In the circular plots below tree crowns a large fraction of the trees (including the ones with the largest dbh
) showed very low levels of fruit production, and few individuals produced most of the fruits for three consecutive years.
Moreover, the positive correlation between the size of the whip spiders and the DBH
of the trees on which they were found suggests that large individuals can hold the largest trees, which present a higher probability of presenting buttresses.
(1992) noted that Cerulean Warblers were more often found in trees with larger dbh
, and spent most of their time above the middle of the tree.
We also observed juvenile male RCWs foraging on smaller dbh
hardwoods such as winged elm and sweetgum.
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Staining for DBH
was positive in 8 carcinoids and 15 pheochromocytomas (P = 0.04).
where [D.sub.n] is dbh
of an individual neighboring tree and [dist.sub.n,f] is the distance between neighboring and focal trees.
Linear regression was performed on age class and dbh
data for the three species chosen for age class analysis.
The only variable that showed no significant correlation was maximum dbh
of the subplot.
Habitat characteristics used as dependent variables included: mean stand density, mean stand DBH
, variation in stand DBH
, snag density, mean snag DBH
, shrub height, shrub cover, and CWD, resulting in a total of eight linear models.
From the data I compiled floristic tables of family, genus and species and then generated these physical structure parameters (1) the total number of stems, the mean dbh
among those stems, and the number of stems in each of four size classes: 10 cm < 20 cm dbh
, 20 cm < 30 cm dbh
, 30 cm < 40 cm dbh
and those with a dbh
[greater than or equal to] 40 cm, (2) the total basal area which is the sum of the basal areas of all individual stems ([SIGMA][pi][r.sup.2]; where r = the dbh
of the individual stem / 2), (3) the aboveground (AG) biomass of all the trees (using the formula in Nascimento and Lawrance  suggested for tropical trees of these stem sizes), (4) the percent closure of the canopy (using the formula in Buchholz et al.
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