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Table 2 The density measured as the level of occupancy in the four populations we studied and the corresponding parameters for the fractal and Poisson models

From: Implications of salep collection for the conservation of the Elder-flowered orchid (Dactylorhiza sambucina) in Epirus, Greece

Level

Width of cell (m)

Sub-cell width (m)

Total cells

Sampled/repl.

ANTH

ANIL

TYMF

LAKM

0

512

128

1

1

14%

43%

19%

14%

1

128

32

16

2

18%

20%

26%

13%

2

32

8

256

4

26%

13%

13%

23%

3

8

2

4096

8

12%

7%

8%

16%

4

2

0.5

65,536

16

23%

7%

7%

9%

r, Poisson rate/m2

0.00072

0.00045

0.00031

0.00058

Av. pF

0.19

0.18

0.15

0.15

p value

0.590

0.038

0.077

0.750

  1. Also shown are the results of testing for an increase of occupancy with scale, that would indicate a Poisson pattern (uniformly spread throughout the landscape) by means of p-values