Aboveground carbon sequestration of Cunninghamia lanceolata forests: Magnitude and drivers

Forest Ecosystems, Год журнала: 2024, Номер 11, С. 100165 - 100165

Опубликована: Янв. 1, 2024

Understanding the spatial variation, temporal changes, and their underlying driving forces of carbon sequestration in various forests is great importance for understanding cycle management options. How density Cunninghamia lanceolata forests, extensively cultivated timber production subtropical China, vary with biodiversity, forest structure, environment, cultural factors remain poorly explored, presenting a critical knowledge gap realizing supply potential through management.Based on large-scale database 449 permanent inventory plots, we quantified spatial-temporal heterogeneity aboveground densities accumulation rates lanceolate Hunan Province, attributed contributions stand environmental, to using quantile age-sequence analysis, partial least squares path modeling (PLS-PM), hot-spot analysis. The results showed low values average, comparison other same climate zone (i.e., subtropics), pronounced variability. Specifically, regression analysis along an age sequence large differences among underperformed outperformed (0.50 1.80 Mg·ha−1·yr−1). PLS-PM demonstrated that maximum DBH were main crucial drivers from young mature forests. Furthermore, species diversity geo-topographic significant causing discrepancy change between low- high-carbon-bearing Hotspot revealed culture attributes shaping geospatial patterns sequestration. Our work highlighted retaining large-sized trees increasing shade-tolerant tree important enhance C.

Язык: Английский

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Recent advances and challenges in monitoring and modeling of disturbances in tropical moist forests

Frontiers in Remote Sensing, Год журнала: 2024, Номер 5

Опубликована: Март 14, 2024

Tropical moist forests have been severely affected by natural and anthropogenic disturbances, leading to substantial changes in global carbon cycle climate. These effects received great attention scientific research debates. Here we review recent progress on drivers ecological impacts of tropical forest their monitoring modeling methods. Disturbances are primarily driven clearcutting, selective logging, fire, extreme drought, edge effects. Compound disturbances such as fire aggravate degradation the forests. Drought can result terrestrial loss via physiological impacts. lead direct loss, biophysical warming microclimate change. Remote sensing observations promising for revealing mechanisms, which will be useful implementing disturbance processes dynamic vegetation models. Yet, constrained spatiotemporal coverages resolutions limit application these data process-based It is also challenging represent physical derived from fine-resolution remote coarse-resolution We highlight need continuously integrate new datasets advance understanding patterns Interactions climate change activities should considered assessing feedbacks disturbances.

Язык: Английский

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Deep soil carbon loss offsets rapid aboveground carbon accumulation after reforestation

Forest Ecology and Management, Год журнала: 2023, Номер 548, С. 121403 - 121403

Опубликована: Сен. 12, 2023

Язык: Английский

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Tree size diversity is the major driver of aboveground carbon storage in dryland agroforestry parklands

Scientific Reports, Год журнала: 2023, Номер 13(1)

Опубликована: Дек. 14, 2023

Abstract Despite the importance of agroforestry parkland systems for ecosystem and livelihood benefits, evidence on determinants carbon storage in parklands remains scarce. Here, we assessed direct indirect influence human management (selective harvesting trees), abiotic factors (climate, topography, soil) multiple attributes species diversity (taxonomic, functional, structural) aboveground (AGC) stocks 51 drylands Benin. We used linear mixed-effects regressions structural equation modeling to test relative effects these predictors AGC stocks. found that (tree size diversity, H DBH ) had strongest (effect β = 0.59, R 2 54%) relationship with stocks, followed by community-weighted mean maximum height (CWM MAXH ). Taxonomic no significant but influenced latter indirectly through its negative effect CWM , reflecting impact selection farmers. Elevation soil total organic content positively both directly via . No association was between tree factor. Our results suggest mass ratio, niche complementarity environmental favorability as underlying mechanisms parklands. findings also highlight potential role human-driven filtering local pool regulating biodiversity conclude promotion is dependent protecting regeneration addition enhancing managing tall-stature trees.

Язык: Английский

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Effect of Prescribed Burning on Tree Diversity, Biomass Stocks and Soil Organic Carbon Storage in Tropical Highland Forests

Forests, Год журнала: 2022, Номер 13(12), С. 2164 - 2164

Опубликована: Дек. 16, 2022

Fire has been an integral part of ecosystem functioning in many biomes for a long time, but the increased intensity and frequency wildfires often affect plant diversity carbon storage. Prescribed burning is one alternatives to forest fuel management where fire controlled carried out under determined set weather conditions objectives. The effect prescribed on (C) storage not studied widely. objective this study was evaluate indices, biomass stocks, soil C tropical highland forests Southern Mexico. We assessed stocks at 21 sampling sites: seven with burning, non-burning, wildfires. calculated tree biodiversity stand structural properties, species composition among treatments. quantified vegetation by using allometric equation litter direct sampling. analyzed 252 samples organic content other properties. results showed that index higher sites (Shannon index, H = 1.26) non-burning (H 1.14) than wildfire 0.36). There greater similarity between compared sites. positive (183.9 Mg ha−1) when (144.3 ha−1), difference statistically significant (p > 0.05) stocks. conserved as well opposite what we found

Язык: Английский

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Trees diversity explains variations in biodiversity-ecosystem function relationships across environmental gradients and conservation status in riparian corridors

Frontiers in Forests and Global Change, Год журнала: 2024, Номер 7

Опубликована: Март 26, 2024

Riparian ecosystems are recognized as large reservoirs of biodiversity providing important ecosystem services. However, the relationship between tree species diversity and functions underlying ecological mechanisms have less been studied in riparian corridors. This study assessed effect (taxonomic, functional, phylogenetic) on (habitat quality–HbQ aboveground carbon–AGC) across environmental gradients (distances to stream bed) conservation status. Data were collected from 96 inventory plots installed a 1 km buffer zone either side permanent streams Upper Ouémé watershed northern Benin. We employed linear mixed effects models structural equation modeling analyze data. found that (HbQ, AGC) attributes including richness (SR), Faith’s phylogenetic index (PD) community-weighted mean maximum height (CWM Hmax ) significantly lower away streambed than nearby. The correlation SR was significant positive within distance gradient also CWM best predictor both functions, PD mediated AGC HbQ areas close unprotected areas, respectively. Our reveals influence human activities functioning relationships corridors provides new insights into importance tall stature trees with distant lineages for these ecosystems. Based variables measured tested this study, we argue corridor management policies should consider plant traits phylogeny promote wider buffers co-benefits climate change mitigation.

Язык: Английский

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Carbon estimates in a neglected non-forest ecosystem: Aboveground biomass in a tropical cloud savanna in Southeastern Brazil

Deleted Journal, Год журнала: 2024, Номер unknown

Опубликована: Июнь 1, 2024

Plant communities store carbon in their biomass, contributing to the reduction of greenhouse gases atmosphere. Many studies about aboveground biomass (AGB) have been conducted Brazilian Atlantic Forest, but non-forest ecosystems (NFE) remain neglected. This is case cloud savannas that occur at high altitudes (>800 m) Mantiqueira Mountain Range, Southeastern Brazil. To evaluate wood structure and live AGB variation this phytophysiognomy, we carried out an inventory woody dead stems 1-ha permanent sample Ibitipoca State Park (Minas Gerais, Brazil). We measured (diameter height) identified all woods with DB ≥ 3 cm base level = 0.30 m above soil) a 10 random plots (50 × 20 m). estimate by community based on trunk samples (wood density) global allometric equations. sampled total 1480 woods, which 1055 (71.3%) were living 425 (29.7%) standing woods. The species Eremanthus erythropappus (Asteraceae) was dominant, 56% individuals 73% basal area. estimated for 10.5 ton.ha−1, where 8.8 ton.ha−1 (83.9%) 1.7 (17,1%) values our study lower than those registered surrounding forests other NFEs (savanna) types Brazil, probably related sandy poor soils. best knowledge, first one quantifies savanna Knowledge storage NFE could be used encourage REDD+ CDM projects since it widespread threatened vegetation type over very erodible soils along Mountains Range.

Язык: Английский

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Modelling the Dynamics of Carbon Storages for Pinus densata Using Landsat Images in Shangri-La Considering Topographic Factors

Remote Sensing, Год журнала: 2022, Номер 14(24), С. 6244 - 6244

Опубликована: Дек. 9, 2022

Accurate estimation of forest carbon storage is essential for understanding the dynamics resources and optimizing decisions resource management. In order to explore changes in Pinus densata Shangri-La influence topography on storage, two dynamic models were developed based National Forest Inventory (NFI) Landsat TM/OLI images with a 5-year interval change annual average change. The three modelling methods used partial least squares (PLSR), random (RF) gradient boosting regression tree (GBRT). Various spectral texture features calculated filtered before modelling. terrain niche index (TNI), which able reflect combined effect elevation slope, was added model, optimal model selected estimate topographic conditions areas analyzed. results showed that: (1) data performs better than data, RF has higher accuracy compared PLSR GBRT models. (2) addition TNI improved accuracy, R2 by up 10.48% at most, RMSE reduced 7.32% MAE 8.89% highest after adding TNI, an 0.87, 3.82 t-C·ha−1, 1.78 t-C·ha−1. (3) direct that decreased 1987–1992 1997–2002, increased 1992–1997, 2002–2007, 2007–2012, 2012–2017. (4) trend increasing or decreasing each period not exactly same gradient, according dominant distribution, as lower elevations gentler slopes are favorable accumulation while area more randomly distributed topographically. This study develops considering factors, provides solution accurate regions complex topography.

Язык: Английский

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Fragmentation is the main driver of residual forest aboveground biomass in West African low forest-high deforestation landscapes

Trees Forests and People, Год журнала: 2023, Номер 15, С. 100477 - 100477

Опубликована: Дек. 12, 2023

Tropical forests play a crucial role in climate regulation due to their high carbon sequestration capacity. However, degradation and disturbances these may result significant losses. This study focuses on the impact of various biophysical, anthropogenic, landscape factors aboveground biomass (AGB) heavily disturbed landscapes Côte d'Ivoire (West Africa), typical low-forest high-deforestation country. AGB estimates from National Forest Inventory dataset have been linked five categories variables (Climate, Soil, Topography, Landscape, Human-related) through random forest modeling approach that addressed collinearity among variables, selected key each category, used spatial cross-validation evaluate model performance. The comprehensive model, combining composition, physical soil properties, demonstrated strong performance with an R-squared 0.62. Notably, percentage occupied by within radius 1000m (PLAND1000) had highly AGB, exhibiting notable increase when PLAND1000 exceeded 80% decrease it felt below 25%. Soil both (Bulk Density Coarse Fraction) chemical (soil pH), significantly influenced too. Interestingly, climatic, topographic, other anthropogenic minimal relevance predicting suggesting effects captured integrative variables. In order enhance preservation restoration initiatives face deforestation fragmentation challenges West African region, we recommend (i) evaluating appropriate scale effect (a circle being most this study); (ii) prioritizing or dense landscapes; (iii) integrating composition into management policies.

Язык: Английский

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Functional richness mediates landscape and management effects on tree biomass and soil fertility during secondary forest succession

Ecological Indicators, Год журнала: 2024, Номер 162, С. 112029 - 112029

Опубликована: Апрель 15, 2024

Secondary forests can play a critical role in conserving plant biodiversity and sequestering carbon. However, intensive past management, fragmentation, initial soil fertility hinder forest recovery during secondary succession, especially terms of tree species selection. In turn, selection negatively impact may slow down the succession process, but direct indirect effects between these factors remain unclear. To assess complex interactions among landscape, previous vegetation, 27 varying ages, previously used for eucalyptus plantations, located diverse landscape configurations within Atlantic Forest biome, were examined. Key variables, such as planting frequency, cutting cover patch isolation fragments, functional richness, aboveground biomass (AGB), sum bases, organic matter, phosphorus concentration to construct structural equation model evaluate management on development. Cutting frequency had negative effect richness. Additionally, strong positive diversity bases was found. Thus, (a proxy fertility), mediated by These findings underscore significance integrating into restoration strategies preserve ecosystem functioning efficiently recover biodiversity, biomass, forests.

Язык: Английский

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