A plant-microbe interaction framework explaining nutrient effects on primary production

Autor(en)
Petr Čapek, Stefano Manzoni, Eva Kaštovská, Birgit Wild, Kateřina Diáková, Jiří Bárta, Jörg Schnecker, Christina Biasi, Pertti J Martikainen, Ricardo Jorge Eloy Alves, Georg Guggenberger, Norman Gentsch, Gustaf Hugelius, Juri Palmtag, Robert Mikutta, Olga Shibistova, Tim Urich, Christa Schleper, Andreas Richter, Hana Šantrůčková
Abstrakt

In most terrestrial ecosystems, plant growth is limited by nitrogen and phosphorus. Adding either nutrient to soil usually affects primary production, but their effects can be positive or negative. Here we provide a general stoichiometric framework for interpreting these contrasting effects. First, we identify nitrogen and phosphorus limitations on plants and soil microorganisms using their respective nitrogen to phosphorus critical ratios. Second, we use these ratios to show how soil microorganisms mediate the response of primary production to limiting and non-limiting nutrient addition along a wide gradient of soil nutrient availability. Using a meta-analysis of 51 factorial nitrogen-phosphorus fertilization experiments conducted across multiple ecosystems, we demonstrate that the response of primary production to nitrogen and phosphorus additions is accurately predicted by our stoichiometric framework. The only pattern that could not be predicted by our original framework suggests that nitrogen has not only a structural function in growing organisms, but also a key role in promoting plant and microbial nutrient acquisition. We conclude that this stoichiometric framework offers the most parsimonious way to interpret contrasting and, until now, unresolved responses of primary production to nutrient addition in terrestrial ecosystems.

Organisation(en)
Department für Mikrobiologie und Ökosystemforschung, Department für Ökogenomik und Systembiologie
Journal
Nature Ecology & Evolution
Band
2
Seiten
1588-1596
Anzahl der Seiten
9
ISSN
2397-334X
DOI
https://doi.org/10.1038/s41559-018-0662-8
Publikationsdatum
2018
Publikationsstatus
Veröffentlicht
Peer-reviewed
Ja
ÖFOS 2012
106022 Mikrobiologie, 106026 Ökosystemforschung
Link zum Portal
https://ucris.univie.ac.at/portal/de/publications/a-plantmicrobe-interaction-framework-explaining-nutrient-effects-on-primary-production(b9aa218c-0672-468c-ace5-2b92cd9a765f).html