Mexican sunflowers (Tithonia diversifolia) are invasive species that are widely distributed across southern and eastern Africa, where they impact negatively on rural livelihoods and biodiversity. (Photo credit: Greg Forsyth)
Mexican sunflowers (Tithonia species) are promoted as a green manure, but a survey of rural farmers revealed that these species are invasive, and have substantial negative impacts in addition to their benefits.
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18 February 2019
A garden with prickly pear (important for fruit fodder and hedging, but a health hazard, a pepper tree (important for shade and medicinal purposes), and syringa (important for shade but a health threat and a “messy” tree). (Photo credit: Ross Shackleton)
Understanding the trade-offs of invasive alien species for people’s livelihoods and the environment is becoming more prominent to help guide management and to avoid conflicts. One way of framing these benefits and costs are as ecosystem services and disservices.
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4 February 2019
Lantana (Lantana camara) flowers and leaves; b) Lantana infestation in Kenya; c and d) Lantana invasions in Ethiopia; e and f) photosentsitivity in cattle that have ingested Lantana. (Photo credits: Arne de Witt, MD Day, Oueensland Department of Primary Industries)
Findings from two recent papers by C·I·B postdoc, Ross Shackleton, highlight how the invasive plants prickly pear (Opuntia stricta) and Lantana (Lantana camara), cause negative impacts on local communities and the environment in Kenya and Uganda.
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29 May 2017
Dense stands of Siam weed (Chromolaena odorara) in Tanzania (Photo by Arne Witt)
Findings from a paper by a C·I·B post-doctoral fellow, Ross Shackleton, highlight how a recent invader, Siam weed (Chromolaena odorara), has significant negative impacts on the livelihoods of local communities and the environment in Tanzania.
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