2008
DOI: 10.1016/j.agrformet.2008.02.011
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Vertical integration of leaf area index in a Japanese deciduous broad-leaved forest

Abstract: Leaf area index (LAI) is an important quantity in the study of forest ecosystems, but field measurements of LAI often contain errors because of the vertical complexity of the forest canopy. In this study, we established a practical method for field measurement of LAI in the canopy of a deciduous broadleaved forest by accounting for its vertical complexity. First, we produced a semiempirical model for the vertical integration of leaf dry mass per unit leaf area. We also quantified the litterfall for each tree s… Show more

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Cited by 86 publications
(71 citation statements)
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“…Photos were automatically taken every 2 min during the day and those from 2004 to 2006 were used [22]. Clear sky condition photographs were selected to calculate LAI.…”
Section: Other Parametersmentioning
confidence: 99%
“…Photos were automatically taken every 2 min during the day and those from 2004 to 2006 were used [22]. Clear sky condition photographs were selected to calculate LAI.…”
Section: Other Parametersmentioning
confidence: 99%
“…The continuous measurement of phenology at high temporal and spatial resolution affords an understanding of trends in vegetation productivity and this could be achieved via aggregation across multiple species or for specific species in selected locations [47]. The ability to focus on species is possible via the manual extraction of areas of interest and would allow a better understanding of the seasonal-gap that exists between species [48], as well as the role of site-specific properties and geographical location [49]. The images captured by these traffic cameras offer extended analysis possibilities, particularly when coupled with similar resolution observations of precipitation and temperature, carbon flux measurements and soil properties [47].…”
Section: Discussionmentioning
confidence: 99%
“…Such studies point to the possibility of using other combinations of spectral channels (e.g., Zhao et [45]). Other suggested research avenues include a focus on understorey vegetation [16,61], though this would not be directly applicable using this network, though at different times of year the leaf area of certain trees may allow "background" vegetation to be observed [48,50]. Another avenue could be to examine the variability in the accuracy with which the phenological dates are captured as a function of the timing of the images used.…”
Section: Discussionmentioning
confidence: 99%
“…参 数 , 是 森 林 生 长 和 演 替 的 重 要 驱 动 因 子 (Berterretche et al, 2005;姚丹丹等, 2015), 与植被 蒸腾、林下蒸发、降雨截留等水文过程和林木生长 等生态过程密切相关 (Granier et al, 2000;Nasahara et al, 2008;Behera et al, 2010), 因而是许多森林生 长及生产力模型、气候模型和水文模型的主要输入 项 (Running & Coughlan, 1988;Cox et al, 1999;Granier et al, 1999), 在关注森林动态结构影响水文 过程的生态水文研究中被看作是重要的水文要素 (Staelens et al, 2006)。由于受林分结构 (Bequet et al, 2012) …”
Section: 叶面积指数(Lai)是描述森林结构特征的重要unclassified