University of Vermont, Rubenstein School of Environment and Natural Resources, Burlington, Vermont, USA.
USDA Forest Service, Forest Inventory & Analysis, Durham, New Hampshire, USA.
Glob Chang Biol. 2022 Jul;28(13):3991-3994. doi: 10.1111/gcb.16215. Epub 2022 May 10.
Relative frequency distribution of observed annual mortality expressed in aboveground (AG) carbon (C) (Mg CO e ha year ) summarized across supersections by forest type [Hardwood (HW) vs. Softwood (SW)] and site class (Low vs. High) based on approximately 130,000 remeasured USDA Forest Service Forest Inventory and Analysis plots across the US. Top panel summarizes conditions in plots that do and do not meet the California Air Resources Board standards based on total basal area, whereas bottom panel summarizes conditions in plots falling inside and outside of optimum relative density levels. The latter represents a biophysically-informed approach accounting for changes in tree (and carbon) packing over forest development.
根据美国约 13 万次重新测量的美国农业部林务局森林清查和分析图，按林分类型[硬木（HW）与软木（SW）]和林地段类型（低与高），总结地上（AG）碳（C）（Mg CO e ha year ）观测年死亡率的相对频率分布。上面的面板根据总基底面积总结了符合和不符合加利福尼亚空气资源委员会标准的图的情况，而下面的面板总结了处于最佳相对密度水平内外的图的情况。后者代表了一种生物物理上的方法，考虑了树木（和碳）在森林发展过程中的包装变化。
