Short-term effects of thinning intensity on scenic beauty values of different stands
Short-term effects of thinning intensity on scenic beauty values of different stands
复制标题
间伐强度对不同林分风景秀丽值的短期影响
DOI：
10.1007/s10310-008-0102-8
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发表时间：
2012
影响因子：
1.5
通讯作者：
Masato Katoh
中科院分区：
文献类型：
--
作者：
Songqiu Deng;Jiafeng Yan;Qingwei Guan;Masato Katoh
我们使用基于个体树冠（ITC）方法的高分辨率机载数据调查了日本的针叶树种植园管理。这项研究首次将该技术应用于日本森林。我们发现森林资源可以在单棵树的层面上进行衡量。我们还制作了扁柏、赤松、落叶松、柳杉、其他针叶树和阔叶树试验点的树冠图，分类准确率为78%。具有树木覆盖类型的林分多边形是根据该地图、树木密度地图和树冠占据区域地图生成的。自动提取林分多边形的森林信息，并与详细的实地调查数据进行比较。我们的 ITC 估计与实地调查数据之间的误差范围为 0.3% 至 30.2%，具体取决于树冠大小、密度和其他因素。对于混合成分和树冠直径≤5.0 m 的高密度林分，误差最高。然而，树冠直径≥6.2 m 的林分误差为11.6% 或更小。因此，该技术最适合没有多层或高密度林分的纯日本针叶树人工林。
We investigated conifer plantation management in Japan using high-resolution airborne data based on an individual tree crown (ITC) approach. This study is the first to apply this technique to Japanese forests. We found that forest resources can be measured at the level of a single tree. We also produced a tree-crown map for a test site withChamaecyparis obtusa,Pinus densiflora,Larix kaempferi,Cryptomeria japonica, other conifers, and broadleaved trees, with a classification accuracy of 78%. Forest-stand polygons with tree-cover types were generated from this map, a tree-density map, and a crown-occupied-area map. Forest information for the stand polygons was extracted automatically and compared with detailed field-survey data. The error between our ITC estimates and the field-survey data ranged from 0.3 to 30.2%, depending on tree crown size, density, and other factors. Errors were highest for high-density stands with mixed compositions and tree crown diameters ≤5.0 m. However, the error for stands with crown diameters ≥6.2 m was 11.6% or less. Therefore, this technique is best suited to pure Japanese conifer plantations without multiple layers or high-density stands.