layers were analyzed independently. Due to significant AREA*SITE*SAMPLING

PERIOD interactions, contrast statements were used to differentiate among specific sites.

Data was log-transformed to improve normality and heteroscedescity. Regressions were

performed using SYSTAT 10.2 (SYSTAT, 2002) for individual time periods. Mean

values of all sampling dates were combined for tables and charts. Significant differences

and correlation coefficients are significant at the p<0.05 level, unless otherwise noted.

 Results

 Mean values were calculated from the three sampling periods in order to analyze

the effects of the canal inflows in LNWR, WCA-2A, WCA-3A, and ENP-TS. The

results of mixed model repeated measures analysis on differences between enriched and

reference sites are presented in Tables 4-1 and 4-2 for the benthic data and Tables 4-4 and

4-5 for the soil data. Due to the complexity of responses at the transitional sites, these

results are presented separately.

Benthic Data

 Nutrient data (Tables 4-1 & 4-2) for the benthic layers reflected significantly higher

total phosphorus (TP) at the enriched sites in all four areas. The greatest P concentrations

were present in the enriched LNWR and WCA-3A sites. TP concentrations were within

the ranges reported in other studies (Koch and Reddy, 1992; Reddy et al., 1993; DeBusk

et al., 1994; Wright et al., 2001b). Among the reference sites, the lowest average TP

concentrations were within ENP-TS at 0.1 g kg-1. These low values were also reported in

an earlier study (Wright et al., 2001b).

 Generally, there were not consistently significant differences between the enriched

and reference TN and TOC values in the four areas (Tables 4-1 & 4-2). TN did vary

significantly along the gradient in LNWR. TN and TOC concentrations were similar to