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

0574172 - BÚ 2024 RIV US eng J - Journal Article
Ochoa-Hueso, R. - Delgado-Baquerizo, M. - Risch, A.C. - Pergl, Jan - Vítková, Michaela … Total 78 authors
Bioavailability of Macro and Micronutrients Across Global Topsoils: Main Drivers and Global Change Impacts.
Global Biogeochemical Cycles. Roč. 37, č. 6 (2023), č. článku e2022GB007680. ISSN 0886-6236. E-ISSN 1944-9224
R&D Projects: GA ČR(CZ) GA17-19025S; GA ČR(CZ) GX19-28807X; GA TA ČR(CZ) SS70010001
Institutional support: RVO:67985939
Keywords : terrestrial ecosystems * biogeochemical connections * Plant Root Simulator® [PRS®] probes
OECD category: Soil science
Impact factor: 5.2, year: 2022
Method of publishing: Open access
https://doi.org/10.1029/2022GB007680

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.
Permanent Link: https://hdl.handle.net/11104/0344516