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Abstract

UNESCO World Heritage Sites (WHS) are areas of outstanding universal value and conservation importance. They are, however, threatened by a variety of global change drivers, including biological invasions. We assessed the current status of biological invasions and their management in 241 natural and ...

Author(s)
Shackleton, R. T.; Bertzky, B.; Wood, L. E.; Bunbury, N.; Jäger, H.; Merm, R. van; Sevilla, C.; Smith, K.; Wilson, J. R. U.; Witt, A. B. R.; Richardson, D. M.
Publisher
Springer, Amsterdam, Netherlands
Citation
Biodiversity and Conservation, 2020, 39, 11/12, pp 3327-3347
Abstract

For decades, development agencies, donors, and others have worked to improve the social and economic reality of people living in the developing world through inputs into the agricultural and fisheries sectors. To improve agricultural production and stem land degradation, often brought about by...

Author(s)
Witt, A. B. R.
Publisher
Springer International Publishing AG, Cham, Switzerland
Citation
Impact of biological invasions on ecosystem services, 2017, pp 295-310
Abstract

Background: Many alien plant species, such as Tithonia diversifolia, T. rotundifolia and T. tubaeformis, have been introduced to areas outside of their natural distribution range to provide benefits, but have subsequently become invasive, threatening biodiversity and agricultural productivity....

Author(s)
Witt, A. B. R.; Shackleton, R. T.; Beale, T.; Nunda, W.; Wilgen, B. W. van
Publisher
South African National Biodiversity Institute, Pretoria, South Africa
Citation
Bothalia - African Biodiversity & Conservation, 2019, 49, 1,
AbstractFull Text

Author(s)
Witt, A. B. R.; Day, M. D.; Cock, M. J. W.
Publisher
University of Cape Town, Cape Town, South Africa
Citation
Proceedings of the XIV International Symposium on Biological Control of Weeds, Kruger National Park, South Africa, 2-7 March 2014, 2014, pp 151
AbstractFull Text

Two biotypes of Chromolaena odorata (L.) King & Robinson (Asteraceae: Eupatorieae) are invading sub-Saharan Africa. One (the Asian/West African biotype) is spreading from tropical West Africa and the other (the southern African biotype) from south-eastern Africa. The area invaded by the former...

Author(s)
Zachariades, C.; Rensburg, S. J. van; Witt, A. B. R.
Publisher
ARC-Plant Protection Research Institute, Pretoria, South Africa
Citation
Proceedings of the Eighth International Workshop on Biological Control and Management of Chromolaena odorata and Other Eupatorieae, 1-2 November 2010, Nairobi, Kenya, 2013, pp 20-27
AbstractFull Text

Author(s)
Witt, A. B. R.
Publisher
ARC-Plant Protection Research Institute, Pretoria, South Africa
Citation
Proceedings of the Eighth International Workshop on Biological Control and Management of Chromolaena odorata and Other Eupatorieae, 1-2 November 2010, Nairobi, Kenya, 2013, pp 11-17
Abstract

Opuntia stricta (Haw.) Haw (Cactaceae) is invasive in Laikipia County, Kenya, impacting negatively on biodiversity and livelihoods. To control this invasive plant the biocontrol agent Dactylopius opuntiae (Cockerell) (Hemiptera; Dactylopiidae) 'stricta' biotype was released in 2014. A preliminary...

Author(s)
Witt, A. B. R.; Nunda, W.; Makale, F.; Reynolds, K.
Publisher
Springer, Amsterdam, Netherlands
Citation
BioControl, 2020, 65, 4, pp 515-523
Abstract

This article provides a preliminary list of alien plant species in the Serengeti-Mara ecosystem in East Africa. The list is based on broad-scale roadside surveys in the area and is supplemented by more detailed surveys of tourist facilities in the Masai-Mara National Reserve and adjoining...

Author(s)
Witt, A. B. R.; Kiambi, S.; Beale, T.; Wilgen, B. W. van
Publisher
South African National Parks, Pretoria, South Africa
Citation
Koedoe, 2017, 59, 1, pp Art. #1426
Abstract

Many cactus species have been introduced around the world and have subsequently become major invaders, inducing social and ecological costs. We recorded the distribution of Opuntia stricta in eastern Africa, and conducted 200 household interviews using semi-structured questionnaires to assess local ...

Author(s)
Shackleton, R. T.; Witt, A. B. R.; Piroris, F. M.; Wilgen, B. W. van
Publisher
Springer, Amsterdam, Netherlands
Citation
Biological Invasions, 2017, 19, 8, pp 2427-2441
Abstract

Cecidochares connexa is currently the only effective biological control agent of Chromolaena odorata an invasive weed in West Africa. Recently, an ectoparasitoid species belonging to the Ormyrus genus was found parasitizing C. connexa in three regions of Ghana. Adult parasitoid emergence...

Author(s)
Aigbedion-Atalor, P. O.; Idemudia, I.; Witt, A. B. R.; Day, M. D.
Publisher
Springer Berlin, Heidelberg, Germany
Citation
Journal of Plant Diseases and Protection, 2019, 126, 1, pp 93-95

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