Responses of nitrogen concentrations and pools to multiple environmental change drivers: A meta‐analysis across terrestrial ecosystems
Responses of nitrogen concentrations and pools to multiple environmental change drivers: A meta‐analysis across terrestrial ecosystems
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DOI：
10.1111/geb.12884
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发表时间：
2019-05
影响因子：
6.4
通讯作者：
Kai Yue;Yan Peng;D. Fornara;Koenraad Van Meerbeek;L. Vesterdal;Wanqin Yang;C. Peng;B. Tan;W. Zhou
中科院分区：
文献类型：
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作者：
Kai Yue;Yan Peng;D. Fornara;Koenraad Van Meerbeek;L. Vesterdal;Wanqin Yang;C. Peng;B. Tan;W. Zhou
目的：我们试图了解多种环境变化驱动因素的单独和综合效应如何不同地影响陆地氮（N）浓度和N库，以及这些驱动因素的相互作用主要是拮抗、协同还是相加。地点：世界各地。时代：当代。研究的主要类群：陆地生态系统中的植物、土壤和土壤微生物。方法：我们综合了来自758篇已发表文章的操纵性实地研究的数据，以使用Meta分析来估计关键环境变化驱动因素（二氧化碳浓度升高，变暖，氮添加，磷添加，降雨量增加和干旱）对植物，土壤和土壤微生物氮浓度和池的单独，组合和相互作用的影响。我们通过结构方程模型评估了调节变量对这些效应的影响。研究结果：我们发现，（a）氮浓度和氮库显着影响的个人和多个驱动程序的组合效应，与氮添加（B）这些驱动因子的单独和组合效应在植物中的N浓度和N库之间存在显著差异，但在土壤和微生物中很少;（c）驱动因子对氮浓度和氮库的加性效应比植物、土壤和微生物之间的协同或拮抗效应更为常见;（d）环境和实验因素是这些驱动因子对陆地氮的单独、综合和交互效应的重要调节因素。主要结论：我们的研究结果表明，陆地氮浓度和氮库，特别是那些植物，可以显着影响的个人和环境变化的驱动程序的综合影响，这些驱动程序的交互作用主要是加性的。我们的研究结果是重要的，因为它们有助于模型的发展，以更好地预测如何改变氮的可用性影响生态系统的碳循环在未来的环境变化。
AIM: We sought to understand how the individual and combined effects of multiple environmental change drivers differentially influence terrestrial nitrogen (N) concentrations and N pools and whether the interactive effects of these drivers are mainly antagonistic, synergistic or additive. LOCATION: Worldwide. TIME PERIOD: Contemporary. MAJOR TAXA STUDIED: Plants, soil, and soil microbes in terrestrial ecosystems. METHODS: We synthesized data from manipulative field studies from 758 published articles to estimate the individual, combined and interactive effects of key environmental change drivers (elevated CO₂, warming, N addition, phosphorus addition, increased rainfall and drought) on plant, soil, and soil microbe N concentrations and pools using meta‐analyses. We assessed the influences of moderator variables on these effects through structural equation modelling. RESULTS: We found that (a) N concentrations and N pools were significantly affected by the individual and combined effects of multiple drivers, with N addition (either alone or in combination with another driver) showing the strongest positive effects; (b) the individual and combined effects of these drivers differed significantly between N concentrations and N pools in plants, but seldom in soils and microbes; (c) additive effects of driver pairs on N concentrations and pools were much more common than synergistic or antagonistic effects across plants, soils and microbes; and (d) environmental and experimental factors were important moderators of the individual, combined and interactive effects of these drivers on terrestrial N. MAIN CONCLUSIONS: Our results indicate that terrestrial N concentrations and N pools, especially those of plants, can be significantly affected by the individual and combined effects of environmental change drivers, with the interactive effects of these drivers being mostly additive. Our findings are important because they contribute to the development of models to better predict how altered N availability affects ecosystem carbon cycling under future environmental changes.