Quantifying the impact pathways and driving mechanisms of increased forest CS: A comparative study case from typical karst ecologically fragile and non-karst areas

Ecological Engineering, Journal Year: 2025, Volume and Issue: 213, P. 107544 - 107544

Published: Feb. 8, 2025

Language: Английский

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Stand States Drive Disparities in the Carbon Storage Within a Masson Pine Forest Ecosystem

Forests, Journal Year: 2025, Volume and Issue: 16(3), P. 499 - 499

Published: March 12, 2025

Forest ecosystems are important for carbon storage but vary in their ability to do so. Here, we examined the relationship between stand state and ecosystem Pinus massoniana forests, pinpointed key indicators affecting storage, provided a basis management enhance storage. We selected nine representing structure (diameter at breast height (DBH) distribution, tree density), vitality (stand dominance, growth, health), diversity (species composition, species diversity, evenness) evaluate state. Multivariate statistical analyses, specifically Mantel test Canonical Correspondence Analysis (CCA), were employed explore complex relationships states of P. forests found that (1) has strong influence on there is autocorrelation among states; (2) structural attributes have stronger association with than diversity. The primary associated DBH distribution (H), growth (B), density (K), (V), evenness (P); (3) (K) significantly affects vegetation layer, while (H) soil layer. None stand-state indicators, however, major litter Our results indicate can be managed improve forest quality forests.

Language: Английский

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The carbon footprint of mandarin value chains in Nepal

Journal of Cleaner Production, Journal Year: 2025, Volume and Issue: unknown, P. 145346 - 145346

Published: March 1, 2025

Language: Английский

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Modeling carbon transfers in subtropical Chinese fir plantations: The role of stemflow and litter leachate

Journal of Hydrology, Journal Year: 2025, Volume and Issue: unknown, P. 133158 - 133158

Published: March 1, 2025

Language: Английский

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Estimating Spatiotemporal Dynamics of Carbon Storage in Roinia pseudoacacia Plantations in the Caijiachuan Watershed Using Sample Plots and Uncrewed Aerial Vehicle-Borne Laser Scanning Data

Remote Sensing, Journal Year: 2025, Volume and Issue: 17(8), P. 1365 - 1365

Published: April 11, 2025

Forest ecosystems play a pivotal role in the global carbon cycle and climate change mitigation. aboveground biomass (AGB), critical indicator of storage sequestration capacity, has garnered significant attention ecological research. Recently, uncrewed aerial vehicle-borne laser scanning (ULS) technology emerged as promising tool for rapidly acquiring three-dimensional spatial information on AGB vegetation storage. This study evaluates applicability accuracy UAV-LiDAR estimating spatiotemporal dynamics Robinia pseudoacacia (R. pseudoacacia) plantations gully regions Loess Plateau, China. At sample plot scale, optimal parameters individual tree segmentation (ITS) based canopy height model (CHM) were determined, was validated. The results showed root mean square error (RMSE) values 13.17 trees (25.16%) count, 0.40 m (3.57%) average (AH), 320.88 kg (16.94%) AGB. regression model, which links with AH generated estimates that closely matched observed values. watershed ULS data used to estimate R. Caijiachuan watershed. analysis revealed total 68,992 trees, 2890.34 Mg density 62.46 ha−1. Low-density forest areas (<1500 ha−1) dominated landscape, accounting 94.38% 82.62% area, 92.46% Analysis tree-ring variation onset growth decline across different classes aged 0–30 years, higher-density stands exhibiting delayed compared lower-density stands. Compared traditional methods diameter at breast (DBH), assessments demonstrated superior scientific validity. underscores feasibility potential estimation complex terrain, such Plateau. It highlights importance topographic factors enhance accuracy. findings provide valuable support management high-quality development present an efficient approach precise sink accounting.

Language: Английский

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Monitoring Changes in Composition and Diversity of Forest Vegetation Layers after the Cessation of Management for Renaturalization

Forests, Journal Year: 2024, Volume and Issue: 15(6), P. 907 - 907

Published: May 23, 2024

Overstory and understory vegetation play a vital role in forest ecosystem functionality. However, it is necessary to enhance the knowledge of their diversity compositional dynamics following cessation disturbance, which required inform restoration approaches mechanisms for maintaining disturbance cessation. We conducted chronosequence spanning 0–1, 5–6, 11–12, 20–24, 28–34 years since cessation, old-growth forests investigate dynamic changes overstory composition, as well maintenance anthropogenic disturbances subtropical regions Eastern China. The current study results indicated decrease cover periodic fluctuations overstorey efforts. Specifically, shrub layer exhibited highest richness years, while herb showed lowest evenness. Multivariate analysis using multiple-response permutation procedures that species composition interspecific quantity ratio plants at significantly differ from those early closure stage. An indicator revealed more support was given sun-loving after 0–1 enclosure, with shade tolerance low nutrient requirements were supported years. structural equation model show 38.8% impact on evenness related light substrate diversity. ecological time mainly indirectly affects by influencing upper vegetation, availability, heterogeneity. Overall, this can maintain care understorey plant contribute sustainable management forests.

Language: Английский

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Carbon Sequestration in Vulnerable Ecological Regions of China: Limitations and Opportunities

Journal of Cleaner Production, Journal Year: 2024, Volume and Issue: unknown, P. 143702 - 143702

Published: Sept. 1, 2024

Language: Английский

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Research on Carbon Sequestration Capacity of Urban Park Green Space in the Central Urban Area of Beijing and Driving Factors Thereof

Landscape Architecture, Journal Year: 2025, Volume and Issue: 32(1), P. 32 - 40

Published: Jan. 1, 2025

Urban ecosystem services play an irreplaceable role in maintaining life support and environmental dynamic balance. green spaces, as important component of urban ecosystems, are the only element that directly increases carbon sinks indirectly reduces emissions cities. While beautifying environment, they extremely ecological benefits sequestration. Quantifying sequestration capacity spaces is great significance for achieving peaking neutrality goals addressing climate change. Based on Carnegie-Ames-Stanford approach (CASA) model, Landsat 8 TM remote sensing data meteorological from 2014, 2017, 2020 used to estimate net primary productivity (NPP) parks central area Beijing, explore spatial temporal distribution pattern change characteristics Beijing. Pearson correlation analysis study driving relationship between park space, vegetation index, environment landscape pattern. Additionally, biomass allometry equation method measure actual 33 typical plant communities order verify accuracy model estimation. The results show space Beijing increased year by 2014 2020, with a 10.89% increase compared 2014. Varying significantly distribution, mostly distributed Haidian District Chaoyang District. Due regional limitations, core areas such Dongcheng Xicheng relatively small. total 2017 was 5.23×10⁴ tC, 7.09×10⁴ 7.45×10⁴ respectively. Accordingly, annual average per unit 2.46 tC/hm², 3.19 3.29 respectively, showing increasing trend year. 82.15% have improved their capacity. There significant differences "high at edge low center overall". District, Shijingshan higher In were mainly characterized medium high capacity, while shifted large patches playing positively correlated (p&lt;0.01) normalized difference index (NDVI), leaf (LAI), rainfall, negatively (p&lt;0.05) temperature, having little wind speed. patch (PA), largest (LPI), percentage like adjacency (PLADJ), cohesion (COHESION), aggregation (AI), shape (LSI), mean perimeter-area ratio (MPAR), fractal dimension (MPFD). To adopted, measured simulated values compared. Specifically, relative error 5.64%, square less than 0.1, fitting 0.7314. estimated result good, basically meeting requirements. 2020. coverage LAI, better cooling effect. PA, AI, simpler patches, stronger certain extent. This research may provide ideas scientific assessment improvement formulation response measures, lay foundation balance ecosystem. can whole process planning, construction management basis optimization regulation layout space.

Language: Английский

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Fitting Maximum Crown Width Height of Chinese fir through Ensemble Learning Combined with Fine Spatial Competition

Plant Phenomics, Journal Year: 2025, Volume and Issue: unknown, P. 100018 - 100018

Published: Feb. 1, 2025

Language: Английский

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Comparison of Growth Strategies and Biomass Allocation in Chinese Fir Provenances from the Subtropical Region of China

Forests, Journal Year: 2025, Volume and Issue: 16(4), P. 687 - 687

Published: April 16, 2025

This study aims to evaluate the growth characteristics of six Chinese fir (Cunninghamia lanceolata (Lamb.) Hook.) provenances (S1–S6) from different climatic regions in subtropical China order select superior with strong adaptability, fast growth, and reasonable biomass allocation. These results will provide references for genetic improvement resource utilization plantations. A total 385 trees, aged 26 48 years, were selected gene bank Anhui. Wood core sampling was used obtain tree ring width early/latewood data. Growth rate, fast-growth period, allocation each provenance analyzed using methods such as logistic equation, BAI (basal area increment), latewood percentage, estimation. The period starts 2nd 4th year, significant occurring around 14th year stabilizing between 30 50 years. Provenance S2 showed clear advantages rate biomass, while S6 relatively weak. analysis revealed that reached their peak 10 years age, a gradual decline afterward, but maintained higher levels longer period. Root-shoot ratio had most balanced ratio, promoting stable efficient water nutrient absorption, root-shoot indicating limitations. Furthermore, demonstrated continuous increase after excellent potential. provides quantitative adaptability provenances, offering scientific support construction breeding plantations, contributing enhancing productivity ecological plantations sustainable utilization.

Language: Английский

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