Department of Natural Resources and the Environment, University of New Hampshire, Durham, NH 03824, USA.
Environ Manage. 2010 Feb;45(2):377-86. doi: 10.1007/s00267-009-9408-3. Epub 2009 Dec 5.
This study utilizes remote sensing derived forest aboveground biomass (AGB) estimates and ownership information obtained from the Protected Areas Database (PAD), combining landscape analyses and GIS techniques to demonstrate how different ownerships (public, regulated private, and other private) relate to the spatial distribution of AGB in New England states of the USA. "Regulated private" lands were dominated by lands in Maine covered by a Land Use Regulatory Commission. The AGB means between all pairs of the identified ownership categories were significantly different (P < 0.05). Mean AGB observed in public lands (156 Mg/ha) was 43% higher than that in regulated private lands (109 Mg/ha), or 30% higher than that of private lands as a whole. Seventy-seven percent of the regional forests (or about 9,300 km(2)) with AGB >200 Mg/ha were located outside the area designated in the PAD and concentrated in western MA, southern VT, southwestern NH, and northwestern CT. While relatively unfragmented and high-AGB forests (>200 Mg/ha) accounted for about 8% of total forested land, they were unevenly proportioned among the three major ownership groups across the region: 19.6% of the public land, 0.8% of the regulated private land, and 11.0% of the other private land. Mean disturbance rates (in absolute value) between 1992 and 2001 were 16, 66, and 19 percent, respectively, on public, regulated private, and other private land. This indicates that management practices from different ownerships have a strong impact on dynamic changes of landscape structures and AGB distributions. Our results may provide insight information for policy makers on issues regarding forest carbon management, conservation biology, and biodiversity studies at regional level.
本研究利用遥感衍生的森林地上生物量（AGB）估计值和从保护区数据库（PAD）获得的所有权信息，结合景观分析和 GIS 技术，展示了不同所有权（公共、受管制的私人和其他私人）与美国新英格兰各州 AGB 空间分布的关系。“受管制的私人”土地主要由缅因州受土地使用监管委员会监管的土地组成。所有确定的所有权类别之间的 AGB 平均值差异显著（P<0.05）。公共土地上观察到的平均 AGB（156 Mg/ha）比受管制的私人土地（109 Mg/ha）高 43%，或比整个私人土地高 30%。区域内 77%（约 9300 km²）的 AGB>200 Mg/ha 的森林位于 PAD 划定的区域之外，集中在马萨诸塞州西部、佛蒙特州南部、新罕布什尔州西南部和康涅狄格州西北部。虽然相对完整和高 AGB（>200 Mg/ha）的森林占总林地的 8%左右，但它们在该地区的三个主要所有权群体之间的分配并不均衡：公共土地的 19.6%，受管制的私人土地的 0.8%，和其他私人土地的 11.0%。1992 年至 2001 年期间，公共、受管制的私人和其他私人土地上的平均干扰率（绝对值）分别为 16%、66%和 19%。这表明，来自不同所有权的管理实践对景观结构和 AGB 分布的动态变化有强烈影响。我们的研究结果可能为决策者提供有关森林碳管理、保护生物学和生物多样性研究等问题的有见地的信息。
