1 Appendix S2-Model fitting: errors The figures below

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opercular area. Figure S3. Distribution of errors for models based on density. 0. 10. 20. 3 0. 4 0. 5 0. 60. 70. -1.0. -0.8. -0.6. -0.4. -0.2. 0.0. 0.2. 0.4. 0.6. 0.8. 1.0. 0.
Appendix S2-Model fitting: errors

The figures below summarise the distribution of errors of models with two parameters adjusted to survival of Semibalanus balanoides in two intertidal shores using the exponential, logistic and hyperbolic functional forms.

Panels show errors for different independent

variables: Figure S3: barnacle density; Figure S4 cover estimated from density and average opercular area.

Shore 1

Shore 2

0.6

0.4

Exponential

Exponential

0.4

0.2 0.2 0.0

0.0

-0.2 -0.2 -0.4 -0.6

0

10

20

30

40

50

60

-0.4

70

0

10

20

30

40

50

60

20

30

40

50

60

30

40

50

60

5.0

4.0

4.0

3.0

Raw errors

3.0 2.0

2.0

1.0

1.0

0.0

0.0 -1.0

-1.0

-2.0 -2.0 -3.0

Logistic

-3.0

Logistic

-4.0

-4.0

-5.0 0

10

20

30

40

50

60

70

0

10

0 .4

1.0 0.8 0.6

0 .2

0.4 0.2 0 .0

0.0 -0.2 -0.4

-0 .2

-0.6

Hyperbolic

-0.8 -1.0

Hyperbolic -0 .4

0

10

20

30

40

50

60

0

70

10

Density (ind cm-2)

Figure S3. Distribution of errors for models based on density

1

20

Errors showed the same patterns irrespective of the independent variable but varied mainly according to the functional form of survival. Errors from the exponential and hyperbolic functional forms show trends and are not evenly distributed; the amount of dispersion at densities, 30 ind cm-2 or cover