Arbuscular mycorrhiza has little influence on N2O potential emissions compared to plant diversity in experimental plant communities

2019 ◽  
Vol 96 (2) ◽  
Author(s):  
Simon T Okiobe ◽  
Matthias C Rillig ◽  
Magkdi Mola ◽  
Jürgen Augustin ◽  
Gerald Parolly ◽  
...  

ABSTRACT Denitrification is an ecosystem process linked to ongoing climate change, because it releases nitrous oxide (N2O) into the atmosphere. To date, the literature covers mostly how aboveground (i.e. plant community structure) and belowground (i.e. plant-associated soil microbes) biota separately influence denitrification in isolation of each other. We here present a mesocosm experiment where we combine a manipulation of belowground biota (i.e. addition of Rhizophagus irregularis propagules to the indigenous mycorrhizal community) with a realized gradient in plant diversity. We used a seed mix containing plant species representative of mesophytic European grasslands and by stochastic differences in species establishment across the sixteen replicates per treatment level a spontaneously established gradient in plant diversity. We address mycorrhizal-induced and plant-diversity mediated changes on denitrification potential parameters and how these differ from the existing literature that studies them independently of each other. We show that unlike denitrification potential, N2O potential emissions do not change with mycorrhiza and depend instead on realized plant diversity. By linking mycorrhizal ecology to an N-cycling process, we present a comprehensive assessment of terrestrial denitrification dynamics when diverse plants co-occur.

2021 ◽  
Vol 770 ◽  
pp. 144730
Author(s):  
Lili Rong ◽  
Xiaohu Wu ◽  
Jun Xu ◽  
Fengshou Dong ◽  
Xingang Liu ◽  
...  

BMC Ecology ◽  
2016 ◽  
Vol 16 (1) ◽  
Author(s):  
Katja Steinauer ◽  
Britta Jensen ◽  
Tanja Strecker ◽  
Enrica de Luca ◽  
Stefan Scheu ◽  
...  

Forests ◽  
2020 ◽  
Vol 11 (10) ◽  
pp. 1027
Author(s):  
Dandan Qi ◽  
Fujuan Feng ◽  
Yanmei Fu ◽  
Ximei Ji ◽  
Xianfa Liu

Microbes, as important regulators of ecosystem processes, play essential roles in ecosystem recovery after disturbances. However, it is not clear how soil microbial communities and functions change and affect forest recovery after clear-cutting. Here, we used metagenome sequencing to systematically analyse the differences in soil microbial community composition, functions, and nitrogen (N) cycling pathways between primary Korean pine forests (PF) and secondary broad-leaved forests (SF) formed after clear-cutting. Our results showed that the dominant phyla of the two forest types were consistent, but the relative abundance of some phyla was significantly different. Meanwhile, at the genus level, the fold-changes of rare genera were larger than the dominant and common genera. The genes related to microbial core metabolic functions, virulence factors, stress response, and defence were significantly enriched in SF. Additionally, based on the relative abundance of functional genes, a schema was proposed to analyse the differences in the whole N cycling processes between the two forest types. In PF, the stronger ammoniation and dissimilatory nitrate reduction (DNRA) and the weaker nitrification provided a genetic explanation for PF dominated by ammonium (NH4+) rather than nitrate (NO3−). In SF, the weaker DNRA, the stronger nitrification and denitrification, the higher soil available phosphorus (AP), and the lower nitrogen to phosphorus ratio (N/P) comprehensively suggested that SF was faced with a greater degree of N limitation. These results offer insights into the potential relationship between soil microbes and forest recovery, and aid in implementing proper forestry management.


Ecology ◽  
2010 ◽  
Vol 91 (12) ◽  
pp. 3620-3630 ◽  
Author(s):  
Christopher M. Clark ◽  
David Tilman
Keyword(s):  

2010 ◽  
Vol 98 (6) ◽  
pp. 1379-1388 ◽  
Author(s):  
Deborah Scharfy ◽  
Sabine Güsewell ◽  
Mark O. Gessner ◽  
Harry Olde Venterink

2008 ◽  
Vol 11 (3) ◽  
pp. 296-310 ◽  
Author(s):  
Marcel G. A. van der Heijden ◽  
Richard D. Bardgett ◽  
Nico M. van Straalen

Ecology ◽  
2011 ◽  
Vol 92 (2) ◽  
pp. 296-303 ◽  
Author(s):  
Stefan A. Schnitzer ◽  
John N. Klironomos ◽  
Janneke HilleRisLambers ◽  
Linda L. Kinkel ◽  
Peter B. Reich ◽  
...  

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