Search results for: Edward T. F. Witkowski

Items from 1 to 7 out of 7 results

article

Termite mound vegetation patterns are largely driven by stochastic rather than deterministic processes at regional scale in Africa: A meta‐analysis

Justice Muvengwi, Edward T. F. Witkowski, David Ward

Journal of Vegetation Science > 31 > 4 > 540 - 550

Questions Although the biogeography of plant communities has been well studied, mechanisms controlling plant community diversity are still poorly understood. Stochastic and deterministic processes are hotly debated as being key in structuring communities across taxa. Here we ask, to what extent are plant communities on termite mounds shaped by either stochastic or deterministic processes within and...

article

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

Justice Muvengwi, Edward T. F. Witkowski, Andrew B. Davies, Francesca Parrini, more

Journal of Vegetation Science > 28 > 5 > 1008 - 1017

Questions Termite mounds are known to host a suite of unique plants compared with the surrounding savanna matrix. However, most studies testing the significance of mounds for ecosystem heterogeneity have been conducted at single sites. Mound effects on savanna heterogeneity across varying landscapes are less well understood, and how effects might vary across geological types and mounds of different...

article

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

Vettes N. Kalema, Edward T. F. Witkowski, Barend F. N. Erasmus, Edward N. Mwavu

Land Degradation & Development > 26 > 7 > 632 - 641

Savanna landscapes are vitally important in providing both ecological and economic services that sustain local livelihoods and national economies, particularly for sub‐Saharan African countries whose economies are mainly agrarian. Development prospects in savanna landscapes are however dependent on actions to avoid and to slow or reverse degradation and that are aided with a clear understanding of...

article

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

Kaera L. Coetzer, Edward T. F. Witkowski, Barend F. N. Erasmus

Biological Reviews > 89 > 1 > 82 - 104

The Biosphere Reserve (BR) model of UNESCO's Man and the Biosphere Programme reflects a shift towards more accountable conservation. Biosphere Reserves attempt to reconcile environmental protection with sustainable development; they explicitly acknowledge humans, and human interests in the conservation landscape while still maintaining the ecological values of existing protected areas. Conceptually,...

article

The Race for Space: Tracking Land-Cover Transformation in a Socio-ecological Landscape, South Africa

Kaera L. Coetzer, Barend F. N. Erasmus, Edward T. F. Witkowski, Belinda Reyers

Environmental Management > 2013 > 52 > 3 > 595-611

Biosphere Reserves attempt to align existing biodiversity conservation with sustainable resource use, specifically for improving socio-economic circumstances of resident communities. Typically, the Biosphere Reserve model is applied to an established landscape mosaic of existing land uses; these are often socio-ecological systems where strict environmental protection and community livelihoods are...

article

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

Vivienne L. Williams, Edward T. F. Witkowski, Kevin Balkwill

Biodiversity and Conservation > 2007 > 16 > 9 > 2495-2513

The incorporation of suitable quantitative methods into ethnobotanical studies enhances the value of the research and the interpretation of the results. Prediction of sample species richness and the use of species accumulation functions have been addressed little in applied ethnobotany. In this paper, incidence-based species richness estimators, species accumulation curves and similarity measures...

article

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

Vivienne L. Williams, Edward T. F. Witkowski, Kevin Balkwill

Biodiversity and Conservation > 2005 > 14 > 12 > 2971-3001

The lack of scientific rigour in analysing ethnobotanical surveys has prompted researchers to investigate ways of quantitatively describing their data, including the use of ecological diversity indices. There are numerous indices and measures available to describe sample diversity. Twenty-two measures of species richness, diversity and evenness were reviewed using six sets of ethnomedicinal data derived...

Filter options

Publication date

Set your own date range

Keywords

SPECIES RICHNESS (3)
BIODIVERSITY CONSERVATION (2)
MACROTERMES (2)
QUANTITATIVE ETHNOBOTANY (2)
ESTIMATES (1)
ABUNDANCE (1)
ALTITUDINAL GRADIENT (1)
BASALT (1)
BETA DIVERSITY (1)
BIOMASS ENERGY (1)
BIOMASS PRODUCTION (1)
CHARCOAL PRODUCTION (1)
COMPLIMENTARITY (1)
DIVERSITY (1)
ECOSYSTEM HETEROGENEITY (1)
EVENNESS (1)
FRAGMENTATION (1)
GRANITE (1)
INTERDISCIPLINARY SCIENCE (1)
KRUGER TO CANYONS BIOSPHERE RESERVE (1)
LAND-COVER CHANGE (1)
LANDSAT IMAGERY (1)
LANDSCAPE CONNECTIVITY (1)
LATITUDINAL GRADIENT (1)
LIVELIHOODS (1)
LIVESTOCK GRAZING (1)
MAN AND THE BIOSPHERE PROGRAMME (1)
MAN AND THE BIOSPHERE PROGRAMME (MAB) (1)
NESTEDNESS (1)
PROTECTED AREAS (1)
RAREFACTION (1)
RICHNESS ESTIMATION (1)
SAMPLING EFFORT (1)
SAVANNA (1)
SOCIO‐ECOLOGICAL SYSTEMS (1)
SOIL NUTRITION (1)
SPATIAL EXTENT (1)
SPATIAL ZONATION (1)
SPECIES ACCUMULATION CURVE (1)
SPECIES ACCUMULATION CURVES (1)
SPECIES TURNOVER (1)
SUBSISTENCE AGRICULTURE (1)
SUSTAINABLE DEVELOPMENT (1)
TERMITE MOUNDS (1)
TRADE‐OFFS (1)
TRADITIONAL MEDICINAL TRADE (1)
TRADITIONAL MEDICINE TRADE (1)
UNESCO (1)
WOODLANDS (1)
more

Data set

Wiley (4)
Springer (3)

INFONA - science communication portal

Search results for: Edward T. F. Witkowski

Termite mound vegetation patterns are largely driven by stochastic rather than deterministic processes at regional scale in Africa: A meta‐analysis

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

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

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

The Race for Space: Tracking Land-Cover Transformation in a Socio-ecological Landscape, South Africa

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

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

Add recipient

Sending message cancelled

Are you sure you want to cancel sending this message?

Send message

Filter options

Publication date

Date range setting

Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.

Keywords

Data set

Journal

Reporting an error / abuse

Sending the report failed

Accessibility options