Ecological Archives A018-004-A3

Christy A. Morrissey, Patti L. Dods, and John E. Elliott. 2008. Pesticide treatments affect mountain pine beetle abundance and woodpecker foraging behavior. Ecological Applications 18:172–184.

Appendix C. Mean tree type densities assessed in monosodium methanearsonate (MSMA) and reference stands containing insect flight traps in the Cascades Forest District in British Columbia, Canada.

TABLE C1. Mean tree type densities (no. trees/ hectare ± SE) assessed in MSMA and reference stands containing insect flight traps in the Cascades Forest District, British Columbia, Canada. The percentage contribution of each tree type to the total vegetation composition in each treatment is also shown. Tree type densities that were significantly different (P < 0.05) between treatments are denoted by an asterisk ‘*’.

Tree type

MSMA sites (n = 3)

Reference sites (n = 3)

 

Tree density

%

Tree density

%

Live fir*

305.10 ± 68.98

51.4

14.15 ± 7.21

1.6

Dead fir*

18.48 ± 13.76

3.1

0.00 ± 0.00

0

Ponderosa pine

5.90 ± 4.25

1.0

0.00 ± 0.00

0

Lodgepole pine

243.38 ± 100.65

41.0

571.68 ± 241.47

65.2

Dead lodgepole pine*

18.87 ± 9.82

3.2

121.88 ± 13.64

13.9

Spruce

1.18 ± 1.18

0.2

164.74 ± 81.74

18.8

Dead Spruce

0.00 ± 0.00

0

3.15 ± 1.57

0.4

Aspen

1.18 ± 1.18

0.2

1.57 ± 1.57

0.2

Green Attack (MPB) pine

70.77 ± 40.68

11.9

103.80 ± 51.76

11.8

Red Attack (MPB) pine

1.18 ± 4.23

0.2

7.86 ± 5.67

0.9

Old Attack (MPB) pine

9.44 ± 9.44

1.6

33.81 ± 2.84

3.9



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