Ecological Archives E090-009-A5

Kristoffer Hylander. 2009. No increase in colonization rate of boreal bryophytes close to propagule sources. Ecology 90:160–169.

Appendix E. Model statistics for the general linear models with Poisson error term for species richness divided into different groups based on taxonomy and frequency of sexual reproduction.

TABLE E1. Model statistics for the GLMs with poison error term for species richness divided into different groups based on taxonomy and frequency of sexual reproduction. Z-values and P values are given for the contribution of distance to mature forest edge in a model with site identity as a factor and the co-variables (if significantly contributing): frequency of boulders (BOUL), meter of small logs (LOGS), meter of large logs (LOGL), and frequency of dry ground (DRY). Dependent variables were the number of species recorded at different distances from the mature forest edge. N = 23.

Y-variable

z-value

P value
(log distance)

Residual
deviance

df

Covariates included
in model

All species

0.58

0.56

25

67

LOGS

Mosses

-0.37

0.71

9

68

 

Liverworts

1.2

0.22

42

67

LOGS

All species (pine pairs, n = 8)

0.67

0.50

7

22

 

All species (spruce pairs, n = 5)

-0.83

0.41

1

14

 

All species (old spruce/young pine pairs, n = 10)

0.71

0.48

18

29

 

Species with significantly positive indicator values for mature forest

0.63

0.63

23

67

LOGS

Mosses with positive indicator values

-0.24

0.81

6

68

 

Mosses which seldom produce sporophytes

-0.13

0.89

18

68

 

Liverworts with positive indicator values

1.0

0.31

36

67

LOGS

Liverworts which seldom produce sporophytes

0.75

0.46

40

67

LOGS

Liverworts which seldom produce gemmae

0.91

0.37

32

67

LOGS


[Back to E090-009]