DATA ANALYSIS


 Biotic Data Analysis

 Biotic data calculations included vine species richness, frequency of occurrence
 of vines, tree stand structure characteristics, and vine leaf area. Specific formulae are
 provided below.


 Vine Species Richness

 Vine species richness was calculated for each site using the following formula.
 The number of individual vines represents the cumulative vine count taken within the
 square meter quadrats for each site.

 Vine Species Richness = Number of Vine Species 1
 logoo (Number of Individual Vines))


 Vine Basal Diameter

 The mean vine basal diameters for both herbaceous and woody vines on the
 chronosequence sites were compared using MinitabTM Statistical Software, Version 13.1
 (by Minitab, Inc.) to calculate the nonparametric Kruskal-Wallis test, as described by
 Eddison (2000). The null hypothesis was that the median vine basal diameter was the
 same between site ages, and the alternative hypothesis was that the median vine basal
 diameter was not the same for all site ages.


 Frequency of Occurrence of Vines

 The frequency of occurrence of each individual vine species on each site was
 calculated using the following formula:

 Frequency of Occurrence = Number of 1 m2 Quadrats Vine Species Occurs
 Total Number of Quadrats Sampled.


 Stand Structure

 The stand structure of trees was measured by DBH, stem density, and basal area.
Stem density was calculated by dividing the total number of stems counted by the total
elongated quadrat area sampled (6 meters wide elongated quadrat length), adjusted to a
hectare basis.


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