Payment for ecosystem services for an urban water supply watershed: a business case of Rejoso Kita, Indonesia

Agriculturally dominated land cover in upper and midstream of urban source watershed becomes key determinants for safeguarding good provisions of ecosystem services and water-related disasters. Payment for ecosystem services (PES) is an incentive-based scheme as a part of environmental governance tools that enables halting the watershed degradation by creating interrelationships between land managers of source watersheds and the urban users who depend on them. The Rejoso Kita initiative is piloting the PES schemes targeting productive landscapes and smallholders in rural developing country context.

State of biomass resources in refugee-hosting landscapes: the case of Rhino Camp and Imvepi Refugee Settlements in West Nile, Uganda

Already under pressure from demands such as charcoal and tobacco curing, woody vegetation in refugee-hosting areas in West Nile region in northwestern Uganda currently faces extreme extraction pressure. A large influx of refugees from South Sudan has caused a significant loss of biomass as they have sought to meet their basic needs. The main drivers of biomass loss are energy and shelter. This assessment focuses on the two refugee settlements in West Nile’s Arua district. Imvepi and Rhino Camp Refugee Settlements are located in swathes of woody savannah that also contain some closed woodland. The refugees co-exist with the host communities, and both communities consist almost entirely of farming families that are highly natural resource dependent. The assessment has two main aims: 1) to understand the status of vegetation in Imvepi and Rhino Camp Refugee Settlements and in the surrounding area or buffer zone, much of which is inhabited by the host community; and 2) to estimate the biomass potential in the landscape, particularly the above-ground biomass (AGB), which is the portion of biomass that communities require for direct use. Key findings from this assessment include: • The average density of standing trees with a diameter at breast height (dbh) of more than 10 cm was 75, 152 and 62 trees per hectare (ha) in the buffer area, Imvepi Refugee Settlement and Rhino Camp Refugee Settlement, respectively. • A total of 81 tree species were identified; of these, 73 were native and eight were exotic. In all three areas, the most commonly occurring tree species were indigenous. • The two refugee settlements are dominated by Acacia spp, Grewia spp and Combretum spp. Leading species in the buffer zone include Isoberlina doka, Pseudocedrela kotschyi, Combretum spp and Bridelia scleroneura. • Extraction pressure is intense. The average number of tree stumps was 33, 51 and 56 per ha in the buffer zone, Imvepi Refugee Settlement and Rhino Camp Refugee Settlement, respectively. • Some species are under particularly intense extraction pressure. Stumps of Acacia hockii, Combretum spp and Bridelia scleroneura were the most common. • In all three areas, trees with a dbh of more than 20 cm were the most likely to be cut down, leading to a sharp decline in mature trees. • The AGB of trees was found to be 395,790 tons in the buffer zone, 368,035 tons in Imvepi Refugee Settlement, and 659,521 tons in Rhino Camp Refugee Settlement. Total tree woody biomass across the area was 1,423,345 tons. • Largely consisting of Harrisonia abyssinica, Lantana camara and Capsicum frutescens, shrubs contributed 71,841 tons of AGB. • Total woody biomass was an estimated 1,495,186 tons. • Given the rates of use, and if refugees utilize only AGB within the two settlements, the area would be stripped bare in just 4 to 7 years. • Drawing on AGB in areas outside the refugee settlements could extend this time period, but result in conflicts with host communities. Urgent measures are needed to stem biomass and species diversity loss. This assessment makes multiple recommendations on the way forward, including: 1. Conduct inventories of plot content prior to plot allocation so that management options can be put in place by and for the refugees. 2. District officials, refugee and host communities, agencies and other stakeholders to build a system to enable the planting, growing, regeneration and protection of trees. 3. Ensure consensus on priority areas to plant, regenerate and protect. 4. Agree on how to control burning of biomass and contain livestock. 5. Ensure that endangered tree species are marked, and awareness is created about their importance.

Restocking woody biomass to reduce social and environmental pressures in refugee-hosting landscapes: Perspectives from Northwest Uganda

In the last decade, the influx of over a million refugees into northern Uganda, particularly from South Sudan and the Democratic Republic of Congo (DRC) has steeply increased pressure on the natural environment. The demand on woody vegetation for various uses and the need to create space for newcomers have progressively denuded the landscape. This has the potential to fuel tension between the host communities and refugees, which if left to simmer could create another conflict. Identifying strategies that are innovative to meet the demand for wood and its products in such a way that trees and shrubs, and the ecosystem services they provide, can be available and delivered to both host and refugee communities is critical. The aim of this study was to improve understanding of the perceptions of refugee and host communities towards deforestation and the various options to address the emerging wood fuel shortage in and around Imvepi Refugee Settlements and Rhino Camp in Arua district, Uganda. A survey of households and farms was conducted to determine various viewpoints among the refugee and host communities, and their options for regaining tree cover. About 84% of the respondents, from both communities, agreed that environmental degradation is taking place, mainly due to cutting of trees for firewood, baking bricks and extraction of timber and poles for construction. Using stump density as the degradation proxy, it was discovered that almost 60% of the tree cover had been depleted in and around settlements over the last 2-4 years. To address the challenges of deforestation and the high demand for wood products, respondents proposed a three-pronged approach: tree planting and growing, conserving existing trees and promoting natural regeneration of trees with sprouting stumps. This study which mostly focused on planting, found that the average number of trees that refugee households were willing to plant was in the order of 50 and 32 in Imvepi and Rhino Camp, respectively. However, host community members had considerably more land and stated that they were willing to plant 863-1,249 trees per household. Further, refugee respondents indicated that they would plant 66% of the trees along the boundary of their plots, with the rest being planted inside the plot and around their houses. On their part, host community members stated that more than 66% of the trees that they had indicated they would plant would ideally be placed in woodlots. Both communities noted that they would require support in the following: acquisition of planting materials and farm equipment, and training in the management of trees. Refugees stated that they needed additional land for trees. Based on the study findings and expert opinion, 5-6 tree-growing options are recommended for refugees and host communities in and around Imvepi Refugee Settlements and Rhino Camp. In addition, refugees generated a visualization of how trees might be integrated into a typical refugee plot. Both communities expressed a strong preference for exotic species, viii despite a high reliance on native species. This requires addressing through sensitization since, among other benefits, indigenous species provide nutrition and underpin ecosystem services and biodiversity. Although choice of tree species is always location-specific, the results and recommendations of this study provide a valuable guide for implementing partners seeking to restore degraded environments in refugee and host community areas in Uganda and beyond.

Multigene phylogenetic analyses to establish new Valsaria species and taxonomic significance of spore ornamentation

During our studies on fungal diversity from plant substrates, a new species of Valsaria was isolated from dead branches of Ostrya carpinifolia. The taxon is morphologically similar to other taxa in Valsariaceae and is characterized by pseudostromata, apically free pseudoparaphyses, bitunicate asci, and dark brown, 2-celled ascospores. However, it differs from extant species in number of guttules and ornamentation of spore. It is introduced herein as Valsaria ostryae sp. nov. within the family Valsariaceae. Multigene phylogenies based on combined LSU, ITS and RPB2 DNA sequence data generated from maximum likelihood, maximum parsimony and MrBayes analyses indicate that V. ostryae is basal to V. lopadostomoides and V. rudis and its establishment as a new species is strongly supported. No discordance was found between our morphological and phylogenetic species boundaries as postulated by other researchers and our molecular data strongly supports ornamentation of spore as useful for species delineation. Valsaria species do not appear to be host specific. Full morphological details are provided herein and phylogenetic relationships of Valsaria species are also discussed in light with host association.

Compost Amended with N Enhances Maize Productivity and Soil Properties in Semi‐Arid Agriculture

Declining soil fertility and crop yields are common in arid and semi–arid areas. Sustainable technologies that halt or reverse this trend are required to ensure food security. The use of compost for soil amendment should build soil resilience to drought. However, manure (which is a raw material in compost production) is used as a fuel in many semiarid regions of the world. To encourage farmers to change from using manure or composts as fuel to adopting them as soil additives, it will be necessary to demonstrate the production benefits associated with such additives. A 2‐yr field experiment was conducted in a semi‐arid (steppe) desert environment in Pakistan on sandy‐loamy soils. Poultry manure compost (PMC), pressmud compost (PrMC), and urea (U) were compared in a maize–maize (Zea mays L.) cropping system. The PMC and PrMC application increased soil organic carbon (SOC) and N as well as the soil’s moisture content, but decreased the soil electrical conductivity (ECe) and pH after 2 yr. Replacing 25% of the U with PMC increased the mineral N and mean crop growth rate by 46%, the net assimilation rate by 30% and the yield by 219%, compared to the control. These results were comparable to applications of U alone and PMC with urea in a 25:75 application ratio. These results demonstrate that in semiarid regions, adding manure or compost as a soil additive improves the soil’s yield potential.

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