Skip to main content

Table 4 t-Test for cattail expansion (CTC% increases) with different soil total phosphorus in both surface-burned area (SBA) and non-burned area (NBA) four years after the 1999 fire, sampling in May, 2003. Soil total phosphorus (mg/kg) categories: P01: 0-299; P02: 300-499; P03: 500-699; P04: 700-899; P05: 900-1099; P06: >= 1100

From: Impacts of fire and phosphorus on sawgrass and cattails in an altered landscape of the Florida Everglades

X

Mean (s.d.)

n

Σ(X-M)2

Y

Mean (s.d.)

n

Σ(Y-M)2

t

SBA-P01-CTC

8 (4)

5

80

NBA-P01-CTC

4 (5)

5

120

1.27

SBA-P02-CTC

13 (12)

5

580

NBA-P02-CTC

13 (10)

5

480

0.00

SBA-P03CTC

23 (25)

6

3088

NBA-P03CTC

22 (15)

6

1083

0.07

SBA-P04-CTC

36 (28)

5

3120

NBA-P04-CTC

40 (0)

2

0

−0.19

SBA-P05-CTC

59 (18)

11

3241

NBA-P05-CTC

53 (23)

3

1067

0.47

SBA-P06-CTC

76 (17)

5

1120

NBA-P06-CTC

70 (15)

11

2323

0.77

NBA-P01-CTC

4 (5)

5

120

NBA-P03CTC

22 (15)

6

1083

−2.53*

NBA-P02-CTC

13 (10)

5

480

NBA-P04-CTC

40 (0)

2

0

−3.29*

NBA-P03CTC

22 (15)

6

1083

NBA-P05-CTC

53 (23)

3

1067

−2.55*

NBA-P04-CTC

40 (0)

2

0

NBA-P06-CTC

70 (15)

11

2323

−2.64*

SBA-P01-CTC

8 (4)

5

80

SBA-P03CTC

23 (25)

6

3088

−1.28

SBA-P02-CTC

13 (12)

5

580

SBA-P04-CTC

36 (28)

5

3120

−1.69

SBA-P03CTC

23 (25)

6

3088

SBA-P05-CTC

59 (18)

11

3241

−3.51*

SBA-P04-CTC

36 (28)

5

3120

SBA-P06-CTC

76 (17)

5

1120

−2.75*

  1. * Statistically significant.