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Partitioning plant spectral diversity into alpha and beta components
Ecology Letters ( IF 7.6 ) Pub Date : 2019-11-27 , DOI: 10.1111/ele.13429 Etienne Laliberté 1, 2 , Anna K Schweiger 1, 2 , Pierre Legendre 2
Ecology Letters ( IF 7.6 ) Pub Date : 2019-11-27 , DOI: 10.1111/ele.13429 Etienne Laliberté 1, 2 , Anna K Schweiger 1, 2 , Pierre Legendre 2
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Plant spectral diversity – how plants differentially interact with solar radiation – is an integrator of plant chemical, structural, and taxonomic diversity that can be remotely sensed. We propose to measure spectral diversity as spectral variance, which allows the partitioning of the spectral diversity of a region, called spectral gamma (γ) diversity, into additive alpha (α; within communities) and beta (β; among communities) components. Our method calculates the contributions of individual bands or spectral features to spectral γ‐, β‐, and α‐diversity, as well as the contributions of individual plant communities to spectral diversity. We present two case studies illustrating how our approach can identify 'hotspots’ of spectral α‐diversity within a region, and discover spectrally unique areas that contribute strongly to β‐diversity. Partitioning spectral diversity and mapping its spatial components has many applications for conservation since high local diversity and distinctiveness in composition are two key criteria used to determine the ecological value of ecosystems.
中文翻译：
将植物光谱多样性划分为 alpha 和 beta 分量
植物光谱多样性——植物如何与太阳辐射进行不同的相互作用——是可以遥感的植物化学、结构和分类多样性的综合体。我们建议将光谱多样性测量为光谱方差，这允许将一个区域的光谱多样性（称为光谱伽马（γ）多样性）划分为加性 α（α；社区内）和β（β；社区间）分量。我们的方法计算了单个波段或光谱特征对光谱 γ-、β-和 α-多样性的贡献，以及单个植物群落对光谱多样性的贡献。我们提出了两个案例研究，说明我们的方法如何识别一个区域内光谱 α 多样性的“热点”，并发现对 β 多样性有很大贡献的光谱独特区域。
更新日期：2019-11-28
中文翻译：
将植物光谱多样性划分为 alpha 和 beta 分量
植物光谱多样性——植物如何与太阳辐射进行不同的相互作用——是可以遥感的植物化学、结构和分类多样性的综合体。我们建议将光谱多样性测量为光谱方差，这允许将一个区域的光谱多样性（称为光谱伽马（γ）多样性）划分为加性 α（α；社区内）和β（β；社区间）分量。我们的方法计算了单个波段或光谱特征对光谱 γ-、β-和 α-多样性的贡献，以及单个植物群落对光谱多样性的贡献。我们提出了两个案例研究，说明我们的方法如何识别一个区域内光谱 α 多样性的“热点”，并发现对 β 多样性有很大贡献的光谱独特区域。
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