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研究揭示陆地生态系统功能的三大主轴
2021-09-24 14:30

德国马克斯·普朗克生物地球化学研究所Markus Reichstein等研究人员合作揭示陆地生态系统功能的三大轴。2021年9月22日,国际知名学术期刊《自然》在线发表了这一成果。

研究人员从主要陆地生物群落的地表气体交换测量数据集中得出了一套生态系统功能。研究人员发现,生态系统功能中的大部分变化(71.8%)由三个关键的轴来体现。第一个轴反映了最大的生态系统生产力,主要由植被结构解释。第二条轴反映了生态系统的水利用策略,并由植被高度和气候的变化共同解释。第三条轴代表生态系统的碳利用效率,具有与干旱有关的梯度,主要由植被结构的变化来解释。

结果表明,两个最先进的陆地表面模型再现了生态系统功能的第一个和最重要的轴。然而,这些模型倾向于模拟比观察到的更强的相关功能,这限制了它们准确预测陆地生态系统中碳、水和能量循环环境变化的全部反应的能力。

据悉,叶经济谱和植物形态和功能的全球谱揭示了植物性状变异的基本轴,它代表了植物物种进化发展所形成的不同生态策略。生态系统功能取决于环境条件和构成生态群落的物种性状。然而,生态系统功能的变异轴在很大程度上是未知的,这限制了人们对生态系统作为一个整体如何应对人为因素、气候和环境变异的理解。

附:英文原文

Title: The three major axes of terrestrial ecosystem function

Author: Migliavacca, Mirco, Musavi, Talie, Mahecha, Miguel D., Nelson, Jacob A., Knauer, Jrgen, Baldocchi, Dennis D., Perez-Priego, Oscar, Christiansen, Rune, Peters, Jonas, Anderson, Karen, Bahn, Michael, Black, T. Andrew, Blanken, Peter D., Bonal, Damien, Buchmann, Nina, Caldararu, Silvia, Carrara, Arnaud, Carvalhais, Nuno, Cescatti, Alessandro, Chen, Jiquan, Cleverly, Jamie, Cremonese, Edoardo, Desai, Ankur R., El-Madany, Tarek S., Farella, Martha M., Fernndez-Martnez, Marcos, Filippa, Gianluca, Forkel, Matthias, Galvagno, Marta, Gomarasca, Ulisse, Gough, Christopher M., Gckede, Mathias, Ibrom, Andreas, Ikawa, Hiroki, Janssens, Ivan A., Jung, Martin, Kattge, Jens, Keenan, Trevor F., Knohl, Alexander, Kobayashi, Hideki, Kraemer, Guido, Law, Beverly E., Liddell, Michael J., Ma, Xuanlong, Mammarella, Ivan, Martini, David, Macfarlane, Craig, Matteucci, Giorgio, Montagnani, Leonardo, Pabon-Moreno, Daniel E., Panigada, Cinzia, Papale, Dario, Pendall, Elise, Penuelas, Josep, Phillips, Richard P., Reich, Peter B., Rossini, Micol, Rotenberg, Eyal, Scott, Russell L., Stahl, Clement, Weber, Ulrich, Wohlfahrt, Georg, Wolf, Sebastian, Wright, Ian J., Yakir, Dan, Zaehle, Snke, Reichstein, Markus

Issue&Volume: 2021-09-22

Abstract: The leaf economics spectrum1,2 and the global spectrum of plant forms and functions3 revealed fundamental axes of variation in plant traits, which represent different ecological strategies that are shaped by the evolutionary development of plant species2. Ecosystem functions depend on environmental conditions and the traits of species that comprise the ecological communities4. However, the axes of variation of ecosystem functions are largely unknown, which limits our understanding of how ecosystems respond as a whole to anthropogenic drivers, climate and environmental variability4,5. Here we derive a set of ecosystem functions6 from a dataset of surface gas exchange measurements across major terrestrial biomes. We find that most of the variability within ecosystem functions (71.8%) is captured by three key axes. The first axis reflects maximum ecosystem productivity and is mostly explained by vegetation structure. The second axis reflects ecosystem water-use strategies and is jointly explained by variation in vegetation height and climate. The third axis, which represents ecosystem carbon-use efficiency, features a gradient related to aridity, and is explained primarily by variation in vegetation structure. We show that two state-of-the-art land surface models reproduce the first and most important axis of ecosystem functions. However, the models tend to simulate more strongly correlated functions than those observed, which limits their ability to accurately predict the full range of responses to environmental changes in carbon, water and energy cycling in terrestrial ecosystems7,8.

DOI: 10.1038/s41586-021-03939-9

Source: https://www.nature.com/articles/s41586-021-03939-9

Nature:《自然》,创刊于1869年。隶属于施普林格·自然出版集团,最新IF:43.07
官方网址:http://www.nature.com/
投稿链接:http://www.nature.com/authors/submit_manuscript.html


本期文章:《自然》:Online/在线发表

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