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Table 3 The effect of salvage logging on plant cover type, by regeneration strategy. Plots are compared over all study years with simple effects tests at the same severity level; for example, high burn severity salvage logged plots are compared to high burn severity plots that were not salvage logged. Significant differences between salvage logged and not salvage logged plots are indicated in bold. Unless indicated by a footnote, salvage logging decreased the richness, diversity, or cover of each significant measure.

From: Vegetation Response to Burn Severity, Native Grass Seeding, and Salvage Logging

 

Measure

F-value

P-value

High burn severity, seeded

Richness

4.53

0.03

Diversity

1.07

0.30

Grass

0.20

0.66

Forb

2.16

0.14

Shrub

0.13

0.72

Survivor rhizome (SR)

0.98

0.32

Offsite colonizer (OC)

0.70

0.40

Survivor taproot, caudex, or bulb (SRCB)

0.10

0.75

Residual colonizer (RC)

12.56

<0.001

High burn severity, unseeded

Richness

12.47

<0.001

Diversity

8.61

0.004

Grass A

9.64

0.002

Forb

7.40

0.007

Shrub

9.12

0.003

Survivor rhizome (SR)

0.49

0.48

Offsite colonizer (OC)

0.87

0.35

Survivor taproot, caudex, or bulb (SRCB)

0.06

0.80

Residual colonizer (RC)

7.04

0.008

Moderate burn severity

Richness

0.84

0.36

Diversity

1.17

0.28

Grass A

10.11

0.002

Forb

29.99

<0.001

Shrub

0.66

0.42

Survivor rhizome (SR)

0.59

0.44

Offsite colonizer (OC)

8.99

0.003

Survivor taproot, caudex, or bulb (SRCB)

5.16

0.02

Residual colonizer (RC)

0.58

0.45

Low burn severity

Richness

2.29

0.13

Diversity

3.42

0.07

Grass

0.00

0.97

Forb

1.64

0.20

Shrub

4.14

0.04

Survivor rhizome (SR)

0.03

0.86

Offsite colonizer (OC)

0.01

0.91

Survivor taproot, caudex, or bulb (SRCB)

1.53

0.22

Residual colonizer (RC)

2.10

0.15

  1. A Grass cover was higher on the salvage logged plots compared to the not salvage logged plots.