Search Results - "WITKOWSKI, E.T.F."

Characterising wide spatial variation in population size structure of a keystone African savanna tree by Helm, Chantal V., Witkowski, E.T.F.

“…► Effect of disturbance on tree population structure is not well studied. ► Wide spatial variation in population structure of a keystone African savanna tree…”
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Baobab (Adansonia digitata L.) density, size-class distribution and population trends between four land-use types in northern Venda, South Africa by Venter, Sarah M., Witkowski, E.T.F.

“…Baobabs are important to people's livelihoods as a source of food, fibre and medicine. Baobab products are increasingly being commercialised and exported…”
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Where are the young baobabs? Factors affecting regeneration of Adansonia digitata L. in a communally managed region of southern Africa by Venter, S.M., Witkowski, E.T.F.

“…Large baobabs are prominent in many African savannas, but the apparent lack of young trees suggests that recruitment is limited and possibly episodic. This…”
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Reproductive ecology offers some answers to the pepperbark tree persistence puzzle in the Kruger National Park, South Africa by van den Bosch, Kaylee, Witkowski, E.T.F., Thompson, D.I., Cron, G.V.

“…Warburgia salutaris (pepperbark tree) is an endangered species greatly valued in South Africa for use in traditional medicine. In one of the few remaining W…”
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Do freeze events create a demographic bottleneck for Colophospermum mopane? by Whitecross, M.A., Archibald, S., Witkowski, E.T.F.

“…Frost disturbance is often mentioned in southern African savanna literature, but it is seldom discussed or investigated further. However, it can represent an…”
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Regeneration by coppicing (resprouting) of miombo (African savanna) trees in relation to land use by Luoga, Emmanuel J, Witkowski, E.T.F, Balkwill, Kevin

“…This study compared and contrasted natural regeneration by coppicing of tree species in a forest reserve and more disturbed adjacent public lands in eastern…”
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Thresholds of change in a multi-use conservation landscape of South Africa: historical land-cover, future transformation and consequences for environmental decision-making by COETZER-HANACK, KAERA L., WITKOWSKI, E.T.F., ERASMUS, BAREND F.N.

“…As multi-use conservation landscapes, biosphere reserves (BRs) exemplify the landscape mosaic approach to environmental decision-making. In this study,…”
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Classification of the indigenous forests of Mpumalanga Province, South Africa by Lötter, M.C., Mucina, L., Witkowski, E.T.F.

“…This paper presents a hierarchical system of forest communities of Mpumalanga Province (South Africa) compatible with the existing South African National…”
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Uncovering the cycad taxa ( Encephalartos species) traded for traditional medicine in Johannesburg and Durban, South Africa by Cousins, S.R., Williams, V.L., Witkowski, E.T.F.

“…The bark and stems of Encephalartos species are used for traditional medicine across South Africa, and some species are traded in traditional medicine markets…”
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Reproductive potential and seed fate of Sclerocarya birrea subsp. caffra (marula) in the low altitude savannas of South Africa by Helm, C.V., Scott, S.L., Witkowski, E.T.F.

“…Even though Sclerocarya birrea subsp. caffra (marula) is a well-studied, keystone tree species with high ecological, commercial and cultural value, significant…”
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impact of commercial harvesting on Warburgia salutaris ('pepper-bark tree') in Mpumalanga, South Africa by Botha, J, Witkowski, E.T.F, Shackleton, C.M

“…Commercialisation often increases the difficulty in managing harvested plant populations sustainably. The bark of the popular medicinal species, Warburgia…”
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Sifting through cycads: A guide to identifying the stem fragments of six South African medicinal Encephalartos species by Cousins, S.R., Williams, V.L., Witkowski, E.T.F.

“…Sixty-three percent of the world's cycad taxa are threatened with extinction. In South Africa, 25 of the 38 indigenous species are categorised as Threatened on…”
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Human-modified landscapes: patterns of fine-scale woody vegetation structure in communal savannah rangelands by FISHER, J. T., WITKOWSKI, E.T.F., ERASMUS, B.F.N., VAN AARDT, J., ASNER, G. P., WESSELS, K. J., MATHIEU, R.

“…Despite electrification, over 90% of rural households in certain areas of South Africa continue to depend on fuelwood, and this affects woody vegetation…”
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Conceptualizing the human use of wild edible herbs for conservation in South African communal areas by Dovie, Delali B.K., Shackleton, Charlie M., Witkowski, E.T.F.

“…The importance of wild edible herbaceous species to resource poor households in most rural economies within savannas has been little studied. This is because…”
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Land-cover change in the Kruger to Canyons Biosphere Reserve (1993– 2006): A first step towards creating a conservation plan for the subregion by Coetzer, Kaera L., Erasmus, Barend F.N., Witkowski, E. T.F., Bachoo, Asheer K.

“…This paper is a first step towards a conservation plan for the Kruger to Canyons Biosphere Reserve (K2C) on the South African Central Lowveld, quantifying the…”
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Reproductive ecology of Aloe plicatilis, a fynbos tree aloe endemic to the Cape Winelands, South Africa by Cousins, S.R., Witkowski, E.T.F., Pfab, M.F., Riddles, R.E., Mycock, D.J.

“…While the pollination ecology of many Aloe species is well-documented, knowledge on aloe seed ecology, and hence aloe reproductive ecology in its entirety is…”
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Economics of charcoal production in miombo woodlands of eastern Tanzania: some hidden costs associated with commercialization of the resources by Luoga, E.J, Witkowski, E.T.F, Balkwill, K

“…This paper assigns monetary values to commercial production of charcoal (using traditional earth kilns) in the miombo woodlands surrounding Kitulanghalo Forest…”
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Ethno-ecological evidence for Hydnora abyssinica occurring in Johannesburg and Durban traditional medicine markets by Williams, V.L., Wojtasik, E.M., Witkowski, E.T.F.

“…Large quantities of plants are traded annually in South Africa's traditional medicine or ‘ muthi’ markets. A resource in high demand in the Faraday…”
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The fuelwood crisis in southern Africa - relating fuelwood use to livelihoods in a rural village by Dovie, Delali B.K., Witkowski, E.T.F., Shackleton, Charlie M.

“…The aim of the paper is to examine wood as a source of fuel energy in rural South Africa and factors influencing its usage. The analysis is based on household…”
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African cycad ecology, ethnobotany and conservation: a synthesis by Cousins, S.R, Witkowski, E.T.F

“…Africa hosts a rich assemblage of cycads: 66 Encephalartos species, Stangeria eriopus and Cycas thouarsii. Most Encephalartos and S. eriopus adults appear to…”
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