Guide to the naturalized and invasive plants of Laikipia

Witt, Arne

doi:10.1079/9781786392152.0000

Cited by 13 publications

(3 citation statements)

References 40 publications

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“…On the contrary, northern African countries were projected to be the nonsuitable habitat for S. didymobotrya invasion under current and future climatic conditions. Our present result concurs with that of the report made by Witt and Luke (2017), which put Senna spp. as among the most occurring alien invasive species in many habitats of eastern and southern African countries.…”

Section: Discussionsupporting

confidence: 94%

“…Nevertheless, despite the loss in a higher range of suitability, eastern African countries remain the main hotspot location of S. didymobotrya future invasion. According to Witt and Luke (2017) and Witt et al (2018), the future alien invasive plant species distribution including S. didymobotrya in most habitat range of eastern African countries is highly facilitated by increased land degradation, overgrazing, deforestation of native forest, and the associated impacts of climate change.…”

Section: Discussionmentioning

confidence: 99%

“…S. didymobotrya, also named as a bush encroacher, is known to suppress the regeneration and growth of native plant species by forming large dense impenetrable brushes and mono-cropping stands (Witt et al 2018) and obstructing the movement of wild animals. It can easily establish itself in diverse habitat types, including grasslands, woodlands, forests, riparian zones, dumpsite, disturbed area, and coastal scrub (Tamiru 2017;Witt and Luke 2017). For instance, high invasion of S. didymobotrya was reported in forest reserves in Uganda (Winterbottom and Eilu 2006), in degraded land, urbanized land, coastline, savanna, and grassland of southern Africa (Nel et al 2004;Rambuda and Johnson 2004;Terzano et al 2018) and in several parts of Ethiopia (Fessehaie and Tessema 2014;Fufa et al 2017;Shiferaw et al 2018;Tamiru 2017).…”

Section: Introductionmentioning

confidence: 99%

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Predicting invasion potential of Senna didymobotrya (Fresen.) Irwin & Barneby under the changing climate in Africa

Weldemariam

Sintayehu

2021

Ecol Process

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Background Senna didymobotrya is a native African flowering shrub. It is suspected that climate change encourages the introduction and spread of invasive alien species. The possible invasion of S. didymobotrya across the continent is expected to increase in the future due to ongoing climate change. Nonetheless, there is still paucity of empirical evidence on the extent to which the changing climate contributes to the surge of the flowering shrub. This study, therefore, investigated the present and potential invasion of S. didymobotrya using the species distribution model under changing climate conditions. The two representative concentration pathways (RCP4.5 and RCP8.5) and eight bioclimatic variables and one topographic variable were used to simulate the current and future (2050s and 2070s) invasion of S. didymobotrya in Africa. The model performance was assessed using the area under the receiver operating characteristic curve (AUC) and true skill statistics (TSS). Results The results of the study showed that under the current climatic conditions, 18% of Africa is suitable for the establishment and invasion of S. didymobotrya. The most suitable hotspot for S. didymobotrya invasion is eastern Africa, followed by southern Africa. The predicted model showed that by 2050, 3.3% and 3.12% of the continent would be highly suitable areas for the invasion of the species under RCP4.5 and RCP8.5, respectively. In the 2070s, under RCP4.5 and RCP8.5, the highly suitable area would be 3.13% and 2.7%, respectively. In relation to the current suitability, the cumulative projected areas of the low and moderate suitability class under RCP4.5 and RCP8.5 will rise by the years 2050 and 2070. However, under both RCPs, the non-suitable area for S. didymobotrya invasion would gradually decrease. Conclusions From the findings, it can be concluded that the ecosystem’s vulnerability to S. didymobotrya invasion under future climatic conditions will proliferate significantly. Hence, to prevent the projected harm to biodiversity and ecosystem services, governments need to focus their future biodiversity management and policy directions on the means and strategies of minimizing the invasion and the distribution rate of S. didymobotrya across habitat types.

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Section: Discussionsupporting

confidence: 94%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Predicting invasion potential of Senna didymobotrya (Fresen.) Irwin & Barneby under the changing climate in Africa

Weldemariam

Sintayehu

2021

Ecol Process

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Predicting current and future distribution of Hovenia dulcis Thunb. (Rhamnaceae) worldwide

et al. 2022

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Biological invasions are increasingly recognized as one of the major threats to biodiversity. The Japanese raisin tree (Hovenia dulcis) is native to East Asia, however, in southeastern South America this species has become one of the most pervasive invaders. Hovenia dulcis has many biological characteristics that favor the process of invasion and few studies have indicated changes in the structure and composition of native plant communities where this species has become invader. Given the invasiveness shown in southeastern South America, our main goal was to identify the potentially suitable habitats for this invasive species at a global scale. In this sense, we modeled the potential distribution of H. dulcis along the terrestrial areas worldwide using an ensemble forecasting approach. Additionally, the percentage of overlapping biodiversity hotspot areas with the currently suitable areas for this species was calculated. Our results revealed that the current potential H. dulcis range is equivalent to 7.88% (12,719,365 km2) of the terrestrial area worldwide. For the future scenarios of climate change, the potential distribution area tends to have a small reduction. However, significant suitable areas were identified for H. dulcis range in the northern limits of the boreal distribution. Currently, around 17% of biodiversity hotspot areas overlap with the suitable areas for H. dulcis occurrence. In summary, given that the prevention is well-recognized as a more effective management action against invasive alien species, it is essential to implement policies to prevent H. dulcis introduction in suitable areas worldwide, as well as local population control, especially in biodiversity hotspots.

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Gender analysis of access and control of resources and livelihoods in pastoral livelihood systems: the case of Kurikuri Community land in Laikipia County, Kenya

Kaua,

Gitonga

2023

SN Soc Sci

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Guide to the naturalized and invasive plants of Laikipia

Cited by 13 publications

References 40 publications

Predicting invasion potential of Senna didymobotrya (Fresen.) Irwin & Barneby under the changing climate in Africa

Predicting invasion potential of Senna didymobotrya (Fresen.) Irwin & Barneby under the changing climate in Africa

Predicting current and future distribution of Hovenia dulcis Thunb. (Rhamnaceae) worldwide

Gender analysis of access and control of resources and livelihoods in pastoral livelihood systems: the case of Kurikuri Community land in Laikipia County, Kenya

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