Search Results (106)

The utilisation potential of Brachypterum microphyllum, a fast-growing species introduced into plantation trials in Malaysia, remains relatively underexplored. Samples in this study were obtained from a Forest Research Institute Malaysia (FRIM) plantation trial in Selandar, Melaka, established using wild seedlings collected from Kampung Ulu Groh, Perak, where the species has been traditionally used by the Semai Orang Asli community. The plantation trial was initiated to assess its cultivation potential and to support sustainable raw material supply, thereby reducing reliance on natural forest resources. To date, research has mainly focused on the medicinal properties of the bark, while the wood characteristics and utilisation potential remain less studied. This study investigated the anatomical, chemical, physical, and mechanical properties of seven-year-old plantation-grown B. microphyllum. Microscopic analysis revealed diffuse-porous wood with very large solitary vessels, aliform to confluent parenchyma, medium-sized rays, and non-septate fibres. The absence of tyloses and silica may indicate favourable treatability and machinability, although this requires further confirmation through processing studies. Chemical analysis showed high holocellulose content (79.5%–81.9%), α-cellulose (~44%), moderate lignin content (22.6%–23.9%), and low extractives (0.9%–2.1%), indicating a high carbohydrate composition. Preliminary phytochemical screening identified flavonoids, tannins/polyphenols, and triterpenes/steroids, which may be relevant to further investigation of its reported traditional uses. The wood density ranged from 441.4 to 606.8 kg/m³ (mean: 524.1 kg/m³), classifying it as light to moderately heavy timber. Shrinkage values at 15% moisture content were 2.2% (tangential), 1.3% (radial), and 0.6% (longitudinal), with a T/R ratio of 1.6, indicating moderate dimensional stability. Mechanical properties were comparable to or higher than values reported for several plantation-grown species in the literature. Overall, the findings indicate that seven-year-old B. microphyllum has potential as a fast-growing plantation timber species with favourable physical and mechanical properties. Full article

The coordinated enhancement of wood production and carbon sequestration in plantations is increasingly important for sustainable forest management and climate-change mitigation. However, quantitative evidence on how forest management can jointly improve these two functions remains limited. Based on 847 Pinus massoniana plantation plots (yielding 1184 consecutive-period observations) from China’s 7th–9th National Forest Inventories (covering 2004–2018), we quantified the degree of coordination between wood productivity and tree-layer carbon sequestration rate. Linear mixed-effects models, the piecewise structural equation model, and XGBoost-SHAP analyses were subsequently applied to identify the major drivers and threshold ranges of key stand factors. The results showed that mean carbon sequestration rate and wood productivity were 1.16 Mg/ha/yr and 4.17 m³/ha/yr, respectively. Among the examined management categories, plots with standing-volume harvest intensity < 0.15 (i.e., removing less than 15% of stand volume) showed the highest tree-layer carbon sequestration rate and wood productivity. Overall, wood productivity and tree-layer carbon sequestration rate showed broadly consistent responses across the examined management conditions, suggesting a generally high degree of coordination between the two functions. Stand structural attributes were the primary determinants of the degree of coordination, whereas management factors tended to strengthen this coordination both directly and indirectly through modifications of stand structure. Within the sampled range, a higher degree of coordination was associated with stand DBH values of 7.5–10.6 cm, stand density below 1071 trees/ha, stand age exceeding 29 years, and standing-volume harvest intensity approaching 0.12. These findings provide a quantitative basis for balancing timber production and tree-layer carbon sequestration, and offer practical implications for adaptive management of subtropical plantations under climate-mitigation and timber-supply objectives. Full article

The construction sector contributes substantially to global greenhouse gas emissions, making material substitutions a key strategy for advancing sustainability transitions. Mass timber has emerged as a low-carbon alternative to mineral-based construction materials, offering biogenic carbon storage and compatibility with prefabricated and industrialized building systems. This study aims to systematically synthesize the economic, cost, and market evidence on mass timber construction by reviewing 143 peer-reviewed publications, with the objective of clarifying what is empirically known and where uncertainties remain. The reviewed literature reveals three core findings. First, economic outcomes are mixed: while several studies report regional value creation, supply-chain upgrading, and alignment with circular-economy principles, others highlight persistent constraints such as limited manufacturing capacity and uneven policy support. Second, construction cost findings vary substantially, ranging from cost parity or modest savings relative to conventional systems to premiums of approximately 10–15%, shaped by regional pricing, labor availability, transportation distance, regulatory conditions, and supply-chain maturity. Third, market-oriented studies consistently identify slow diffusion, limited practitioner experience, and risk-averse investment environments as key barriers to adoption. Overall, the review shows that economic performance is not yet consistently established and underscores the need for more standardized, context-sensitive, and methodologically consistent evaluation frameworks to support informed decision-making and the sustainable scaling of mass timber construction. Full article

This study examines the global wood products market to propose an eco-label for the Chilean sector with an international orientation. A national prior certification framework and governance structure were established, aligned with international regulations to ensure compliance with target market standards. By doing so, the initiative aims to expedite the entry of Chilean products into foreign markets while incentivizing the supply and demand for sustainable goods locally. Through a historical review of eco-labels and an assessment of environmental declarations in the timber industry, this research identified critical regulations and designed a comprehensive management model. The findings reveal that existing certifications predominantly focus on indoor air quality (IAQ), specifically regarding volatile organic compound (VOC) and formaldehyde (HCHO) emissions in wood products for the construction sector (CLT, GLULAM, panels, etc.) using fossil-based adhesives. This study concluded that governance should be spearheaded by the Chilean Environment Ministry in collaboration with a specialized technical committee. Consequently, as a result, a hybrid (quantitative and qualitative) eco-label is proposed to communicate emissions limit compliance, enabling Chilean firms to report it emissions, prior to initiating formal international certification processes. Full article

Non-timber forest products (NTFPs) constitute an important component of forest-based production systems and biomass supply chains in Türkiye. Despite their growing economic and ecological significance, the long-term structural dynamics of NTFP production remain insufficiently understood. This study examines temporal and structural changes in NTFP production in Türkiye during the period 1988–2024 using official production statistics and production support data. The analysis applies a quantitative framework that combines linear trend analysis, Shannon diversity and Herfindahl–Hirschman concentration indices, volatility measures based on the coefficient of variation, and regression models to evaluate production trends, structural transformations, stabilization patterns, and the effectiveness of production support mechanisms. The findings reveal a non-linear and multi-phase development pattern characterized by diversification and production growth after 2000, followed by increasing concentration and greater production volatility after 2018. Although total production volume increased substantially, portfolio diversity declined over time, and dependence on a limited number of high-volume products intensified, indicating growing structural vulnerability within the system. In addition, production support mechanisms showed a weak and heterogeneous relationship with production outcomes. A limited contextual comparison with Lithuania’s multifunctional NTFP system is also included to position the findings within a broader European context. Overall, the results suggest that increasing production alone is insufficient to ensure long-term system stability. Instead, diversification-oriented and risk-sensitive resource management strategies that account for production risks, regional disparities, and product heterogeneity are essential for developing sustainable and resilient NTFP production systems. Full article

Rapid population growth is increasing housing demand and accelerating the expansion of the built environment in Egypt. However, practical and sustainable residential building decarbonization remains constrained by limited supplies of supplementary cementitious materials, limited structural timber resources, code restrictions on cement reduction, and cost sensitivity. This study evaluates two Egyptian multi-unit residential case studies—one affordable housing project and one middle-class housing project—to assess whether wall-system substitution can reduce both embodied and operational carbon under local material, code, and cost constraints. An integrated BIM-based digital twin workflow was used to link quantity takeoff, finite-element structural assessment, and whole-building energy simulation. An architectural BIM model was used for material quantification, wall-system definition, and energy-model inputs. A structural model was used to assess the effects of reducing wall density on reinforcement and concrete demand under gravity and seismic load combinations. Operational performance was assessed through cooling-focused energy simulations under hot-arid climatic conditions representative of Egypt’s new desert cities. Alternative wall systems were then evaluated through scenario- based material substitution and revised structural and energy assessments. The results show that reinforcement, concrete, and wall- core materials account for about 80% of total embodied carbon, while cooling accounts for about 72% of operational emissions. Non-structural cement uses, mainly mortars and finishes, account for 36% of total cement demand, ranging from 161 to 229 tons per building across the two case studies. Replacing conventional partition walls with lightweight, energy-efficient alternatives reduced embodied carbon by up to 35.2%, operational carbon by about 15.7% to 16.5%, and total life-cycle carbon by about 17.4% to 17.5% over a 60- year service life. The average savings per building corresponded to avoiding about 30 tons of steel, 165 m³ of ready-mix concrete, and 191 m³ of mortar, with net cost savings of about 3.15 million EGP per building. These results identify a practical pathway toward more sustainable, lower-carbon Egyptian residential buildings without increasing project cost. Full article

The urban trade in non-timber forest products (NTFPs) plays a key role in sustaining livelihoods in the Global South, while also suggesting potential pressure on resource supply systems. This study provides an integrated analysis of NTFP diversity, market structure, economic importance, and perceived drivers of resource decline in Kolwezi, a rapidly expanding mining city where such dynamics remain poorly documented. Data were collected through surveys conducted with 35 sellers across two major urban markets and 384 consumers from different neighbourhoods and analysed using descriptive and inferential statistics to examine patterns, associations, and socio-demographic influences. A total of 65 NTFP species were recorded, including 49 plant, 14 animal, and 2 fungal species, reflecting strong dependence on Miombo ecosystems. Medicinal (59.3%) and food uses dominate, with multifunctional species such as Bobgunnia madagascariensis (Desv.) J.H.Kirkbr. & Wiersama, Canarium schweinfurthii Engl., Terminalia mollis M.A.Lawson, Gardenia ternifolia subsp. jovis-tonantis (Welw.) Verdc., and Albizia antunesiana Harms, playing a central role in both household use and market supply. The trade is largely female-dominated (79.1%) and constitutes a major component of the informal urban economy, with monthly incomes ranging from USD 9 to 429.3, primarily driven by sales volume rather than unit price. However, the sector is constrained by structural and logistical limitations, including remoteness of supply areas, seasonality, and limited value addition. The perceived declining availability of high-use-value species, attributed by respondents to deforestation, mining expansion, and overexploitation, highlights perceived sustainability concerns. These pressures are perceived differently across socio-demographic groups, indicating heterogeneous understandings of environmental change. Overall, the results indicate a perceived mismatch between rising urban demand and declining resource availability, which may reflect an emerging socio-ecological imbalance between urban demand and perceived resource availability. Addressing these challenges requires integrated strategies that combine the domestication of priority species, the development of processing chains, improved infrastructure, and strengthened governance mechanisms. Such approaches are essential to reconcile livelihood support with the sustainable management of NTFPs in rapidly transforming urban landscapes. Full article

Breaking through the constraints of traditional agricultural resources and expanding food supply channels have become essential for safeguarding food security. The non-timber forest-based economy (NTFE), which integrates multiple understory production activities including planting, breeding, and foraging, expands the variety of food sources and provides a new pathway for enhancing regional diversified food supply capacity (DFSC). Based on this perspective, this study constructs evaluation indicator systems for both DFSC and NTFE development. The entropy-weighted TOPSIS method is employed to measure the levels of DFSC and NTFE development across 31 Chinese provinces from 2011 to 2022. A two-way fixed effects model and a spatial Durbin model are applied to empirically investigate the mechanisms through which the NTFE enhances DFSC. The results show the following: (1) Between 2011 and 2022, both the DFSC and the level of NTFE development in China exhibited a sustained upward trend. Specifically, the level of NTFE development grew rapidly before 2019, with a slowdown in growth in the later years, while DFSC maintained a steady increase throughout the study period. (2) NTFE development significantly promotes DFSC. (3) The NTFE enhances DFSC by facilitating the upgrading of the forestry industrial structure and improving forestland productivity. (4) The NTFE generates positive spatial spillover effects on DFSC, and these spillover effects are stronger than direct local effects. Full article

Small and medium enterprises (SMEs) are critical actors in housing supply chains; however, they often struggle to adopt industrialized construction. High variability, limited infrastructure, and skill constraints can reduce repeatability and quality. This study shows that SMEs can start with targeted standardization of prefabricated wood panels. A panel library and coded kits support scalable production, repeatable quality, and a structured workflow for light timber framing. Evidence is provided by a Chilean industrial case study using a time-study campaign. The campaign quantified processing, setup, and internal movement times across a five-station manual layout. Results indicate that a standardized panel set for larger housing typologies stabilizes manual operations. Throughput improves only after key bottlenecks are addressed as staffing increases from 12 to 18 operators, enabling production above 200 homes per year. When two of eight activities are automated at Station 2 using CNC (fixing and cutting), annual capacity can approach 300 homes. Overall, the findings suggest a staged pathway for SMEs: standardize first, add selective automation once constraints are removed, and then integrate internal logistics to sustain the transition from craft-based to industrialized housing production. Full article

Specialized poplar plantations are relevant for wood-based panel production. In recent years, the Italian poplar sector has progressively moved towards more sustainable cultivation systems. Breeding programs developed new clones with fast growth and increased disease resistance. Agroforestry (AF) has emerged as a promising alternative to the conventional plantation (C), and its ecosystem services have been widely documented. This exploratory study compares the main physico-mechanical properties of solid wood from five new poplar clones cultivated in conventional and agroforestry plantation models. The peeling yields and the performances of plywood produced with their veneers are also investigated. Wood was obtained by harvesting seven-year-old trees in two experimental plantations located in the Veneto Region. All the clones were found to have a higher basic density than that of the ‘I-214’, the reference in the sector, and were suitable for veneers production. It was possible to obtain top-quality sheets from trees of both systems, with some differences between clones. However, the overall quality of the veneers depended on the type of clone and on the cultivation system, where conventional plantations provided better results. Higher mechanical performances were found in plywood produced from clones with higher density. The results provide knowledge to optimize agroforestry cultivation of poplar, also as a complementary source of timber supply for the concerned industrial sector. Full article

Plantations of the valuable Chinese timber species, Chamaecyparis hodginsii, established by planting, primarily rely on seed orchards for propagation. Therefore, effective management of the genetic composition of these orchards is essential to ensure a sustainable supply of high-quality seeds. However, the mating system and pollen dispersal mechanisms in its high-generation seed orchards remain unclear, limiting precise genetic management. To address this, we analyzed 30 parental clones and 75 of their open-pollinated progeny from a second-generation seed orchard using 15 polymorphic EST-SSR markers. Compared to reported natural populations of C. hodginsii, both parental and progeny populations maintained high genetic diversity (mean uHe = 0.438 and 0.449, respectively), with a significant excess of heterozygotes (mean Fis = −0.084 and −0.066, respectively). Population genetic structure analysis indicated weak genetic differentiation among the parental genetic groups (mean Fst = 0.012), which was further reduced in the progeny population (mean Fst = 0.003) due to open pollination, reflecting a trend toward genetic homogenization. The mating system was characterized exclusively by outcrossing (tm = 1.000). However, paternity analysis revealed highly skewed paternal contributions, a low effective number of pollen donors (Nep = 8.13), and contributions of S5, S11, and S17 as dominant pollen parents, with 17.33% external pollen flow. These findings elucidate the mechanisms underlying sustained genetic diversity despite unequal paternal contributions and provide a theoretical basis for optimizing parental configuration and pollen management. Full article

Improving alignment between timber sawmilling and prefabrication, defined as the coordination of information, materials, and decision-making across the supply chain, is critical for sustainable construction. This study examined integration through semi-structured interviews with 15 industry practitioners. Using framework analysis supported by NVivo, eight interlinked themes were identified: supply chain fragmentation and market cycles; data-driven forecasting; inventory and moisture management; digital integration; smart planning and production; quality assurance and workforce capability; circular economy and residue utilisation; and systemic enablers and constraints. The findings show that technical capabilities such as optimisation, grading, and QR-based traceability are often undermined by organisational and policy barriers, including distributor-mediated purchasing, limited interoperability, outdated standards, and uneven skills pathways. Integration was considered more feasible for mass timber prefabrication, where batch planning, tighter quality assurance, and vertical integration align with mill operations, compared with frame-and-truss networks that rely on just-in-time project workflows. The study provides empirical evidence of practitioner perspectives and identifies priorities for action that translate into sustainability gains through improved material efficiency, waste reduction, higher-value residue pathways, and supportive policy settings. Full article

Ecosystems provide essential services to local communities, which in turn offer incentives for the preservation of natural resources, as these resources are crucial to the sustainability and evolution of human societies. So, this study examined the demand for ecosystem services among communities surrounding the Luki Biosphere Reserve in the Democratic Republic of Congo. Data were collected through semi-structured interviews with 361 randomly selected individuals and focus group discussions in 18 villages, complemented by field observations on local resource use (agriculture, charcoal production, wood harvesting, and tree felling). The services provided by the reserve were identified according to citation frequency, perceived usefulness, and level of agreement among respondents. Results indicate that agricultural products (28.5%), charcoal (19.1%), non-timber forest products (17.5%), and firewood (10%) are the most requested. The Chi-square test showed significant associations between dependence on ecosystem services and socio-economic variables such as gender (p = 0.014 < 0.05), education level (p = 0.033 < 0.05), and annual income (p = 0.000 < 0.05), while age was not significant (p = 0.504 > 0.05). Poverty and rapid demographic growth were identified as key drivers of demand and factors contributing to growing pressure on natural resources. The study emphasizes feedback loops between changes in ecosystem service supply and community responses, as well as trade-offs between services and actors. It recommends integrating ecosystem values into agricultural and forestry policies, while raising awareness and educating local communities to promote sustainable resource management. Full article

Blue carbon ecosystems, particularly mangroves, seagrasses, and salt marshes, play a crucial role in climate regulation by capturing and storing huge stocks of carbon. Together with supporting fisheries production, protecting shorelines from erosion, and supplying timber and non-timber products to communities, blue carbon ecosystems offer investment opportunities through carbon markets, thus supporting climate change mitigation and sustainable livelihoods. The current study assessed above- and below-ground biomass, sediment carbon, and the capacity of the blue carbon ecosystems in Kwale and Lamu Counties, Kenya, to capture and store carbon. This was followed by mapping of hotspot areas of degradation and the identification of investment opportunities in blue carbon credits. Carbon densities in mangroves were estimated at 560.23 Mg C ha⁻¹ in Lamu and 526.34 Mg C ha⁻¹ in Kwale, with sediments accounting for more than 70% of the stored carbon. In seagrass ecosystems, carbon densities measured 171.65 Mg C ha⁻¹ in Lamu and 220.29 Mg C ha⁻¹ in Kwale, values that surpass the national average but are consistent with global figures. Mangrove cover is declining at 0.49% yr⁻¹ in Kwale and 0.16% yr⁻¹ in Lamu, while seagrass losses in Lamu are 0.67% yr⁻¹, with a 0.34% yr⁻¹ increase in Kwale. Under a business-as-usual scenario, mangrove loss over 30 years will result in emissions of 4.43 million tCO₂e in Kwale and 18.96 million tCO₂e in Lamu. Effective interventions could enhance carbon sequestration from 0.12 to 3.86 million tCO₂e in Kwale and 0.62 to 19.52 million tCO₂e in Lamu. At the same period, seagrass losses in Lamu would emit 5.21 million tCO₂e. With a conservative carbon price of 20 USD per tCO₂e, projected annual revenues from mangrove carbon credits amount to USD 3.59 million in both Lamu and Kwale, and USD 216,040 for seagrass carbon credits in Lamu. These findings highlight the substantial climate and financial benefits of investing in the restoration and protection of the two ecosystems. Full article

The forest bioeconomy is an emerging global sector that uses forest material to make value-added bioproducts that range from pharmaceuticals to biofuels. Notwithstanding their capacity to advance various United Nations Sustainable Development Goals, forest bioproducts face considerable sustainability challenges in global supply chains associated with harvesting, processing, and transportation. Using a systematic literature review focused on challenges and solutions to sustainability in forest bioeconomy supply chains, we analyze 81 peer-reviewed studies to identify the primary sustainability challenges and their attendant solutions. We find that economic barriers to scaling the forest bioeconomy are the most commonly studied challenge, while social and environmental challenges are often marginalized. Increasing stakeholder engagement is the most commonly mentioned solution, but the limitations of stakeholder engagement are largely absent from scholarly discourse. Lastly, we identify significant gaps in the literature related to coverage of non-European countries and analysis of key sectors like mass timber construction. The results gesture to the need for more research on under-represented regions and sectors, greater attention to social and environmental supply chain challenges, and deeper engagement with adjacent literatures on the intersection of public policy with sustainable supply chain governance. Full article