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Table 1 Results of the repeated measures ANOVAs for Daphnia population data

From: Phosphorus limitation enhances parasite impact: feedback effects at the population level

   

P-sufficient

P-limited

   

df

F

p

df

F

p

Abund. total

BSEa

Infection (I)

1

0.59c

0.473

1

0.01c

0.934

  

Error

6

  

6

  
 

WSEb

Day (D)

5

274.5

<0.001

5

53.9

<0.001

  

D x I

5

15.7

<0.001

5

24.4

<0.001

  

Error

30

  

30

  

Abund. adults

BSE

Infection (I)

1

5.59c

0.056

1

2.90d

0.140

  

Error

6

  

6

  
 

WSE

Day (D)

3

239.8

<0.001

1.05e

3.18

0.122

  

D x I

3

11.6

<0.001

1.05e

1.88

0.218

  

Error

18

  

6.27e

  

Abund. juv.

BSE

Infection (I)

1

10.55f

0.017

1

17.7f

0.006

  

Error

6

  

6

  
 

WSE

Day (D)

1.98e

24.7

<0.001

4

16.9

<0.001

  

D x I

1.98e

14.2

<0.001

4

20.1

<0.001

  

Error

11.9e

  

24

  

Biomass

BSE

Infection (I)

1

0.26

0.631

1

2.9

0.139

  

Error

6

  

6

  
 

WSE

Day (D)

2.52e

425.0

<0.001

2.85e

74.1

<0.001

  

D x I

2.52e

0.88

0.529

2.85e

32.6

<0.001

  

Error

15.1e

  

17.1e

  

Ind. size adults

BSE

Infection (I)

1

30.4g

<0.001

1

16.18f

0.007

  

Error

6

  

6

  
 

WSE

Day (D)

2.24e

175.1

<0.001

2.13e

16.3

<0.001

  

D x I

2.24e

15.0

<0.001

2.13e

4.7

<0.001

  

Error

13.5e

  

12.8e

  

Ind. size juv.

BSE

Infection (I)

1

5.4

0.059

1

11.8f

0.014

  

Error

6

   

6

 
 

WSE

Day (D)

5

46.2

<0.001

5

22.5

<0.001

  

D x I

5

4.4

0.004

5

29.2

<0.001

  

Error

30

  

30

  
  1. Tested variables are population abundance (Abund. total), abundances of adults and juveniles, population biomass (mg C L-1) and individual sizes (μg C) of adults and juveniles for uninfected and infected Daphnia magna in P-sufficient and P-limited populations in the 32-day experiment.
  2. a)Between subjects effects, b)Within subject effects, c)ln-transformed, d)transformation y = -1/(x + 1)^3, e)Greenhouse Geisser corrected statistics, f)square root-transformed, g)transformation y = ln(x + 1).