BULLETIN FLORIDA STATE MUSEUM


Table 13. F-tests of hypotheses showing significance levels of contrasts between end
 results of post-mining treatments and of response to site age. Because of the
 large number of tests, an elevated alpha is appropriate, and significance is
 judged at P<0.01.

 withvs. ungrazed clay vs. clay vs. response to
 Variables without vs. grazed with/without pastures site age

Annual data
 T. herb species ns ns ns ns ns
 Herb H' ns ns ns ns ns
 T. herb cover ns ns ns ns ns
 T. shrub species ns ns *** *** **
 Shrub H' ns ns *** ** **
 T. shrub cover ns ns ns *** **
 T. tree species *** ns *** *** ***
 Tree H' ** ns *** ns **
 T. tree individuals ns ns ns ** ***
 T. tree basal area ns ns *** **
 T. herpetofauna species ns ns ns ns
 T. large mammal species ns ns ns ns ns

Seasonal data
 T. small mammal species ns ns ns ns *
 Small mammal H' ns ns ns ns ***
 T. small mammal individuals ns ns ns ns **
 T. small mammal biomass ns ns ns ns ***
 T. bird species ns ** ns *
 Bird H' ns ns ns *
 T. bird individuals ns ns ns ns ***
 T. bird biomass ** ns ns **
 T. insect biomass ns ns ns ns


T = transformed
ns = not significant
* = P<0.05
** = P<0.01
*** = P<0.001



lized as shrub cover and H' continued to increase (the latter because of
increased evenness of species' abundances). Beginning in year 17, a cycle
of colonization and decline occurred, with a peak at 30-31 years. Con-
currently, shrub cover and H' decline as trees became more dominant.
Tree species, H', and individuals (Fig. 21B) all showed steady increases
during succession. However, tree basal area reaches its peak in year 26-
27 and decreased thereafter. Transformed values for small mammal spe-
cies and H' (Fig. 21D) changed very little over time. However, the pat-
tern for small mammal individuals and biomass roughly corresponded


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