Vázquez, E., Schleuss, PM., Borer, E.T. et al. Nitrogen but not phosphorus addition affects symbiotic N2 fixation by legumes in natural and semi-natural grasslands located on four continents. Plant Soil 478, 689–707 (2022). https://doi.org/10.1007/s11104-022-05498-y
Nitrogen but not phosphorus addition affects symbiotic N₂ fixation by legumes in natural and semi-natural grasslands located on four continents
|Author:||Vázquez, Eduardo1,2; Schleuss, Per-Marten1; Borer, Elizabeth T.3;|
1Department of Soil Ecology, Bayreuth Center of Ecology and Environmental Research (BayCEER), University of Bayreuth, Dr.-Hans-Frisch-Straße 1-3, 95448, Bayreuth, Germany
2Department of Soil and Environment, Swedish University of Agricultural Sciences (SLU), Lennart Hjelms väg 9, 75007, Uppsala, Sweden
3Dept. of Ecology, Evolution, and Behavior, University of Minnesota, St. Paul, MN, 55108, USA
4Centre for Applied Ecology “Prof. Baeta Neves” (CEABN-InBIO), School of Agriculture, University of Lisbon, 1349-017, Lisbon, Portugal
5Forest Research Centre, School of Agriculture, University of Lisbon, 1349-017, Lisbon, Portugal
6German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Puschstrasse 4, 04103, Leipzig, Germany
7Institute of Biology, Leipzig University, Puschstrasse 4, 04103, Leipzig, Germany
8Physiological Diversity, Helmholtz Centre for Environmental Research (UFZ), Permoserstrasse 15, 04318, Leipzig, Germany
9Ecology & Genetics, University of Oulu, PO Box 3000, 90014, Oulu, Finland
10USDA-ARS Grassland Soil and Water Research Laboratory, Temple, TX, 76502, USA
11Institute of Biology / Geobotany and Botanical Garden, Martin Luther University Halle-Wittenberg, Am Kirchtor 1, 06108, Halle, Germany
12Disturbance Ecology, Bayreuth Center of Ecology and Environmental Research (BayCEER), University of Bayreuth, Universitaetsstr. 30, 95447, Bayreuth, Germany
13School of Life Sciences, University of KwaZulu-Natal, Carbis Road, Pietermaritzburg, 3209, South Africa
14Department of Plant and Soil Sciences, University of Kentucky, Lexington, KY, 40546, USA
15Instituto Nacional de Tecnología Agropecuaria (INTA), Universidad Nacional de La Patagonia Austral (UNPA) - CONICET CC 332, CP 9400, Río Gallegos, Santa Cruz, Argentina
16Institute for Land, Water and Society, Charles Sturt University, Albury, NSW, 2640, Australia
17CSIRO Land and Water, 564 Vanderlin Drive, Berrimah, Northern Territory, 0828, Australia
18Swiss Federal Institute for Forest, Snow and Landscape Research WSL, Zuercherstrasse 111, 8903, Birmensdorf, Switzerland
19Harry Butler Institute, Murdoch University, 90 South Street, Murdoch, WA, 6150, Australia
20Lancaster Environment Centre, Lancaster University, Lancaster, LA1 4YQ, UK
|Online Access:||PDF Full Text (PDF, 1.2 MB)|
|Persistent link:|| http://urn.fi/urn:nbn:fi-fe2023071090470
|Publish Date:|| 2023-07-10
Background and aims: The amount of nitrogen (N) derived from symbiotic N₂ fixation by legumes in grasslands might be affected by anthropogenic N and phosphorus (P) inputs, but the underlying mechanisms are not known.
Methods: We evaluated symbiotic N₂ fixation in 17 natural and semi-natural grasslands on four continents that are subjected to the same full-factorial N and P addition experiment, using the ¹⁵N natural abundance method.
Results: N as well as combined N and P (NP) addition reduced aboveground legume biomass by 65% and 45%, respectively, compared to the control, whereas P addition had no significant impact. Addition of N and/or P had no significant effect on the symbiotic N₂ fixation per unit legume biomass. In consequence, the amount of N fixed annually per grassland area was less than half in the N addition treatments compared to control and P addition, irrespective of whether the dominant legumes were annuals or perennials.
Conclusion: Our results reveal that N addition mainly impacts symbiotic N₂ fixation via reduced biomass of legumes rather than changes in N₂ fixation per unit legume biomass. The results show that soil N enrichment by anthropogenic activities significantly reduces N₂ fixation in grasslands, and these effects cannot be reversed by additional P amendment.
Plant and soil
|Pages:||689 - 707|
|Type of Publication:||
A1 Journal article – refereed
|Field of Science:||
1183 Plant biology, microbiology, virology
Open access funding provided by Swedish University of Agricultural Sciences. EV, PMS and MS have been funded by the German Research Foundation through the Emmy Noether-program (grant SP1389/6–1). This work was generated using data from the Nutrient Network (NutNet, https://nutnet.org) experiment, funded at the site-scale by individual researchers. Coordination and data management have been supported by funding to E. Borer and E. Seabloom from the National Science Foundation Research Coordination Network (NSF-DEB-1042132) and Long-Term Ecological Research (NSF-DEB-1234162 and NSF-DEB-1831944 to Cedar Creek LTER) programs, and the Institute on the Environment (DG-0001–13). We also thank the Minnesota Supercomputer Institute for hosting project data and the Institute on the Environment for hosting Network meetings. AJ acknowledge the German Ministry for Education and Research (BMBF) for funding this research within the Biodiversa project SUSALPS; grant number: FKZ 031B0516C. NE and SH acknowledge support from the German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, funded by the German Research Foundation (FZT 118). MNB also acknowledges funding through FCT contract DL 57/2016/CP1382/CT0030 and the COMPETE program through FEDER and FCT funding UID/BIA/50027/2013 and POCI-01–0145-FEDER-006821 and CEF by UID/AGR/00239/2019.
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