The contribution of wetland plant litter to soil carbon pool: Decomposition rates and priming effects

Ding, Yan; Wang, Dongqi; Zhao, Guizhe; Chen, Shu; Sun, Taihu; Sun, Hechen; Wu, Chen; Li, Yizhe; Yu, Zhongjie; Li, Yu; Chen, Zhenlou

doi:10.1016/j.envres.2023.115575

Cited by 14 publications

(7 citation statements)

References 62 publications

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“…This is related to the root water uptake pattern of deep‐rooted plants, which tend to absorb deep soil moisture and then save it in the shallow layers where the root distribution is relatively concentrated to satisfy the plant's water demand (Chen et al, 2023; Yang et al, 2022). Previous studies have shown that plant root systems contribute significantly to SOC stabilization (Ding et al, 2023; Panchal et al, 2022). It is noteworthy that when considered in stratification, SOC and RDWD did not show correlation at depths of 100–200, 200–300, and 300–400 cm, suggesting that the soil moisture deficit at this depth may have altered the contribution of the root system to the accumulation of SOC in this layer (Ding et al, 2023).…”

Section: Discussionmentioning

confidence: 99%

“…Previous studies have shown that plant root systems contribute significantly to SOC stabilization (Ding et al, 2023; Panchal et al, 2022). It is noteworthy that when considered in stratification, SOC and RDWD did not show correlation at depths of 100–200, 200–300, and 300–400 cm, suggesting that the soil moisture deficit at this depth may have altered the contribution of the root system to the accumulation of SOC in this layer (Ding et al, 2023). Considering the complex relationship between deep roots and SMC and SOC, how SMC and SOC respond to deep root inputs is a focus for future research.…”

Section: Discussionmentioning

confidence: 99%

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Identify a sustainable afforestation pattern for soil carbon sequestration: Considering both soil water‐carbon conversion efficiency and their coupling relationship on the Loess Plateau

Nan,

He,

et al. 2024

Land Degrad Dev

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Afforestation is considered to be an important means to improve the ecological environment and mitigate climate change. However, inappropriate vegetation restoration can result in severe soil desiccation and ecosystem degradation in water‐limited regions. Here, we evaluated the effects of six different afforestation patterns on soil moisture content, soil organic carbon (SOC) sequestration, and especially the conversion efficiency of the two on the Loess Plateau, taking abandoned land (Al) as a control sample, and attempting to recognize a suitable afforestation pattern based on these parameters. The six afforestation patterns considered were two single‐species shrub plantations (Caragana korshinskii, Ck and Hippophae rhamnoides, Hr), two single‐species tree plantations (Robinia pseudoacacia, Rp and Platycladus orientalis, Po), and two mixed‐species plantations (Rp, Po, Pinus tabuliformis, Pt, and Ulmus pumila, Up mixed plantations (MP); Po and Pt with terracing [MP + T]). We found that mixed‐species plantations (MP + T and MP) have less soil moisture depletion than single‐species plantations, Ck had the highest SOC sequestration but also had a significant deep soil moisture deficit. MP + T had less deep soil moisture deficit but also had lower SOC sequestration than MP. MP show a better comprehensive effect when considering both soil organic carbon sequestration and soil water‐carbon conversion efficiency. Therefore, multispecies MP represent a potentially valuable approach to sustainable afforestation patterns for soil carbon sequestration on the Loess Plateau. This afforestation pattern has the potential to be applied in other similar semi‐arid and semihumid regions. Our results provide insight into vegetation restoration in areas with degraded land. In future afforestation activities, planners must alleviate regional water pressure, increase soil carbon sequestration by increasing species richness, and select the best combination of species to optimize the stability and sustainability of the plantation ecosystem.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Identify a sustainable afforestation pattern for soil carbon sequestration: Considering both soil water‐carbon conversion efficiency and their coupling relationship on the Loess Plateau

Nan,

He,

et al. 2024

Land Degrad Dev

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“…From a chemical perspective, in the degradation process of plant litter, first, visible plant tissues are decomposed into soluble and insoluble macromolecules. An increasing number of studies [5,43,44] have demonstrated that plant litter initially releases a large amount of unstable C, which promotes the accumulation of soil organic carbon and accelerates the mineralization of native soil organic carbon faster. Next, glycolysis occurs to integrate soluble low molecular organic acids, and the final step is condensation to stabilize H 2 S or decomposition to produce CO 2 [42].…”

Section: Decomposition Of Traditional Litter In Wetlands 231 the Deco...mentioning

confidence: 99%

“…Litter decomposition is an essential component of sediment organic matter in wetlands. Some researchers observed that the contribution of mutualistic rice grass litter decomposition to sediment organic matter during decomposition could reach 37-100%, and mangroves could reach 6.36-36.88% [97]; Yan et al [5] investigated the effect of leaf and stem litter inputs on SOC dynamics under 13C isotope-based techniques and showed that the contribution of leaf and stem litter carbon inputs to total soil organic carbon was increased by 37.6% and 15.5%, respectively. Wetland litter decomposition and sedimentassociated β-glucosidase are essential drivers of sediment surface formation, respectively (Figure 2).…”

Section: Impacts Of Wetland Sediment Propertiesmentioning

confidence: 99%

“…Wetland ecosystems bridge the terrestrial and aquatic ecosystems and play an essential role in global climate change. Their carbon cycle is a crucial part of the global carbon balance, and litter decomposition is the primary source of wetland carbon [4][5][6]. Plant decomposition has physical, chemical, and biological effects and is an important process that regulates the nutrient content and net productivity of ecosystems [7].…”

Section: Introductionmentioning

confidence: 99%

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Research Progress on the Decomposition Process of Plant Litter in Wetlands: A Review

Zhou,

Dong,

Tang

et al. 2023

Water

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Wetland is a transitional area where terrestrial ecosystems and aquatic ecosystems interact and influence each other, and it is an important ecosystem on the Earth’s surface. Due to the special characteristics of wetland ecology, the decomposition of wetland plant litter is slightly different from litter in forests, grasslands, and meadows and other traditional areas. The role of litter mineralization in the wetland ecological C cycle and the functional role of plant litter have been neglected. This study analyzes the decomposition mechanism and decomposition model of wetland litter material and focuses on the effects of the decomposition process of wetland litter material on the structure of the soil fauna community, decomposition of soil organic matter, sediment properties, and the dynamic changes in the C cycle of the biological system by combining domestic and international studies from recent years. Finally, we propose that the direction of future research on wetland litter decomposition should be to reveal the mechanism of wetland biodiversity and ecology, as well as the ecological correlation between aboveground and belowground biodiversity, with a view to providing a decision-making basis for wetland phytoremediation and wetland wastewater treatment.

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The roles of seagrass litter decomposition in determining blue carbon sink capacity

Suonan,

Kim,

Yue

et al. 2024

Limnology & Oceanography

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Seagrass litter is a crucial autochthonous source of sediment organic carbon (Corg) that contributes to Corg storage in coastal ecosystems. However, our understanding of seagrass litter decomposition effects on sediment Corg sequestration and the factors influencing the capacity for autochthonous carbon sequestration remains limited. We investigated Zostera marina litter decomposition dynamics in eelgrass meadows along the Korean coast by monitoring changes in the remaining litter mass and autochthonous Corg during the decomposition process. We used a double‐component exponential decay models to characterize the decomposition dynamics and estimate the autochthonous Corg remaining. We also identified potential factors affecting litter decay and Corg accumulation in sediments by examining site‐specific physicochemical properties. Our findings revealed that double‐component models effectively characterized litter decomposition dynamics and indicated greater preservation of litter‐derived slowly degrading Corg in sediments. The reduced decomposition of litter materials owing to low oxygen availability in the muddy sediments led to greater retention of litter mass and litter‐derived Corg in sediments. The anoxic conditions of below‐ground litterbags, compared with above‐ground litterbags, could be alleviated by the oxygen transport through fresh Z. marina roots, thereby potentially stimulating the microbial decomposition of Z. marina below‐ground litter materials at these sites. Our findings highlight the importance of understanding litter decomposition dynamics to accurately assess the carbon sink capacity of seagrass meadows, and demonstrate that physicochemical properties can influence seagrass litter decomposition.

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The contribution of wetland plant litter to soil carbon pool: Decomposition rates and priming effects

Cited by 14 publications

References 62 publications

Identify a sustainable afforestation pattern for soil carbon sequestration: Considering both soil water‐carbon conversion efficiency and their coupling relationship on the Loess Plateau

Identify a sustainable afforestation pattern for soil carbon sequestration: Considering both soil water‐carbon conversion efficiency and their coupling relationship on the Loess Plateau

Research Progress on the Decomposition Process of Plant Litter in Wetlands: A Review

The roles of seagrass litter decomposition in determining blue carbon sink capacity

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