Divergent accumulation of amino sugars and lignins mediated by soil functional carbon pools under tropical forest conversion
Li, Tengteng (Chinese Academy of Sciences. South China Botanical Garden)
Cheng, Hao (Chinese Academy of Sciences. Research Center for Eco-Environmental Sciences)
Li, Yue (Chinese Academy of Sciences. South China Botanical Garden)
Mou, Zhijian (University of Chinese Academy of Sciences. College of Resources and Environment)
Zhu, Xiaolin Min (Chinese Academy of Sciences. South China Botanical Garden)
Wu, Wenjia (Chinese Academy of Sciences. South China Botanical Garden)
Zhang, Jing (Chinese Academy of Sciences. South China Botanical Garden)
Kuang, Luhui (Chinese Academy of Sciences. South China Botanical Garden)
Wang, Jun (Chinese Academy of Sciences. South China Botanical Garden)
Hui, Dafeng (Tennessee State University. Department of Biological Sciences)
Lambers, Hans (University of Western Australia. School of Biological Sciences)
Sardans i Galobart, Jordi (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Peñuelas, Josep (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Ren, Hai (Chinese Academy of Sciences. South China Botanical Garden)
Mohti, Azian Binti (Forest Research Institute Malaysia)
Liang, Naishen (National Institute for Environmental Studies (Tsukuba))
Liu, Zhanfeng (Chinese Academy of Sciences. South China Botanical Garden)

Date:	2023
Abstract:	Tropical primary forests are being destroyed at an alarming rate and converted for other land uses which is expected to greatly influence soil carbon (C) cycling. However, our understanding of how tropical forest conversions affect the accumulation of compounds in soil functional C pools remains unclear. Here, we collected soils from primary forests (PF), secondary forests (SF), oil-palm (OP), and rubber plantations (RP), and assessed the accumulation of plant- and microbial-derived compounds within soil organic carbon (SOC), particulate (POC) and mineral-associated (MAOC) organic C. PF conversion to RP greatly decreased SOC, POC, and MAOC concentrations, whereas conversion to SF increased POC concentrations and decreased MAOC concentrations, and conversion to OP only increased POC concentrations. PF conversion to RP decreased lignin concentrations and increased amino sugar concentrations in SOC pools which increased the stability of SOC, whereas conversion to SF only increased the lignin concentrations in POC, and conversion to OP just increased lignin concentrations in POC and decreased it in MAOC. We observed divergent dynamics of amino sugars (decrease) and lignin (increase) in SOC with increasing SOC. Only lignin concentrations increased in POC with increasing POC and amino sugars concentrations decreased in MAOC with increasing MAOC. Conversion to RP significantly decreased soil enzyme activities and microbial biomasses. Lignin accumulation was associated with microbial properties, whereas amino sugar accumulation was mainly associated with soil nutrients and stoichiometries. These results suggest that the divergent accumulation of plant- and microbial-derived C in SOC was delivered by the distribution and original composition of functional C pools under forest conversions. Forest conversions changed the formation and stabilization processes of SOC in the long run which was associated with converted plantations and management. The important roles of soil nutrients and stoichiometry also provide a natural-based solution to enhance SOC sequestration via nutrient management in tropical forests.
Grants:	Agencia Estatal de Investigación PID2019-110521GB-I00 Agencia Estatal de Investigación PID2020-115770RB-I Agència de Gestió d'Ajuts Universitaris i de Recerca 2021/SGR-1333
Note:	Altres ajuts: Fundación Ramón Areces project CIVP20A6621.
Rights:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial 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:	Alemany
Document:	Article ; recerca ; Versió acceptada per publicar
Subject:	Amino sugars ; Lignin ; Soil organic carbon ; Particulate organic carbon ; Mineral-associated organic carbon ; Tropical forest conversions
Published in:	Science of the total environment, Vol. 881 (July 2023) , art. 163204, ISSN 1879-1026

DOI: 10.1016/j.scitotenv.2023.163204

Available from: 2025-07-30 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