Natural Sciences

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A century of human-induced environmental changes and the combined roles of nutrients and land use in Lake Victoria catchment on eutrophication
(Science of the Total Environment, 2022) Njagi, Dennis M.; Joyanto, Routh; Odhiambo, Moses; Luo, Chen; Laxmi, Gayatri Basapuram; Olago, Daniel; Val, Klump; Curt, Stager
Lake Victoria, a lifeline for millions of people in East Africa, is affected by anthropogenic activities resulting in eutrophication and impacting the aquatic life and water quality. Therefore, understanding the ongoing changes in the catchment is critical for its restoration. In this context, catchment and lake sediments are important archives in tracing nutrient inputs and their dominant sources to establish causality with human activities and productivity shifts. In this study, we determine the 1) changes in concentrations of total organic carbon (TOC), black carbon (BC), total nitrogen (TN), C/N ratio, and phosphorous (P) fractions in catchment sediments and the open lake, 2) distribution of diatom population in the lake, and 3) land use and land cover changes in the catchment. The distribution of TOC, BC, TN, C/N, and P correlate while showing spatial and temporal variations. In particular, the steady increase in BC confirms atmospheric inputs from anthropogenic activities in the catchment. However, lake sediments show more variations than catchment-derived sediments in geochemical trends. Notably, the catchment has undergone dramatic land use changes since the 1960s (post-independence). This change is most evident in satellite records from 1985 to 2014, which indicate accelerated human activities. For example, urban growth (666–1022%) and agricultural expansion (23–48%) increased sharply at the expense of a decline in forest cover, grassland, and woodlands in the catchment. Cities like Kisumu and Homa Bay expanded, coinciding with rapid population growth and urbanization. Consequently, nutrient inputs have increased since the 1960s, and this change corresponds with the divergence of diatom communities in the lake. In addition, the transition to Nitzschia and cyanobacteria mark increasing cultural eutrophication in the lake. The geochemical trends and statistical data support our inference(s) and provide insights into urban development and agriculture practices, which propelled increased nutrients from the catchment and productivity shifts in the lake.
A Century of Water–Socioecological Dynamics and Evolutionary Stages in Lake Victoria Basin, East Africa
(MDPI AG, 2025-04) Zhang, Xinxin;; Wang, Mengyuan;; Jin, Shiying ;; Kimirei, Ismael A.;; Gao, Qun
Understanding the feedback relationships and evolutionary stages of water–socioecological systems (W-SESs) is crucial for achieving sustainable development in basins. This study focuses on the Lake Victoria Basin (LVB) in East Africa, where population growth, rapid urbanization, and developing industrialization have intensified water resource supply–demand conflicts, leading to socioecological issues such as water environmental degradation and ecological conflicts. The objective of this research is to develop a theoretical framework for the Lake Victoria Basin W-SESs (LVB-WSESs) based on the SES framework, identify the main drivers and critical nodes in the evolution of the LVB-WSESs, analyze the root causes of water–society–ecology conflicts, and explore the feedback relationships and evolutionary stages of the LVB-WSESs over the past century. To achieve this, we employed an integrated qualitative and quantitative analysis of historical data combined with tipping point detection to systematically assess the dynamics of the LVB-WSESs. Our findings show that, under the drivers of climate change (with a 1 °C increase in annual temperature since 1920s), population growth (a six-fold increase since 1920s), economic development, land-use change, urbanization, and species invasion, the basin’s demand for water resources, water environments, and aquatic ecosystems has continually increased, leading to the gradual degradation and imbalance of the basin’s ecological functions. The evolution of the LVB-WSESs can be divided into five stages against the historical backdrop of societal transitions from colonial to independent democratic systems: the stable resource utilization period, the slow environmental change period (1920s–1960s), the rapid environmental imbalance period (1960s–1990s), the transition period from environmental imbalance to protection (1990s–2015), and the reconstruction period of socioecological equilibrium. This study not only enhances understanding of the long-term dynamics of the LVB-WSESs but also provides practical implications for sustainable water management in similar basins globally. It enriches the local practice of global sustainable development theories, providing new theoretical perspectives and case references for future watershed sustainable management. By identifying critical drivers and evolutionary stages, our findings can inform policy decisions and interventions to mitigate socioecological conflicts and achieve basin-level sustainability. Publicly Available Content Database
A Characterization of the Drivers, Pressures, Ecosystem Functions and Services of Namatala Wetland, Uganda
(Environmental Science & Policy, 2013) Namaalwa, S.; dam, A.A. Van; Funk, A.; Ajie, G.S.; Kaggwa, R.C.
Namatala wetland near the town of Mbale in the Eastern region of Uganda is a papyrus wetland that is subject to conversion for agriculture (mainly rice farming) and pollution by wastewater. The main goal of this study was to analyze the ecosystem functions and services of Namatala wetland and their drivers of change, and to suggest directions for sustainable use. Data on climate, hydrology, water quality, population and land use were collected. Stakeholder workshops were organized at national and local levels to identify stakeholder interests in the wetland and conflicts. The institutional context for management of Namatala wetland was analyzed. A qualitative assessment of the ecosystem services was performed. All results were integrated into a DPSIR network showing the drivers of change, impact on ecosystem services and possible responses for management. Results show that the communities around Namatala wetland strongly depend on the wetland ecosystem for provisioning services. A spatial gradient in ecosystem services was observed. The upper, converted part of the wetland is more important for provisioning services while the lower, more intact wetland supports regulating and habitat ecosystem services. The institutional framework is complex due to the involvement of several ministries at the national level and several levels of decentralized, local government. Horizontal and vertical coordination of policy implementation is weak. There are diverging perceptions among stakeholders about the priority issues in wetland management. Resource users worry about water and land use conflicts, while local and national government agencies are more concerned about agricultural encroachment and biodiversity loss. There are also differences in interpretation of land ownership between the national wetland policy and local customary arrangements. For sustainable management of Namatala wetland, there is a need for more horizontal and vertical coordination in wetland policy implementation, application of sustainable agriculture and integrated water and nutrient management techniques, and continued monitoring, research and capacity building to support adaptive management.
A Curriculum-Based Approach to Teaching Biosafety Through eLearning
(Frontiers in Bioengineering and Biotechnology, 2018) Ndolo, Dennis O.; Wach, Michael; Rüdelsheim, Patrick; Craig, Wendy
Anyone working in biosafety capacity enhancement faces the challenge of ensuring that the impact of a capacity enhancing activity continues and becomes sustainable beyond the depletion of funding. Many training efforts face the limitation of one-off events: they only reach those people present at the time. It becomes incumbent upon the trainees to pass on the training to colleagues as best they can, whilst the demand for the training never appears to diminish. However, beyond the initial effort to establish the basic content, repeating capacity enhancement events in different locations is usually not economically feasible. Also, the lack of infrastructure and other resources needed to support a robust training programme hinder operationalizing a “train-the-trainer” approach to biosafety training. One way to address these challenges is through the use of eLearning modules that can be delivered online, globally, continuously, at low cost, and on an as-needed basis to multiple audiences. Once the modules are developed and peer-reviewed, they can be maintained on a remote server and made available to various audiences through a password-protected portal that delivers the programme content, administers preliminary and final exams, and provides the administrative infrastructure to register users and track their progress through the modules. Crucial to the implementation of such an eLearning programme is an approach in which the modules are intentionally developed together as a cohesive curriculum. Once developed, such a curriculum can be released as a stand-alone programme for the training of governmental risk assessors and regulators or used as accredited components in post-graduate degree programmes in biosafety, at minimal cost to the government or university. Examples from the portfolio of eLearning modules developed by the International Centre for Genetic Engineering and Biotechnology (ICGEB) are provided to demonstrate these key features.
A dataset of cassava whitefly count images
(Data in Brief, 2022) Nakatumba-Nabende, Joyce; Tusubira, Jeremy Francis; Babirye, Claire; Nsumba, Solomon; Omongo Abu, Christopher
Whiteflies are insect vectors that affect a variety of plants such as tomatoes, cabbages, sweet potatoes, eggplants, and cassava. In Uganda, whiteflies are a major contributor to the spread of Cassava Brown Streak Disease (CBSD). By suckling on infected cassava plants, whiteflies can potentially transfer the Cassava Brown Streak Virus that causes CBSD to unin- fected clean plants nearby when they migrate. When they attack the cassava plants in large numbers, whiteflies can also cause significant physical damage through suckling. This eventually can lead to leaf loss or plant death. Whiteflies also excrete “honeydew”, which harbors a fungus known as “sooty mold”that covers the leaves, limiting access to sun- light which in turn affects plant food production. As part of their work, the cassava breeders often conduct studies to as- sess the population of whiteflies in cassava fields through a manual process of visual inspection which can be arduous and time-consuming. This paper presents a cassava whitefly dataset that has been curated to enable researchers to build solutions for the automation of the count and detection of whiteflies. The dataset contains 3,0 0 0 images captured in a whitefly trial site in Uganda. It depicts different variations of whitefly infestation from low to high infestation. This data has already been used to provide a proof-of-concept solution for whitefly counting based on Machine Learning approaches.
A dataset of necrotized cassava root cross-section images
(Data in brief, 2020) Nakatumba-Nabende, Joyce; Akera, Benjamin; Tusubira, Jeremy Francis; Nsumba, Solomon; Mwebaze, Ernest
Cassava brown streak disease is a major disease affecting cas- sava. Along with foliar chlorosis and stem lesions, a very common symptom of cassava brown streak disease is the development of a dry, brown corky rot within the starch bearing tuberous roots, also known as necrosis. This paper presents a dataset of curated image data of necrosis bearing roots across different cassava varieties. The dataset contains images of cassava root cross-sections based on trial harvests from Uganda and Tanzania. The images were taken using a smartphone camera. The resulting dataset consists of 10,052 images making this the largest publicly available dataset for crop root necrosis. The data is comprehensive and contains different variations of necrosis expression including root cross-section types, number of necrosis lesions, presentation of the necrosis le- sions. The dataset is important and can be used to train ma- chine learning models which quantify the percentage of cas- sava root damage caused by necrosis.
A facile polymerisation of magnetic coal to enhanced phosphate removal from solution
(Journal of Environmental Management, 2019-10-28) Kajjumba, George William; Aydın, Serdar; Osra, Faisal; Wasswa, Joseph
Globally, there are increased threats to available freshwater resources due to pollution, climate change, and increased demand from population growth. Phosphorus is one of the essential nutrients required for animal and plant growth. However, when it is released into freshwater resources in excess amounts, it can become a pollutant through eutrophication. This study aimed to enhance the removal of phosphate from water using modified coal. The coal was magnetised by in-situ synthesis using a precipitation technique. To obtain functional groups and mechanical stability, magnetised coal particles were coated with polyaniline, via the polymerisation of aniline to form Magnetised Unburnt Coal Polyaniline (MUC-PANI). The properties of MUC-PANI were investigated using TGA, BET, XRD, Raman spectroscopy, SEM, and FTIR. TGA reviewed MUC-PANI as 58% magnetised coal and 42% polyaniline, while the specific surface area increased from 30.0 to 42.2 m2/g after modification. SEM indicated a cauliflower structure on the surface of MUC-PANI due to the successful polymerisation of polyaniline. The FTIR spectrum showed successful adsorption of phosphate due to the formation of incipient peak at1008 cm−1. The adsorption kinetic data are better fitted to the Elovich model. The Langmuir adsorption capacity of MUC-PANI is 147.1 mg PO43−/g at 25 °C and pH 5.0 (initial concentration 10-200 mg/L, dose 0.8 g/L). MUC-PANI is a cost-efficient compound for removal of phosphate because it is made from readily available coal.
A Framework for Interdisciplinary Research Methodology in Agroforestry: A Review
(East African Nature and Science Organization, 2025-02-06) Buyinza, Joel; Sekatuba, Jude; Kalanzi, Fred
This paper provides a framework for interdisciplinary research (IDR) methodology in agroforestry, motivated by a general belief that by drawing information from different fields and employing different methodologies, a broad understanding of an existing issue can be achieved. Literature from four scientific paradigms was reviewed to recommend a suitable paradigm for IDR in agroforestry. We promote a pluralistic approach around the concept of ‘what works’ such that agroforestry research and extension focus on applications of techniques to solve a problem. The study suggests a framework for IDR in the context of developing countries by modifying an existing Methodology for Interdisciplinary Research (MIR) framework that was developed to help cross disciplinary borders, especially those between the natural sciences and the social sciences. The existing framework is however limited to real-life applications in teaching and research. We contend that agroforestry research should be seen to benefit the rural poor, foster innovation and farm productivity to feed the growing world population and help farmers adapt to the changing climate. The suggested IDR framework therefore caters for extension and feedback mechanisms, that appear to be the missing link between research and education. The new framework further provides for social relevance and the generation of data for informing policy decisions relating to sustainable agriculture. The paper also highlights the main barriers and opportunities for implementing IDR in agroforestry. The current and future global complex agricultural challenges require experts with interdisciplinary experience. Therefore, interdisciplinary research in agroforestry must increasingly become the standard rather than the exception because the approaches needed and the implications of agroforestry research are by their very nature interdisciplinary.
A Framework for Managing Water Quality from Hand-dug Well: A Case of Mutukula Town Council, Uganda
(East African Nature and Science Organization, 2025-02-09) Tumwebaze, Yosam; Agunyo, Miria Frances; Wozei, Eleanor; Nkambwe, Sarah Kizza
This research proposed the adoption of a framework as a supporting tool to enhance the management of the quality of water from hand-dug wells in Mutukula Town Council, Uganda. Although water from hand-dug wells is often considered prone to contamination, no such study has been carried out for Mutukula Town Council. Adopting both qualitative and quantitative approaches including the use of surveys, experimentation and tools such as the sanitary inspection package developed by the World Health Organization, the research clearly indicated that not only was the quality of water from the 5 wells considered poor but that the wells also lacked pertinent components such as secure covers, drainage provisions, headwalls among others. Moreover, the absence of regulatory tools/guidelines, and cultural and socioeconomic practices amongst community members further contributed to risks associated with using water from these wells. This research proposes a framework that can be adopted by respective local authorities to enhance management and monitoring of water quality and it incorporates key components of training and capacity building, collective supervision and encouraging regular engagements with the various stakeholders
A global perspective on soil science education at third educational level; knowledge, practice, skills and challenges
(Geoderma, 2022) Charzynski, Przemysław; Urbanska, Magdalena; Capra, Gian Franco; Ganga, Antonio; Mugagga, Frank; Vezzani, Fabiane; Zhang, Shugang
The pivotal role of soil as a resource is not fully appreciated by the general public. Improving education in soil science represents a challenge in a world where soil resources are under serious threat. Today’s high school students, the world’s future landowners, agriculturalists, and decision makers, have the potential to change society’s apathy towards soils issues. This research aimed to compare the level of soil education in high and/or secondary schools in forty-three countries worldwide, together comprising 62% of the world’s population. Comparisons were made between soil science content discussed in educationally appropriate textbooks via a newly proposed soil information coefficient (SIC). Interviews with teachers were undertaken to better understand how soil science education is implemented in the classroom. Statistical analyses were investigated using clustering. Results showed that gaps in soil science education were most commonly observed in countries where soil science is a non-compulsory or optional subject. Soil science concepts are predominantly a part of geography or environmental science curricula. Consequently, considerable variability in soil science education systems among investigated countries exists. Soil information coefficient‘s outcomes demonstrated that a methodological approach combining textbooks and the use of modern digitally based strategies in the educational process significantly improved soil education performances. Overall, soil science education is under-represented in schools worldwide. Dynamic new approaches are needed to improve pivotal issues such as: i) promoting collaborations and agreements between high school and universities; ii) encouraging workshops and practical exercises such as field activities; and, iii) implementing technology tools. This, in turn, will prepare the next generation to contribute meaningfully towards solving present and future soil problems.
A Google Earth-GIS based approach to examine the potential of the current rainwater harvesting practices to meet water demands in Mityana district, Uganda
(PLOS Water, 2022) Nanteza, Jamiat; Thomas, Brian; Kisembe, Jesse; Nakabugo, Rhoda; Mukwaya, Paul Isolo; Rodell, Mathew
Rainwater harvesting (RWH) has become an integral part of global efforts to improve water access. Despite the increasing adoption of RWH in Uganda, there remains a significant knowledge gap in the assessment of RWH systems to meet water demands. In this study, a simplified methodology to estimate rainwater harvesting potential (RWHP) as a function of mean seasonal rainfall and rooftop area, generated using Google Earth and GIS tools is applied. Desired tank storage (DTS) capacities based on user population, demand and dry period lengths, were compared with RWHP to assess whether rooftop areas and tank storage can sustainably supply water for use during the March—May (MAM) and September-November (SON) 90-day dry periods, for three demand levels (i.e. for drinking and cooking (15 litres per capita per day (l/c/d)); for drinking, cooking and hand washing (20 l/c/d); and for drinking, cooking, hand washing, bathing and laundry (50 l/c/d)). Our findings document minimum catchment areas of 60m2 to have rainwater harvesting potential that can sustain households for 90-day dry periods for all three demand levels. However, considering their storage capacities, 25%, 48% and 97% of the existing RWHTs (with storage capacities below 8,000, 10,000 and 20,000 litres respectively) are unable to meet the demand of 15 l/c/d, 20 l/c/d and 50 l/c/d respectively for a 90-day dry period. The results document that the existing storage systems are under-sized for estimated water use under 50 l/c/d demand scenarios. Costs of between 2,000,000–4,500,000 Ugandan shillings (~ 600–1, 250 USD) would be needed to increase existing tank capacities to meet the 50 l/c/d demands for a 90-day dry period. These findings document onerous financial costs to achieve rainwater harvesting potential, meaning that households in Mityana district may have to resort to other sources of water during times of shortage.
A Hominoid Genus from the Early Miocene of Uganda
(Reports, 1997) Gebo, Daniel L.; MacLatchy, Laura; Kityo, Robert; Deino, Alan; Kingston, John; Pilbeam, David
Fossils from a large-bodied hominoid from early Miocene sediments of Uganda, along with material recovered in the 1960s, show features of the shoulder and vertebral column that are significantly similar to those of living apes and humans. The large-bodied hominoid from Uganda dates to at least 20.6 million years ago and thus represents the oldest known hominoid sharing these derived characters with living apes and humans
A mathematical model for the dynamics of malaria in a human host and mosquito vector with temporary immunity
(Elsevier Ltd, 2007) Luboobi, S .Livingstone
In the paper, we propose a model that tracks the dynamics of malaria in the human host and mosquito vector. Our model incorporates some infected humans that recover from infection and immune humans after loss of immunity to the disease to join the susceptible class again. All the new borne are susceptible to the infection and there is no vertical transmission. The stability of the system is analyzed for the existence of the disease-free and endemic equilibria points. We established that the disease-free equilibrium point is globally asymptotically stable when the reproduction number, and the disease always dies out. For the disease-free equilibrium becomes unstable and the endemic equilibrium is globally asymptotically stable. Thus, due to new births and immunity loss to malaria, the susceptible class will always be refilled and the disease becomes more endemic.
A meta-analysis of urban and peri-urban agriculture and forestry in mediating climate change
(Current Opinion in Environmental Sustainability, 2015) Lwasa, Shuaib; Mugagga, Frank; Wahab, Bolanle; Simon, David; Connors, John P.; Griffith, Corrie
This paper systematically reviews literature on urban and peri-urban agriculture and forestry (UPAF) in mediating climate change. The study includes both peer-reviewed and grey literature (274 literature sources), and synthesizes evidence and agreement on both UPAF’s potential and limitations for mitigating and adapting to climate change. Eight East and West African cities were included in the review: Accra, Addis Ababa, Dakar, Dar es Salaam, Douala, Kampala, Ibadan and Nairobi. The review focuses on urban livelihoods, ecosystem services and urban policy responses as pathways to mediating climate change. Literature on UPAF indicates emerging consensus on the potential of UPAF in adaptation, but less agreement with respect to mitigation of climate change. African cities are implementing several measures including UPAF to address issues of development, reduce inequality and move towards low emissions development strategies. This calls for integrated urban development that supports green growth to harness economic opportunities with social and environmental benefits. The review reveals that through UPAF, the potential for mitigation and adaptation of climate change can address some development deficit issues and transform institutions at the city-regional level by leveraging good UPAF practices.
A Nationwide Assessment of the Biodiversity Value of Uganda’s Important Bird Areas Network
(Conservation Biology, 2006) Tushabe, Herbert; Kalema, James; Byaruhanga, Achilles; Asasira, Josephine; Ssegawa, Paul; Balmford, Andrew; Davenport, Tim; Fjeldsa, Jon; Friis, Ib; Pain, Deborah; Pomeroy, Derek; Williams, Paul; Williams, Charles
BirdLife International’s Important Bird Areas (IBA) program is the most developed global system for identifying sites of conservation priority. There have been few assessments, however, of the conservation value of IBAs for nonavian taxa.We combined past data with extensive new survey results for Uganda’s IBAs in the most comprehensive assessment to date of the wider biodiversity value of a tropical country’s IBA network. The combined data set included more than 35,000 site × species records for birds, butterflies, and woody plants at 86 Ugandan sites (23,400 km2), including 29 of the country’s 30 IBAs, with data on additional taxa for many sites. Uganda’s IBAs contained at least 70% of the country’s butterfly and woody plant species, 86% of its dragonflies and 97% of its birds. They also included 21 of Uganda’s 22 major vegetation types. For butterflies, dragonflies, and some families of plants assessed, species of high conservation concern were well represented (less so for the latter). The IBAs successfully represented wider biodiversity largely because many have distinctive avifaunas and, as shown by high cross-taxon congruence in complementarity, such sites tended to be distinctive for other groups too. Cross-taxon congruence in overall species richness was weaker and mainly associated with differences in site size. When compared with alternative sets of sites selected using complementarity-based, area-based, or random site-selection algorithms, the IBA network was efficient in terms of the number of sites required to represent species but inefficient in terms of total area. This was mainly because IBA selection considers factors other than area, however, which probably improves both the cost-effectiveness of the network and the persistence of represented species.
A New Lorisid Humerus from the Early Miocene of Uganda
(Primates, 1997) Gebo, Daniel L.; Maclatchy, Laura; Kityo, Robert
An early Miocene (18-20 mya) distal humerus from Napak, Uganda, is the only element of the forelimb to be allocated to African Lorisinae. Its loris-like features distinguish it from other East African material that more closely resembles galagids. Tracing the evolution of the lorisoid body has been a difficult task due to the lack of good fossil material. Here, we add a single specimen to this poor record. This humerus helps to document the beginning of extant lorisid locomotor specialization and function.
A New Method for Post-introduction Risk Assessment of Biological Invasions Among Introduced Shrubs in Developing Countries
(Environmental management, 2016) Seburanga, J. L.; Bizuru, E.; Mwavu, E. N.; Kampungu, K. G.; Gatesire, T.; Kaplin, B. A.
Risk-assessment methods are useful in collecting data that can help decision making to prevent the introduction of new species that have the potential of invading as well as in management of established taxa. Not only the complexity and unaffordability of available preintroduction risk-assessment models make them rarely or inconsistently applied in the least-developed countries, but also there is lack of tools to assess the status of already introduced plant species. In this study, an affordable and rapid method of assessment of invasiveness among introduced plant species was developed and tested in Rwanda. This method defines three invasion stages (potential, effective, and suppressive invaders) and four levels of risk assessment: post-introduction assessment of species inherent invasive potential (Level 1), post-establishment assessment of species capacity of regeneration (Level 2), post-naturalization assessment of species range of occurrence and ability for long-distance dispersal (Level 3), and post-naturalization assessment of species ability to outcompete other plants in the community and transform the landscape (Level 4). A review of invasive species in Rwanda was developed through desk review, examination of herbarium records, and vegetation surveys. This method should be applicable in other countries that lack the means for a more conventional scientific investigation or under any circumstance where a quick and inexpensive assessment is needed. The method could be useful to environmental managers for timely intervention with strategies specific to different stages of invasion (post-introduction, post-establishment, or post-naturalization) and allocate resources accordingly.
A Preliminary Study of the Baboon Prostate Pathophysiology
(The Prostate, 2007) Mubiru, James N.; Hubbard, Gene B.; Dick Jr., Edward J.; Butler, Stephanie D.; Valente, Anthony J.; Troyer, Dean A.; Rogers, Jeffrey
Prostate cancer, benign prostatic hyperplasia, and prostatitis frequently affect men worldwide. At present there are no suitable animal models for these diseases. This study explores the potential use of the baboon as a model for prostatic diseases. METHODS. Prostates of 48 baboons of different ages were studied. Prostate specific antigen (PSA) and alpha-methyl-acyl-CoA racemase (AMACR) were localized in the different lobes of the prostate by Western blotting and immunohistochemistry. PSA in baboon serum was demonstrated by radioimmunoassay and western blotting. BaboonAMACRcDNA was cloned and its expression assayed in baboon tissues. RESULTS. The baboon prostate is anatomically and histologically similar to its human counterpart, with cranial and caudal lobes corresponding to central and peripheral zones of the human prostate. We found lymphocytic infiltration (91%), and sclerosing/atrophic lesions (34%). PSA tissue immunostaining intensity and alpha-methyl-acyl-CoA racemase (AMACR) gene expression levels differed between the cranial and caudal lobes of the prostate. The cloned baboon AMACR cDNA showed 96% homology with its human counterpart. Anti-human AMACR, PSA and basal keratin antibodies stained intracellular and basement membrane structures in the baboon prostate. The sclerosing/atrophic lesions were comparable to their human counterparts. CONCLUSIONS. The similarity of baboon prostate to its human counterpart and the fact that human antibodies (AMACR, PSA, basal keratin) are reactive to baboon prostatic proteins indicates that the baboon is a promising model for human prostatic diseases.
A Rapid Assessment of the Existence (or Survival) of Macro Fauna in Different Land Uses in Kween District of Mount Elgon
(Research Square, 2021) Aggrey, Siya; Kato, Arthur Martin; Egeru, Anthony; Luswata, Kizza Charles
We explored the effect of different land uses on soil macro fauna species richness, abundance and diversity in Mount Elgon areas of Kween District, Uganda. Results Species richness was higher on the subsurface of the different land uses than belowground. A total of 647 individuals of both subsurface and belowground macro fauna were identified from the different land uses. Macro fauna abundance significantly varied across the five different land uses (H=10.1, d.f.=4, p=0.04). The average diversity of the subsurface was higher (0.71) than that belowground (0.20). The highest diversity of macro fauna was found in the intercrop of maize-beans followed by natural vegetation. Maize monocrop had the least abundance and diversity of both surface crawling and belowground macro fauna. This could be due the diversity of food and living environments as mixed cropping introduces landscape heterogeneity that accommodates diverse organisms across different land use systems. This study recommends extended studies on taxonomy, ecology and management of soil macro fauna with detailed inventories on the functional groups across land use/cover types and evaluations of varied agricultural intensification regimes on abundance and diversity of soil above and below ground macro fauna.
A reassessment of the East African ranges of two subspecies of Yellow-fronted Tinkerbird Pogoniulus chrysoconus based on a comparison of plumage, biometrics and song
(African Journals Online (AJOL), 2022) Alexander, N.G. Kirschel; Matteo, Sebastianelli
The distribution of the nominate subspecies of Yellow-fronted Tinkerbird Pogoniulus chrysoconus has long been thought to extend throughout Uganda south into northwestern Tanzania, with extoni replacing it from southwestern Tanzania southwards. But little or no evidence has been available from southern Uganda or western Tanzania to confirm this. We performed fieldwork in Uganda and Tanzania, recording songs, ringing and measuring tinkerbirds and photographing their plumage. Our analyses of plumage, biometrics and bioacoustics reveal that nominate chrysoconus was present in most of Uganda, however, in southern Uganda, near Lake Mburo National Park, it was replaced by extoni, which extends southwards into Tanzania. Our findings suggest that published distribution maps and descriptions will require revisions.

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