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

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

Region Forest type n BGCNGHGI − BGCClimAdj
Mean difference Mean % difference SE difference Resulta
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
  1. aEquivalent (E) or not equivalent (NE)