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List of works by Edward Witkowski

A Framework for Exploring the Determinants of Savanna and Grassland Distribution

A Review of Recent Efforts at Biological Control ofCaesalpinia decapetala(Roth) Alston (Fabaceae) in South Africa

article

A comparison of anthropogenic and elephant disturbance on Acacia xanthophloea (fever tree) populations in the Lowveld, South Africa ⬇️

scientific article published on 14 December 2002

A landscape ecological approach to address scaling problems in conservation management and monitoring

scientific article published in September 2001

A review of Solanum mauritianum biocontrol: prospects, promise and problems: a way forward for South Africa and globally

A simple population viability analysis of the Critically Endangered Euphorbia clivicola R.A. Dyer under four management scenarios

article by M.F Pfab et al published December 2000 in Biological Conservation

A test for lottery recruitment among four Banksia species based on their demography and biological attributes

scientific article published on March 1995

A villainous hero: Does the biological control agent, Anthonomus santacruzi, pollinate its target weed, Solanum mauritianum?

Aerosol capture by small trees in savannas marginal to treeless grassland in South Africa

article

African Cycad Ecology, Ethnobotany and Conservation: A Synthesis

African aloe ecology: A review

article

Aiming for the biodiversity target with the social welfare arrow: medicinal and other useful plants from a Critically Endangered grassland ecosystem in Limpopo Province, South Africa

article

Altered growth, population structure and realised niche of the weed Campuloclinium macrocephalum (Asteraceae) after exposure to the naturalised rust Puccinia eupatorii (Pucciniaceae)

An inventory of medicinal plants traded on the western boundary of the Kruger National Park, South Africa ⬇️

scientific article published on 30 August 2001

Application of Diversity Indices to Appraise Plant Availability in the Traditional Medicinal Markets of Johannesburg, South Africa

article

Arbuscular mycorrhiza status of gold and uranium tailings and surrounding soils of South Africa's deep level gold mines. II. Infectivity

scholarly article by C.J. Straker et al published April 2008 in South African Journal of Botany

Arbuscular mycorrhiza status of gold and uranium tailings and surrounding soils of South Africa's deep level gold mines: I. Root colonization and spore levels

scholarly article by C.J. Straker et al published April 2007 in South African Journal of Botany

Are environmental factors important facilitators of pompom weed (Campuloclinium macrocephalum) invasion in South African rangelands?

Assessing the frequency and drivers of early-greening in broad-leaved woodlands along a latitudinal gradient in southern Africa

article

Baobab (Adansonia digitata L.) density, size-class distribution and population trends between four land-use types in northern Venda, South Africa

article

Baobab (Adansonia digitata L.) fruit production in communal and conservation land-use types in Southern Africa

article

Baobabs ( Adansonia digitata L.) are self-incompatible and ‘male’ trees can produce fruit if hand-pollinated

article published in 2017

Beating the blaze: Fire survival in the fan aloe (K umara plicatilis ), a succulent monocotyledonous tree endemic to the Cape fynbos, South Africa

article

Biomass Increases Go under Cover: Woody Vegetation Dynamics in South African Rangelands

scientific article

Biomass increases go under cover: Woody vegetation dynamics in a communally utilised semi-arid savanna in Bushbuckridge, South Africa

scientific article published on 10 April 2015

Boundary of treeless grassland in relation to nutrient content of soils on the Highveld of South Africa

scholarly article

Bridging the knowing–doing gap in South Africa and the role of environmental volunteer groups

article

Changes in density, biomass, seed production and soil seed banks of the non-native invasive plant, Chromolaena odorata, along a 15 year chronosequence

scientific article published in 2001

Characterising wide spatial variation in population size structure of a keystone African savanna tree

scientific article published in 2012

Classification of the indigenous forests of Mpumalanga Province, South Africa

article

Climate-induced change of environmentally defined floristic domains: A conservation based vulnerability framework

article

Commercial viability of conservation and social forestry outreach nurseries in South Africa

article

Comparative ethnoentomology of edible stinkbugs in southern Africa and sustainable management considerations.

scientific article published on 25 March 2013

Comparative resprouting response of Savanna woody plant species following harvesting: the value of persistence

article

Conceptualizing the human use of wild edible herbs for conservation in South African communal areas.

scientific article

Conservation biology of banksias: insights from natural history to simulation modelling

article

Conservation biology of the succulent shrub, Euphorbia barnardii, a serpentine endemic of the Northern Province, South Africa

scientific article published in 2000

Conservation requirements of an exploited wildflower: modelling the effects of plant age, growing conditions and harvesting intensity

article

Continuing decline of a keystone tree species in the Kruger National Park, South Africa

article

Contrasting termite diversity and assemblages on granitic and basaltic African savanna landscapes

scientific article

Convergence and non-convergence of plant traits in climatically and edaphically matched sites in Mediterranean Australia and South Africa

article

Correction to: Differences between sun and shade habitats on the invasive shrub Lantana camara and its biocontrol agent Teleonemia scrupulosa

scientific article

Crunchtime: sub-Saharan stinkbugs, a dry season delicacy and cash cow for impoverished rural communities

Density and potential utilisation of medicinal grassland plants from Abe Bailey Nature Reserve, South Africa

article published in 2001

Description of the mature larva and pupa of Anthonomus santacruzi Hustache (Coleoptera, Curculionidae), a biological control agent of Solanum mauritianum Scop. (Solanaceae), and remarks about its biology

scientific article published on 21 July 2017

Differences between sun and shade habitats on the invasive shrub Lantana camara and its biocontrol agent Teleonemia scrupulosa

scientific article

Direct use values of communal resources in Bokong and Tsehlanyane in Lesotho: whither the commons?

scientific article published in 2002

Direct-use value of smallholder crop production in a semi-arid rural South African village

article

Disproportionate allocation of mineral nutrients and carbon between vegetative and reproductive structures in Banksia hookeriana

scientific article published in January 1996

Do freeze events create a demographic bottleneck for Colophospermum mopane?

scientific article published in 2012

Do large termite mounds effect woody plant phylogenetic diversity and endemism across African savannas?

scientific article published on 18 March 2022

Does allelopathy explain the invasiveness of Campuloclinium macrocephalum (pompom weed) in the South African grassland biome?

Does climate constrain the spread of Anthonomus s antacruzi , a biological control agent of Solanum mauritianum , in South Africa?

Does host plant quality constrain the performance of the Parthenium beetle Zygogramma bicolorata?

scientific article published on 22 August 2019

Ecological classification and mapping for landscape management and science

Economics of charcoal production in miombo woodlands of eastern Tanzania: some hidden costs associated with commercialization of the resources

article

Effect of temperature on seed production in the invasive grass Glyceria maxima (Hartm.) Holmb. (Poaceae) in South Africa

Effects of Carbofuran on <i>Lantana camara</i> and its biocontrol agent, <i>Teleonemia scrupulosa</i>

scientific article published on 25 March 2019

Effects of Invasive Alien Acacias on Nutrient Cycling in the Coastal Lowlands of the Cape Fynbos

scientific article published in 1991

Effects of nutrient additions on litter production and nutrient return in a nutrient-poor Cape fynbos ecosystem

article

Effects of nutrients on the distribution of dry mass, nitrogen and phosphorus in seedlings of Protea repens (L.) L. (Proteaceae)

scientific article published on 01 August 1989

Elucidating patterns in the population size structure and density of Aloe plicatilis, a tree aloe endemic to the Cape fynbos, South Africa

article

Erratum to “Classification of the indigenous forests of Mpumalanga Province, South Africa” [South African Journal of Botany 90 (2014) 37–51]

article

Ethno-ecological evidence for Hydnora abyssinica occurring in Johannesburg and Durban traditional medicine markets

article

Evaluating the Ecological Relevance of Habitat Maps for Wild Herbivores

scientific article published in 2002

Evidence for climate-induced range shift in Brachystegia (miombo) woodland

article

Exacerbation of photosynthetic damage through increased heat–light stress resulting from Gargaphia decoris sap-feeding

scholarly article by Blair W. Cowie et al published March 2016 in Biological Control

Factors influencing prices of medicinal plants traded in the Lowveld, South Africa

article

Feasible or foolish: Attempting restoration of a Parthenium hysterophorus invaded savanna using perennial grass seed

scientific article published on 26 November 2020

Fire as a Selective Agent for both Serotiny and Nonserotiny Over Space and Time

scientific article published on 09 June 2020

Fire survival of the Critically Endangered succulent, Euphorbia clivicola R.A. Dyer - fire-avoider or fire-tolerant?

scientific article published in 1999

Floristic composition in relation to environmental gradients across KwaZulu-Natal, South Africa

article

From fragments to figures: Estimating the number of Encephalartos stems in a muthi market

article

Fruits of our labour: contribution of commercial baobab (Adansonia digitata L.) fruit harvesting to the livelihoods of marginalized people in northern Venda, South Africa

article

Functional and species composition of understory plants varies with mistletoe-infection on Vachellia karroo trees in a semi-arid African savanna

scientific article published on 29 October 2021

Geology drives the spatial patterning and structure of termite mounds in an African savanna

scientific article

Growing on rocky ground: Microhabitat predictors for site-occupancy of Aloe peglerae , an Endangered endemic species with a restricted range

article

Growth and Competition Between Seedlings of Protea repens (L.) L. and the Alien Invasive, Acacia saligna (Labill.) Wendl. in Relation to Nutrient Availability

scientific article published in 1991

Growth of seedlings of the invasives, Acacia saligna and Acacia cyclops in relation to soil phosphorus

scientific article published in 1994

Guidelines for improved management of riparian zones invaded by alien plants in South Africa

article

Harvested and standing wood stocks in protected and communal miombo woodlands of eastern Tanzania

scholarly article by Emmanuel J Luoga et al published July 2002 in Forest Ecology and Management

Harvesting impacts on commonly used medicinal tree species ( Catha edulis and Rapanea melanophloeos ) under different land management regimes in the Mpumalanga Lowveld, South Africa ⬇️

scientific article published on 19 December 2004

Height, branch-free bole length and bark thickness for six tree species used medicinally in South Africa ⬇️

scientific article published on 30 June 2005

Herbivory and N 2 -fixation drive plant and soil nutrient dynamics in a southern African savanna

scientific article published on 22 March 2016

Human-modified landscapes: patterns of fine-scale woody vegetation structure in communal savannah rangelands

Humans and elephants as treefall drivers in African savannas

scientific article published in 2017

Impact of biocontrol agents on Lantana camara in an inland area of South Africa

scientific article published on 02 January 2020

Impact of biocontrol on the seed regenerative capacity of <i>Lantana camara</i> L. (<i>sensu lato</i>) (Verbenaceae)

scientific article published on 06 March 2022

Impact of livestock grazing intensity on plant diversity of montane grassland in the northern Drakensberg, South Africa

scientific article published on 14 February 2021

Impacts of clearing invasive alien plants from 1995 to 2005 on vegetation structure, invasion intensity and ground cover in a temperate to subtropical riparian ecosystem

article

Implications of elevated carbon dioxide on the susceptibility of the globally invasive weed, Parthenium hysterophorus, to glyphosate herbicide

scientific article published on 30 January 2020

Initial response of riparian plant community structure to clearing of invasive alien plants in Kruger National Park, South Africa

article

Interactions between a stem gall fly and a leaf-spot pathogen in the biological control of Ageratina adenophora

article by L. Buccellato et al published June 2012 in Biological Control

Investigating the vulnerability of an African savanna tree (Sclerocarya birrea ssp. caffra) to fire and herbivory

scientific article published in 2011

Knowledge of plant resource use based on location, gender and generation

research work

Land Cover and Use Changes in Relation to the Institutional Framework and Tenure of Land and Resources in Eastern Tanzania Miombo Woodlands

scholarly article by E. J. Luoga et al published January 2005 in Environment, Development and Sustainability

Land-use and cover changes (1988-2002) around budongo forest reserve, NW Uganda: implications for forest and woodland sustainability

scholarly article by E. N. Mwavu & E. T. F. Witkowski published November 2008 in Land Degradation and Development

Land-use impacts on woody plant density and diversity in an African savanna charcoal production region

article

Landscape archetypes for ecological classification and mapping

Leaf Demography, Sclerophylly and Ecophysiology of Two Banksias With Contrasting Leaf Life Spans

scientific article (publication date: 1992)

Leaf specific mass confounds leaf density and thickness.

scientific article

Life-history traits of the edible stinkbug,Encosternum delegorguei(Hem., Tessaratomidae), a traditional food in southern Africa

article

Long-term impacts of abundant perennial water provision for game on herbaceous vegetation in a semi-arid African savanna woodland

Management approaches of conservation areas: Differences in woody vegetation structure in a private and a national reserve

scientific article published in 2014

Mapping landscape beta diversity of plants across KwaZulu-Natal, South Africa, for aiding conservation planning

article

Market profiles and trade in medicinal plants in the Lowveld, South Africa

article

Modelling the current and future dry-season distribution of the edible stinkbugEncosternum delegorgueiin sub-Saharan Africa

article

Modelling the persistence of an apparently immortal Banksia species after fire and land clearing

article

Monetary valuation of livelihoods for understanding the composition and complexity of rural households

article

Mortality and utilisation of Sclerocarya birrea subsp. Caffra between 2001 and 2008 in the Kruger National Park, South Africa

article

No two are the same: Assessing variability in broad-leaved savanna tree phenology, with watering, from 2012 to 2014 at Nylsvley, South Africa

article

Nutrient Limitation of Inflorescence and Seed Production in Leucospermum parile (Proteaceae) in the Cape fynbos

scientific article published in 1990

Of feathers and fur: Differential pollinator roles of birds and small mammals in the grassland succulentAloe peglerae

article

One African baobab species or two? Synonymy of Adansonia kilima and A. digitata

scientific article (publication date: 26 October 2016)

Parthenium avoids drought: Understanding the morphological and physiological responses of the invasive herb Parthenium hysterophorus to progressive water stress

scientific article published on 11 November 2019

Physiological response of Parthenium hysterophorus to defoliation by the leaf-feeding beetle Zygogramma bicolorata

Planning for the Maintenance of Floristic Diversity in the Face of Land Cover and Climate Change.

scientific article

Plant functional types determine how close postfire seedlings are from their parents in a species-rich shrubland

scientific article published on 10 October 2020

Plants for Peace? Conflict Management in the Development of Ten South African Outreach Nurseries

scientific article published in 2008

Population fragmentation may reduce fertility to zero in Banksia goodii - a demonstration of the Allee effect.

scientific article

Population structure and regeneration of multiple-use tree species in a semi-deciduous African tropical rainforest: Implications for primate conservation

article

Post-Fire Litter Microsites: Safe for Seeds, Unsafe for Seedlings

scientific article published in 1993

Post-fire vegetative recruitment of the alien grassGlyceria maximaat a KwaZulu-Natal Midlands dam, South Africa

article

Quantifying the Trade in Cycads (Encephalartos Species) in the Traditional Medicine Markets of Johannesburg and Durban, South Africa1

article

Recent exposure to African elephants after a century of exclusion: Rapid accumulation of marula tree impact and mortality, and poor regeneration

scientific article published in 2017

Recovery of Banksia and Hakea communities after fire in mediterranean Australia-the role of species identity and functional attributes

article

Regeneration by coppicing (resprouting) of miombo (African savanna) trees in relation to land use

article published in 2004

Regional and local (road verge) effects on size and fecundity in Banksia menziesii

scientific article published in 2006

Relationship between bark thickness and diameter at breast height for six tree species used medicinally in South Africa

article

Reproductive ecology of Aloe plicatilis, a fynbos tree aloe endemic to the Cape Winelands, South Africa

article

Reproductive potential and seed fate of Sclerocarya birrea subsp. caffra (marula) in the low altitude savannas of South Africa

scientific article published in 2011

Reproductive traits and accumulation of nitrogen and phosphorus during the development of fruits of Protea compacta R. Br. (Calcifuge) and Protea obtusifolia Buek. ex Meisn. (Calcicole)

article

Response to nutrient additions by the plant growth forms of sand-plain lowland fynbos, South Africa

article

Reviewing Biosphere Reserves globally: effective conservation action or bureaucratic label?

scientific article

Riparian vegetation management in landscapes invaded by alien plants: Insights from South Africa

article

SPECIAL SECTION: LAND USE OPTIONS IN DRY TROPICAL WOODLAND ECOSYSTEMS IN ZIMBABWE

scholarly article by Isla Grundy et al published June 2000 in Ecological Economics

Savanna tree-grass interactions: A phenological investigation of green-up in relation to water availability over three seasons

scientific article published in 2017

Savanna woody vegetation classification - now in 3-D

article published in 2013

Seed Bank Dynamics of Three Co-Occurring Banksias in South Coastal Western Australia: the Role of Plant Age, Cockatoos, Senescence and Interfire Establishment.

scientific article (publication date: 1991)

Seed production, seed bank dynamics, resprouting and long-term response to clearing of the alien invasive Solanum mauritianum in a temperate to subtropical riparian ecosystem

article

Seed production, seed banks and post-clearing resprouting of bugweed (Solanum mauritianum), an alien invasive weed in South Africa

scientific article published in 2007

Seed storage and germination in Kumara plicatilis, a tree aloe endemic to mountain fynbos in the Boland, south-western Cape, South Africa

article

Seed viability, germination and seedling emergence of the critically endangered stem succulent, Adenium swazicum , in South Africa

scientific article published in 2017

Seedling regeneration, environment and management in a semi-deciduous African tropical rain forest

scholarly article by Edward N. Mwavu & Edward T.F. Witkowski published October 2009 in Journal of Vegetation Science

Sexual Dimorphism in Anthonomus santacruzi (Coleoptera: Curculionidae): a Biological Control Agent of Solanum mauritianum Scopoli (Solanaceae)

scientific article published on 16 July 2020

Sifting through cycads: A guide to identifying the stem fragments of six South African medicinal Encephalartos species

article

Size-class prevalence of bulbous and perennial herbs sold in the Johannesburg medicinal plant markets between 1995 and 2001

article

Small-scale insights into the above- and below-ground invasion dynamics of Parthenium hysterophorus in a South African savanna: The potential role of stocking rate

scientific article published on 20 September 2021

Spatial distribution of soil seed banks of three African savanna woody species at two contrasting sites

scientific article published in 2000

Sprouting of woody species following cutting and tree-fall in a lowland semi-deciduous tropical rainforest, North-Western Uganda

article

Structure and spatial interactions of savanna trees along a local stress gradient in a semi-arid environment

scientific article published on 26 October 2020

Systematic land-cover change in KwaZulu-Natal, South Africa: Implications for biodiversity

article

Termite mounds vary in their importance as sources of vegetation heterogeneity across savanna landscapes

article by Justice Muvengwi et al published 16 July 2017 in Journal of Vegetation Science

Testing the performance of registered herbicides on the control ofCampuloclinium macrocephalum(Asteraceae) in South African grasslands

The Fuelwood Crisis in Southern Africa – Relating Fuelwood Use to Livelihoods in a Rural Village

article

The Impacts of Changes in Land Use on Woodlands in an Equatorial African Savanna

The Potential of Entomophagy and the use of the Stinkbug,Encosternum delegorgueiSpinola (Hemipera: Tessaratomidae), in sub-Saharan Africa

article

The South African Experience of Conservation and Social Forestry Outreach Nurseries

scientific article published on 01 November 2006

The amphibious invader: Rooted water hyacinth’s morphological and physiological strategy to survive stranding and drought events

The birds and the seeds: opportunistic avian nectarivores enhance reproduction in an endemic montane aloe

scientific article published in 2012

The classification conundrum: species fidelity as leading criterion in search of a rigorous method to classify a complex forest data set

The effects of heat and drought stress on the ecophysiological responses and growth of Afrocarpus falcatus and Podocarpus henkelii seedlings

scientific article published in 2022

The impact of commercial harvesting on Warburgia salutaris (‘pepper-bark tree’) in Mpumalanga, South Africa

article

The interactive effects of CO2 and water on the growth and physiology of the invasive alien vine Pereskia aculeata (Cactaceae): Implications for its future invasion and management

scientific article published on 28 November 2021

The race for space: tracking land-cover transformation in a socio-ecological landscape, South Africa

scientific article

The role of reproduction in Glyceria maxima invasion

The use of incidence-based species richness estimators, species accumulation curves and similarity measures to appraise ethnobotanical inventories from South Africa

article

Three-dimensional woody vegetation structure across different land-use types and -land-use intensities in a semi-arid savanna

Thresholds of change in a multi-use conservation landscape of South Africa: historical land-cover, future transformation and consequences for environmental decision-making

Topo-edaphic, floristic and physiognomic gradients of woody plants in a semi-arid African savanna woodland

scientific article published on 30 October 2004

Uncovering the cycad taxa (Encephalartos species) traded for traditional medicine in Johannesburg and Durban, South Africa

article

Use of the Stinkbug,Encosternum delegorguei(Hemiptera, Tessaratomidae), for Food and Income in South Africa

article

Using a deterministic population model to evaluate population stability and the effects of fruit harvesting and livestock on baobab (Adansonia digitata L.) populations in five land-use types

scientific article published in 2013

Valuation of communal area livestock benefits, rural livelihoods and related policy issues

Variations in seed size and shape in relation to depth of burial in the soil and pre- dispersal predation in Acacia nilotica, A. tortilis and Dichrostachys cinerea

scientific article published in 1997

Vegetation structure and composition associated with Aloe lettyae in dwindling grassland fragments: Fine-scale baseline data to underpin conservation efforts

scientific article published in 2022

Volume and financial value of species traded in the medicinal plant markets of Gauteng, South Africa

article

Water requirements for germination and early seedling establishment in four African savanna woody plant species

article

What lies beneath: detecting sub-canopy changes in savanna woodlands using a three-dimensional classification method

Where are the young baobabs? Factors affecting regeneration of Adansonia digitata L. in a communally managed region of southern Africa

article

Wild Foods: Safety Net or Poverty Trap? A South African Case Study

journal article from 'Human Ecology' published in 2018

Woody Species Alpha-diversity and Species Abundance Distributions in an African Semi-deciduous Tropical Rain Forest

article

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