shrub_allometry_table_Midpt_Diameter.csv (1 kB)
shrub_allometry_table_ShrubBiomass.csv (13 kB)