Jeremy Perkins

Jeremy Perkins
University of Botswana | UB · Department of Environmental Science

About

39
Publications
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Introduction
Skills and Expertise

Publications

Publications (39)
Chapter
ZoogeomorphologyZoogeomorphology is a relatively new discipline and is set for changes this century in BotswanaBotswana that have not been seen for millennia. The co-evolution of landscapes and wildlife amidst a changing climate means that the precise role of each is difficult to determine. As southern Africa becomes hotter and drier due to anthrop...
Chapter
Botswana’sBotswanadamsDam and the sandSandriversRiver that run through them appear set for unprecedented levels of threat and uncertainty due to climate change this Century. Spatially specific impactsImpact such as severe soilSoilerosionErosion, sand miningMining, industrial and agriculturalAgriculturalpollutionPollution, invasiveInvasive and alien...
Article
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Across much of southern Africa’s savanna wildernesses, wildfires burn unchecked. This is particularly true in the woodland savannas of northern Botswana, where wildfires originate outside of management activities, and are left to burn uncontrolled, because of limited resources and remoteness. There is concern that severe annual wildfires are result...
Article
Full-text available
Browse species as complete feed for ruminants is uncommon. This may be due to low dry matter (DM) and high condensed tannins (CT) contents limiting its potential to influence weight gain. Drying however improves DM content and reduces CT levels and its astringency. The objective of this study was to determine chemical composition, in vitro paramete...
Chapter
This chapter looks at the impact artificial water provision has had upon the sustainable management of both livestock and wildlife populations in the semi-arid savannahs of Botswana. It takes a holistic cross sectoral view as to the role boreholes have historically played in livestock and wildlife management and how their use needs to be adapted to...
Article
Full-text available
Condensed tannins are useful at certain concentrations but high levels are antinutritional. Drying has been shown to reduce the condensed tannin content in forages. The objective of this study was to determine the influence of six drying methods on the chemical composition and condensed tannin content of four browse leaves in the wet and dry season...
Article
Full-text available
Ruminants are major contributors to methane production in the atmosphere. Methane production is a result of digestion inefficiencies but diet composition can be manipulated to reduce methane output. This study evaluated the productive efficiency and methane emission of sheep fed dried browse leaves. Sixteen forest type ram lambs with an average wei...
Article
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This paper brings together a wide range of concepts from climate change predictions, palaeoecology, wildlife ecology and sustainable livelihoods in order to prioritise adaptive management measures that are necessary for the conservation of the African megafauna. Climate change predictions emphasise the severe aridity that will surge into southern A...
Article
As in other semi-arid savannah systems of the world characterised by highly mobile and/or migratory ungulates, Botswana's rangelands are experiencing increased fragmentation due to expanding human activities and increasing human wildlife conflict. Climate change scenarios show Botswana becoming hotter and drier with mega droughts, heat waves and mo...
Poster
Full-text available
Browse species contains condensed tannins and saponins which have been reported to reduce enteric methane. Feeding of dried browse species has the potential to reduce methane production and also improve weight gain. This is desirable because some attempts by use of pasture supplemented with grain and nitrates to reduce methane production has result...
Poster
Full-text available
The drying of the browse species may improve the dry matter content, reduce condensed tannins levels and astringency enhancing the potential of the browse species to be used as a sole diet. The drying also present opportunities to conserve these browse species and use them in unfavourable climatic conditions and promoting intensive system of keepin...
Article
Vegetation data collected around eight piospheres in the southern Kalahari of Botswana shows livestock impacts on vegetation cover and composition to be of limited spatial extent around the watering point. Dune crests can become active up to a distance of 1.2 kms from the borehole with the latter sitting within an area of bare ground and a spectacu...
Article
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Agrochemicals are widely used across the world to serve different purposes. However, inappropriate use of agrochemicals affects wildlife particularly non-target species such as vultures. In this paper, we discuss the potential threats posed by inappropriate use of agrochemicals to vultures in Botswana. We discuss the ecosystem services provided by...
Article
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Dual-scale analyses assessing farm-scale patterns of ecological change and landscape-scale patterns of change in vegetation cover and animal distribution are presented from ecological transect studies away from waterpoints, regional remotely sensed analysis of vegetation cover and animal numbers across the southern Kalahari, Botswana. Bush encroach...
Article
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Land degradation undermines ecosystem service provision, limiting economic returns from semi-arid rangelands. We apply a Multi- Criteria Decision Analysis (MCDA) to assess the value of ecosystem services, using monetary and non-monetary techniques in semi-arid rangelands in Kgalagadi District, southern Botswana. In doing so, we provide an empirical...
Article
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This paper identifies new ways of moving from land degradation towards sustainable land management through the development of economic mechanisms. It identifies new mechanisms to tackle land degradation based on retaining critical levels of natural capital whilst basing livelihoods on a wider range of ecosystem services. This is achieved through a...
Article
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An approach to derive relationships for defining land degradation and desertification risk and developing appropriate tools for assessing the effectiveness of the various land management practices using indicators is presented in the present paper. In order to investigate which indicators are most effective in assessing the level of desertification...
Article
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Indicator-based approaches are often used to monitor land degradation and desertification from the global to the very local scale. However, there is still little agreement on which indicators may best reflect both status and trends of these phenomena. In this study, various processes of land degradation and desertification have been analyzed in 17...
Article
The aim of this paper is to discuss the role of existing policies, programmes and legislation in promoting sustainable land management and livelihoods in mid-central Botswana. The paper is based on data from the survey of relevant literature, analysis of policy and legal documents, field observations, and a series of stakeholder workshops held in t...
Article
It is increasingly recognised that tackling land degradation through more sustainable land management depends on incorporating multiple perspectives by using a variety of methods at multiple scales, including the perspectives of those who manage and/or use the land. This paper reports experience implementing a previously proposed methodological fra...
Article
For land degradation monitoring and assessment (M&A) to be accurate and for sustainable land management (SLM) to be effective, it is necessary to incorporate multiple knowledges using a variety of methods and scales, and this must include the (potentially conflicting) perspectives of those who use the land. This paper presents a hybrid methodologic...
Article
Full-text available
The aim of this study was to analyze the depletion of soil nutrients with time on abandoned kraals in a peri-urban area of Botswana. Active kraals are enriched with nutrients through the accumulation of animal droppings and this study was aimed at assessing how long the impact of this soil nutrient enrichment persists after kraal abandonment. A tot...
Article
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The goal of this study was to gather information on indigenous technical knowledge and its application in the utilization of veld products and wildlife by two communities in the southern Kalahari. The region in south western Botswana is semi-arid, and prone to droughts and range degradation, with rural livelihoods in general characterized by a dist...
Article
Full-text available
Vegetation was assessed in plots sited at varying distances along two line transects radiating from each of nine artificial water points. Environmental variables such as distance from water point, soil type and ground cover were related to grass species composition. Grass species composition in calcrete soils differed significantly from that found...
Article
This paper examines the ways in which a policy aiming to improve both use of an extensive dryland natural resource, and the well-being of rural peoples in Botswana, has impacted on the environment and upon indigenous land-use activities. The impacts of the Tribal Grazing Land Policy (TGLP) have been spatially and temporally variable. Previous asser...
Article
This paper examines the ways in which a policy aiming to improve both use of an extensive dryland natural resource, and the well-being of rural peoples in Botswana, has impacted on the environment and upon indigenous land-use activities. The impacts of the Tribal Grazing Land Policy (TGLP) have been spatially and temporally variable. Previous asser...
Article
Fifteen environmental variables, among them cattle density (hereafter ‘pressure index’), were measured along grazing gradients of eight boreholes at Olifants Drift in south-eastern Botswana. The aim was to investigate whether cattle density, among other variables, had any direct relationship with the occurrence of bush-encroaching woody plant speci...
Article
Full-text available
Previous studies suggested an influence of human settlements on the distribution patterns of some less migratory wildlife species in the Kalahari ecosystem. This study addresses two alternative hypotheses to explain the observed patterns: habitat change caused by livestock grazing, and wildlife utilization. Relationships between selected common and...
Article
This paper examines the advantages of the traditional cattlepost system against the recent drive towards the fencing of Botswana's rangelands and the establishment of privatised, commercial beef ranches. Consideration of operational and environmental factors emphasise the benefits of the cattlepost system, while socio-economic and political factors...
Article
Length, branch production, orientation, spinescence and biomass were measured for current shoots of Acacia tortilis shrubs in a range of habitats in Botswana. All shoot characteristics varied between individuals and between habitats with longer, less spinescent shoots produced in the habitat recently protected from wildlife. Biomass allocated to wo...
Article
The Kalahari Desert of Botswana is being increasingly used for livestock production, particularly through the establishment of ranches dependent on borehole water supplies. Reports of the environmental impacts of land use practices in such drylands are conflicting, with livestock systems supplied by boreholes and wells being regarded in some studie...

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