Plant diversity enhances production and downward transport of biodegradable dissolved organic matter

Autor: Janneke Ravenek, Christine Fischer-Bedtke, Gerd Gleixner, Odette González Macé, Tanja Strecker, Cameron Wagg, Christiane Roscher, Liesje Mommer, Vanessa-Nina Roth, Alexandru Milcu, Bernhard Schmid, Thorsten Dittmar, Stefan Scheu, Alexandra Weigelt, Nico Eisenhauer, Anke Hildebrandt, Natalie J. Oram, Markus Lange
Přispěvatelé: Max Planck Institute for Biogeochemistry (MPI-BGC), Max-Planck-Gesellschaft, Thüringer Landesamt für Umwelt und Geologie, German Centre for Integrative Biodiversity Research (iDiv), Leipzig University, Helmholtz Zentrum für Umweltforschung = Helmholtz Centre for Environmental Research (UFZ), Institute for Chemistry and Biology of the Marine Environment (ICBM), University of Oldenburg, Helmholtz Institute for Functional Marine Biodiversity at the University of Oldenburg (HIFMB), Carl Von Ossietzky Universität Oldenburg = Carl von Ossietzky University of Oldenburg (OFFIS), Friedrich-Schiller-Universität = Friedrich Schiller University Jena [Jena, Germany], Johann-Friedrich Blumenbach Institut für Zoologie und Anthropologie, Georg-August-University = Georg-August-Universität Göttingen, Écotron Européen de Montpellier, Centre National de la Recherche Scientifique (CNRS), Centre d’Ecologie Fonctionnelle et Evolutive (CEFE), Université Paul-Valéry - Montpellier 3 (UPVM)-École Pratique des Hautes Études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD [France-Sud])-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut Agro - Montpellier SupAgro, Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro), Nature Conservation and Plant Ecology Group, Wageningen University and Research [Wageningen] (WUR), Soil Biology Group, Institute for Water and Wetland Research, Radboud University Nijmegen, Universität Zürich [Zürich] = University of Zurich (UZH), Department of Systematic Botany and Functional Biodiversity, Universität Leipzig, University of Zurich, Vries, Franciska, Lange, Markus, Université Paul-Valéry - Montpellier 3 (UPVM)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD [France-Sud])-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)
Jazyk: angličtina
Rok vydání: 2020
Předmět:
0106 biological sciences
Evolution
ecosystem functions and services
Plant Ecology and Nature Conservation
plant–soil interactions
Plant Science
010603 evolutionary biology
01 natural sciences
bioDiversity
Subsoil
Behavior and Systematics
vegetation
1110 Plant Science
subsoil
Dissolved organic carbon
Ecosystem
Plant–soil interactions
910 Geography & travel
ComputingMilieux_MISCELLANEOUS
Ecology
Evolution
Behavior and Systematics
biodiversity
2. Zero hunger
Ecosystem functions and services
Topsoil
Decomposition
decomposition
Vegetation
Ecology
Soil organic matter
Plant Ecology
food and beverages
Plant community
15. Life on land
PE&RC
dissolved organic carbon
10122 Institute of Geography
1105 Ecology
Evolution
Behavior and Systematics
Environmental chemistry
Soil water
Plantenecologie en Natuurbeheer
Soil horizon
Environmental science
Soil fertility
[SDE.BE]Environmental Sciences/Biodiversity and Ecology
2303 Ecology
human activities
010606 plant biology & botany
Zdroj: Journal of Ecology
Journal of Ecology, 2020, ⟨10.1111/1365-2745.13556⟩
EPIC3Journal of Ecology, WILEY-BLACKWELL PUBLISHING, ISSN: 0022-0477
Journal of Ecology 109 (2021) 3
Journal of Ecology, 109(3), 1284-1297
Journal of Ecology, Wiley, 2020, ⟨10.1111/1365-2745.13556⟩
ISSN: 0022-0477
1365-2745
Popis: International audience; Plant diversity is an important driver of below-ground ecosystem functions, such as root growth, soil organic matter (SOM) storage and microbial metabolism, mainly by influencing the interactions between plant roots and soil. Dissolved organic matter (DOM), as the most mobile form of SOM, plays a crucial role for a multitude of soil processes that are central for ecosystem functioning. Thus, DOM is likely to be an important mediator of plant diversity effects on soil processes. However, the relationships between plant diversity and DOM have not been studied so far.2. We investigated the mechanisms underlying plant diversity effects on concentrations of DOM using continuous soil water sampling across 6 years and 62 plant communities in a long-term grassland biodiversity experiment in Jena, Germany. Furthermore, we investigated plant diversity effects on the molecular properties of DOM in a subset of the samples.3. Although DOM concentrations were highly variable over the course of the year with highest concentrations in summer and autumn, we found that DOM concentrations consistently increased with plant diversity across seasons. The positive plant diversity effect on DOM concentrations was mainly mediated by increased microbial activity and newly sequestered carbon in topsoil. However, the effect of soil microbial activity on DOM concentrations differed between seasons, indicating DOM consumption in winter and spring, and DOM production in summer and autumn. Furthermore, we found increased contents of small and easily decomposable DOM molecules reaching deeper soil layers with high plant diversity.4. Synthesis. Our findings suggest that plant diversity enhances the continuous downward transport of DOM in multiple ways. On the one hand, higher plant diversity results in higher DOM concentrations, on the other hand, this DOM is less degraded. This study indicates, for the first time, that higher plant diversity enhances the downward transport of dissolved molecules that likely stimulate soil development in deeper layers and therefore increase soil fertility.
Databáze: OpenAIRE
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