1987 SCHNOES AND HUMPHREY: TERRESTRIAL COMMUNITIES IN FLORIDA 103


 60 A. SHRUBS 12 B. TREES
 55 11
 5o"" =-46 10-" 2 .
 405 "
 > 35 ------------- r" 0996 0> 7
 0 30 0 6.
 > 25 r2= 0912

 |-----------1
 sor' oas


 -05 -1
 -10 -2, -- -- -
 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 2 4 6 10 12 14 16 18 20 22 24 26 2 30 32 3 36
 YEARS YEARS


 ro C. BIRDS 14 --'". D. MAMMALS
 65 r2=0365 13
 60- 12 / =0.669
 60- 11



 935 5





 0 2 4 6 10 214161830222426 28 33 024 10 I2 .14.16.18 ....2422. .32. 3
 YEARS YEARS
 S5show r a -9 a 30-31 23





 peak was higher, and abundance levels were very low by year 36. Bird
 decreased through year 36 (Fig. 21C). Bird H' increased slowly through----








 Stepwise multiple regression generated a large number of significant
 relation s r 0403
 10 -2
 -2
 05 -3
 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 3X 3 34 36 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36
 YEARS YEARS

 Figure 21.-oModels ofplant and animal response to serat age of unreclaimed overbur-
den piles, based on the age effects shown in Table 13.



with that for shrub species, with two cycles of colonization and decline
showing peaks at 8-9 and 30-31 years and a low at 23 years. The first
peak was higher, and abundance levels were very low by year 36. Bird
species, individuals, and biomass increased until 22-25 years and then
decreased through year 36 (Fig. 21C). Bird H' increased slowly through-
out the sere.
 Stepwise multiple regression generated a large number of significant
relationships between bird and plant variables. The most consistent re-
lationships can be used to estimate wildlife potential of field sites. Equa-
tions selected for this purpose were limited to those that were based on
annual (not quarterly) data, were mathematically simple, had very high
probability values, and had their dependent variables already shown to
change predictably during succession (Fig. 21A, B). Two equations met
these criteria. For end treatments,
 TBS = 2.0777 + 0.7411 TTS (F = 22.1,) P<0.001,r2 = 0.630),
and for successful sites,
 TBS = 2.7161 + 0.4489 TSC (F = 19.4, P<0.001, r2 = 0.661),
where TBS is transformed bird species, TTS is transformed tree species,
and TSC is transformed shrub cover.