The fern economics spectrum is unaffected by the environment
The fern economics spectrum is unaffected by the environment
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DOI：
10.1111/pce.14428
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发表时间：
2022-09-08
影响因子：
7.3
通讯作者：
Cheng，Dongliang
中科院分区：
文献类型：
--
作者：
Li，Jinlong;Chen，Xiaoping;Cheng，Dongliang
植物经济学谱描述了植物资源获取和储存之间的权衡，并揭示了植物对环境变化的反应。然而，用于构建植物经济学谱的数据主要来自种子植物，从而忽略了蕨类植物等维管非种子植物谱系。为了解决这一遗漏，我们利用生活在光强和养分梯度不同的三种亚热带森林条件下的 23 种蕨类植物的叶和根性状，评估了是否存在蕨类植物经济谱。发现蕨类植物的叶和根性状高度相关，并形成了植物经济学谱。发现比叶质量和根组织密度位于光谱的一侧（保守策略），而光合作用速率、比根面积和比根长度位于光谱的另一侧（获取策略）。蕨类植物在强光条件下具有较高的光合作用和呼吸速率以及光合氮素利用效率，在高营养环境下具有较高的比根面积和较低的根组织密度。然而，环境变化并没有显着影响他们的资源获取策略。因此，植物经济学范围可以扩大到包括蕨类植物，从而扩大了其系统发育和生态的影响和效用。
The plant economics spectrum describes the trade‐off between plant resource acquisition and storage, and sheds light on plant responses to environmental changes. However, the data used to construct the plant economics spectrum comes mainly from seed plants, thereby neglecting vascular non‐seed plant lineages such as the ferns. To address this omission, we evaluated whether a fern economics spectrum exists using leaf and root traits of 23 fern species living under three subtropical forest conditions differing in light intensity and nutrient gradients. The fern leaf and root traits were found to be highly correlated and formed a plant economics spectrum. Specific leaf mass and root tissue density were found to be on one side of the spectrum (conservative strategy), whereas photosynthesis rate, specific root area, and specific root length were on the other side of the spectrum (acquisitive strategy). Ferns had higher photosynthesis and respiration rates, and photosynthetic nitrogen‐use efficiency under high light conditions and higher specific root area and lower root tissue density in high nutrient environments. However, environmental changes did not significantly affect their resource acquisition strategies. Thus, the plant economics spectrum can be broadened to include ferns, which expands its phylogenetic and ecological implications and utility.