Ecological Archives E096-149-A7

Joseph A. LaManna, Amy B. Hemenway, Vanna Boccadori, and Thomas E. Martin. 2015. Bird species turnover is related to changing predation risk along a vegetation gradient. Ecology 96:16701680. http://dx.doi.org/10.1890/14-1333.1

Appendix G. Correlations between population density and nest predation rates for bird species.

Table G1. Correlations between population density and nest predation rates for bird species breeding in western Montana, USA (see Fig. 4). The χ² statistic and corresponding p value from likelihood ratio tests are presented along with Pearson's correlation coefficient (r), sample size of study forest stands (n), and link function. Significant effects (p < 0.05) are bolded and marginally significant effects (p < 0.10) are italicized. Bird species are ordered according to effect size of PC axes on density (see Appendix E).

Species

χ²

p value

r

n

Link Function

House Wren

0.24

0.627

-0.21

5

identity

Western Wood-pewee

0.61

0.435

-0.33

7

log

Mountain Bluebird

2.64

0.105

-0.62

6

log

Northern Flicker

10.45

0.001

-0.92

6

identity

Red-naped Sapsucker

4.17

0.041

-0.70

11

log

Mountain Chickadee

13.67

< 0.001

-0.87

13

identity

Red-breasted Nuthatch

2.65

0.104

0.73

6

identity

Ruby-crowned Kinglet

10.25

0.001

-0.89

8

log

Chipping Sparrow

11.64

0.001

-0.73

15

identity

Dark-eyed Junco

0.89

0.345

0.25

14

identity

Yellow-rumped Warbler

5.25

0.022

-0.73

11

log

Lincoln's Sparrow

14.45

< 0.001

-0.94

8

log

Yellow Warbler

5.68

0.017

-0.92

7

log

Dusky Flycatcher

4.17

0.041

-0.56

11

identity

Warbling Vireo

4.21

0.040

-0.51

16

identity

American Robin

4.94

0.026

-0.60

16

log


[Back to E096-149]