The distribution of woody species in relation to climate and fire in Yosemite National Park, California, USA

Fire Ecology

Table 3 Best fit models (i.e., models with lowest AICc) and importance weights for predictor variables for conifer presence in all plots and in all unburned plots in Yosemite National Park, California, USA (1991 to 2017). Species listed occurred in five or more plots for all plots and unburned plots, respectively. Models are defined in Table 1, and slope coefficients are displayed for BURN and FRID when in the best-fit model. The coefficients represent the change in log odds of occurrence for every 10-unit increase in FRID. Important effects are indicated by positive (+) and negative (–) symbols according to the sign of their coefficients for AET or Deficit effects, or by asterisks (*) for BURN and FRID effects. Single sign denotes significance (variable importance >0.7 and P value <0.05), double sign denotes strong significance (variable importance >0.9 and P value <0.01), zero (0) or ns denotes non-significance (variable importance <0.7 or P value >0.05), and n/a denotes that the variable did not occur in the best model

	Model	AET	AET²	Deficit	Deficit²	BURN	Model	AET	AET²	Deficit	Deficit²	FRID
Species	All plots						Unburned plots
Abies concolor	2b	++	– –	+	– –	1.061^**	3b	++	–	+	– –	2.128^**
Abies magnifica	2b	– –	– –	0	– –	0.802^*	3b	– –	– –	++	– –	–1.804^**
Calocedrus decurrens	2b	++	0	++	– –	0.571^*	3b	++	0	+	–	2.511^**
Juniperus grandis	2b	– –	0	0	– –	–16.173^ns	1b	– –	0	0	– –	n/a
Pinus albicaulis	2b	0	0	–	–	–16.154^ns	1b	0	0	–	–	n/a
Pinus contorta	1b	– –	– –	– –	– –	n/a	3b	– –	– –	0	– –	–2.341^**
Pinus jeffreyi	2b	– –	0	++	– –	0.664^ns	1b	– –	0	++	– –	n/a
Pinus lambertiana	2b	++	– –	0	– –	1.241^**	3b	++	0	0	–	1.886^**
Pinus monticola	2b	– –	–	0	– –	–1.462^ns	3b	--	–	0	– –	–1.291^ns
Pinus ponderosa	2b	++	0	++	–	0.794^**	3b	+	0	++	0	1.886^**
Pinus sabiniana	1a	0	n/a	++	n/a	n/a	1a	0	n/a	++	n/a	n/a
Pseudotsuga menziesii	1b	0	0	0	0	n/a	3b	0	0	0	0	1.434^*
Sequoiadendron giganteum	2b	+	–	0	0	1.416^*	1b	0	0	0	0	n/a
Tsuga mertensiana	1b	0	0	0	0	n/a	1b	0	0	0	0	n/a