% Constancy[pmp1] (%C) is a measurement based on the species presence data expressed as the per cent of times a given species is found in the sites visited as a function of all the sites assessed in the study.
% Basal Area (%BA) for any given species was calculated from the Basal Area values of each species as a function of the total basal area measured at each site.
A % Encounter [pmp2] (%EBA) value was calculated in a similar fashion as the % Constancy value but using only the presence of a given species if it contributed to the basal area measurement.
% Stem density (%DS) was calculated for each site for each DBH range (See Table 1), as well as, for the combination of ranges covering breast height diameters above 10cm (%D-p poles excluded).
% Relative Cover (%Cover) was estimated from the relative contribution that trees, with heights over 15m (height class 3 and up), would have contributed to the basal area of the site based on the following calculation: Height Class x Basal area x % Encounter.
[pmp1]Constancy: the dispersion of of a species throughout a community. A constant is a species that shows up in almost every sample taken (indicating an occupation of roughly 80%).
4(Ecology) the frequency of occurrence of a particular species in sample plots from a plant community
[pmp2]Final review: use % Constancy for total frequency and % encounter for BA based values