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Table 1 Average nutrient and environmental variables and ANOVA results in reference, transition and impacted sites of several south Florida wetlands

From: Environmental stress and eutrophication in freshwater wetlands: evidence from carbon and nitrogen stable isotopes in cattail (Typha domingensis Pers.)

Variable

Nutrient zone

ANOVA

Reference

Transition

Impacted

F

P

TP (μg L−1)

6.3 ± 1.5

13.7 ± 1.1

46.2 ± 22.3

7.23

0.013

TN (mg L−1)

1.5 ± 0.5

1.6 ± 0.2

2.3 ± 0.5

3.47

0.076

SRP (μg L−1)

1.3 ± 0.6

4.7 ± 0.6

17.5 ± 13.4

7.94

0.004

DIN (μg L−1)

0.12 ± 0.14

0.19 ± 0.20

0.30 ± 0.20

2.89

0.264

TN:TP (molar ratio)

562 ± 350

259 ± 34

126 ± 48

9.34

≤ 0.001

pH (SU)

7.0 ± 0.6

7.1 ± 0.1

7.3 ± 0.1

0.77

0.49

Sulfate (mg L−1)

20.1 ± 32.0

16.3 ± 11.9

47.6 ± 13.4

3.63

0.07