Woodall C W, Walters B F, Coulston J W, D'Amato A W, Domke G M, Russell M B, Sowers P A
USDA Forest Service, Northern Research Station, Forest Inventory and Analysis Program, St. Paul, MN, USA.
USDA Forest Service, Southern Research Station, Forest Inventory and Analysis Program, Blacksburg, VA, USA.
Sci Rep. 2015 Dec 7;5:17028. doi: 10.1038/srep17028.
Quantifying forest carbon (C) stocks and stock change within a matrix of land use (LU) and LU change is a central component of large-scale forest C monitoring and reporting practices prescribed by the Intergovernmental Panel on Climate Change (IPCC). Using a region-wide, repeated forest inventory, forest C stocks and stock change by pool were examined by LU categories. In eastern US forests, LU change is a substantial component of C sink strength (~37% of forest sink strength) only secondary to that of C accumulation in forests remaining forest where their comingling with other LUs does not substantially reduce sink strength. The strongest sinks of forest C were study areas not completely dominated by forests, even when there was some loss of forest to agriculture/settlement/other LUs. Long-term LU planning exercises and policy development that seeks to maintain and/or enhance regional C sinks should explicitly recognize the importance of maximizing non-forest to forest LU changes and not overlook management and conservation of forests located in landscapes not currently dominated by forests.
在土地利用（LU）及其变化的矩阵中对森林碳（C）储量和储量变化进行量化，是政府间气候变化专门委员会（IPCC）规定的大规模森林碳监测和报告工作的核心组成部分。利用全区域重复森林清查数据，按土地利用类别对森林碳储量和各库的储量变化进行了研究。在美国东部森林中，土地利用变化是碳汇强度的一个重要组成部分（约占森林碳汇强度的37%），仅次于森林中碳积累的作用，即与其他土地利用类型混合存在的森林，其碳汇强度并未大幅降低。森林碳最强的汇是那些没有完全被森林覆盖的研究区域，即使存在一些森林向农业/定居点/其他土地利用类型转变的情况。旨在维持和/或增强区域碳汇的长期土地利用规划活动和政策制定，应明确认识到最大限度地增加非森林向森林土地利用变化的重要性，而不应忽视当前未被森林主导的景观中森林的管理和保护。
