Pyric herbivory decreases soil denitrification despite increased nitrate availability in a temperate grassland

Múgica Azpilicueta, Leire; Le Roux, Xavier; San Emeterio Garciandía, Leticia; Cantarel, Amélie; Durán Lázaro, María; Gervaix, Jonathan; Creuzé des Châtelliers, Charline; Canals Tresserras, Rosa María

Pyric herbivory decreases soil denitrification despite increased nitrate availability in a temperate grassland

dc.contributor.author	Múgica Azpilicueta, Leire
dc.contributor.author	Le Roux, Xavier
dc.contributor.author	San Emeterio Garciandía, Leticia
dc.contributor.author	Cantarel, Amélie
dc.contributor.author	Durán Lázaro, María
dc.contributor.author	Gervaix, Jonathan
dc.contributor.author	Creuzé des Châtelliers, Charline
dc.contributor.author	Canals Tresserras, Rosa María
dc.contributor.department	Agronomía, Biotecnología y Alimentación	es_ES
dc.contributor.department	Agronomia, Bioteknologia eta Elikadura	eu
dc.contributor.department	Institute on Innovation and Sustainable Development in Food Chain - ISFOOD	en
dc.date.accessioned	2024-10-18T08:58:13Z
dc.date.available	2024-10-18T08:58:13Z
dc.date.issued	2024-07-04
dc.date.updated	2024-10-18T08:43:47Z
dc.description.abstract	Pyric herbivory, the combination of controlled burning and targeted grazing, is an effective strategy for restoring abandoned, shrub-encroached rangelands to open ecosystems. This practice may impact soil nitrogen pools by altering soil nitrification and denitrification rates, and may lead to an increase of nitrogen losses through nitrate leaching and N-gas emissions. This research, located in the south-western Pyrenees, investigated the effects of pyric herbivory on soil nitrification and denitrification potentials and mineral nitrogen content in a gorse-encroached temperate rangeland six months after the burning was implemented. The study included three treatments: high-severity burning plus grazing, low-severity burning plus grazing, and unburned and ungrazed areas (control). We measured soil nitrification and denitrification potentials (net and gross), the limitation of denitrifiers by nitrogen or organic carbon, and the abundance of nitrite- and nitrous oxide-reducing bacteria. Additional soil and vegetation data complemented these measurements. Results showed that pyric herbivory did not significantly affect nitrification potential, which was low and highly variable. However, it decreased gross denitrification potential and nitrous oxide reduction to dinitrogen in high-severely burned areas compared to the control. Denitrification rates directly correlated with microbial biomass nitrogen, soil organic carbon, soil water content and abundance of nirS-harbouring bacteria. Contrary to the expected, soil nitrate availability did not directly influence denitrification despite being highest in burned areas. Overall, the study suggests that pyric herbivory does not significantly affect mid-term nitrification rates in temperate open ecosystems, but may decrease denitrification rates in intensely burned areas. These findings highlight the importance of assessing the potential impacts of land management practices, such as pyric herbivory, on soil nutrient cycling and ecosystem functioning.	en
dc.description.sponsorship	This research was supported by the Spanish Ministry of Science [grant number PID2020-116786RB-C31], the European Regional Development Fund through the Interreg Sudoe Programme [grant number SOE2/P5/E0804], the Spanish Ministry for the Ecological Transition and the Demographic Challenge [COMPAS] and the ECODIV Department from INRAE (France). The COMPAS project is supported by the Biodiversity Foundation of the Ministry for the Ecological Transition and the Demographic Challenge (MITECO) within the framework of the Recovery, Transformation and Resilience Plan (PRTR), funded by the European Union - NextGenerationEU.
dc.format.mimetype	application/pdf	en
dc.format.mimetype	application/msword	en
dc.identifier.citation	Múgica, L., Le Roux X San Emeterio, L., Cantarel, A., Durán, M., Gervaix, J., Creuzé des Châtelliers, C., Canals, R. M. (2024). Pyric herbivory decreases soil denitrification despite increased nitrate availability in a temperate grassland. Journal of Environmental Management, 365, 1-12. https://doi.org/10.1016/j.jenvman.2024.121695.
dc.identifier.doi	10.1016/j.jenvman.2024.121695
dc.identifier.issn	0301-4797
dc.identifier.uri	https://academica-e.unavarra.es/handle/2454/52322
dc.language.iso	eng
dc.publisher	Elsevier
dc.relation.ispartof	Journal of Environmental Management (2024), vol. 365, 121695
dc.relation.projectID	info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2020-116786RB-C31/ES/
dc.relation.publisherversion	https://doi.org/10.1016/j.jenvman.2024.121695
dc.rights	© 2024 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license
dc.rights.accessRights	info:eu-repo/semantics/openAccess
dc.rights.uri	https://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subject	Burning severity	en
dc.subject	Denitrifying enzyme activity	en
dc.subject	Fire	en
dc.subject	Grazing	en
dc.subject	Nitrifying enzyme activity	en
dc.subject	Soil N cycling	en
dc.title	Pyric herbivory decreases soil denitrification despite increased nitrate availability in a temperate grassland	en
dc.type	info:eu-repo/semantics/article
dc.type.version	info:eu-repo/semantics/publishedVersion
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