Ecological Archives E096-115-A4

Steve J. Kroiss and Janneke HilleRisLambers. 2015. Recruitment limitation of long-lived conifers: implications for climate change responses. Ecology 96:1286–1297. http://dx.doi.org/10.1890/14-0595.1

Appendix D. Supplementary results for seed and microsite limitation models.

Table D1. Germination model estimates for the full model (Germination percentage ~ Snowpack duration + Soil moisture + Canopy density + Understory cover + (1|Stand) + (1|Year)). Model estimates with p values < 0.05 are bolded.

Coefficients

Thuja
plicata

Pseudotsuga
menziesii

Tsuga
heterophylla

Abies
amabilis

Callitropsis
nootkatensis

Tsuga
mertensiana

Intercept

-2.40

-2.59

-2.80

-1.17

-1.21

-8.01

Snowpack duration

0.59

0.33

-0.39

0.60

-1.07

-2.74

Soil moisture

0.04

-0.73

0.13

-0.02

0.16

-0.04

Canopy density

-0.95

-0.55

-0.84

0.16

-0.71

-0.54

Understory cover

0.07

0.3

-0.29

-0.34

0.48

0.85

Table D2. Correlations between microsite variables used as explanatory variables in germination models (Eq. 4). Asterisks indicate significance levels (* = P < 0.05).

 

Snowpack duration

Soil moisture

Canopy cover

Understory cover

Snowpack duration

-

0.192*

-0.026

0.0424

Soil moisture

-

-

 -0.120*

0.149*

Canopy cover

-

-

-

 -0.070*

Understory cover

-

-

-

-

 

Table D3. Correlation coefficients for seed density between pairs of species. Significant correlations are bolded. Numbers in parentheses indicate the fraction of individual stand level correlations that are significant (out of the number of stands in which both species are present). Instances in which data are not available (in terms of stands where species overlap) to test these correlations are indicated with n.a.

 

Thuja
plicata

Pseudotsuga
menziesii

Tsuga
heterophylla

Abies
amabilis

Callitropsis
nootkatensis

Tsuga
mertensiana

Thuja plicata

-

-0.061 (0/4)

0.601 (1/7)

0.597 (0/4)

n.a.

n.a.

Pseudotsuga menziesii

  

-

0.251 (1/7)

n.a.

n.a.

n.a.

Tsuga heterophylla

    

-

0.811 (3/7)

n.a.

n.a.

Abies amabilis

      

-

0.526 (0/5)

0.902 (1/5)

Callitropsis nootkatensis

        

-

0.262 (0/4)

Tsuga mertensiana

          

-

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