More information:

Graz, P. 2008. The woody weed encroachment puzzle: gathering pieces. Ecohydrology, 1(4): 340–348


Description:

The woody weed encroachment puzzle: gathering pieces.

Summary / Notes:

Increases in woody plant densities in savanna grazing lands worldwide have resulted in a decline in the grazing capacity ofrnthese rangelands. At present, the actual cause of the problem is unknown although a vast body of literature deals with variousrnaspects relevant to the issue. It is generally assumed, however, that the changes in the tree : grass ratio are a response to changes in soil-water development brought about by rangeland utilization. These utilization patterns differ from those under which the savanna system evolved. While changes in physiognomy are very prominent, these are generally preceded by changes in grass species assemblage. The development of species composition has been used as an indicator of rangeland condition for many years; the increase or decrease of individual species is considered in this context. Thus far, however, the shift from perennial to annual grasses has not been evaluated for its effect on soil moisture development, and subsequent implications for woody plant establishment and growth. The review presented here consolidates the existing information in order to provide a basis for understanding the woody weed encroachment problem. Keywords: bush encroachment, savanna ecology, model, vegetation composition.

Year: 2008

Type: Journal Article

Download: Graz_2008.pdf (145 kb)

Preview: Preview this file


Top 50 related results:

You may also be interested in the following items which are on a similar or related topic, listed in order of similarity.

Results per page:

Results: 1 to 50 of 50

To FILTER: Use the pale green row to filter the results on this page. Type in text or select from the year list.

Rows matching filter(s): All
What is this row? 
Data titleYearOriginFile typeDownloadkml/kmz
Meyer, J.J.M., Senejoux, F., Heyman, H.M., Meyer, N.L. and Meyer, M.A. 2015. The occurrence of triterpenoids from Euphorbia gummifera inside the fairy circles of Garub in the southern Namibian pro-desert. South African Journal of Botany, 98: 10–15
  » More info & related results
2015 Journal Article
Wagner, T.C., Hane, S., Joubert, D.F. and Fischer, C. 2016. Herbaceous legume encroachment reduces grass productivity and density in arid rangelands. PLoS ONE, 11(11): e0166743
  » More info & related results
2016 Journal Article1.95 mb pdf
Preview
Ward, D. and Ngairorue, B.T. 2000. Are Namibia's grasslands desertifying?. Journal of Range Management, 53: 138-144
  » More info & related results
2000 Journal Article111 kb pdf
Preview
Espach, C., Lubbe, L.G. and Ganzin, N. 2009. Determining grazing capacity in Namibia with the aid of remote sensing. African Journal of Range and Forage Science, Volume 26(3): 133-138
  » More info & related results
2009 Journal Article
Strohbach, B.J. 2000. Vegetation degradation trends in the northern Oshikoto Region: III. The Terminalia prunioides woodlands and Andoni grasslands. Dinteria, 26: 77-92
  » More info & related results
2000Namibia Scientific SocietyJournal Article518 kb pdf
Preview
RAISON. 2011. Vegetation of the Cuvelai-Etosha Basin
  » More info & related results
2011RAISONPoster913 kb pdf
Preview
Todd, S.W. 2006. Gradients in vegetation cover, structure and species richness of Nama-Karoo shrublands in relation to distance from livestock watering points. Journal of Applied Ecology, 43(2): 293-304
  » More info & related results
2006DRFN DLIBJournal Article
Zimmermann, J., Higgins, S.I., Grimm, V., Hoffmann, J. and Linstädter, A. 2010. Grass mortality in semi-arid savanna: The role of fire, competition and self-shading. Perspectives in Plant Ecology, Evolution and Systematics, 12(2010): 1–8
  » More info & related results
2010 Journal Article274 kb pdf
Preview
Domptail, S. 2009. The role of bio- and landscape diversity in farming strategies - the case of the Keetmanshoop commercial farms. 13th Namibian Rangeland Forum - The role of biodiversity in rangeland management and policy, Neudamm Faculty of Agriculture and Natural Resources, Windhoek, Dates: 27-29 October 2009
  » More info & related results
2009 Presentation643 kb pdf
Preview
Strohbach, B.J. and Walters, H.J.A. 2015. An overview of grass species used for thatching in the Zambezi, Kavango East and Kavango West Regions, Namibia. Dinteria, 35: 13-42
  » More info & related results
2015 Journal Article1.3 mb pdf
Preview
Barker, J.F. 1985. The distribution of "Acridoidea" (grass-hoppers) in relation to overgrazing. Botswana Notes and Records, 17: 141-148
  » More info & related results
1985 Journal Article
The Southern African Institute for Environmental Assessment. 2009. Rural Poverty Reduction Programme 9 ACP NAM 012 - Strategic Environmental Assessment of replication of the Project Combating Bush Encroachment for Namibia's Development (CBEND, Contract No RPRP-123022-34). Windhoek, March 2009
  » More info & related results
2009 Report2.54 mb pdf
Preview
Zhang, H. and Sinclair, R. 2015. Namibian fairy circles and epithelial cells share emergent geometric order. Ecological Complexity, 22: 32–35
  » More info & related results
2015 Journal Article
Tarnita, C.E., Bonachela, J.A., Sheffer, E., Guyton, J.A., Coverdale, T.C., Long, R.A. and Pringle, R.M. 2017. A theoretical foundation for multi-scale regular vegetation patterns. Nature, 541: 398–401
  » More info & related results
2017 Journal Article
Harmse, C.J., Kellner, K. and Dreber, N. 2016. Restoring productive rangelands: A comparative assessment of selective and non-selective chemical bush control in a semi-arid Kalahari savanna. Journal of Arid Environments, 135: 39–49
  » More info & related results
2016 Journal Article
Revermann, R., Maiato, F., Gomes, A., Lages, F. and Finckh, M. 2013. Cusseque - Vegetation. In: Oldeland, J., Erb, C., Finckh, M. and Jürgens, N. (eds). Environmental Assessments in the Okavango Region. Biodiversity and Ecology, 5: 59-63
  » More info & related results
2013 Journal Article3.25 mb pdf
Preview
Moleelea, N.M., Ringrose, S., Matheson, W. and Vanderpost, C. 2002. More woody plants? the status of bush encroachment in Botswana's grazing areas. Journal of Environmental Management, 64(1): 3–11
  » More info & related results
2002 Journal Article
Rothauge, A. 2007. Some principles of sustainable rangeland management in Namibia. Agricola, 17: 7-15
  » More info & related results
2007Ministry of Agriculture, Water and ForestryJournal Article669 kb pdf
Preview
Heshmattti, G.A., Facelli, J.M and Conran, J.G. 2002. The piosphere revisited: plant species patterns close to waterpoints in small, fenced paddocks in chenopod shrublands of South Australia. Journal of Arid Environments, 51: 547-560
  » More info & related results
2002DRFN DLIBJournal Article
HilleRisLambers, R., Rietkerk, M., van der Bosch, F., Prins, H.H.T. and de Kroon, H. 2001. Vegetation pattern formation in semi-arid grazing systems. Ecology, 82(1): 50-61
  » More info & related results
2001DRFN DLIBJournal Article
Zeidler, J., Hanrahan, S. and Scholes, M. 2002. Land-use intensity affects range condition in arid to semi-arid Namibia. Journal of Arid Environments, 52(3): 389-403
  » More info & related results
2002DRFN DLIBJournal Article
Jürgens, N., Gotzmann, I.H. and Cowling, R.M. 1999. Remarkable medium-term dynamics of leaf succulent Mesembryanthemaceae shrubs in the winter-rainfall desert of northwestern Namaqualand, South Africa. Plant Ecology, 142(1-2): 87-96
  » More info & related results
1999 Journal Article
Todd, S.W. and Hoffman, M.T. 1999. A fence-line contrast reveals effects of heavy grazing on plant diversity and community composition in Namaqualand, South Africa. Plant Ecology, 142(1-2): 169-178
  » More info & related results
1999 Journal Article
Huntley, B.J. 1982. Southern African Savannas. In: Ecology of Tropical Savannas - Ecological Studies, 42: 101-119
  » More info & related results
1982 Book, Book Section, Booklet
Mudumu National Park - Zambezi Region. Namibia Parks and Wildlife
  » More info & related results
 Book, Book Section, Booklet837 kb pdf
Preview
Bwabwata National Park - Kwando Core Area. Namibia Parks and Wildlife
  » More info & related results
 Book, Book Section, Booklet1.5 mb pdf
Preview
Williams, D., Pettorelli, N., Henschel, J., Cowlishaw, G. and Douglas, C.M.S. 2013. Impact of alien trees on mammal distributions along an ephemeral river in the Namib Desert. African Journal of Ecology. doi: 10.1111/aje.12134
  » More info & related results
2013 Journal Article464 kb pdf
Preview
Graz, F.P. 1996. Management of a Pterocarpus angolensis population under the influence of fire and land use. Master's Thesis, University of Stellenbosch
  » More info & related results
1996 Thesis
von Breitenbach, F. 1968. Long-term plan of forestry development in the Eastern Caprivi Zipfel. Department of Forestry, Indigenous Forest Office, Saasveld, George, Cape Province
  » More info & related results
1968 Report58.7 mb pdf
Preview
Moisel, A. and Moll, E.J. 1981. A Braun-Blanquet Survey of the Vegetation of the Welwitschia Plain. Dinteria, 15: 3-11
  » More info & related results
1981Namibia Scientific SocietyJournal Article695 kb pdf
Preview
Joubert, D.F. 2014. The Dynamics of Bush Thickening by Acacia Mellifera in the Highland Savanna of Namibia. PhD, Faculty of Natural and Agricultural Sciences, Department of Animal, Wildlife and Grassland Sciences (Grassland Science), University of the Free State, Bloemfontein, South Africa
  » More info & related results
2014 Thesis3.28 mb pdf
Preview
van Rooyena, N. and van Rooyen, M.W. 1998. Vegetation of the south-western arid Kalahari: An overview. Transactions of the Royal Society of South Africa, 53(2): 113-140
  » More info & related results
1998 Journal Article
Burke, A. 2013. Managing biodiversity of the Greater Fish River Canyon Landscape - A tool for sustainable land management. EnviroScience and Namplace, Windhoek, 92 pp
  » More info & related results
2013 Book, Book Section, Booklet4.22 mb pdf
Preview
de Villiers, P.A. and Kok, O.B. 1988. Eto-ekologiese aspekte van olifante in die Nasionale Etoshawildtuin. Madoqua, 15(4): 319-338
  » More info & related results
1988 Journal Article9.34 mb pdf
Preview
Dames, R. 2009. Grass fed beef and the controlled fodder flow grazing management strategy, a model for the production of super healthy red meat for the Arid and Semi-Arid regions of Southern Africa. 13th Namibian Rangeland Forum - The role of biodiversity in rangeland management and policy, Neudamm Faculty of Agriculture and Natural Resources, Windhoek, Dates: 27-29 October 2009
  » More info & related results
2009 Presentation3.17 mb pdf
Preview
Barker, J.F. 1982. A preliminary study of the distribution of Acridoidea in relation to overgrazing in Botswana. Botswana Notes and Records, 14: 1-10
  » More info & related results
1982 Journal Article
Dangerfield, J.M., Veenendaal, E.M., Riddoch, B.J. and Black, H. 1992. Termites and land use in south-east Botswana: Variety and abundance of termite surface features. Botswana Notes and Records, 24: 165-179
  » More info & related results
1992 Journal Article
Namibia Nature Foundation. 2016. An assessment of the economics of land degradation related to bush encroachment in Namibia. Final report, 26 February 2016
  » More info & related results
2016 Report1.26 mb pdf
Preview
SAIEA. 2016. Strategic environmental assessment of large-scale bush thinning and value-addition activities in Namibia - Final Report
  » More info & related results
2016 Report4.44 mb docx
Revermann, R. 2016. Analysis of vegetation and plant diversity patterns in the Okavango Basin at different spatial scales: Integration of field based methods, remote sensing information and ecological modelling. PhD Thesis, Faculty of Mathematics, Informatics and Natural Sciences, Department of Biology of the University of Hamburg
  » More info & related results
2016 Thesis18.19 mb pdf
Preview
Schmiedel, U. 2002. The quartz fields of southern Africa - flora, phytogeography, vegetation, and habitat ecology. PhD Thesis, Mathematisch-Naturwissenschaftlichen Fakultät der Universität zu Köln
  » More info & related results
2002 Thesis4.7 mb pdf
Preview
February, E., Shadwell, E., Viljoen, S. and Hattas, D. 2017. Feeding choices and impacts of extralimital giraffe on two keystone tree species in the Kgalagadi National Park. Koedoe, 59(1), a1454
  » More info & related results
2017 Journal Article1.35 mb pdf
Preview
Burke, A. 2017. Biodiversity zoning in the Greater Fish River Canyon Landscape in southern Namibia. Namibian Journal of Environment, 1(A): 60-71
  » More info & related results
2017 Journal Article3.37 mb pdf
Preview
Cunningham, P. and Detering, F. 2017. Determining age, growth rate and regrowth for a few tree species causing bush thickening in north-central Namibia. Namibian Journal of Environment, 1(A): 72-76
  » More info & related results
2017 Journal Article1.75 mb pdf
Preview
Andrews, P., Pringle, H. and Zimmermann, I. 2017. Could critical Australian insights illuminate rangeland management in Namibia? Namibian Journal of Environment, 1(B): 1-6
  » More info & related results
2017 Journal Article1.33 mb pdf
Preview
Mukoya Muhoko, E. 2018. Spatio-Temporal Analysis of Land Cover Change in the Perspective of Modelling Land Uses: a case study in Kavango East, Namibia. MSc Thesis, Namibia University of Science and Technology
  » More info & related results
2018 Thesis1.7 mb pdf
Preview
Muller, M.A.N. 1985. Invasive alien plants in commercial grazing areas, urban areas, diamond areas and Hereroland. In: Brown, C.J., Macdonald, I.A.W. and Brown, S.E. (Editors). Invasive alien organisms in South West Africa/Namibia. National Scientific Programmes Unit: CSIR, SANSP Report 119, 1985, page 1-5
  » More info & related results
1985 Book, Book Section, Booklet426 kb pdf
Preview
Grabovsky, V.I. 2018. A Model of Vegetation Cover in Conditions of Resource Scarcity: Fairy Rings in Namibia. Biology Bulletin Reviews, 8(3): 169–180
  » More info & related results
2018 Journal Article
Uunona, N. 2015. Impacts of fire on grazers and browsers movements at Waterberg plateau park, central Namibia. BSc Thesis, Polytech Nambia
  » More info & related results
2015 Thesis3.64 mb pdf
Preview
Schmiedel, U., Dengler, J., Luther-Mosebach, J., Gröngröft, A., Muche, G., Petersen, A., Strohbach, B.J. and Jürgens, N. 2010. Patterns and dynamics of vascular plant diversity along the BIOTA transects in southern Africa. In: Schmiedel, U. and Jürgens, N. (eds). Biodiversity in southern Africa. Volume 2: Patterns and processes at regional scale, pp 118–135, Klaus Hess Publishers, Göttingen and Windhoek
  » More info & related results
2010 Journal Article3.75 mb pdf
Preview

» Links to useful free software for working with shapefiles, kml and kmz files, pdf files and more.