Faster accumulation and greater contribution of glomalin to the soil organic carbon pool than amino sugars do under tropical coastal forest restoration
Li, Tengteng (South China Botanical Garden. Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems)
Yuan, Ye (South China Botanical Garden. Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems)
Mou, Zhijian (South China Botanical Garden. Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems)
Li, Yue (South China Botanical Garden. Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems)
Kuang, Luhui (South China Botanical Garden. Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems)
Zhang, Jing (South China Botanical Garden. Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems)
Wu, Wenjia (South China Botanical Garden. Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems)
Wang, Faming (South China Botanical Garden. Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems)
Wang, Jun (South China Botanical Garden. Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems)
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 (South China Botanical Garden. Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems)
Liu, Zhanfeng (South China Botanical Garden. Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems)

Fecha:	2023
Resumen:	Microbial metabolic products play a vital role in maintaining ecosystem multifunctionality, such as soil physical structure and soil organic carbon (SOC) preservation. Afforestation is an effective strategy to restore degraded land. Glomalin-related soil proteins (GRSP) and amino sugars are regarded as stable microbial-derived C, and their distribution within soil aggregates affects soil structure stability and SOC sequestration. However, the information about how afforestation affects the microbial contribution to SOC pools within aggregates is poorly understood. We assessed the accumulation and contribution of GRSP and amino sugars within soil aggregates along a restoration chronosequence (Bare land, Eucalyptus exserta plantation, native species mixed forest, and native forest) in tropical coastal terraces. Amino sugars and GRSP concentrations increased, whereas their contributions to the SOC pool decreased along the restoration chronosequence. Although microaggregates harbored greater microbial abundances, amino sugars and GRSP concentrations were not significantly affected by aggregate sizes. Interestingly, the contributions of amino sugars and GRSP to SOC pools decreased with decreasing aggregate size which might be associated with increased accumulation of plant-derived C. However, the relative change rate of GRSP was consistently greater in all restoration chronosequences than that of amino sugars. The accumulation of GRSP and amino sugars in SOC pools was closely associated with the dynamics of soil fertility and the microbial community. Our findings suggest that GRSP accumulates faster and contributes more to SOC pools during restoration than amino sugars did which was greatly affected by aggregate sizes. Afforestation substantially enhanced soil quality with native forest comprising species sequestering more SOC than the monoculture plantation did. Such information is invaluable for improving our mechanistic understanding of microbial control over SOC preservation during degraded ecosystem restoration. Our findings also show that plantations using arbuscular mycorrhizal plants can be an effective practice to sequester more soil carbon during restoration.
Ayudas:	Agencia Estatal de Investigación PID2019-110521GB-I00 Agencia Estatal de Investigación PID2020-115770RB-I00 Agència de Gestió d'Ajuts Universitaris i de Recerca 2017/SGR-1005
Derechos:	Tots els drets reservats.
Lengua:	Anglès
Documento:	Article ; recerca ; Versió acceptada per publicar
Materia:	Afforestation ; Amino sugars ; Glomalin-related ; Soil protein soil aggregates ; Soil microbial community ; Tropical coastal terrace
Publicado en:	Global change biology, Vol. 29, issue 2 (Jan. 2023) , p. 533-546, ISSN 1365-2486

DOI: 10.1111/gcb.16467

Postprint 32 p, 1.6 MB

El registro aparece en las colecciones:
Documentos de investigación > Documentos de los grupos de investigación de la UAB > Centros y grupos de investigación (producción científica) > Ciencias > CREAF (Centre de Recerca Ecològica i d'Aplicacions Forestals)
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