Morphological plasticity in mangrove trees: salinity-related changes in the allometry of Avicennia germinans
Morphological plasticity in mangrove trees: salinity-related changes in the allometry of Avicennia germinans
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DOI：
10.1007/s00468-014-1044-8
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发表时间：
2014-07
期刊：
影响因子：
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通讯作者：
A. Vovides;J. Vogt;Armin Kollert;U. Berger;Uwe Grueters;R. Peters;A. Lara-Domínguez;J. López‐Portillo-J.
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文献类型：
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作者：
A. Vovides;J. Vogt;Armin Kollert;U. Berger;Uwe Grueters;R. Peters;A. Lara-Domínguez;J. López‐Portillo-J.
形态可塑性有助于植物科普环境条件。异速生长反应的mangroveAvicenniagerminansto增加盐度时，很容易检测到的顶部高度trees.AbstractSeveral研究表明，红树林树木具有高的物种和站点相关的性状异速生长，这表明大的形态可塑性，可能与环境条件有关，但这种变化的原因还没有清楚地了解和系统的量化仍然缺失。这两个方面对于机械地理解森林的发展和功能都是必不可少的。本文利用（1）顶高树（胸径最大的树木，反映了最大限度利用资源时的森林特性）、（2）细径系数（反映了竞争和环境条件）和（3）冠径比，分析了盐度在红树林与白骨壤异速生长关系中的作用。森林科学家处理陆地森林的这些标准工具适用于分析红树林对盐度的塑料反应。第一，树顶高度有助于识别结构性森林特性，而这些特性在研究整个林分时是无法检测到的。第二，我们发现，在盐度高于55 ‰时，树木不那么纤细，与胸径相关的树冠比在低盐度时更宽。我们的研究结果表明，异速生长性状的显着变化与盐度，并反映了可塑性的树木性状在环境变化的反应。了解植物对环境的塑性反应有助于在不断变化的环境中更好地建模、预测和管理森林。
Key MessageMorphological plasticity helps plants to cope to environmental conditions. Allometric responses of the mangroveAvicennia germinansto increasing salinity are easily detectable when focusing on the top height trees.AbstractSeveral studies show that mangrove trees possess high species- and site-related trait allometry, suggesting large morphological plasticity that might be related to environmental conditions, but the causes of such variation are not clearly understood and systematic quantification is still missing. Both aspects are essential for a mechanistic understanding of the development and functioning of forests. We analyzed the role of salinity in the allometric relations of the mangroveAvicennia germinans, using: (1) the top height trees (trees with the largest diameters at breast height, which reflect forest properties at the maximum use of resources); (2) the slenderness coefficient (which indicates competition and environmental conditions); and (3) the crown to DBH ratio. These standard tools for forest scientists dealing with terrestrial forests are suitable to analyze the plastic responses of mangroves to salinity. First, the top height trees help to recognize structural forest properties that are not detectable when studying the whole stand. Second, we found that at salinities above 55 ‰, trees are less slender and develop wider crowns in relation to DBH than when growing at lower salinities. Our results suggest a significant change in allometric traits in relation to salinity, and reflect the plastic responses of tree traits in response to environmental variation. Understanding the plastic responses of plants to their environment can help to better model, predict, and manage forests in changing environments.