Foliar nitrogen in relation to plant traits and reflectance properties of New Hampshire forests.
Foliar nitrogen in relation to plant traits and reflectance properties of New Hampshire forests.
复制标题
叶面氮与新罕布什尔州森林植物性状和反射特性的关系。
DOI：
10.1139/cjfr-2012-0324
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发表时间：
2013
影响因子：
2.2
通讯作者：
F. WickleinHaley
中科院分区：
文献类型：
--
作者：
B. SullivanFranklin;V. OllingerScott;E. MartinMary;J. DuceyMark;C. LepineLucie;F. WickleinHaley
最近的一些研究表明，北美森林叶片中氮的质量基浓度（%N）与冠层近红外反射率（NIRr）和仲夏短波反照率呈正相关。了解这种关系背后的机制将有助于解释遥感图像，并提高我们在未来环境条件下预测反射率变化的能力。本研究的目的是研究叶片和冠层尺度上的叶片氮与已知影响近红外散射和反射率的叶片和冠层尺度结构特征的共变程度。为了实现这一目标，我们比较了17个混合温带林分的叶片和冠层特征与反射光谱。结果表明，在叶片和冠层尺度上，%N与NIRr呈显著正相关。在冠层尺度上，%N和NIRr与许多结构性状以及落叶和枯草的比例丰度相关。
Several recent studies have shown that the mass-based concentration of nitrogen in foliage (%N) is positively correlated with canopy near-infrared reflectance (NIRr) and midsummer shortwave albedo across North American forests. Understanding the mechanisms behind this relationship would aid in interpretation of remote sensing imagery and improve our ability to predict changes in reflectance under future environmental conditions. The purpose of this study was to investigate the extent to which foliar nitrogen at leaf and canopy scales covary with leaf- and canopy-scale structural traits that are known to influence NIR scattering and reflectance. To accomplish this, we compared leaf and canopy traits with reflectance spectra at 17 mixed temperate forest stands. We found significant positive associations among %N and NIRr at both the leaf and canopy scale. At the canopy scale, both %N and NIRr were correlated with a number of structural traits as well as with the proportional abundance of deciduous and everg...