Elevated O3 has stronger effects than CO2 on soil nematode abundances but jointly inhibits their diversity in paddy soils
Wang, Jianqing (Fujian Normal University. Institute of Geography)
Peñuelas, Josep (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Neilson, Roy (The James Hutton Institute. Ecological Sciences)
Leng, Peng (Fujian Normal University. Institute of Geography)
Peguero, Guille (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Nielsen, Uffe N. (Western Sydney University. Hawkesbury Institute for the Environment)
Tan, Yunyan (Fujian Normal University. Institute of Geography)
Shi, Xiuzhen (Fujian Normal University. Institute of Geography)
Zhang, Guoyou (Nanjing University of Information Science & Technology)

Título variante:	Changes in soil nematodes under elevated CO2 and O3
Fecha:	2024
Resumen:	Anthropogenic activities have resulted in rising atmospheric concentrations of carbon dioxide (CO2) and ozone (O3), exerting substantial direct and indirect impacts on soil biodiversity within agroecosystems. Despite the considerable attention given to the individual impacts of elevated CO2 and O3 levels, the combined effects on soil nematode communities have not been extensively explored. In this study, we investigated the interactive effects of elevated CO2 (+200 ppm, eCO2) and O3 (+40 ppb, eO3) levels on the abundance, diversity, and trophic composition of soil nematode communities associated with two rice cultivars (Nanjing 5055, NJ5055 and Wuyujing 3, WYJ3). Our findings revealed that soil nematodes had greater abundances under eO3, whereas eCO2 had no significant impacts. Conversely, both eCO2 and eO3, and their combination led to significant reductions in nematode generic richness, accompanied by a decline in the diversity particularly associated with the WYJ3 cultivar. Moreover, eCO2 and eO3 influenced nematode community composition and environmental factors, particularly for the WYJ3 cultivar. Both eCO2 and eO3 significantly increased soil nitrate levels. The changes in nematode community composition were related to soil nitrate levels, as well as nitrogen and carbon concentrations in rice plant roots. Furthermore, interactions between eCO2 and eO3 significantly impacted soil nematode abundance and trophic composition, revealing intricate consequences for soil nematode communities that transcend predictions based on single-factor experiments. This study unveils the potential impacts posed by eCO2 and eO3 on soil biodiversity mediated by rice cultivars, plant functional characteristics and soil feedback mechanisms, thereby underscoring the complex and interactive outcomes arising from concurrent drivers of climate change within the soil food web.
Ayudas:	Agencia Estatal de Investigación TED2021-132627B-I00 Agencia Estatal de Investigación PID2022-140808NB-I00
Derechos:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, i la comunicació pública de l'obra, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original. No es permet la creació d'obres derivades.
Lengua:	Anglès
Documento:	Article ; recerca ; Versió acceptada per publicar
Materia:	Climate change ; Open-top chamber ; Soil food web ; Soil fauna ; Soil biodiversity
Publicado en:	Journal of environmental management, Vol. 370 (November 2024) , art. 122779, ISSN 1095-8630

DOI: 10.1016/j.jenvman.2024.122779

Disponible a partir de: 2026-11-30 Postprint

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