physiognomically distinct vegetational types were identified: (1) areas 
dominated by grasses and forbs, (2) areas dominated by shrubs, and (3) 
areas dominated by young trees. 
Quadrats were selected, using a stratified random method, to measure 
plant species occurrence and abundance. Previous experience with similar 
vegetational types has demonstrated that 0.2-meter x 0.2-meter square 
quadrats arranged in a stratified random manner produce statistically valid 
results in grass-dominated and forb-dominated vegetation (Levy, 1970, 
1976). The use of 16 square-meter (4.5-meter-diameter circular) quadrats in 
shrubby vegetation and in areas dominated by shrubs and small trees also 
produces valid results. 
A running mean analysis of the dominant species in each community 
(Oosting, 1956; Levy, 1976) was used to determine the number of plots 
required for a statistically adequate sample; the mean obtained for the 
dominant species in the first sample quadrat was plotted against the mean of 
plots 1 and 2, plots 1, 2, and 3, etc. A sufficient number of plots were 
sampled when the regression line generated by this procedure varied no more 
than 10 percent from previously obtained mean values for the population. A 
minimum of 5 plots were sampled in the shrub-tree and shrub-dominated com- 
munities and 20 in the grass-dominated communities for two or three dominant 
Species in each community prior to running mean analyses. Enough samples 
were obtained to ensure adequate sampling of all dominant species, but 
rarer species (those with low frequency of occurrence in the sample plots) 
may have been inadequately sampled. 
Table 1 shows the number of quadrats required for an adequate sample in 
both this study and Levy (1976), the community types common to both studies, 
and the communities newly described in this-investigation. 
Quadrat frequency and species' standing crop data were collected for 
all communities except the sound-side and oceanside shrub communities. For 
the latter, frequency for all woody species and rooted stem density were 
determined. Standing crop was determined in grams of aboveground ovendried 
“live tissue. Only aboveground parts were removed to avoid excessive 
disturbance to the area. Each quadrat was clipped, separated by species, 
and individual species ovendried to constant weight at 105° Celsius. 
Quadrat sampling dates were within a l-week period of the following dates: 
25 May, 20 July, 12 September, 6 November 1981. Ten 16 square-meter (4.5- 
meter-diameter circular) quadrats and 1,760 0.2-meter x 0.2-meter quadrats 
were examined and clipped. 
c. Vegetational Mapping. Three overflights of the study area were 
made in June, September, and November 1981 to obtain seasonal coverage. 
Infrared aerial photos, taken using a Canon AE-1 35-millimeter camera with a 
polarizing filter and Ektachrome IE 135-20 color infrared sensitive film, 
were used in conjunction with ground-truth data from the previously 
described transect and quadrat data to produce a vegetative map of the 
study area with better than 90 percent accuracy. 
d. Ordination of Stands. Twelve community types were arranged in an 
ordination model according to the method of Bray and Curtis (1957). In this 
method each community's frequency values were summed. Each individual 
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