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Table 6 Linear mixed models predicting crown fire initiation and transmissivity as a function of fuel treatment (prescribed fire, mechanical, or untreated control), woodland phase, and year (years 0, 1, 2, 3, 6, and 10 post-treatment) from ten replicate sites across the Intermountain West, USA

From: Fuel treatments in shrublands experiencing pinyon and juniper expansion result in trade-offs between desired vegetation and increased fire behavior

 

Crown initiation

Crown transmissivity

Source

F

P

F

P

Intercept

1156.1

< 0.001

17.3

0.002

Year

90.4

< 0.001

4.3

0.001

Treatment

302.9

< 0.001

45.7

< 0.001

Phase

64.7

< 0.001

56.4

< 0.001

Year × treatment

12.4

< 0.001

4.8

< 0.001

Year × phase

1.7

0.08

3.0

0.001

Treatment × phase

3.9

0.004

32.6

<0.001

Year × treatment × phase

0.6

0.93

3.1

<0.001