Linkages between tree architectural designs and life-history strategies in a subtropical montane moist forest
Linkages between tree architectural designs and life-history strategies in a subtropical montane moist forest
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亚热带山地潮湿森林中树木建筑设计与生活史策略之间的联系
DOI：
10.1016/j.foreco.2019.01.047
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发表时间：
2019
影响因子：
3.7
通讯作者：
Jiang Mingxi
中科院分区：
文献类型：
--
作者：
Xu Yaozhan;Iida Yoshiko;Huang Haiyan;Shi Zheng;Franklin Scott B;Luo Yiqi;Bao Dachuan;Qiao Xiujuan;Lu Zhijun;Jiang Mingxi
树形结构对最大限度地捕获光至关重要，这取决于单个树木的碳分配，从而决定了物种特定的生长策略。它的变异和相关的生活史策略已经在热带和温带森林中进行了研究，但在亚热带森林中还没有。此外，在热带森林中使用层次贝叶斯模型发现了类似的建筑模式，这与之前的大多数研究不同。本文采用层次贝叶斯模型研究了59种亚热带共生树种的树型差异及其与成虫身高和光照需求的关系。分析了不同种子传播和叶物候类型树种间的结构变异。在亚热带山地森林共发生的59种植物中，大多数物种在最低叶-树高关系（F-H）和冠-树高关系长边（w - h）上表现出相似的结构，但在树高-茎直径关系（H-D）上表现出不同种间的差异。与热带和温带森林相比，中等海拔地区树木的树冠更深、更大。h - h关系的参数在叶片物候和散布类型上存在差异，F-H关系和w1 - h关系的截距在叶片物候上存在差异。体型大的种有更细长的茎，小尺寸的冠较浅和较窄，但大尺寸的冠相似。需光树种的建筑变量与需光量的相关性较弱，但中等大小的树冠较宽。总体而言，亚热带森林中大小相关的建筑分异主要受成虫身高和光照需求驱动。共存物种在光捕获方面表现出不同的生活史策略，这可能为亚热带森林的疏伐和采伐提供选择。59种共发生树种的树结构模型准确地反映了该亚热带森林的三维结构，也为未来的陆地激光扫描（TLS）数据分析提供了支持。
Tree architecture is crucial to maximizing light capture, determined by carbon allocation of individual trees, and consequently characterizes species-specific growth strategies. Its variation and associated life-history strategies have been examined in tropical and temperate forests, but not in subtropical forests. Moreover, a similar architectural pattern was found using a hierarchical Bayesian model in a tropical forest, which differed from most of previous studies. Here, we employed a hierarchical Bayesian model to examine tree architecture differences and associations with adult stature and light requirement among 59 subtropical co-occurring species. Architectural variations among tree species with different seed dispersal and leaf phenology types were analyzed. Most species showed similar architecture in the height of the lowest foliage-tree height relationships (F-H) and the long side of crown- tree height relationships (W1-H), but some species showed interspecific variations in tree height-stem diameter relationships (H-D) among the 59 co-occurring species in the subtropical montane forest. Trees developed deeper and larger crowns at mid-elevation compared to the tropical and temperate forests. Parameters ofH-Drelationship differed in leaf phenology and dispersal types, and intercepts of F-H relationship andW1-Hrelationship differed in leaf phenology. Large-statured species had more slender stems, and shallower and narrower crowns at small sizes, but similar crowns at large sizes. Light-demanding species showed weak correlations between architectural variables and light requirement but exhibited wide crowns at the intermediate sizes. In general, size-dependent architectural differentiation was driven mainly by adult stature and light requirement in subtropical forest. Coexistence species showed different life-history strategies in light capture, which may help provide options in forest thinning and harvesting in subtropical forest. Species-specific tree architectural models of 59 co-occurring species represent three-dimensional (3D) structure of this subtropical forest accurately, but also support for future terrestrial laser scanning (TLS) data analysis.