Agarwood resin, produced by certain evergreen tree species native to Southeast Asia, is used for making incenses, medicines and fragrances. A precious commodity for centuries, it has a current market value of USD 32 billion, projected to reach USD 64 billion by 2029 (Ash and Nguyen 2020). However, high trading frequency has led to agarwood species being threatened with extinction in the wild. In response, the Government of Indonesia is promoting agarwood plantations to decrease overexploitation on wild agarwood trees. Under Indonesia’s Nationally Determined Contribution (NDC), the government has targeted the restoration of 14 million hectares (ha) of degraded land including 2 million ha of peatlands by 2030. In addition to restoring biophysical characteristics to recover ecosystem services, the government’s plan provides an opportunity to strengthen climate-resilient livelihoods for local farmers in Kalimantan. Here we review and assess the development of these plantations and the viability of agarwood as a commodity for climate-resilient livelihood options for peatland ecosystem-reliant communities. We found farmers using climate smart agroforestry approaches in planting agarwood, combining it with rubber and other tree species. Plantation-grown agarwood trees require artificial inducement to produce the valuable resinous substance known as ‘agarwood resin’ or simply ‘agarwood’. Local communities are facing major problems with artificial inoculation methods and application. Meanwhile, market potential and trade commerce administration need further development. Agroforestry systems that promote biodiversity by combining agarwood tree species with other non-timber forest products (NTFPs) could enhance local community livelihoods and increase the quality of the agarwood resin they produce.
Tag: degraded land
Restoring Land and Growing Renewable Energy: Opportunities, Challenges, and the Future Steps
Primary energy demand in Indonesia has rapidly increased, i.e., 43.33% between 2005 and 2016, while domestic energy supply failed to fulfill these needs leading to the reliance on the energy import. Meanwhile, a vast area of degraded land in Indonesia also created an opportunity for biofuel production, fulfilling energy demand, as well as restoring the land with environmental and socio-economic benefits. This paper provides an overview of identified potential and challenges associated with biofuel production from degraded land in Indonesia. Our preliminary findings highlighted that some biofuel species in Indonesia are suitable to grow in degraded land and potentially restore the land that may not be suitable for current agricultural production and/or reforestation. The initial finding also shows that culturally familiar species and stable markets are favorable terms of biofuel-species selection for the landowners. Supportive agricultural-extension services such as knowledge and technology for honey production can provide an added value in this concept, in addition to social (e.g., strengthening social solidarity and employment opportunities) and environmental (e.g., carbon storage, soil moisture, erosion control, and biodiversity) benefits. Meanwhile, to create this overall initiative to be successful, a supportive measure from the policymakers is needed. Further research on the capacity of biofuel species to restore degraded lands in different biophysical profiles. Analysis of biofuel production feedstocks and potential co-benefits viable business models, and the stable market is necessary to maximize benefit from biofuel production and to restore the degraded lands in Indonesia.
Carbon Sequestration Potential of Agroforestry Systems in Degraded Landscapes in West Java, Indonesia
When restoring degraded landscapes, approaches capable of striking a balance between improving environmental services and enhancing human wellbeing need to be considered. Agroforestry is an important option for restoring degraded land and associated ecosystem functions. Using survey, key informant interview and rapid carbon stock appraisal (RaCSA) methods, this study was conducted in five districts in West Java province to examine potential carbon stock in agroforestry systems practiced by smallholder farmers on degraded landscapes. Six agroforestry systems with differing carbon stocks were identified: gmelina (Gmelina arborea Roxb.) + cardamom (Amomum compactum); manglid (Magnolia champaca (L.) Baill. ex Pierre) + cardamom; caddam (Neolamarckiacadamba (Roxb.) Bosser) + cardamom; caddam + elephant grass (Pennisetum purpureum Schumach.); mixed-tree + fishpond; and mixed-tree lots. Compared to other systems, mixed-tree lots had the highest carbon stock at 108.9 Mg ha−1. Carbon stock variations related to species density and diversity. Farmers from research sites said these systems also prevent soil erosion and help to restore degraded land. Farmers’ adoption of agroforestry can be enhanced by the implementation of supportive policies and measures, backed by scientific research.
Biomass estimation models for Acacia saligna trees in restored landscapes
Acacia saligna, originating from Australia, is a naturalized multipurpose tree species widely grown to restore degraded lands of Africa. The contribution of A. saligna in biomass restoration can be quantified using a precise estimation of tree biomass carbon. This study developed species-specific allometric models and evaluated the spatial variation of tree biomass across restored areas in exclosures and open grazing landscapes. These models could play a considerable role in the monitoring of carbon dynamics across A. saligna planation dominated areas. We harvested, excavated, and weighed twenty-one sample trees representing different size classes to develop allometric models for the estimation of aboveground (AGB), belowground (BGB) and total tree (TB) biomass. The average dry-to-fresh mass ratio and the root-to-shoot ratio was 0.47 (±0.13) and 0.28 (±0.14), respectively. Tree biomass significantly correlated with diameter at breast height (r = 0.93; P < 0.001), diameter at stump height (r = 0.88, P < 0.001) and tree height (r = 0.56, P < 0.05). Our best biomass estimation models explained 86%, 82% and 87% of variations in AGB, BGB, and TB, respectively. Models using DSH and DSH & H explained 70%–78% of the variation in AGB, BGB, and TB. Estimated C-stock showed a significant relationship with stem density (R2= 0.91, P < 0.01). Estimated TB varied between 1.5–18 Mg ha−1 on grazed land and exclosures. Estimated C-stocks in the exclosure exceeded the estimated C-stock in the open grazing land by ∼60%. This implies that with proper management practices and enrichment planting A. saligna significantly contributes to increasing carbon accumulation on degraded landscapes, playing a key role in climate change mitigation efforts while improving land productivity.
Toward a tenure-responsive approach to forest landscape restoration: A proposed tenure diagnostic for assessing restoration opportunities
The Bonn Challenge, a voluntary global initiative launched in 2011, aims to bring up to 350 million hectares of degraded land into some level of restorative state by 2030. Pilot forest landscape restoration (FLR) efforts indicate that enhancing community and smallholder tenure rights is critical for achieving FLR’s desired joint environmental and social well-being objectives. The Restoration Opportunities Assessment Methodology (ROAM) is a decision support tool that has become widely used in national and subnational FLR planning. Although ROAM is structured so as to encourage inclusion of tenure rights and governance analyses, the extent to which ROAM reports actually incorporate tenure issues is undocumented. To address this gap, we report the results of an analysis of the currently publicly accessible ROAM reports from eight countries in Africa and Latin America. We found that the ROAM reports superficially covered tenure and governance considerations. We recommend design elements for a tenure diagnostic that should facilitate more robust tenure and land governance analyses – to complement ROAM and other FLR planning approaches. We suggest the adoption of a rights-enhanced FLR approach so as to capitalize on the motivating force that strong and secure tenure rights provide for landholders to engage in forest restoration design and practice. Although developed in the context of FLR, the proposed tenure diagnostic should have broad utility for other land use initiatives where tenure rights and security are at stake.
Grazing exclosures increase soil organic carbon stock at a rate greater than “4 per 1000” per year across agricultural landscapes in Northern Ethiopia
The establishment of grazing exclosures is widely practiced to restore degraded agricultural lands and forests. Here, we evaluated the potential of grazing exclosures to contribute to the”4 per 1000” initiative by analyzing the changes in soil organic carbon (SOC) stocks and sequestration (SCS) rates after their establishment on degraded communal grazing lands in Tigray region of Ethiopia. We selected grazing areas that were excluded from grazing for 5 to 24 years across the three agroecological zones of the region and used adjacent open grazing lands (OGLs) as control. Soil samples were collected from two depths (0-15 cm and 15-30 cm) and SOC and aboveground C stocks were quantified in both exclosures and OGLs. The mean SOC stock and SCS rate in exclosures (0-30 cm) were 31 Mg C ha-1 and 3 Mg C ha-1 year-1, which were respectively 166% and 12% higher than that in the OGLs, indicating a positive restoration effect of exclosures on SOC storage. With increasing exclosure age, SOC stock and SCS rate increased in the exclosures but decreased in the OGLs. Higher SOC stock and SCS rate were recorded in 0-15 cm than in 15-30 cm. The relative (i.e., to the SOC stock in OGLs) rates of increase in SOC stocks (70-189‰ year-1) were higher than the 4‰ year-1 and were initially high due to low initial SOC stock but declined over time after a maximum value of SOC stock is reached. Factors such as aboveground biomass, altitude, clay content and precipitation promoted SOC storage in exclosures. Our study highlights the high potential of exclosure for restoring SOC in the 0-30 cm soil depth at a rate greater than the 4‰ value. We argue that practices such as grazing exclosure can be promoted to achieve the climate change mitigation target of the “4‰” initiative.
Dryland restoration successes in the Sahel and Greater Horn of Africa show how to increase scale and impact
Drylands occupy more than 40% of the world’s land area and are home to some two billion people. This includes a disproportionate number of the world’s poorest people, who live in degraded and severely degraded landscapes. The United Nations Convention to Combat Desertification states on its website that 12 million hectares are lost annually to desertification and drought, and that more than 1.5 billion people are directly dependent on land that is being degraded, leading to US$42 billion in lost earnings each year. In Africa, three million hectares of forest are lost annually, along with an estimated 3% of GDP, through depleted soils. The result is that two-thirds of Africa’s forests, farmlands and pastures are now degraded. This means that millions of Africans have to live with malnutrition and poverty, and in the absence of options this further forces the poor to overexploit their natural resources to survive. This in turn intensifies the effects of climate change and hinders economic development, threatening ecological functions that are vital to national economies.
Regreening Africa: A bottom-up transformation of degraded lands
It is estimated that 20% of global land is either degraded or undergoing degradation, leading to an annual loss of 12 million hectares of productive land (UNCCD 2017). In Africa, some 715 million ha are degraded, including 65% of all arable land, 30% of all grazing land and 20% of all forests. This is due to increasing populations, poor land management, institutional challenges and climate change (Gnacadja and Wiese 2016). The benefits of taking action against land degradation outweigh the costs by up to seven times, implying that inaction will cost countries US$490 billion per year, while action to reverse land degradation could generate benefits worth up to US$1.4 trillion (ELD Initiative 2015)
Stochastic analysis of returns on investments in Forest and Landscape Restoration in northern Ethiopia
Forest and Landscape Restoration (FLR) is carried out with the objective of regaining ecological functions and enhancing human well-being through intervention in degrading ecosystems. However, uncertainties and risks related to FLR make it difficult to predict long-term outcomes and inform investment plans. Stochastic Impact Evaluation framework (SIE) was applied to simulate returns on investment in the case of FLR interventions in a degraded dry Afromontane forest while accounting for uncertainties. This poster summarizes the study findings.
Building climate resilience in degraded agricultural landscapes through water management: A case study of Bundelkhand region, Central India
Rainfall variability and water scarcity continue to hamper the food and income security of smallholder farming systems in poverty-affected regions. Innovations in soil and water management, especially in the drylands, are critical for meeting food security and water productivity targets of Agenda 2030. This study analyzes how rainfed agriculture can be intensified with marginal impact on the landscape water balance. The impact of rainwater harvesting structures on landscape hydrology and associated agricultural services was analyzed in the semi-arid Jhansi district of Bundelkhand region in central India. The Parasai-Sindh pilot watershed was subjected to a 5-year (2012–2016) monitoring of rainfed system improvements in water availability and crop intensification due to surface water storage (haveli system), check dams, and field infiltration structures. Hydrological processes were monitored intensively to analyze the landscape’s water balance components. Rainwater harvesting (RWH) structures altered the landscape’s hydrology, limiting average surface runoff from 250 mm/year to 150 mm/year over the study period. Groundwater levels increased by 2–5 m (m), alleviating water scarcity issues of the communities in recurring dry years. Nearly 20% of fallow lands were brought under cultivation. Crop yields increased by 10–70% and average household income increased from US$ 960/year to US$ 2700/year compared to that in the non-intervention landscape. The combined soil–water–vegetation efforts strengthened water resilience and environmental systems in agricultural landscape.