Long-term soil warming decreases microbial phosphorus utilization by increasing abiotic phosphorus sorption and phosphorus losses

verfasst von

Ye Tian, Chupei Shi, Carolina Urbina Malo, Steve Kwatcho Kengdo, Jakob Heinzle, Erich Inselsbacher, Franz Ottner, Werner Borken, Kerstin Michel, Andreas Schindlbacher, Wolfgang Wanek

Abstract

Phosphorus (P) is an essential and often limiting element that could play a crucial role in terrestrial ecosystem responses to climate warming. However, it has yet remained unclear how different P cycling processes are affected by warming. Here we investigate the response of soil P pools and P cycling processes in a mountain forest after 14 years of soil warming (+4 °C). Long-term warming decreased soil total P pools, likely due to higher outputs of P from soils by increasing net plant P uptake and downward transportation of colloidal and particulate P. Warming increased the sorption strength to more recalcitrant soil P fractions (absorbed to iron oxyhydroxides and clays), thereby further reducing bioavailable P in soil solution. As a response, soil microbes enhanced the production of acid phosphatase, though this was not sufficient to avoid decreases of soil bioavailable P and microbial biomass P (and biotic phosphate immobilization). This study therefore highlights how long-term soil warming triggers changes in biotic and abiotic soil P pools and processes, which can potentially aggravate the P constraints of the trees and soil microbes and thereby negatively affect the C sequestration potential of these forests.

Organisationseinheit(en)

Institut für Bodenkunde

Externe Organisation(en)

Universität Wien
Universität Bayreuth
Bundesforschungs- und Ausbildungszentrum für Wald, Naturgefahren und Landschaft (BFW)
Universität für Bodenkultur Wien (BOKU)
Universiteit van Amsterdam (UvA)

Typ

Artikel

Journal

Nature Communications

Band

14

ISSN

2041-1723

Publikationsdatum

16.02.2023

Publikationsstatus

Elektronisch veröffentlicht (E-Pub)

Peer-reviewed

Ja

ASJC Scopus Sachgebiete

Allgemeine Chemie, Allgemeine Biochemie, Genetik und Molekularbiologie, Allgemein, Allgemeine Physik und Astronomie

Ziele für nachhaltige Entwicklung

SDG 13 – Klimaschutzmaßnahmen, SDG 15 – Lebensraum Land

Elektronische Version(en)

https://doi.org/10.1038/s41467-023-36527-8 (Zugang: Offen)