Browsing by Author "Silayo, Dos Santos"

Now showing 1 - 3 of 3

Allometric models for estimating tree volume and aboveground biomass in lowland forests of Tanzania
(International Journal of Forestry Research, 2016) Mugasha, Wilson Ancelm; Mwakalukwa, Ezekiel Edward; Luoga, Emannuel; Malimbwi, Rogers Ernest; Zahabu, Eliakimu; Silayo, Dos Santos; Sola, Gael; Crete, Philippe; Henry, Matieu; Kashindye, Almas
Models to assist management of lowland forests in Tanzania are in most cases lacking. Using a sample of 60 trees which were destructively harvested from both dry and wet lowland forests of Dindili in Morogoro Region (30 trees) and Rondo in Lindi Region (30 trees), respectively, this study developed site specific and general models for estimating total tree volume and aboveground biomass. Specifically the study developed (i) height-diameter (ht-dbh) models for trees found in the two sites, (ii) total, merchantable, and branches volume models, and (iii) total and sectional aboveground biomass models of trees found in the two study sites. The findings show that site specific ht-dbh model appears to be suitable in estimating tree height since the tree allometry was found to differ significantly between studied forests. The developed general volume models yielded unbiased mean prediction error and hence can adequately be applied to estimate tree volume in dry and wet lowland forests in Tanzania. General aboveground biomass model appears to yield biased estimates; hence, it is not suitable when accurate results are required. In this case, site specific biomass allometric models are recommended. Biomass allometric models which include basic wood density are highly recommended for improved estimates accuracy when such information is available.
Poverty and sustainable development impacts of REDD architecture; options for equity growth and the environment
(International Institute for Environment and Development, 2013) Vatn, Arild; Kajembe, George C; Leiva-Montoya, Ruben; Mosi, Elvis; Nantongo, Maria; Silayo, Dos Santos
Socio-economic conditions in REDD+ pilot areas: A synthesis of five baseline surveys
(International Institute for Environment and Development, 2012) Movik, Synne; Birikorang, Gene; Enright, Adrian; Kajembe, George; Lima, Luiza; Marostica, Suelen; Pinto, Thais Megid; Nabanoga, Gorettie; Nantongo, Maria; Namaalwa, Justine; Silayo, Dos Santos; Vatn, Arild
Deforestation and forest degradation are among the most important single sources of emissions of anthropogenic greenhouse gases (GHG), contributing about 17 per cent of total global greenhouse gas emissions annually (IPCC, 2007). Reducing Emissions from Deforestation and Forest Degradation – REDD+ – is a United Nations collaborative initiative that seeks to reduce emissions from forest degradation in developing countries. REDD+ came into being as a response to a UNFCCC decision on REDD+ at the Conference of the Parties (COP) 13 in Indonesia. The REDD+ programme supports processes at the national level to implement REDD+ projects, emphasising the involvement of all relevant stakeholders. The project Poverty and sustainable development impacts of REDD+ architecture: Options for equity, growth and the environment (POVSUS-REDD+) was initiated in 2009, and aims to increase the understanding of how institutions can be created to facilitate the implementation of REDD+ at international, national and local levels, and to what extent its implementation will bring about reductions of greenhouse gas emissions, poverty reduction and sustainable development. The POVSUS project is a collaborative effort led by the International Institute for Environment and Development (IIED) and the Norwegian University of Life Sciences (UMB), with the following partners: Fundação Amazonas Sustentável (Brazil); Civic Response (Ghana); SNV (Viet Nam); Sokoine University of Agriculture, Faculty of Forestry and Nature Conservation (Tanzania); and Makerere University, Faculty of Forestry and Nature Conservation (Uganda). 1 The aim of the project is to generate knowledge on how REDD+ can be designed at international and national levels in order to promote co-benefits, through assessing different options for the distribution and allocation of REDD+ payments. The project works with selected REDD+ pilot projects in each of the five countries to improve understanding of the poverty impacts of REDD+ pilot activities, the relative merits of different types of payment mechanisms and the associated transaction costs. As part of the research, a baseline study was carried out in pilot sites in all five countries, to map out the existing livelihood conditions, production constraints and resource use practices before the pilot projects were introduced. While this was important so that the impacts of introducing REDD+ projects could be measured later, the baseline study also undertook to identify potential challenges for establishing and running REDD+ activities and to understand the expectations and demands of households and communities. Each study included a survey, focus group discussion, and interviews with local ‘resource persons’. This report synthesises the main findings from these studies. For more detailed information, the reader is referred to the specific country reports. This overarching report is structured as follows: section 2 describes the pilot areas studied, section 3 gives an overview of household characteristics and livelihoods, section 4 discusses tenure systems and forest management, section 5 looks at perceptions of climate change and demands concerning REDD+, while the final section offers concluding remarks and reflections on the implications for REDD+. Since this is a synthesis report, it only touches on the key features of each country and pilot. Given the geographical spread and the diversity of the five pilot areas, there was considerable variation in the findings of the baseline studies. Below is a brief description of each pilot area.