Effects of forest ownership and change on forest harvest rates, types and trends in northern Maine
Effects of forest ownership and change on forest harvest rates, types and trends in northern Maine
复制标题
森林所有权及其变化对缅因州北部森林采伐率、类型和趋势的影响
DOI：
10.1016/j.foreco.2006.03.009
复制
发表时间：
2006
影响因子：
3.7
通讯作者：
S. Sader
中科院分区：
文献类型：
--
作者：
Suming Jin;S. Sader
对1994年、2000年和2004年的森林所有权图与土地覆盖图(1990年代初)和从陆地卫星图像提取的森林变化探测图(1991年、2000年、2004年)进行了分析。在1994至2000年间，缅因州北部研究地区约80%的工业森林所有权易手。其中约75%的林地卖给了木材投资管理组织(TIMOS)，25%卖给了其他工业所有者。1994年至2004年，非政府组织和Logger/短期投资者从工业和TIMO卖家手中购买了较小的林地。陆地卫星变化检测方法表明，土地所有者倾向于采伐软木和软木的总体趋势--1980年代为硬木，1990年代为软木-硬木和硬木-软木林分，2000-2004年间四种森林类型的比例接近平衡；然而，这些趋势在不同的土地所有者之间有所不同。工业所有制类型在20世纪80年代收获了最高比例的森林，但在90年代和21世纪初没有。在1990年代和2000年代初，TIMOS和LDS采伐了较高比例的森林，而非政府组织采伐的较少。随着时间的推移，非工业专用林(NIPF)拥有更稳定的所有权，并且随着时间的推移，具有更平等和中等的收获率。没有发生所有权变化的林地的收获率明显低于1994年至2000年期间发生所有权变化的林地。考虑到过去的采伐率和林地目前的构成，2004年工业所有权的平均森林干扰轮伐期估计为51年，而国家森林保护框架林地的平均轮伐期为70年。
Forest ownership maps from 1994, 2000 and 2004 were analyzed with land cover maps (early 1990s) and forest change detection maps derived from Landsat imagery (1991, 2000, 2004). Between 1994 and 2000, roughly 80% of the Industrial forest ownership in a northern Maine study area changed hands. Approximately 75% of these forestlands were sold to Timber Investment Management Organizations (TIMOs) and 25% to other Industrial owners. Non-Government Organizations (NGOs) and Logger/Short-term Investors (LDs) purchased smaller parcels of forestland from the Industrial and TIMO sellers, from 1994 to 2004. Landsat change detection methods indicated a general trend in landowners’ preference to harvest softwood and softwood–hardwood in the 1980s, softwood–hardwood and hardwood–softwood stands in the 1990s, and nearly a balanced proportion of four forest types between 2000 and 2004; however, these trends varied among individual landowners. Industrial ownership type harvested the highest percentage of forest in the 1980s, but not in the 1990s and early 2000s. The TIMOs and LDs harvested a higher percentage of forest in the 1990s and early 2000s, while the NGOs harvested less. The Non-Industrial Private Forest (NIPF) held more stable ownership through time and had more equal and intermediate harvest rates through time. Forest land that experienced no ownership change had significantly lower harvest rates than land that changed ownership between 1994 and 2000. Given the rates of past harvesting and current composition of forestland, the estimated average forest disturbance rotation on the 2004 Industrial ownership would be 51 years, compared to 70 years for NIPF forestlands.