Tree crown economics

Tree crown economics
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树冠经济学

DOI:
10.1002/fee.2588
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发表时间:
2023
影响因子:
10.3
通讯作者:
Elmore, Andrew J
Elmore, Andrew J
中科院分区:
环境科学与生态学1区
文献类型:
--
作者:
McNeil, Brenden E;Fahey, Robert T;King, Christopher J;Erazo, Dara A;Heimerl, Ty Z;Elmore, Andrew J

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树木以多种方式响应全球变化,其中许多方式可能与树冠结构相关的适应有关。然而,缺乏能够预测树冠结构适应性重要性和动态的理论,很可能是因为测量单个树冠内树叶的三维排列和方向存在困难。在这里,我们描述了树冠经济理论,并使用新的激光雷达(光探测和测距)仪器、无人机(无人驾驶飞行器)和延时相机图像的测量来确定对该理论的两个预测的支持,即(1)光竞争与用水经济权衡导致三个树冠功能性状(平均叶角、冠层密度和树冠粗糙度)之间的协变性,以及(2)树冠性状可以驱动近红外光谱反射率和相关生态系统功能的时空变异性。树冠经济理论可以补充树叶经济理论,帮助生态学家绘制森林生态系统对全球变化的反应图并建立模型。
Trees respond to global change in myriad ways, many of which may be linked to adaptations relating to tree crown architecture. However, there is a paucity of theory capable of predicting the adaptive importance and dynamics of crown architecture, most likely because of the difficulties involved in measuring the three‐dimensional arrangement and orientation of tree leaves within individual crowns. Here, we describe a theory of tree crown economics, and use measurements from new lidar (light detection and ranging) instruments, UAVs (unoccupied aerial vehicles), and time‐lapse camera imagery to identify support for two predictions of the theory, that (1) a light competition versus water use economic trade‐off drives covariance among three tree crown functional traits (mean leaf angle, crown density, and crown rugosity), and (2) crown traits can drive spatial and temporal variability in near‐infrared spectral reflectance and related ecosystem functions. Tree crown economic theory can complement leaf economic theory in helping ecologists map and model forest ecosystem responses to global change.
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