Responses of soil organic carbon compounds to phosphorus addition between tropical monoculture and multispecies forests
Li, Yue (Chinese Academy of Sciences. South China Botanical Garden)
Wu, Mengyu (Chinese Academy of Sciences. South China Botanical Garden)
Zhao, Ting (Chinese Academy of Sciences. South China Botanical Garden)
Mou, Zhijian (Chinese Academy of Sciences. South China Botanical Garden)
Li, Tengteng (Chinese Academy of Sciences. South China Botanical Garden)
Zhang, Jing (Chinese Academy of Sciences. South China Botanical Garden)
Wu, Wenjia (Chinese Academy of Sciences. South China Botanical Garden)
Wang, Faming (Chinese Academy of Sciences. South China Botanical Garden)
Zhang, Wei (Chinese Academy of Sciences. South China Botanical Garden)
Wang, Jun (Chinese Academy of Sciences. South China Botanical Garden)
Li, Yingwen (Chinese Academy of Sciences. South China Botanical Garden)
Hui, Dafeng (Tennessee State University. Department of Biological Sciences)
Lambers, Hans (University of Western Australia)
Peñuelas, Josep (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Sardans i Galobart, Jordi (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Liu, Zhanfeng (Chinese Academy of Sciences. South China Botanical Garden)

Date:	2024
Abstract:	Tropical forests are sensitive to nitrogen (N) and phosphorus (P) availability, and under nutrient application the variation of soil organic carbon (SOC) preserving mechanism remains to be explored. To reveal the forest-specific SOC preservation via biochemical selection in response to nutrient application, we investigated a monoculture (Acacia plantation) and a multispecies forest both with chronic fertilization in subtropical regions, and measured specific fingerprints of plant- and microbial-derived C compounds. In addition, to quantify the effect of P application on SOC content among tropical forests, we conducted a meta-analysis by compiling 125 paired measurements in field experiments from 62 studies. In our field experiment, microbial community composition and activity mediated forest-specific responses of SOC compounds to P addition. The shift of community composition from fungi towards Gram-positive bacteria in the Acacia plantation by P addition led to the consumption of microbial residual C (MRC) as C source; in comparison, P addition increased plant species with less complex lignin substrates and induced microbial acquisition for N sources, thus stimulated the decomposition of both plant- and microbial-derived C. Same with our field experiment, bulk SOC content had neutral response to P addition among tropical forests in the meta-analysis, although divergences could happen among experimental durations and secondary tree species. Close associations among SOC compounds with biotic origins and mineral associated organic C (MAOC) in the multispecies forest suggested contributions of both plant- and microbial-derive C to SOC stability. Regarding that fungal MRC closely associated with MAOC and consisted of soil N pool which tightly coupled to SOC pool, the reduce of fungal MRC by chronic P addition was detrimental to SOC accumulation and stability in tropical forests.
Grants:	Agencia Estatal de Investigación PID2019-110521GB-I00 Agencia Estatal de Investigación PID2020-115770RB-I00 Agencia Estatal de Investigación TED2021-132627B-I00 Agència de Gestió d'Ajuts Universitaris i de Recerca 2021/SGR-1333
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
Subject:	Nutrient addition ; Soil carbon compound ; Plant substrate ; Soil microbial activity ; Tropical forest
Published in:	Science of the total environment, Vol. 947 (October 2024) , art. 174672, ISSN 1879-1026

DOI: 10.1016/j.scitotenv.2024.174672

Available from: 2026-10-31 Postprint

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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
Articles > Published articles