Comparisons of allometric and climate-derived estimates of tree coarse root carbon stocks in forests of the United States

Russell, Matthew B.; Domke, Grant M.; Woodall, Christopher W.; D’Amato, Anthony W.

doi:10.1186/s13021-015-0032-7

Table 1 Equivalence test results (critical threshold of ±25 %) comparing live-tree belowground C estimates from the current US national greenhouse gas inventory (BGC_NGHGI) [13] to adjusted estimates (BGC_ClimAdj)

From: Comparisons of allometric and climate-derived estimates of tree coarse root carbon stocks in forests of the United States

Region	Forest type	n	BGC_NGHGI − BGC_ClimAdj
Region	Forest type	n	Mean difference	Mean % difference	SE difference	Result^a
All regions	All forest types	70,126	−0.58	−5.2	0.01	E
Coastal Alaska	Aspen-Birch	78	−1.71	−34.5	0.16	NE
Coastal Alaska	Fir-Spruce-Mt. Hemlock	342	0.41	3.4	0.02	E
Coastal Alaska	Hemlock-Sitka Spruce	571	2.75	10.6	0.07	E
Coastal Alaska	Minor types and nonstocked	85	−0.77	−13.8	0.13	NE
Coastal Alaska	Spruce-Fir	105	−0.60	−23.0	0.05	NE
Northeast	Aspen-Birch	367	−1.58	−18.2	0.05	E
Northeast	Elm-Ash-Cottonwood	205	−1.76	−16.9	0.08	NE
Northeast	Maple-Beech-Birch	3845	−1.78	−12.8	0.01	E
Northeast	Minor types and nonstocked	346	−0.97	−8.5	0.03	E
Northeast	Oak-Hickory	2509	−1.67	−11.1	0.01	E
Northeast	Oak-Pine	247	−0.68	−5.0	0.02	E
Northeast	Spruce-Fir	900	−0.59	−6.6	0.01	E
Northeast	White-Red-Jack Pine	380	0.00	−0.1	0.00	E
Northern Lake States	Aspen-Birch	2477	−1.82	−28.8	0.02	NE
Northern Lake States	Elm-Ash-Cottonwood	971	−1.91	−22.7	0.04	NE
Northern Lake States	Maple-Beech-Birch	2956	−2.08	−18.1	0.02	E
Northern Lake States	Minor types and nonstocked	460	−0.94	−15.2	0.04	E
Northern Lake States	Oak-Hickory	1845	−2.05	−20.0	0.03	E
Northern Lake States	Spruce-Fir	1854	−0.51	−8.4	0.01	E
Northern Lake States	White-Red-Jack Pine	935	−0.52	−5.5	0.01	E
Northern Prairie States	Elm-Ash-Cottonwood	342	−1.88	−19.0	0.06	NE
Northern Prairie States	Minor types and nonstocked	465	−1.26	−13.0	0.04	E
Northern Prairie States	Oak-Hickory	3265	−1.80	−17.2	0.01	E
Northern Prairie States	Oak-Pine	207	−0.76	−9.0	0.03	E
Northern Prairie States	Ponderosa Pine	164	−0.54	−7.6	0.03	E
Pacific Northwest, Eastside	Douglas-fir	992	0.27	2.3	0.01	E
Pacific Northwest, Eastside	Fir-Spruce-Mt. Hemlock	948	0.82	4.5	0.02	E
Pacific Northwest, Eastside	Lodgepole Pine	571	−0.37	−4.6	0.01	E
Pacific Northwest, Eastside	Minor types and nonstocked	213	−0.91	−33.1	0.09	NE
Pacific Northwest, Eastside	Other Western Softwoods	505	−0.06	−0.5	0.00	E
Pacific Northwest, Eastside	Ponderosa Pine	1446	−0.36	−4.2	0.01	E
Pacific Northwest, Eastside	Western Larch	136	0.65	4.3	0.03	E
Pacific Northwest, Westside	Alder-Maple	226	0.18	0.5	0.01	E
Pacific Northwest, Westside	Douglas-fir	2130	5.79	16.3	0.09	E
Pacific Northwest, Westside	Fir-Spruce-Mt. Hemlock	553	4.27	13.6	0.13	E
Pacific Northwest, Westside	Hemlock-Sitka Spruce	552	6.93	16.7	0.16	E
Pacific Northwest, Westside	Minor types and nonstocked	355	0.28	1.8	0.01	E
Pacific Southwest	California Mixed Conifer	946	2.30	9.9	0.05	E
Pacific Southwest	Douglas-fir	139	4.45	14.1	0.27	E
Pacific Southwest	Fir-Spruce-Mt. Hemlock	243	2.81	10.7	0.12	E
Pacific Southwest	Minor types and nonstocked	116	−0.25	−2.8	0.04	NE
Pacific Southwest	Other Western Softwoods	382	−0.16	−2.3	0.01	E
Pacific Southwest	Pinyon-Juniper	31	−0.57	−26.7	0.12	NE
Pacific Southwest	Ponderosa Pine	242	0.00	0.0	0.00	E
Pacific Southwest	Redwood	64	13.63	22.6	1.62	NE
Pacific Southwest	Tanoak-Laurel	207	1.51	5.6	0.07	E
Pacific Southwest	Western Oak	778	−0.98	−9.9	0.03	E
Rocky Mountain, North	Aspen-Birch	98	−1.46	−32.7	0.15	NE
Rocky Mountain, North	Douglas-fir	1659	−0.11	−1.4	0.00	E
Rocky Mountain, North	Fir-Spruce-Mt. Hemlock	1467	0.00	0.3	0.00	E
Rocky Mountain, North	Lodgepole Pine	828	−0.30	−2.6	0.01	E
Rocky Mountain, North	Minor types and nonstocked	331	−0.70	−45.8	0.06	NE
Rocky Mountain, North	Other Western Softwoods	329	0.23	2.1	0.01	E
Rocky Mountain, North	Ponderosa Pine	499	−0.47	−6.6	0.02	E
Rocky Mountain, North	Western Larch	128	0.26	1.7	0.02	E
Rocky Mountain, South	Aspen-Birch	647	−1.77	−22.4	0.05	NE
Rocky Mountain, South	Douglas-fir	420	−0.41	−3.5	0.01	E
Rocky Mountain, South	Fir-Spruce-Mt. Hemlock	1061	−0.34	−3.4	0.01	E
Rocky Mountain, South	Lodgepole Pine	359	−0.41	−4.0	0.01	E
Rocky Mountain, South	Minor types and nonstocked	166	−0.76	−16.7	0.07	NE
Rocky Mountain, South	Pinyon-Juniper	647	−0.41	−28.9	0.02	NE
Rocky Mountain, South	Ponderosa Pine	924	−0.45	−6.1	0.01	E
Rocky Mountain, South	Woodland Hardwoods	345	−0.78	−40.0	0.05	NE
South Central	Elm-Ash-Cottonwood	737	−1.68	−22.7	0.05	NE
South Central	Loblolly-Shortleaf Pine	3291	0.30	3.3	0.00	E
South Central	Minor types and nonstocked	842	−0.94	−11.6	0.03	E
South Central	Oak-Gum-Cypress	1264	−1.02	−8.1	0.02	E
South Central	Oak-Hickory	5806	−2.61	−32.3	0.03	NE
South Central	Oak-Pine	1093	−0.81	−10.2	0.02	E
South Central	Pinyon-Juniper	298	−0.30	−41.7	0.02	NE
South Central	Woodland Hardwoods	268	−0.28	−59.6	0.02	NE
Southeast	Elm-Ash-Cottonwood	173	−1.22	−12.7	0.07	E
Southeast	Loblolly-Shortleaf Pine	2667	0.39	4.1	0.01	E
Southeast	Longleaf-Slash Pine	1314	0.42	5.2	0.01	E
Southeast	Minor types and nonstocked	286	−0.68	−8.4	0.04	E
Southeast	Oak-Gum-Cypress	1311	−0.68	−5.0	0.01	E
Southeast	Oak-Hickory	3077	−1.34	−10.9	0.01	E
Southeast	Oak-Pine	982	−0.27	−2.5	0.01	E

^aEquivalent (E) or not equivalent (NE)

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ISSN: 1750-0680

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