Fuel bed response to vegetation treatments in juniper-invaded sagebrush steppe

Bernau, Christopher R.; Strand, Eva K.; Bunting, Stephen C.

doi:10.1186/s42408-018-0002-z

Fire Ecology

Table 2 Pinyon −juniper woodland mean and standard deviation (SD) of fuel load (kg ha⁻¹) by fuel type pre treatment and two years post treatment

From: Fuel bed response to vegetation treatments in juniper-invaded sagebrush steppe

Fuel type	Phase	Control (C)							Prescribed burn treatment (Rx)								Mechanical treatment (M)
		Pre treatment			Post treatment			Change	Pre treatment			Post treatment			Change	C vs. Rx	Pre treatment			Post treatment			Change	C vs. M	Rx vs. M
		n	Mean	SD	n	Mean	SD	%	n	Mean	SD	n	Mean	SD	%	P value	n	Mean	SD	n	Mean	SD	%	P value	P value
Live herbaceous	1	9	288	134	9	549	253	90	10	218	134	10	772	296	254	0.032	6	214	73	6	525	285	146	0.857	0.149
	2	9	200	163	9	285	149	43	12	142	54	12	637	431	350	0.004	14	111	71	14	352	211	218	0.303	0.074
	3	13	41	32	13	41	21	0	11	8	13	11	153	175	1831	0.007	10	48	38	10	134	83	181	0.153	0.359
Shrub biomass	1	9	5449	5238	12	3467	2546	−36	10	5171	3645	13	2950	1514	−43	0.013	6	4845	1638	10	4456	1404	−8	0.645	0.004
	2	9	2764	1830	16	2179	1351	−21	12	2950	1514	26	504	1074	−83	0.024	14	3244	2385	26	3851	2743	19	0.388	< 0.001
	3	13	507	485	18	567	664	12	11	173	326	16	133	194	−23	0.960	10	773	714	13	1279	1537	66	0.965	0.888
Shrub 1-h	1	9	1527	858	12	1420	827	−7	10	1747	1073	13	1184	584	−32	< 0.001	6	1888	629	10	1651	444	−13	0.990	0.001
	2	9	1130	845	16	757	453	−33	12	1184	584	26	209	374	−82	0.025	14	1093	665	26	1307	816	20	0.268	< 0.001
	3	13	193	167	18	193	201	0	11	72	117	16	55	76	−24	1.000	10	310	265	13	472	530	52	0.661	0.721
Shrub 10-h	1	9	1152	1137	12	753	695	−35	10	1211	958	13	777	266	−36	0.061	6	1164	529	10	1876	1458	61	0.201	0.002
	2	9	616	568	16	577	359	−6	12	777	266	26	282	565	−64	0.016	14	605	325	26	1207	1262	99	0.431	< 0.001
	3	13	103	92	18	146	174	42	11	42	76	16	60	80	43	0.997	10	230	267	13	399	553	74	0.999	0.994
DWD 10-h	1	12	534	390	12	552	307	3	13	983	702	13	887	306	−10	0.197	10	593	360	10	1238	772	109	0.007	0.318
	2	16	591	328	16	622	255	5	26	996	663	26	695	226	−30	0.978	26	865	613	26	1716	981	98	< 0.001	< 0.001
	3	18	565	287	18	982	925	74	16	903	548	16	1063	686	18	0.999	13	896	219	13	3758	2839	320	< 0.001	< 0.001
DWD 100-h	1	12	1002	719	12	1011	581	1	13	1747	1194	13	1391	475	−20	0.808	10	1235	994	10	1897	944	54	0.011	0.048
	2	16	958	575	16	772	437	−19	26	1217	559	26	1493	800	23	0.297	26	1531	696	26	3690	1883	141	< 0.001	< 0.001
	3	18	956	773	18	1103	1265	15	16	979	833	16	2102	784	115	0.488	13	1620	758	13	7219	4479	346	< 0.001	< 0.001

Change is reported in percentage (%) and calculated as the pre-treatment value minus the post-treatment value, divided by the pre-treatment value; n indicates the number of samples used in the calculations. Treatments include a control (C), prescribed burning (Rx), and mechanical cut-and-leave treatment (M). P values from analysis of variance testing for treatment effects two years post treatment are reported. P values < 0.05 are in boldface

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