Sustainable Forest Management Policies Research Articles

Assessment of plant biodiversity in tropical dry forests of Sialkot, Pakistan; insight into environmental, anthropogenic influence and conservation strategies

The tropical dry forests (TDF) have an enormously rich flora and fauna that offer various ecological services to the surrounding human societies. Biodiversity assessment is mandatory for implementing any sustainable forest management policy, which is why it is one of the important criteria and indicators currently used. Threats to TDF biodiversity are the primary challenges arising from environmental concerns caused by anthropogenic activity leading to global warming issues. The study aimed to investigate the vegetation assessment and several environmental and anthropogenic variables influencing forest biodiversity from 5 threatened forest sites of District Sialkot (Ghalotian, Kishan Garh, Daburgi Chanda Singh, Pir Kot, and Ghulab Garh), Pakistan. We collected 170 distinct plant species, including 135 dicots, 27 monocots, seven pteridophytes, and one bryophyte, categorized into 138 genera and 62 families, divided into 114 herbs, 32 trees, and 24 shrubs. The phytosociological analysis described the quantitative characteristics, including % frequency, % density, % cover, and importance Value Index (IVI) of all forest areas. Gulab Garh forest has the richest biodiversity forest area, and herbs are the dominant species that have been documented. Environmental factors such as temperature, precipitation, organic matter, soil pH, Ca+2, Mg+2, Na+, Cl−, and electric conductivity (EC) strongly affect forest vegetation investigated by principal coordinate analysis. Shannon and Simpson’s diversity indexes reveal that all sites contain loamy and sandy soil and display a significant relationship between alpha diversity and richness. Increasing trends in temperature and decreasing trends in rainfall suggested that climate significantly affects the Sialkot region’s plant biodiversity. SWOT analysis highlighted that population growth leads to increasing anthropogenic activities such as constructing housing societies and roads, inadequate farming, and excessive grazing, impacting the forest vegetation and altering TDF ecosystem properties/services and functioning. Our findings reinforce the vegetational assessment and importance of local forest biodiversity and significant environmental drivers that influence the plant species diversity in TDF areas. Future conservation strategies are suggested to reduce unlawful resource consumption, restore plant biodiversity in designated protected areas, and conserve rare species locally.

Patterns of forest community diversity, regeneration potential and carbon storages along an altitudinal gradient in Eastern Himalaya, India

This study showed changing patterns in the plant species composition, diversity, and carbon storage potential of different forests along altitudinal gradients (i.e. 100 – 1900 m) in Eastern Himalayan India. Different tree, shrub and herb species were sampled along the altitudinal gradients ranging from tropical to temperate forests through Nested Plot design. In each forest, vegetation sampling was made by establishing a permanent plot of 250 m × 250 m as per ISRO-GBP/NCP-VCP protocol. Individuals of trees ≥10 cm girth at breast height (GBH), shrubs and herbs were recorded in 4, 8 and 16 subplots of 31.62 m × 31.62 m, 5 m × 5 m and 1 m × 1 m, respectively. Community attributes such as species richness, density, basal area, diversity indices and biomass and carbon storages were computed for each study site. A total of 5 forest communities (2 each from tropical and subtropical and one from temperate forest) were identified. The woody species diversity was highest in the subtropical forest followed by tropical and temperate forest. Altitude played an important role in the Eastern Himalayan Mountains in the establishment and distribution of forest community. Forest community composition changes with elevation, for instance, the dominant communities like Dipterocarpus retusus–Phoebe goalparensis–Schima wallichii (D-P-S), Gmelina arborea–Schima wallichii-Duabanga grandiflora (G-S-D), Schima wallichii–Duabanga grandiflora–Alstonia scholaris (S-D-A), Alstonia scholaris–Terminalia myriocarpa–Bischofia javanica (A-T-B) and Acer thomsonii–Rhodendron arboreum–Quercus lamellose (A-R-Q) were present at elevational ranges of 100–300 m, 300–700 m, 700–1100 m, 1100–1500 m and 1500–1900 m, respectively. The study showed that about 41–57% of the tree species exhibited good regeneration followed by 23–30% as fair, 6–16% as poor, and 6–21% species did not show regeneration along the altitudinal gradient. The total biomass carbon (Mg C ha−1) varied from 84.74 to 163.56 in tropical, 103.12 – 156.41 in subtropical and 133.05 in temperate forest. In conclusion, community composition, regeneration pattern and biomass carbon storage changes along altitude because of altered biophysical characteristics. However, despite variations in elevation, factors for forest disturbance at different altitudes significantly contributed to the community attributes and overall accumulation of biomass carbon. Hence, the traditional management practices carried out by local communities also play a crucial role in shaping the structure, composition, and carbon dynamics of forest ecosystems. Understanding the impacts of these practices is essential for promoting sustainable forest management by conserving forests and preserving carbon stocks for mitigating climate change in future. This study emphasizes the importance of long-term forest monitoring to promote biodiversity conservation and formulate conservation strategies that support sustainable forest management policies to which ensure continuous provision of ecosystem services in the region.

An integrated ecosystem service-based approach for the sustainable management of forested islands in South Korea

Implementing sustainable island forest management policies requires categorizing the islands into groups based on key indicators and establishing a consistent management system. This study proposes a novel framework to support an ecosystem service-based approach to managing forested islands in South Korea. First, a typology of six forested island categories is established based on varying extents of natural vegetation cover (as a percentage of forest cover) and connectivity to the mainland. An analytic hierarchy process (AHP) analysis was conducted with island forest experts to identify priority ecosystem services (ESs) for the sustainable management of each island type. On connected islands, provisioning services (natural resources and natural medicines) are more important than regulatory (erosion control) or supporting services (genetic diversity). On unconnected islands, particularly those with a small proportion of natural vegetation, regulatory services (erosion control) require a greater emphasis on management. Since Type 3 islands require urgent management as connectivity to the mainland makes natural vegetation=sparse island forest ecosystems vulnerable to anthropogenic activities, the land-use scoring method was performed on Jin-do. Comparisons between the AHP-derived expert demand for key island ESs and the spatial distribution of ES supply potential revealed mismatches between supply and demand for erosion control, freshwater supply and habitat provision. The framework developed in this study can help guide policy and decision-making processes and indicate where interventions should be focused to achieve sustainable island management.

Fires as a source of annual ambient PM2.5 exposure and chronic health impacts in Europe

Chronic exposure to ambient PM2.5 is the largest environmental health risk in Europe. We used a chemical transport model and recent exposure response functions to simulate ambient PM2.5, contribution from fires and related health impacts over Europe from 1990 to 2019. Our estimation indicates that the excess death burden from exposure to ambient PM2.5 declined across Europe at a rate of 10,000 deaths per year, from 0.57 million (95 % confidence intervals: 0.44–0.75 million) in 1990 to 0.28 million (0.19–0.42 million) in the specified period. Among these excess deaths, approximately 99 % were among adults, while only around 1 % occurred among children. Our findings reveal a steady increase in fire mortality fractions (excess deaths from fires per 1000 deaths from ambient PM2.5) from 2 in 1990 to 13 in 2019. Notably, countries in Eastern Europe exhibited significantly higher fire mortality fractions and experienced more pronounced increases compared to those in Western and Central Europe. We performed sensitivity analyses by considering fire PM2.5 to be more toxic as compared to other sources, as indicated by recent studies. By considering fire PM2.5 to be more toxic than other PM2.5 sources results in an increased relative contribution of fires to excess deaths, reaching 2.5–13 % in 2019. Our results indicate the requirement of larger mitigation and adaptation efforts and more sustainable forest management policies to avert the rising health burden from fires.

Forest products monetary contribution to households’ income: A means to improve the livelihood of a low-income rural community in South Ethiopia

Forest products and forest-based activities in Ethiopia play a substantial economic contribution to the livelihoods of rural households. Despite its pivotal role, empirical data are inadequate on forests' monetary contribution across a range of ecological locations and social situation, particularly for rural agrarian communities of the developing nations, like Ethiopia. We estimated the economic contributions of forest products and forest-based activities to forest-dependent rural households’ income and highlighted key socioeconomic characteristics in Wolaita, Ethiopia. We collected demographic, socioeconomic, and forest use data using a semi-structured questionnaire survey of 384 households, and surveyed markets to determine the prices of forest products for the valuation of forest use in three districts. We used descriptive statistics, the Chi-square test, the two-sample t-test, and one-way ANOVA to analyze the data. Findings showed that all respondents were engaged in one way or another in forest-based activities, while 84.6 % were involved in farming. The annual average income from forest products was 252.7US per household, contributing to 28.1 % of the total yearly average income (989.4US$), and 38.3 % relative forest income (RFI). Annual mean household income from crops was 648.1US$. Average annual household income from grazing, charcoal, firewood, woodcutting, cut-and-carry, NTFP, seed selling, medicinal plants, and seedling selling was 77.3 %, 58.4 %, 50.2 %, 24.1 %, 18.5 %, 12.7 %, 7.1 %, 6.8 % and 5.4 % of the total annual mean income, respectively revealing a significant difference (p < 0.05). Family size, farmland size, distance to the forest, and occupation were the determinants of the contribution of forest products to household income. In general, poor households derive the highest relative forest income implying high dependence of the poorer on forest resources in the study area. The findings provide useful information for developing sustainable forest management policies and strategies to enhance the economic and ecological benefits of forests, and highlight the need for funding projects to pay attention to the specific household variables that affect forest use. Mainstreaming conservation activities in development sectors and integrating development and conservation projects may improve the livelihood of the low-income family in the region.

Local Economy and Forest-based Livelihood in Gandhamardan Region of Western Odisha

Natural forests play a key role in maintaining the planet’s ecosystems and are also crucial to rural livelihoods, particularly in less developed nations. Indigenous groups still need access to contemporary conveniences and possibilities for employment in remote parts of less developed nations. As a result, the use of forests significantly contributes to household subsistence and income. The economic impact of forest resources on the millions of rural households close to forests has recently been the research focus. This study aims to quantify the distributional influence of forest revenue on economic inequality among rural families in the Gandhamardan Hill area of the Balangir and Bargarh districts of Odisha. It also sought to ascertain absolute and relative forest income. The primary data or information were gathered by utilizing focus groups, direct interviews, structured household-level surveys, and key informant interviews. The results showed that 61.9% of the households in the sample engaged in activities related to the forest. Most of the local population participates in agriculture and forestry as the main source of livelihood. After agriculture revenue, forest income represented the second-most significant income portfolio. The income share for bushmeat was larger than the income share for other forest products. The economic disparity among the studied families was reduced by forest income. Therefore, restricting forest access would negatively affect rural people’s welfare and widen economic gaps. The knowledge from the current study is crucial for creating sustainable forest management policies and strategies that will preserve and increase the economic value of using forests without jeopardizing biodiversity preservation.

Increasing forest carbon sinks in cold and arid northeastern Tibetan Plateau

Arid forest lands account for 6 % of the world's forest area, but their carbon density and carbon storage capacity have rarely been assessed. Forest inventories provide estimates of forest stock and biomass carbon density, improve our understanding of the carbon cycle, and help us develop sustainable forest management policies in the face of climate change. Here, we carried out three forest inventories at five-year intervals from 2006 to 2016 in 104 permanent sample plots covering the Qinghai spruce (Picea crassifolia) distribution in the north slope of Qilian Mountains, northeastern Tibetan Plateau. Results shows that mean biomasses for Qinghai spruce were 133.80, 144.89, and 157.01 Mg ha−1 while biomass carbon densities were 65.52, 70.92, and 76.88 Mg C ha−1, in 2006, 2011, and 2016, respectively. This shows an increase in the Qinghai spruce carbon density of 17.34 % from 2006 to 2016. Both the precipitation and temperature play crucial roles on the increase of aboveground carbon density. The average carbon densities were different among forests with different ages and were higher for older forests. Our results show that the carbon sequestration rate for Qinghai spruce in the Qilian Mountains is significantly higher than the average rates of national forest parks in China, suggesting that this spruce forest has the potential to sequester a significant amount of carbon despite the general harsh growing conditions of cold and arid ecoregions. Our findings provide important insights that are helpful for the assessment of forest carbon for cold and arid lands.

Community forest legislation in India: Rights-based polycentrism or responsibilization?

In India, forest rights of forest-dependent communities are democratized and decentralized under the Forest Rights Act of 2006 (FRA). This paper attempts to explain the weak performance of the community forest resource rights recognized under this legislation. We begin by discerning the enabling and impeding factors that have influenced the operationalization of the community forest resource rights. We found that support from civil society has been crucial in building collective action and social capital. Technical, financial and bureaucratic hindrances in addition to a conflicting regulatory framework were the major barriers. We conceptualized the framework of rights-based polycentrism by combining the rights-based approach and polycentrism, and using this lens analyzed the design of the community forest resource rights. We found that the legislation falls short of making the state accountable and repositioning the role of the forest department as a duty bearer. The Act assigns responsibilities of biodiversity conservation, protection of catchments, sustainable resource use and preservation from destructive practices to the local communities, without provisioning additional funds or functionaries. Also, the state has not played an enabling role by building agency, capacity and institutions, and continues to be substantially invested in local forest management decisions. We opine that unless these design gaps in the legislation are plugged, it will result in rights-based responsibilization and adversely impact the scaling up of decentralized forest governance. Other developing nations can also benefit from using the rights-based polycentrism lens to strengthen the design of their sustainable forest management policy.

Conservation-based mangrove forest management strategy in wosi Manokwari west Papua Indonesia

Degradation of mangrove forests in the Wosi region has negative consequences, including the loss of mangrove forest land and the disruption of marine biota and natural resources in the Doreri Bay region of Manokwari, West Papua. Sustainable tourism that does not harm the environment and ensures a reasonable standard of living for the local people can only be achieved if Mangrove Forest Areas are developed with an ecologically responsible philosophy. The researchers in this study set out to learn more about community involvement in mangrove area management programs and to develop a strategy for the care of tourist attraction artifacts in the mangrove area of Wosi, Manokwari district. Observational methods and case studies formed the basis of the investigation. The goal of this method of observation is to use a quantitatively descriptive approach to examine the interplay between economic, social, and population policies and environmental factors like the Wosi Mangrove Forest. Experts provide their insights on how Indonesia's Ministry of Environment and Forestry (KLHK) has implemented its protected forest rules. But this is not the case for the people who make their homes in the Wosi Mangrove Forest. Both the data on sustainable mangrove forest management policies and the policies themselves were subjected to a SWOT analysis. The SWOT analysis confirmed the importance of community participation in mangrove forest management for the promotion of educational tourism. Karang Taruna Caring for Waste Manokwari is in charge of organizing this educational tour. The Wosi mangrove forest region is hoped to benefit from this method.

A Chronicle of Indonesia’s Forest Management: A Long Step towards Environmental Sustainability and Community Welfare

Indonesia is the largest archipelagic country in the world, with 17,000 islands of varying sizes and elevations, from lowlands to very high mountains, stretching more than 5000 km eastward from Sabang in Aceh to Merauke in Papua. Although occupying only 1.3% of the world’s land area, Indonesia possesses the third-largest rainforest and the second-highest level of biodiversity, with very high species diversity and endemism. However, during the last two decades, Indonesia has been known as a country with a high level of deforestation, a producer of smoke from burning forests and land, and a producer of carbon emissions. The aim of this paper is to review the environmental history and the long process of Indonesian forest management towards achieving environmental sustainability and community welfare. To do this, we analyze the milestones of Indonesian forest management history, present and future challenges, and provide strategic recommendations toward a viable Sustainable Forest Management (SFM) system. Our review showed that the history of forestry management in Indonesia has evolved through a long process, especially related to contestation over the control of natural resources and supporting policies and regulations. During the process, many efforts have been applied to reduce the deforestation rate, such as a moratorium on permitting primary natural forest and peat land, land rehabilitation and soil conservation, environmental protection, and other significant regulations. Therefore, these efforts should be maintained and improved continuously in the future due to their significant positive impacts on a variety of forest areas toward the achievement of viable SFM. Finally, we conclude that the Indonesian government has struggled to formulate sustainable forest management policies that balance economic, ecological, and social needs, among others, through developing and implementing social forestry instruments, developing and implementing human resource capacity, increasing community literacy, strengthening forest governance by eliminating ambiguity and overlapping regulations, simplification of bureaucracy, revitalization of traditional wisdom, and fair law enforcement.

Examining village characteristics for forest management using self- and geographic self-organizing maps: A case from the Baekdudaegan mountain range network in Korea

Understanding the village characteristics linked to forest networks is essential for the scientific management of forest resources. Forests are complex socio-ecological systems. This study classifies the resources and characteristics of forest networks and neighboring villages using unsupervised learning algorithms: self-organizing maps (SOM) and geographic-self-organizing maps (Geo-SOMs). Considering ecological, economic, and sociocultural indicators, 18 covariates of 379 villages in two forest networks of the Baekdudaegan Mountain Range in South Korea were analyzed. The data visualizing map size was fixed based on changes in quantization and topographic errors of the same grid maps, and the number of clusters was determined by comparing K-means and hierarchical clustering techniques. An optimal map size of 17 × 12 grids and six clusters was used for further classification of the input data for both SOM and Geo-SOM analyses. The common characteristics of villages were identified using SOM classification, whereas geographically bounded characteristics were identified using Geo-SOM. The approach introduced in this study can be applied to socio-ecological classification and the design of sustainable forest management policies that link the remote sensing and geographic information systems.

Indigenous knowledge and sustainability concerns in an era of climate change: the Sahariya Adivasi and salai trees (Boswellia serrata) in central India

ABSTRACT Boswellia serrata, or salai is a prominent NTFP species of the Kuno forests in Central India. The Sahariya tribe primarily uses it for its gum-resin (chir). A major share of household income comes from the sale of chir. Long-term association with the Kuno forests, in particular with the salai trees, has allowed the Sahariya to build a repository of indigenous knowledge, which plays a pivotal role in their livelihoods. Indigenous knowledge systems are gaining increasing attention globally, and the wisdom of indigenous communities is getting acknowledged. Using qualitative tools and long-term ethnographic engagement with the Sahariya, this study aims to document their holistic process of management of salai forests and collection of chir. It documents their management practices and belief systems regarding salai. It also highlights sustainability concerns of the community and their perception of how climate change affects salai. The study emphasizes the relevance of situated knowledge systems for a better understanding of sustainability concerns about the forest resources, and the associated impacts on local communities. Recognizing indigenous knowledge of forests and trees can facilitate and improve sustainable forest management and climate change mitigation policies.

Food security and Sustainable Forest Management (SFM) implementation at the Forest Management Unit (FMU) level: A case study in Salarom Taka, Nabawan, Sabah

The forest managed under Sustainable Forest Management (SFM) could contribute to food security, especially for vulnerable communities living in the forest’s vicinity. This study was conducted to determine the local community’s perception of the SFM implementation and food security in Salarom Taka, Nabawan. The interrelation between forest and community’s food security was assessed based on the availability and utilisation of various food resources from four accessible areas: natural forest reserve, forest plantation, alienated land, and resources purchased from the market. The food resources are mainly available and accessible through purchasing, followed by alienated land, forest reserve and forest plantation. Forest contributions are significant, with most communities utilising forest resources for direct food consumption and using fuelwood for food processing. The community depends on the forest to intensify their agricultural production to sustain their food security. The community are less aware of the SFM implementation in their area, but agree with better access to clean water sources, health and education facilities, and more employment opportunities. The roles of forests are strengthened through SFM policy which ensures the forest is managed sustainably, enhancing economic and environmental values that could benefit current and future generations.

Sustainable Forest Management contribution to food security: A stakeholders’ perspectives in Sabah, Malaysia

Implementing Sustainable Forest Management (SFM) policy has contributed to conserving and protecting the forests to remain relevant for future generations. This study determines stakeholders’ viewpoint on the relationship between the implementation of SFM and food security in Sabah. The study was conducted by distributing online questionnaires through the SurveyMonkey platform using convenience sampling methods. Most of the respondents agreed that the forestry sector is still relevant to the development and generation of the economy and revenue to the state of Sabah. Apart from nature-based tourism, wood-based manufacturing, furniture industry, and agroforestry practices, other potential economic-generation segments are indigenous forest food productions, such as wild honey, fruits, vegetables, and game animals. The forestry sector could contribute to food security for Sabah by advancing the current practices and the use of local resources of forest foods. Other prospects are integrating natural and plantation forest management programs with the generation of forest food resources. Factors that could foster the forestry sector’s contribution to food security, among others, are research and innovation, education, involvement of local communities, and the role of government policy on forestry and food security in Sabah.

Integration of VIIRS Observations with GEDI-Lidar Measurements to Monitor Forest Structure Dynamics from 2013 to 2020 across the Conterminous United States

Consistent and spatially explicit periodic monitoring of forest structure is essential for estimating forest-related carbon emissions, analyzing forest degradation, and supporting sustainable forest management policies. To date, few products are available that allow for continental to global operational monitoring of changes in canopy structure. In this study, we explored the synergy between the NASA’s spaceborne Global Ecosystem Dynamics Investigation (GEDI) waveform LiDAR and the Visible Infrared Imaging Radiometer Suite (VIIRS) data to produce spatially explicit and consistent annual maps of canopy height (CH), percent canopy cover (PCC), plant area index (PAI), and foliage height diversity (FHD) across the conterminous United States (CONUS) at a 1-km resolution for 2013–2020. The accuracies of the annual maps were assessed using forest structure attribute derived from airborne laser scanning (ALS) data acquired between 2013 and 2020 for the 48 National Ecological Observatory Network (NEON) field sites distributed across the CONUS. The root mean square error (RMSE) values of the annual canopy height maps as compared with the ALS reference data varied from a minimum of 3.31-m for 2020 to a maximum of 4.19-m for 2017. Similarly, the RMSE values for PCC ranged between 8% (2020) and 11% (all other years). Qualitative evaluations of the annual maps using time series of very high-resolution images further suggested that the VIIRS-derived products could capture both large and “more” subtle changes in forest structure associated with partial harvesting, wind damage, wildfires, and other environmental stresses. The methods developed in this study are expected to enable multi-decadal analysis of forest structure and its dynamics using consistent satellite observations from moderate resolution sensors such as VIIRS onboard JPSS satellites.

국가 지속가능발전목표(K-SDGs)의 시너지 및 상충 관계 분석 : 목표 15(육상 생태계 보전)를 중심으로

South Korea developed Korean Sustainable Development Goals (K-SDGs) to achieve Sustainable Development Goals (SDGs). According to the Sustainable Development Report 2021, South Korea’s performance index of Goal 15 (Life on Land) reflected a decreasing trend. Yet, since the SDGs are all interlinked, implementation strategies should be developed based on their interlinkages. This study aims to suggest forest policies to enhance synergies and reduce trade-offs between K-SDG Goal 15 (Life on Land) and other goals by analyzing the interactions of indicators of Goal 15 (Life on Land) and those of other goals. We surveyed 36 forestry scientists from government research institutes to evaluate the interlinkages. The results show that 115 of 128 indicators have synergy with K-SDG 15 (Life on Land). Among them, indicators 2.2.1 (Farm Household Income), 9.1.1 (Road Supply Rate), 7.2.2 (Share of New • Renewable Energy over Primary Energy), and 11.1.2 (Expansion of Housing Supply) revealed relatively strong trade-offs. We suggested different approaches to mitigate trade-offs such as policies to include forest roads in road expansion plans and to create green spaces in urban development plans. On the other hand, most of the indicators of Goals 7 (Clean Energy), 11 (Sustainable Cities), and 13 (Climate Action) showed synergistic effects. We emphasized sustainable forest management and other policies to enhance the value of forests. In sum, goals are designed to maintain the balance between conserving the environment and development. Thus, we should take account of measures to develop sustainably and to preserve the environment.

Assessment of Forest Wood and Carbon Stock at the Stand Level: First Results of a Modeling Approach for an Italian Case Study Area of the Central Alps

Models for carbon (C) stock assessment are widely applied in forest science, and mainly differ according to the scale of application, the required data, and the objectives for their implementation. This work presents the methodology implemented into the second version of an empirical model, WOody biomass and Carbon ASsessment (WOCAS v2), that uses the data of forest management plans (FMP) to calculate the mass of wood (t∙year−1 of dry matter, DM) and C (t∙year−1 C) at the stand level and from the year in which the FMPs came into force until a predefined reference year, for an Italian Case Study Area of Central Alps. The mass of wood and C are computed for (i) aboveground wood biomass (AWB), (ii) belowground wood biomass (BWB), and (iii) dead organic matter (DOM; i.e., dead wood and litter) according to the 2006 IPCC Guidelines. WOCAS v2 was tested for the first time for 2019 public forest stands (3.67 × 104 ha) of Valle Camonica for the period 1984–2018. Results showed that, in 2018 and at the landscape level, the total living wood biomass (TLB; AWB + BWB) reached 5.35∙106 t DM. TLB yield (t·ha−1·year−1 DM) ranged from 44.72 ± 44.42 t·ha−1·year−1 DM (1984) to 145.49 ± 70.76 t·ha−1·year−1 DM (2018). In the same year, DOM amounted to 6.12∙105 t DM, ranging from 8.28 ± 7.79 t·ha−1·year−1 DM (1989) to 17.11 ± 12.03 t·ha−1·year−1 DM (2015). The total weighted C yield, computed as the sum of C yield in AWB, BWB, and DOM of each stand, ranged from 26.63 ± 26.80 t∙ha−1∙year−1 C (1984) to 80.28 ± 41.32 t∙ha−1∙year−1 C (2018). The results demonstrated that FMPs data can be useful in estimating wood and C mass at the stand level and their variation over space and time for AWB as well as for BWB and DOM, which are not considered in the FMPs. This can represent a starting point for defining sustainable forest management policies and practices to improve forest vitality and conservation in compatibility with ecosystem services provision. Moreover, as the model is based on a standardized methodology it can be applied in any other forest area where the same input data are made available; this may constitute the basis for further applications on a broader scale.

Assessing the Economic Contribution of Forest Use to Rural Livelihoods in the Rubi-Tele Hunting Domain, DR Congo

Forest utilization makes a significant economic contribution to the livelihoods of rural households, especially those living in developing countries. This study was conducted to determine the absolute and relative forest income and measure the distributional impact of forest income on economic inequalities among rural households in the Rubi-Tele Hunting Domain (RTHD), Democratic Republic of the Congo (DR Congo). Household socioeconomic data and other qualitative informations were collected using structured household-level surveys, focus group discussions, and key informant interviews. The study used descriptive statistical analysis, Gini coefficient, and Lorenz curve computation. Additionally, the non-parametric alternative Kruskal–Wallis Test was also used. Findings revealed that 89.76% of the households’ sample were involved in forest-based activities. The annual average income from these forest-based activities was estimated at CDF 1,219,951.58 (USD 659.08) per household, contributing 32.46% to total annual household income. Other income sources share constituted 37.09%, 10.04%, 8.30%, 7.63%, 2.41%, and 2.08% from crop, livestock keeping, business activities, fishing, and non-forest environmental activities, paid employment, and other income sources, respectively. There was a significant difference between annual household income in terms of income sources (p &lt; 0.5). Forest income constituted the second most crucial income portfolio after crop income. Bushmeat income share was higher than other forest products income share. However, the proportion of households involved in firewood extraction was substantial (80.70%). Gini coefficient and Lorenz curve analysis proved that forest income helped reduce economic inequality among the sampled households by 11%. Therefore, reducing access to forest would significantly impact rural households’ welfare and could increase income disparities. The present study provides valuable information for developing sustainable forest management policies and strategies to maintain and enhance the economic benefit of forest use without damaging biodiversity conservation.

Econometrics of the environmental Kuznets curve in the face of climate change and sustainability in Zambia

The main aim of this paper was to test and examine the existence of the Environmental Kuznets Curve (EKC) hypothesis using time-series data (1990–2020). Deforestation was used as a dependent variable signifying environmental degradation. Energy consumption, economic growth, population growth, and trade openness were used as independent variables. The objectives were threefold: to understand the nexus between the independent variables and deforestation; inform policy responses on forestry management and energy development while contributing to the environmental sustainability literature. Designed with several significant tests, the analytical toolkit was drawn from two methodological embodiments - the Autoregressive Distributed Lag bounds test to cointegration, and the Vector Error Correlation Model–Granger causality test. Results suggest cointegration among the variables, both in the short, and long-run time horizons. In the short run, findings reveal ceteris-paribus effects. A unit rise in energy consumption increases the deforestation rate on average ceteris-paribus of 1.5 units. Similarly, a 1% rise in economic growth resulted in 3.5% rise on average ceteris-paribus in the deforestation variable while trade openness resulted in a 5% rise in deforestation. In the long run, a unit rise in energy consumption increased the deforestation rate by 2.2 units, while a 1% rise in economic growth increased the deforestation rate by 2.2%. A 1% rise in population and trade was associated with a 12% and 19% increase in the deforestation variable respectively. We conclude that the EKC hypothesis does not exist in Zambia currently. However, to the policy makers and environmental professionals, these findings suggest a more comprehensive and robust response in energy development and sustainable forest management policies.

Spatially explicit changes in forest biomass carbon of China over the past 4 decades: Coupling long-term inventory and remote sensing data

Quantification of the spatial pattern of forest carbon (C) sinks in high resolution is helpful to reveal the factors that affect the C cycle and provides valuable information for developing sustainable forest management policies. Here we developed a method using the data of long-term forest inventories (1977–2018) and spatially-explicit remotely sensed information from land-use maps and the Normalized Difference Vegetation Index (NDVI) datasets, to estimate the spatial and temporal variation of forest biomass C in China. At first, we calculated forest biomass C stocks using the refined Continuous Biomass Expansion Factor (CBEF) model with parameters for each forest type based on eight national forest inventories. Secondly, based on multi-temporal land-use remote sensing and national forest inventory datasets, we obtained forest coverage datasets with high resolution (1 km*1 km). Thirdly, we downscaled the forest biomass C density using the calibrated forest coverage maps and the maximum NDVI values derived from GIMMS-NDVI3g imagery. Our results showed that China's forest functioned as a C sink of 3777.73 Tg C, and the C density of forest stands increased from 35.41 Mg C ha−1 during 1977–1981 to 43.95 Mg C ha−1 during 2014–2018. In addition, the validation results for most of the provinces based on published inventory estimates during the eight periods showed that the forest area at the pixel scale was successfully calibrated. From this, we produced the maps with a finer resolution for a series of spatially continuous forest biomass carbon density distribution and carbon sinks. Notably eight major forest projects have accounted for 44%–51% of the forest C stocks added in China from 1977 to 2018. Our research provides new insights for understanding and monitoring the spatiotemporal variations in of forest biomass and key information to support the development of new afforestation policies moving forward.