International Journal of Biodiversity Andconservation
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Understanding the Causes of Bush Encroachment in Africa: the Key to Effective Management of Savanna Grasslands
Tropical Grasslands – Forrajes Tropicales (2013) Volume 1, 215−219 Understanding the causes of bush encroachment in Africa: The key to effective management of savanna grasslands OLAOTSWE E. KGOSIKOMA1 AND KABO MOGOTSI2 1Department of Agricultural Research, Ministry of Agriculture, Gaborone, Botswana. www.moa.gov.bw 2Department of Agricultural Research, Ministry of Agriculture, Francistown, Botswana. www.moa.gov.bw Keywords: Rangeland degradation, fire, indigenous ecological knowledge, livestock grazing, rainfall variability. Abstract The increase in biomass and abundance of woody plant species, often thorny or unpalatable, coupled with the suppres- sion of herbaceous plant cover, is a widely recognized form of rangeland degradation. Bush encroachment therefore has the potential to compromise rural livelihoods in Africa, as many depend on the natural resource base. The causes of bush encroachment are not without debate, but fire, herbivory, nutrient availability and rainfall patterns have been shown to be the key determinants of savanna vegetation structure and composition. In this paper, these determinants are discussed, with particular reference to arid and semi-arid environments of Africa. To improve our current under- standing of causes of bush encroachment, an integrated approach, involving ecological and indigenous knowledge systems, is proposed. Only through our knowledge of causes of bush encroachment, both direct and indirect, can better livelihood adjustments be made, or control measures and restoration of savanna ecosystem functioning be realized. Resumen Una forma ampliamente reconocida de degradación de pasturas es el incremento de la abundancia de especies de plan- tas leñosas, a menudo espinosas y no palatables, y de su biomasa, conjuntamente con la pérdida de plantas herbáceas. En África, la invasión por arbustos puede comprometer el sistema de vida rural ya que muchas personas dependen de los recursos naturales básicos. -
Lamiales Newsletter
LAMIALES NEWSLETTER LAMIALES Issue number 4 February 1996 ISSN 1358-2305 EDITORIAL CONTENTS R.M. Harley & A. Paton Editorial 1 Herbarium, Royal Botanic Gardens, Kew, Richmond, Surrey, TW9 3AE, UK The Lavender Bag 1 Welcome to the fourth Lamiales Universitaria, Coyoacan 04510, Newsletter. As usual, we still Mexico D.F. Mexico. Tel: Lamiaceae research in require articles for inclusion in the +5256224448. Fax: +525616 22 17. Hungary 1 next edition. If you would like to e-mail: [email protected] receive this or future Newsletters and T.P. Ramamoorthy, 412 Heart- Alien Salvia in Ethiopia 3 and are not already on our mailing wood Dr., Austin, TX 78745, USA. list, or wish to contribute an article, They are anxious to hear from any- Pollination ecology of please do not hesitate to contact us. one willing to help organise the con- Labiatae in Mediterranean 4 The editors’ e-mail addresses are: ference or who have ideas for sym- [email protected] or posium content. Studies on the genus Thymus 6 [email protected]. As reported in the last Newsletter the This edition of the Newsletter and Relationships of Subfamily Instituto de Quimica (UNAM, Mexi- the third edition (October 1994) will Pogostemonoideae 8 co City) have agreed to sponsor the shortly be available on the world Controversies over the next Lamiales conference. Due to wide web (http://www.rbgkew.org. Satureja complex 10 the current economic conditions in uk/science/lamiales). Mexico and to allow potential partici- This also gives a summary of what Obituary - Silvia Botta pants to plan ahead, it has been the Lamiales are and some of their de Miconi 11 decided to delay the conference until uses, details of Lamiales research at November 1998. -
Anogeissus Leiocarpus (DC) Guill
Universal Journal of Environmental Research and Technolog y All Rights Reserved Euresian Publication © 2012 eISSN 2249 0256 Available Online at: www.environmentaljournal.org Volume 2, Issue 5: 383-392 Open Access Research Article Phytochemistry and Biological Activities of Extracts from Two Combretaceae Found in Burkina Faso: Anogeissus Leiocarpus (DC) Guill. and Perr . And Combretum Glutinosum Perr. Ex DC SORE Harouna 1* , HILOU Adama 1, SOMBIE Pierre Alexandre Eric Djifaby 1, COMPAORE Moussa 1, MEDA Roland, MILLOGO Jeanne 2 and NACOULMA Odile Germaine 1 1Laboratoire de Biochimie et de Chimie Appliquées (LABIOCA), UFR-SVT, Université de Ouagadougou, 09 BP 848 Ouagadougou 09, Burkina Faso 2Laboratoire de Biologie et Ecologie Végétale, UFR-SVT, Université de Ouagadougou, 09 BP 848 Ouagadougou 09, Burkina Faso *Corresponding Author : [email protected] Abstract: Many studies indicate that Combretaceae species are commonly used in Africa to treat various diseases. Nonetheless, no phytochemical and/or biological activity data are available from species found in Burkina Faso to secure their ethnomedicinal uses. In addition, drugs derived from these species, especially those of the genus Combretum, are sometimes the objects of adulteration by herbalists dealing in large cities of the country.This paper reports the pharmacognostic, phytochemical and biological activity of extracts from two of the most commonly used Combretaceae species found in Burkina Faso: Anogeissus leiocarpus (DC) Guill. and Perr . and Combretum glutinosum Perr. ex DC. Through the method of Ciulei, the characterization of the two drugs was made possible, and it was found that the phenolic compounds and flavonoids are the main active ingredients in the methanol extracts. -
Vascular Plants Diversity and Ethnobotany With
VASCULAR PLANTS DIVERSITY AND ETHNOBOTANY WITH EMPHASIS TO TRADITIONAL MEDICINAL AND WILD EDIBLE PLANTS IN DUGDA DAWA DISTRICT OF BORANA ZONE, OROMIA REGIONAL STATE, ETHIOPIA Mersha Ashagre Eshete Addis Ababa University Addis Ababa, Ethiopia April 2017 VASCULAR PLANTS DIVERSITY AND ETHNOBOTANY WITH EMPHASIS TO TRADITIONAL MEDICINAL AND WILD EDIBLE PLANTS IN DUGDA DAWA DISTRICT OF BORANA ZONE, OROMIA REGIONAL STATE, ETHIOPIA Mersha Ashagre Eshete A Thesis Submitted to The Department of Plant Biology and Biodiversity Management Presented in Fulfillment of the Requirements for the Degree of Doctor of Philosophy (Plant Biology and Biodiversity Management) Addis Ababa University Addis Ababa, Ethiopia April 2017 i ADDIS ABABA UNIVERSITY GRADUATE PROGRAMMES This is to certify that the thesis prepared by Mersha Ashagre Eshete, entitled: “Vascular Plants Diversity and Ethnobotany with Emphasis to Traditional Medicinal and Wild Edible Plants in Dugda Dawa District of Borana Zone, Oromia Regional State, Ethiopia”, and submitted in fulfillment of the requirements for the Degree of Doctor of Philosophy (Plant Biology and Biodiversity Management) complies with the regulations of the University and meets the accepted standards with respect to originality and quality. Signed by Research Supervisors: Name Signature Date 1. _____________________ _________________ _____________ 2.______________________ _________________ _____________ 3._____________________ _________________ ______________ 4.____________________ __________________ _______________ _____________________ -
Response of Wildlife to Bush Thinning on the North Central Freehold Farmlands of Namibia T
Forest Ecology and Management 473 (2020) 118330 Contents lists available at ScienceDirect Forest Ecology and Management journal homepage: www.elsevier.com/locate/foreco Response of wildlife to bush thinning on the north central freehold farmlands of Namibia T Matti T. Nghikembuaa,b,c, Laurie L. Markera,b, Bruce Brewera,b, Lauri Mehtätaloc, Mark Appiahc,d, ⁎ Ari Pappinenc, a Cheetah Conservation Fund, Otjiwarongo, Namibia b CCF Bush PTY Ltd, Otijwarongo, Namibia c University of Eastern Finland, School of Forest Sciences, Joensuu Campus, Yliopistokatu 7, 80101 Joensuu, Finland d Forestry Research Institute of Ghana (CSIR-FORIG), Kumasi, Ghana ARTICLE INFO ABSTRACT Keywords: Agriculture is considered the backbone of the Namibian economy. However, bush encroachment affects ap- Bush encroachment proximately 45 million hectares of Namibian farmland and in the absence of appropriate restoration measures, Biodiversity negatively affects local biodiversity and the national economy. Bush thinning operations on three freehold farms Restoration were assessed to examine the response of local ungulates (small, medium, large) and predators (meso, large). Carrying capacity Camera traps were used to capture wildlife in bush encroached and previously thinned habitats. We hy- Overgrazing pothesized that thinning would increase the activity of small, medium, and large ungulates, meso and large Bush thinning predators, and that the magnitude of the increase in activity at thinned sites would differ among animal types. Our results revealed that the expected animal captures were not equal – small, medium, and large ungulates were common, large predators were least common; thinned areas had more expected animal captures and overall animal-treatment interactions were almost significant (p = 0.051). -
Phytochemical Screening and Antibacterial Activity of Combretum Glutinosum Extract Against Some Human Pathogens
British Journal of Pharmacology and Toxicology 3(5): 233-236, 2012 ISSN: 2044-2459; E-ISSN: 2044-2467 © Maxwell Scientific Organization, 2012 Submitted: June 01, 2012 Accepted: June 23, 2012 Published: October 25, 2012 Phytochemical Screening and Antibacterial Activity of Combretum glutinosum Extract against Some Human Pathogens 1O. Yahaya, 2J.A. Yabefa and 1B. Usman 1Department of Science Laboratory Technology, Federal Polytechnic, Idah, Kogi State, Nigeria 2Department of Chemistry, Collage of Education, Brass-Island, Bayelsa State, Nigeria Abstract: The aim of this study is to determine the antibacterial effects of Combretum glutinosum plant extract on some clinically isolated bacteria species. Combretum glutinosum powdered plant materials was extracted using methanol and sterile distilled water. The Agar diffused methods was used to determine the antimicrobial activity of the plant against Salmonella typhi, Pseudomonas aeruginosa, Staphylococcus aureus and Escherichia coli. The methanolic and water both provide yield from different parts of the plant and both showed effectiveness. Phytochemical screening of the crude extract revealed the presence of tannins, saponins, phenolcs, flavonoids, cardiac glycosides, anthroquinones and alkaloids and the growth of all bacteria were inhibited though to varying degrees thus justifying their use in traditional medicines in treating enteric infection and other diseases across Africa. Keywords: Combretum glutinosum, enteric infections, methanolic extract, phytochemicals INTRODUCTION gonorrhea and typhoid fever while the stem bark of Daniella oliveri was used in the treating fever, boil and The use of plant parts in the treatment of human back ache (Tony, 2005). disease is as old as the disease itself and herbal Combretum glutinosum is a very large genus medicine was the major form of medicine in Nigeria. -
4.0 Ramoelo 20032018.Indd
© University of Hamburg 2018 All rights reserved Klaus Hess Publishers Göttingen & Windhoek www.k-hess-verlag.de ISBN: 978-3-933117-95-3 (Germany), 978-99916-57-43-1 (Namibia) Language editing: Will Simonson (Cambridge), and Proofreading Pal Translation of abstracts to Portuguese: Ana Filipa Guerra Silva Gomes da Piedade Page desing & layout: Marit Arnold, Klaus A. Hess, Ria Henning-Lohmann Cover photographs: front: Thunderstorm approaching a village on the Angolan Central Plateau (Rasmus Revermann) back: Fire in the miombo woodlands, Zambia (David Parduhn) Cover Design: Ria Henning-Lohmann ISSN 1613-9801 Printed in Germany Suggestion for citations: Volume: Revermann, R., Krewenka, K.M., Schmiedel, U., Olwoch, J.M., Helmschrot, J. & Jürgens, N. (eds.) (2018) Climate change and adaptive land management in southern Africa – assessments, changes, challenges, and solutions. Biodiversity & Ecology, 6, Klaus Hess Publishers, Göttingen & Windhoek. Articles (example): Archer, E., Engelbrecht, F., Hänsler, A., Landman, W., Tadross, M. & Helmschrot, J. (2018) Seasonal prediction and regional climate projections for southern Africa. In: Climate change and adaptive land management in southern Africa – assessments, changes, challenges, and solutions (ed. by Revermann, R., Krewenka, K.M., Schmiedel, U., Olwoch, J.M., Helmschrot, J. & Jürgens, N.), pp. 14–21, Biodiversity & Ecology, 6, Klaus Hess Publishers, Göttingen & Windhoek. Corrections brought to our attention will be published at the following location: http://www.biodiversity-plants.de/biodivers_ecol/biodivers_ecol.php Biodiversity & Ecology Journal of the Division Biodiversity, Evolution and Ecology of Plants, Institute for Plant Science and Microbiology, University of Hamburg Volume 6: Climate change and adaptive land management in southern Africa Assessments, changes, challenges, and solutions Edited by Rasmus Revermann1, Kristin M. -
A Review of Potential Methods for Monitoring Rangeland Degradation in Libya Abdulsalam Al-Bukhari1,2, Stephen Hallett1* and Tim Brewer1
Al-bukhari et al. Pastoralism: Research, Policy and Practice (2018) 8:13 Pastoralism: Research, Policy https://doi.org/10.1186/s13570-018-0118-4 and Practice REVIEW Open Access A review of potential methods for monitoring rangeland degradation in Libya Abdulsalam Al-bukhari1,2, Stephen Hallett1* and Tim Brewer1 Abstract Natural and human factors exert a profound impact on the degradation of rangelands, human effects being the most significant factor in increasing the severity of deterioration. This occurs through agricultural expansion at the expense of rangelands, and with the number of domestic and wildlife animals exceeding the natural carrying capacity. This raises concerns about the ongoing sustainability of these land resources, as well as the sustainability of traditional pastoral land practices. Rangelands require effective management, which is dependent upon accurate and timely monitoring data to support the assessment of rangeland deterioration. Natural rangelands provide one of the significant pillars of support for the Libyan national economy. Despite the important role of rangeland in Libya from both economic and environmental perspectives, the vegetation cover of Libyan rangeland has changed adversely qualitatively and quantitatively over the past four decades. Ground-based observation methods are widely used to assess rangeland degradation in Libya. However, multi-temporal observations are often not integrated nor repeatable, making it difficult for rangeland managers to detect degradation consistently. Field study costs are also significantly high in comparison with their accuracy and reliability, both in terms of the time and resources required. Remote-sensing approaches offer the advantage of spanning large geographical areas with multiple spatial, spectral and temporal resolutions. -
Phylogenetic Study of African Combretaceae R. Br. Based on /.../ A
BALTIC FORESTRY PHYLOGENETIC STUDY OF AFRICAN COMBRETACEAE R. BR. BASED ON /.../ A. O. ONEFELY AND A. STANYS ARTICLES Phylogenetic Study of African Combretaceae R. Br. Based on rbcL Sequence ALFRED OSSAI ONEFELI*,1,2 AND VIDMANTAS STANYS2,3 1Department of Forest Production and Products, Faculty of Renewable Natural Resources, University of Ibadan, 200284 Ibadan, Nigeria. 2Erasmus+ Scholar, Institute of Agricultural and Food Science Vytautas Magnus University, Agricultural Aca- demy, Akademija, LT-53361 Kaunas district, Lithuania. 3Department of Orchard Plant Genetics and Biotechnology, Lithuanian Research Centre for Agriculture and Forestry, Babtai, LT-54333 Kaunas district, Lithuania. *Corresponding author: [email protected], [email protected] Phone number: +37062129627 Onefeli, A. O. and Stanys, A. 2019. Phylogenetic Study of African Combretaceae R. Br. Based on rbcL Se- quence. Baltic Forestry 25(2): 170177. Abstract Combretaceae R. Br. is an angiosperm family of high economic value. However, there is dearth of information on the phylogenetic relationship of the members of this family using ribulose biphosphate carboxylase (rbcL) gene. Previous studies with electrophoretic-based and morphological markers revealed that this family is phylogenetically complex. In the present study, 79 sequences of rbcL were used to study the phylogenetic relationship among the members of Combretaceae of African origin with a view to provide more information required for the utilization and management of this family. Multiple Sequence alignment was executed using the MUSCLE component of Molecular Evolutionary Genetics Version X Analysis (MEGA X). Transition/Transversion ratio, Consistency index, Retention Index and Composite Index were also determined. Phylogenetic trees were constructed using Maximum parsimony (MP) and Neighbor joining methods. -
Tanzanian Rangelands in a Changing Climate: Impacts, Adaptations and Mitigation
Net Journal of Agricultural Science Vol. 2(1), pp. 1-10, January 2014 ISSN: 2315-9766 Review Tanzanian rangelands in a changing climate: Impacts, adaptations and mitigation Sangeda A. Z.1* and Malole J. L.2 1Department of Animal Science and Production, Sokoine University of Agriculture, P.O. Box 3004, Morogoro, Tanzania. 2Sokoine University of Agriculture, P.O Box 3007, Morogoro, Tanzania. Accepted 12 December, 2013 ABSTRACT Livestock are central to the livelihoods of Tanzanians who rely on them for income via sales of milk, meat, skins and draught power. Owning livestock is amongst the ways in which many Tanzanians could diversify their risks, increase assets and improve their resilience to changes in climate. Though local coping strategies can deal with shocks in the short-term, they are hardly able to cope with more frequent and severe climate events. Observably, temperature, rainfall and atmospheric CO2 concentration interact with grazing and land cover change to influence rangeland quality and composition. Increased temperature increases drought stress and tissue lignifications in plants and, consequently, affects their digestibility and decomposition rate. Increased temperature and lower rainfall also increases vegetation flammability resulting in a shift in species composition due to increased fire frequency. Literature indicates that, Tanzania rangelands receiving between 400 and 1000 mm of rain per year (e.g. Kongwa, Monduli, Kiteto, Simanjiro, Ngorongoro, Babati, Hanang, Mbulu and Karatu) have greatest impact on climate change on surface drainage. A 10% drop in rainfall of 1000 mm per year in a rangeland results in a decline in surface drainage of only 17%, while in areas of 500 mm per year will result in a 50% decline. -
Chapter 3. Brush Management As a Rangeland Conservation Strategy
CHAPTER 3 Brush Management as a Rangeland Conservation Strategy: A Critical Evaluation Steven R. Archer,1 Kirk W. Davies,2 Timothy E. Fulbright, 3 Kirk C. McDaniel,4 Bradford P. Wilcox,5 and Katharine I. Predick6 Authors are 1Professor, School of Natural Resources and the Environment, University of Arizona, Tucson, AZ 85721-0043, USA; 2Rangeland Scientist, USDA, Agricultural Research Service, Eastern Oregon Agricultural Research Center, Burns, OR 97720, USA; 3Regent's Professor and Meadows Professor in Semiarid Land Ecology, Caesar Kleberg Wildlife Research Institute, Texas A&M University–Kingsville, Kingsville, TX 78363, USA; 4Professor, Animal and Range Science, New Mexico State University, Las Cruces, NM 88003, USA; 5Professor , Ecosystem Science and Management, Texas A&M University, College Station, TX 77843-2126, USA; and 6Senior Research Specialist, School of Natural Resources and the Environment, University of Arizona, Tucson, AZ 85721-0043, USA Reference to any commercial product or service is made with the understanding that no discrimination is intended and no endorsement by USDA is implied 105 Woody plant encroachment “represents a threat to grassland, shrub- steppe, and savanna ecosystems and the plants and animals endemic to them… ” 106 Conservation Benefits of Rangeland Practices Brush Management as a Rangeland Conservation Strategy: A Critical Evaluation 3 Steven R. Archer, Kirk W. Davies, Timothy E. Fulbright, Kirk C. McDaniel, Bradford P. Wilcox, and Katharine I. Predick IntRoduCtIon et al. 2009). In semiarid and subhumid areas, encroachment of shrubs and trees Rangelands support the majority of the world’s into grasslands and savannas may have livestock production (Safriel and Adeel 2005) neutral to substantially positive effects on and play an important role in human health primary production, nutrient cycling, and and global carbon, water, and nitrogen cycles accumulation of soil organic matter (Archer (Campbell and Stafford Smith 2000). -
Lamiales – Synoptical Classification Vers
Lamiales – Synoptical classification vers. 2.6.2 (in prog.) Updated: 12 April, 2016 A Synoptical Classification of the Lamiales Version 2.6.2 (This is a working document) Compiled by Richard Olmstead With the help of: D. Albach, P. Beardsley, D. Bedigian, B. Bremer, P. Cantino, J. Chau, J. L. Clark, B. Drew, P. Garnock- Jones, S. Grose (Heydler), R. Harley, H.-D. Ihlenfeldt, B. Li, L. Lohmann, S. Mathews, L. McDade, K. Müller, E. Norman, N. O’Leary, B. Oxelman, J. Reveal, R. Scotland, J. Smith, D. Tank, E. Tripp, S. Wagstaff, E. Wallander, A. Weber, A. Wolfe, A. Wortley, N. Young, M. Zjhra, and many others [estimated 25 families, 1041 genera, and ca. 21,878 species in Lamiales] The goal of this project is to produce a working infraordinal classification of the Lamiales to genus with information on distribution and species richness. All recognized taxa will be clades; adherence to Linnaean ranks is optional. Synonymy is very incomplete (comprehensive synonymy is not a goal of the project, but could be incorporated). Although I anticipate producing a publishable version of this classification at a future date, my near- term goal is to produce a web-accessible version, which will be available to the public and which will be updated regularly through input from systematists familiar with taxa within the Lamiales. For further information on the project and to provide information for future versions, please contact R. Olmstead via email at [email protected], or by regular mail at: Department of Biology, Box 355325, University of Washington, Seattle WA 98195, USA.