Bioavailability of Macro and Micronutrients Across Global Topsoils: Main Drivers and Global Change Impacts-猫眼课题宝

DOI：

10.1029/2022gb007680

发表时间：

2023-06

期刊：

Global Biogeochemical Cycles

影响因子：

5.2

通讯作者：

中科院分区：

地球科学1区

文献类型：

作者：

R. Ochoa‐Hueso;M. Delgado‐Baquerizo;A. Risch;L. Ashton;D. Augustine;N. Bélanger;S. Bridgham;A. Britton;V. Bruckman;J. Camarero;G. Cornelissen;J. Crawford;F. Dijkstra;A. Diochon;S. Earl;James Edgerley;H. Epstein;A. Felton;J. Fortier;D. Gagnon;K. Greer;H. Griffiths;C. Halde;H. M. Hanslin;L. Harris;Jeremy A. Hartsock;P. Hendrickson;K. Hovstad;Jia Hu;A. Jani;K. Kent;Deirdre Kerdraon-Byrne;S. Khalsa;D. Lai;F. Lambert;J. M. LaMontagne;Stéphanie Lavergne;B. Lawrence;K. Littke;Abigail C. Leeper;M. Licht;M. Liebig;J. Lynn;Janet E. Maclean;V. Martinsen;M. McDaniel;Anne C. S. McIntosh;J. Miesel;Jim J. Miller;M. Mulvaney;G. Moreno;L. Newstead;R. Pakeman;J. Pergl;B. Pinno;J. Piñeiro;Kathleen Quigley;T. Radtke;Paul B. Reed;V. Rolo;Jennifer A. Rudgers;P. M. Rutherford;E. Sayer;L. Serrano‐Grijalva;M. Strack;Nicole Sukdeo;Andy F. S. Taylor;Benoit Truax;L. Tsuji;Natasja C van Gestel;Brenda M. Vaness;K. Van Sundert;M. Vítková;Robert Weigel;M. Wilton;Y. Yano;Ewing Teen;E. Bremer

了解地球地壳的化学成分是世纪最大的问题之一。100多年后，我们仍然远远没有了解全球表土中元素的生物利用度和空间耦合的全球模式，尽管它们对陆地生态系统的生产力和功能至关重要。在这里，我们测量了来自所有大陆的一系列陆地生态系统的表土（3-8 cm）中13种宏量和微量营养素以及植物毒性元素的生物利用度和耦合（100，000次观测），并响应全球变化操纵（105，000次观测）。为此，我们在每个部位孵育1至4对阴离子和阳离子交换膜，平均时间为53天。最生物可利用的元素（钙，镁，钾）也是最丰富的地壳。生物利用度模式依赖于生物群落，并受pH值、有机质含量和质地、植被和气候等土壤特性的控制。然而，全球变化模拟导致元素的生物利用度发生重大变化。元素是高度耦合的，并且耦合可以通过元素的原子性质来预测，特别是质量、质荷比和二次电离能。偏离可预测的耦合-原子质量关系归因于全球变化和农业。我们的工作说明了表土元素的生物利用度和耦合与环境背景，人类活动和元素的原子性质之间的紧密联系，从而深入增强了我们对地球化学联系的综合理解，这些联系是陆地生态系统在不断变化的世界中的生产力和功能的基础。

Understanding the chemical composition of our planet's crust was one of the biggest questions of the 20th century. More than 100 years later, we are still far from understanding the global patterns in the bioavailability and spatial coupling of elements in topsoils worldwide, despite their importance for the productivity and functioning of terrestrial ecosystems. Here, we measured the bioavailability and coupling of thirteen macro‐ and micronutrients and phytotoxic elements in topsoils (3–8 cm) from a range of terrestrial ecosystems across all continents (∼10,000 observations) and in response to global change manipulations (∼5,000 observations). For this, we incubated between 1 and 4 pairs of anionic and cationic exchange membranes per site for a mean period of 53 days. The most bioavailable elements (Ca, Mg, and K) were also amongst the most abundant in the crust. Patterns of bioavailability were biome‐dependent and controlled by soil properties such as pH, organic matter content and texture, plant cover, and climate. However, global change simulations resulted in important alterations in the bioavailability of elements. Elements were highly coupled, and coupling was predictable by the atomic properties of elements, particularly mass, mass to charge ratio, and second ionization energy. Deviations from the predictable coupling‐atomic mass relationship were attributed to global change and agriculture. Our work illustrates the tight links between the bioavailability and coupling of topsoil elements and environmental context, human activities, and atomic properties of elements, thus deeply enhancing our integrated understanding of the biogeochemical connections that underlie the productivity and functioning of terrestrial ecosystems in a changing world.

Bioavailability of Macro and Micronutrients Across Global Topsoils: Main Drivers and Global Change Impacts

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