Ecological Archives E091-079-A1

Helen M. Regan, John B. Crookston, Rebecca Swab, Janet Franklin, and Dawn M. Lawson. 2010. Habitat fragmentation and altered fire regime create trade-offs for an obligate seeding shrub. Ecology 91:1114–1123.

Appendix A. Fire hazard function parameters.

Averages and standard deviations for fire return intervals reported with corresponding scale (b) and shape (c) parameters for the Weibull fire hazard function. Results for fuel-driven fires (c = 3) and a combination of fuel- and weather- driven fires (c = 1.42) are shown.

Scale parameter b

Average fire return interval (yr)

Standard deviation of fire interval
c = 3

Standard deviation of fire interval
c = 1.42

5.599

10

3.288

6.898

11.598

20

7.020

14.434

17.21

30

10.868

20.81

22.756

40

13.918

28.768

28.205

50

17.878

35.466

33.997

60

21.196

42.604

39.594

70

24.968

50.206

45.295

80

28.602

58.118


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