Ground Flora Species Richness and Diversity in Traditional Forests of Southwest, Nigeria

Diversity indices of tree species in tropical rainforest have been studied, but less effort has been devoted to the ground flora studies especially in sacred groves of tropical rainforest, Nigeria, as it plays a critical role in nutrient cycling and energy flow within the forest ecosystem. This study was carried out to determine the ground flora species diversity, richness and density in five traditional forests (Igbo-Ile, Igbo-Oba, Igbo-Olua, Igbo-Olodumare Igbo-Gbopo) of southwestern Nigeria. The ground flora enumeration of 5 x 10m was laid at the centre of 50 x 50m laid in each of the sacred grove. All plants with dbh 64 10cm were identified and the frequency of occurrence recorded. In all the Sacred Groves, a total of 14064 plants/ha individual were recorded with 80 species distributed among 36 families. Igbo-Oba had highest diversity index of 3.21, followed by Igbo-Olodumare (2.80), Igbo-Ile (2.42). The least diversity index was recorded in Igbo-Gbopo (1.97). Among the 36 families, maximum species was recorded in Sterculiaceae (10), followed by Euphorbiaceae (5), Apocynaceae (4), Combretaceae (4) and Sapindaceae (4). Among the families with lowest frequencies (1) recorded are: Acanthaceae, Araceae, Rutaceae, Sapotaceae, Solanaceae. The study concludes that anthropogenic disturbances observed, e.g. farming, spiritual engagements etc. around Igbo-Olua and Igbo-Gbopo might have contributed to low diversity index compared to Igbo-Ile, Igbo-Oba and Igbo-Olodumare where high diversity index was recorded. It is recommended that to maintain high diversity index in the scared groves, buffer zones should be created around the sacred groves

Ecological and Structural Characteristics of Riparian Forest in Omo Biosphere Reserve

An investigation on the structural characteristics of the riparian forest in Omo Biosphere Reserve was carried out. The structure was analyzed through diameter class distribution, basal area and breast height. Riparian forest showed a major characteristic in the physiognomy of forests along major river, streams and Upland vegetation and the Core, Buffer and Transition zones that is highly variable in the diameter class distribution (reserve J type), Mean basal area per hectare for major river is 294,089.30/cm2/ ha, Stream 613.027/cm2/ha, and Upland 205,648 cm3/ha. Mean basal area for core is 507,399.50 cm2/ha, buffer had 340,699 cm2/ha and transition 264,656 cm2/ha. While mean volume per hectare for core is 7955.2 m3/ha, buffer 7260 m3/ha and Transition 6254.4 m3/ha. Maximum dbh of 246 cm was obtained in the core species. Many stands of riparian forests are facing various levels of structural and floristic simplification, which include fundamental transformations in vegetation physiognomy from dense stands to riparian scrub or bare land

Five insights from the Global Burden of Disease Study 2019

The Global Burden of Diseases, Injuries, and Risk Factors Study (GBD) 2019 provides a rules-based synthesis of the available evidence on levels and trends in health outcomes, a diverse set of risk factors, and health system responses. GBD 2019 covered 204 countries and territories, as well as first administrative level disaggregations for 22 countries, from 1990 to 2019. Because GBD is highly standardised and comprehensive, spanning both fatal and non-fatal outcomes, and uses a mutually exclusive and collectively exhaustive list of hierarchical disease and injury causes, the study provides a powerful basis for detailed and broad insights on global health trends and emerging challenges. GBD 2019 incorporates data from 281 586 sources and provides more than 3.5 billion estimates of health outcome and health system measures of interest for global, national, and subnational policy dialogue. All GBD estimates are publicly available and adhere to the Guidelines on Accurate and Transparent Health Estimate Reporting. From this vast amount of information, five key insights that are important for health, social, and economic development strategies have been distilled. These insights are subject to the many limitations outlined in each of the component GBD capstone papers.Peer reviewe

Traditional African Knowledge In Biodiversity Conservation

The tropical forest ecosystem is one of the most important ecosystems of the world, because it contains a large proportion of the world’s biodiversity and provides many environmental functions. Local communities have successfully conserved these resources that are of interest to them through laws and taboos. These range from fetish forests, burial-site forests, mystic-club forests and so on. People experience the sacred nature of forests, rivers, streams or mountains; through the beliefs they have on them as sources of power and of blessings and as abodes of their ancestors and the dead. Traditional religion and cultural practices thus contributed greatly to restricting and controlling the utilization of the resources. These traditional practices show that there is a big storehouse of knowledge built into traditional informal education provided orally and practically by parents, family and society. The loss of certain aspects of our cultures has reduced the possibility of imaginative new approaches. To achieve the objective of applying traditional Afrrcan knowledge in biodiversity conservation the interest of local communities must be properly addressed in policy formulation

Factors That Determine The Uses Of Some Timber Species In Irewole Local Government Ikire Osun State

The study identified the factors that determine the uses of some timber species in Osun State. The study covered Irewole Local Government Area, Ikire. Four wood-based industries were sampled namely, furniture, fuel wood selling, building construction/ carpentry and wood carving. A well structured questionnaire was administered in which 80 respondents were interviewed. The data were analysed using descriptive statistics.It was observed that 42.25% of the wood-based industry agreed strongly on hardness as a factor for wood product utilisation, 25% agreed on toughness, 15% choose direction of grain, 11.25% supported flexibility and 6.25% agreed strongly on stiffness. From the study It was obvious that hardness is the major determinant parameter adopted by the people in utilizing their wood products. In terms of source of getting the species used, 56.25% obtained their timber from sawmills, 27.5% from marketwhile 16.25% obtain their own directly from forest reserves. This indicates that sawmills are the major sources of producing various timber species needed for wood works in the study area. The result revealed that those in the age range 18 to 40 years were found to be active in the wood-based industries because it is energy sapping. The most common timber species used in the area were Millicia excelsa, Terminalia superba, Afzelia africana etc. .This paper recommended that research activities should be embarked upon to increase the quality of wood products so as to increase future utilization

Subnational mapping of HIV incidence and mortality among individuals aged 15-49 years in sub-Saharan Africa, 2000-18 : a modelling study

Background High-resolution estimates of HIV burden across space and time provide an important tool for tracking and monitoring the progress of prevention and control efforts and assist with improving the precision and efficiency of targeting efforts. We aimed to assess HIV incidence and HIV mortality for all second-level administrative units across sub-Saharan Africa. Methods In this modelling study, we developed a framework that used the geographically specific HIV prevalence data collected in seroprevalence surveys and antenatal care clinics to train a model that estimates HIV incidence and mortality among individuals aged 15-49 years. We used a model-based geostatistical framework to estimate HIV prevalence at the second administrative level in 44 countries in sub-Saharan Africa for 2000-18 and sought data on the number of individuals on antiretroviral therapy (ART) by second-level administrative unit. We then modified the Estimation and Projection Package (EPP) to use these HIV prevalence and treatment estimates to estimate HIV incidence and mortality by second-level administrative unit. Findings The estimates suggest substantial variation in HIV incidence and mortality rates both between and within countries in sub-Saharan Africa, with 15 countries having a ten-times or greater difference in estimated HIV incidence between the second- level administrative units with the lowest and highest estimated incidence levels. Across all 44 countries in 2018, HIV incidence ranged from 2.8 (95% uncertainty interval 2.1-3.8) in Mauritania to 1585.9 (1369.4-1824.8) cases per 100 000 people in Lesotho and HIV mortality ranged from 0.8 (0.7-0.9) in Mauritania to 676.5 (513.6-888.0) deaths per 100 000 people in Lesotho. Variation in both incidence and mortality was substantially greater at the subnational level than at the national level and the highest estimated rates were accordingly higher. Among second-level administrative units, Guija District, Gaza Province, Mozambique, had the highest estimated HIV incidence (4661.7 [2544.8-8120.3]) cases per 100 000 people in 2018 and Inhassunge District, Zambezia Province, Mozambique, had the highest estimated HIV mortality rate (1163.0 [679.0-1866.8]) deaths per 100 000 people. Further, the rate of reduction in HIV incidence and mortality from 2000 to 2018, as well as the ratio of new infections to the number of people living with HIV was highly variable. Although most second-level administrative units had declines in the number of new cases (3316 [81.1%] of 4087 units) and number of deaths (3325 [81.4%]), nearly all appeared well short of the targeted 75% reduction in new cases and deaths between 2010 and 2020. Interpretation Our estimates suggest that most second-level administrative units in sub-Saharan Africa are falling short of the targeted 75% reduction in new cases and deaths by 2020, which is further compounded by substantial within-country variability. These estimates will help decision makers and programme implementers expand access to ART and better target health resources to higher burden subnational areas. Copyright (C) 2021 The Author(s). Published by Elsevier Ltd.Peer reviewe

Review of Reduced Order Models for Heat and Moisture Transfer in Building Physics with Emphasis in PGD Approaches

International audienc