BULLETIN FLORIDA MUSEUM NATURAL HISTORY VOL. 38 PT. I(3)


Table 9. Species richness (S), Shannon's Diversity Index (H'), and Evenness (E) calculated from the 1989
and 1990 transect data. 0 months since water indicates that ponds were flooded when sampled.

 Months
 Since
Pond Water S H' E


ANF-1 1 15 2.07 0.76
ANF-3 0 16 1.91 0.69
ANF-4 0 15 1.71 0.63
GP (90) 12 17 1.92 0.68
GP (89) 4 15 2.14 0.79
BP (90) 19 10 1.42 0.61
BP(89) 11 13 1.66 0.65
OS 4 19 2.28 0.77
HP 16 12 1.81 0.73
DP 84 9 1.30 0.59
WE-5 0 11 1.76 0.74
WE-6 0 11 1.17 0.49
WE-11 0 9 1.29 0.59



 Wetland index values were calculated for each quadrat for each vegetation
 transect in 1989 and 1990, and a mean was calculated for each pond (Table 7).
 The lowest mean value was 1.13 in WE-11, and the highest mean value was 2.39
 in DP. These results are to be expected since, at the time of sampling, all Welaka
 ponds were flooded, and DP had been dry longer than any other study pond.
 Calculation of the total percent cover along the transects in each pond basin for
 each category of wetland indicator class revealed that all ponds except OS had
 OBL species as the largest component of total percent cover (Table 8). In OS,
 there was only a slightly higher percent cover of FACW when compared to OBL
 (4%). Even DP, which had been dry for at least 84 months, maintained a total
 percent cover of OBL of 69%.
 Species richness (Table 9) ranged from a low of nine species in DP and WE-
 11 to a high of 19 species in OS. The ponds in ANF had the highest average
 species richness, and the WREC ponds had the lowest. Species richness in ONF
 ponds was similar to that in the ANF ponds. Among the ANF ponds and among
 the WREC ponds, species richness was similar, but OSMP ponds varied from the
 lowest to the highest number of species. Species richness was very high in RP, but,
 this result was expected since the number of vegetation samples obtained from this
 site were much higher than any other pond basin.
 Calculation of Shannon's Index (H') resulted in a range of values from 1.17 in
 WE-6 to 2.28 in OS (Table 6). Evenness (E) ranged from 0.49 in WE-6 to 0.79 in