Soil ecological stoichiometry synchronously regulates stream nitrogen and phosphorus concentrations and ratios
Liu, Ji (Chinese Academy of Sciences. Institute of Subtropical Agriculture)
Wang, Yi (Ludong University. College of Resources and Environmental Engineering)
Li, Yong (Chinese Academy of Sciences. Institute of Atmospheric Physics)
Peñuelas, Josep (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Zhao, Ying (Ludong University. College of Resources and Environmental Engineering)
Sardans i Galobart, Jordi (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Tetzlaff, Doerthe (Humboldt-Universität zu Berlin. Geographisches Institut)
Liu, Jian (The Norwegian Institute of Bioeconomy Research)
Liu, Xinliang (Chinese Academy of Sciences. Institute of Subtropical Agriculture)
Yuan, Hongzhao (Chinese Academy of Sciences. Institute of Subtropical Agriculture)
Li, Yanyan (Chinese Academy of Sciences. Institute of Subtropical Agriculture)
Chen, Ji (Aarhus University. Department of Agroecology)
Wu, Jinshui (Chinese Academy of Sciences. Institute of Subtropical Agriculture)

Date:	2023
Abstract:	Whether and how to synchronously regulate stream water nitrogen (N) and phosphorus (P) concentrations and ratios is a major challenge for sustainable aquatic functions. Soil carbon (C):N:P ratios influence soil N and P stocks and biogeochemical processes that elicit subsequent substantial impacts on stream water N and P concentrations and ratios. Therefore, bridging soil and stream water with ecological stoichiometry is one of the most promising technologies for improving stream water quality. Here, we quantified the ecological stoichiometry of soil and stream water relationships across nine catchments. Soil C:P ratio was the main driver of water quality, showing negative correlations with stream water N and P concentrations, and positive correlations with the N:P ratio in P-limited catchments. We revealed that soil C:P ratios higher than 97. 8 mol mol-1 are required to achieve the simultaneous regulation of stream water N and P concentrations below the eutrophication threshold and make algal growth P-limited. Furthermore, we found that the relationships between catchment landscape and soil ecological stoichiometry likely provided practical options for regulating soil ecological stoichiometry. Our work highlights that soil ecological stoichiometry can effectively indicate the amount and proportion of soil N and P losses, and can be intervened through rational landscape planning to achieve sustainable aquatic ecosystems in catchments.
Grants:	Agencia Estatal de Investigación PID2019-110521GB-I00 Agència de Gestió d'Ajuts Universitaris i de Recerca 2017/SGR-1005
Rights:	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.
Language:	Anglès
Document:	Article ; recerca ; Versió acceptada per publicar
Published in:	Catena, Vol. 231 (October 2023) , art. 107357, ISSN 1872-6887

DOI: 10.1016/j.catena.2023.107357

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Research literature > UAB research groups literature > Research Centres and Groups (research output) > Experimental sciences > CREAF (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Articles > Research articles
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