Table 2 Variables affecting hazelnut shrub density (2015 to 2019) in Karuk and Yurok territory, northwestern California, USA. Results of a Wald Type III Chi Square test (χ²) on the significance of burn frequency, elevation, and aspect class on hazelnut shrub density generated from a gamma generalized linear model. Aspect classes included east (67.5° to 112.5°); southeast (112.5° to 157.5°); south (157.5° to 202.5°); southwest (202.5° to 247.5°); and, west (247.5° to 292.5°). df = degree of freedom

From: Revitalized Karuk and Yurok cultural burning to enhance California hazelnut for basketweaving in northwestern California, USA