Long - term N - addition alters the community structure of functionally important N - cycling soil microorganisms across global grasslands

Anthropogenic nitrogen (N) input is known to alter the soil microbiome, but how N enrichment influences the abundance, alpha-diversity and community structure of N-cycling functional microbial communities in grass-lands remains poorly understood. Here, we collected soils from plant communities subje...

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Otros Autores: Frey, Beat, Moser, Barbara, Tytgat, Bjorn, Zimmermann, Stephan, Alberti, Juan, Biederman, Lori, Borer, Elizabeth T., Broadbent, Arthur A. D., Caldeira, María C., Davies, Kendi F., Eisenhauer, Nico, Eskelinen, Anu, Fay, Philip A., Hagedorn, Frank, Hautier, Yann, MacDougall, Andrew S., McCulley, Rebecca L., Moore, Joslin L., Nepel, Maximilian, Power, Sally A., Seabloom, Eric W., Vázquez, Eduardo, Virtanen, Risto, Yahdjian, María Laura, Risch, Anita C.
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Acceso en línea:http://ri.agro.uba.ar/files/intranet/articulo/2023frey.pdf
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245 0 0 |a Long - term N - addition alters the community structure of functionally important N - cycling soil microorganisms across global grasslands 
520 |a Anthropogenic nitrogen (N) input is known to alter the soil microbiome, but how N enrichment influences the abundance, alpha-diversity and community structure of N-cycling functional microbial communities in grass-lands remains poorly understood. Here, we collected soils from plant communities subjected to up to 9 years of annual N-addition (10 g N m− 2 per year using urea as a N-source) and from unfertilized plots (control) in 30 grasslands worldwide spanning a large range of climatic and soil conditions. We focused on three key microbial groups responsible for two essential processes of the global N cycle: N2 fixation (soil diazotrophs) and nitrification (AOA: ammonia-oxidizing archaea and AOB: ammonia-oxidizing bacteria). We targeted soil diazotrophs, AOA and AOB using Illumina MiSeq sequencing and measured the abundance (gene copy numbers) using quantitative PCR. N-addition shifted the structure of the diazotrophic communities, although their alpha-diversity and abundance were not affected. AOA and AOB responded differently to N-addition. The abundance and alpha-diversity of AOB increased, and their community structure shifted with N-addition. In contrast, AOA were not affected by N-addition. AOA abundance outnumbered AOB in control plots under conditions of low N availability, whereas N-addition favoured copiotrophic AOB. Overall, N-addition showed a low impact on soil diazotrophs and AOA while effects for AOB communities were considerable. These results reveal that long term N-addition has important ecological implications for key microbial groups involved in two critical soil N cycling processes. Increased AOB abundance and community shifts following N-addition may change soil N cycling, as larger population sizes may promote higher rates of ammonia oxidation and subsequently increase N loss via gaseous and soil N-leaching. These findings bring us a step closer to predicting the responses and feedbacks of microbial-mediated N-cycling processes to long-term anthropogenic N-addition in grasslands. 
650 |2 Agrovoc  |9 26 
653 |a AMMONIA OXIDIZER 
653 |a BIOGEOGRAPHY 
653 |a DIAZOTROPH 
653 |a GRASSLAND 
653 |a N-CYCLING MICROBIAL COMMUNITY 
653 |a N-FERTILIZATION 
653 |a N2-FIXING BACTERIA 
653 |a NIFH 
653 |a NUTRIENT NETWORK (NUTNET) 
653 |a UREA 
700 1 |a Frey, Beat  |u Swiss Federal Institute for Forest, Snow and Landscape Research WSL. Birmensdorf, Switzerland.  |9 77895 
700 1 |a Moser, Barbara  |u Swiss Federal Institute for Forest, Snow and Landscape Research WSL. Birmensdorf, Switzerland.  |9 73469 
700 1 |a Tytgat, Bjorn  |u Ghent University. Department of Biology. Laboratory of Protistology and Aquatic Ecology. Ghent, Belgium.  |9 77903 
700 1 |a Zimmermann, Stephan  |u Swiss Federal Institute for Forest, Snow and Landscape Research WSL. Birmensdorf, Switzerland.  |9 77905 
700 1 |a Alberti, Juan  |u Universidad de Mar del Plata (UNMDP). Instituto de Investigaciones Marinas y Costeras (IIMyC). Mar del Plata, Buenos Aires, Argentina.  |9 77918 
700 1 |a Biederman, Lori  |u Iowa State University. Department of Ecology, Evolution, and Organismal Biology. Iowa, USA.  |9 67338 
700 1 |a Borer, Elizabeth T.  |u University of Minnesota. Department of Ecology, Evolution, and Behavior. Saint Paul, Minnesota, USA.  |9 67290 
700 1 |a Broadbent, Arthur A. D.  |u The University of Manchester. Department of Earth and Environmental Sciences. Manchester, UK.  |9 77908 
700 1 |a Caldeira, María C.  |u Universidade de Lisboa. Instituto Superior de Agronomia. Centro de Estudos Florestais. Lisboa, Portugal.  |9 73767 
700 1 |a Davies, Kendi F.  |u University of Colorado. Department of Ecology and Evolutionary Biology. Boulder, Colorado, USA.  |9 77648 
700 1 |a Eisenhauer, Nico  |u German Centre of Integrative Biodiversity Research (iDiv). Halle-Jena-Leipzig, Leipzig, Germany.  |u Leipzig University. Institute of Biology. Leipzig, Germany.  |9 77907 
700 1 |a Eskelinen, Anu  |u German Centre of Integrative Biodiversity Research (iDiv). Halle-Jena-Leipzig, Leipzig, Germany.  |u Zentrum für Umweltforschung (UFZ). Helmholtz Centre for Environmental Research UFZ. Leipzig, Germany.  |u University of Oulu. Department of Ecology and Genetics. Oulu, Finland.  |9 77909 
700 1 |a Fay, Philip A.  |u United States Department of Agriculture (USDA). Agricultural Research Service (ARS). Grassland, Soil and Water Research Laboratory. Temple, Texas, USA.  |9 67292 
700 1 |a Hagedorn, Frank  |u Swiss Federal Institute for Forest, Snow and Landscape Research WSL. Birmensdorf, Switzerland.  |9 73471 
700 1 |a Hautier, Yann  |u Utrecht University. Department of Biology. Ecology and Biodiversity Group. Utrecht, the Netherlands.  |9 68526 
700 1 |a MacDougall, Andrew S.  |u University of Guelph. Department of Integrative Biology. Guelph, Ontario, Canada.  |9 77910 
700 1 |a McCulley, Rebecca L.  |u University of Kentucky. Department of Plant and Soil Sciences. Lexington, Kentucky, USA.  |9 77911 
700 1 |a Moore, Joslin L.  |u Monash University. School of Biological Sciences. Clayton Campus, Vic., Australia.  |9 77912 
700 1 |a Nepel, Maximilian  |u University of Vienna. Department of Biodiversity Research. Vienna, Austria.  |9 77913 
700 1 |a Power, Sally A.  |u Western Sydney University. Hawkesbury Institute for the Environment. Penrith, NSW, Australia.  |9 77915 
700 1 |a Seabloom, Eric W.  |u University of Minnesota. Department of Ecology, Evolution, and Behavior. Saint Paul, Minnesota, USA.  |9 67817 
700 1 |a Vázquez, Eduardo  |u University of Bayreuth. Department of Soil Ecology. Bayreuth Center of Ecology and Environmental Research (BayCEER). Bayreuth, Germany.  |9 77916 
700 1 |a Virtanen, Risto  |u University of Oulu. Department of Ecology and Genetics. Oulu, Finland.  |9 77917 
700 1 |a Yahdjian, María Laura  |u Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina.  |u CONICET - Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina.  |9 16176 
700 1 |a Risch, Anita C.  |u Swiss Federal Institute for Forest, Snow and Landscape Research WSL. Birmensdorf, Switzerland.  |9 73048 
773 |t Soil Biology and Biochemistry  |g Vol.176 (2023), art.108887,tbls., grafs. 
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