Sugar maple seedlings were examined at Hubbard Brook Experimental Forest on calcium-treated and reference sites during August 2003 and June 2004. Seedlings were sampled every ten steps in transects.

hbr_maples

Format

A tibble with 359 rows and 11 variables

year

a number denoting the year that the sample was taken

watershed

a factor denoting the watershed where the sample was collected; W1 = calcium-treated, Reference = reference

elevation

a factor describing the sample staion where the fecal sample was collected

transect

a factor denoting the transect number within the watershed

sample

a factor denoting the sample number within transect. There are twenty samples in each transect

stem_length

a number denoting the height of the seedling in millimeters

leaf1area

a number denoting the area of the first sampled leaf in square centimeters

leaf2area

a number denoting the area of the second sampled leaf in square centimeters

leaf_dry_mass

a number denoting the dry mass of both sampled leaves in grams

stem_dry_mass

a number denoting the dry mass of the stem in grams

corrected_leaf_area

a number denoting the area of both leaves in addition to the area removed for chlorophyll measurements in square centimeters

Source

Juice, S. and T. Fahey. 2019. Health and mycorrhizal colonization response of sugar maple (Acer saccharum) seedlings to calcium addition in Watershed 1 at the Hubbard Brook Experimental Forest ver 3. Environmental Data Initiative. https://doi.org/10.6073/pasta/0ade53ede9a916a36962799b2407097e