Distribution and abundance of emerging invasive weeds in central Western part of Ethiopia

Fufa, Amare; Tessema, Taye; Hundessa, Niguse

doi:10.5897/ajar2016.11922

Cited by 6 publications

(7 citation statements)

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“…as among the most occurring alien invasive species in many habitats of eastern and southern African countries. Furthermore, our current invasion distribution model result is in parallel with studies conducted in different parts of Africa (Dlamini 2016;Fessehaie and Tessema 2014;Fufa et al 2017;Jaca and Condy 2017;Nel et al 2004). Like the study by Bellard et al (2018) proves that climate change has affected the distribution of invasive species causing expansions in climatically suitable habitats worldwide, this research evinces that future climate change would cause a similar increase of invasion in the climatically suitable areas of S. didymobotrya in Africa.…”

Section: Discussionsupporting

confidence: 85%

“…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). Its further expansion would worsen the problem, leading to great environmental and socio-economic damage.…”

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: 85%

Section: Introductionmentioning

confidence: 99%

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

Weldemariam

Sintayehu

2021

Ecol Process

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“…(2010) [18] have also observed Parthenium infestations along road sides, habitation areas such as towns, waterways and crop lands. Similar findings were reported elsewhere in different parts of the country ( [5,1,18,28] . Our results are also in line with Mcconnachie et al (2011) [22] who reported the suitability of disturbed habitats such as roadsides, railway tracks, building areas and agricultural areas for Parthenium establishment because of lack of competition.…”

Section: Respondents Socio-demographic Statussupporting

confidence: 92%

Assessments impact of an invasive alien weed species on indigenous species and its management practices in eastern Hararghe, Ethiopia

Tamiru¹

2020

Int. J. Res. Agron.

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Invasive alien species are non-indigenous species that adversely affect, economically, environmentally or ecologically habitats. An assessment was conducted to identify Impact of an Invasive Alien weed Species on Indigenous Species and its management practices in eastern Hararghe, Ethiopia and community's perception on their socioeconomic and ecological impacts. The survey area was randomly selected and the total numbers of respondents were 80. The major threat and challenge were loss of biodiversity and crop production due to high spread rate, prolific seed production and high regeneration capacity of invasive alien plants. Respondents noted that invasion of both disturbed and undisturbed areas in the study districts was adversely affected fertility status of soils, suppresses growth of grasses, other herbaceous plants, bush lands and economically important crops, human and livestock health. To prevent the entry of invasive plants utilization of invasive alien plant species as firewood, construction, fence, feed and erosion control were major tackle of their management. Adoption of an integrated management program is mandatory in instead of depending on any single option. Researchers urgently need to characterize and quantify the socioeconomic impacts and devised proper strategies for cost effective and time efficient management options of invasive alien species.

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“…Taye et al, (2010) have also observed Parthenium infestations along road sides, habitation areas such as towns, waterways and crop lands. Similar findings were reported elsewhere in different parts of the country (Berhanu et al 2015;Jemal and Taye 2015;Amare et al 2017;Reda and Tewelde, 2018).…”

Section: Reported Thatsupporting

confidence: 91%

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Mohammed

Fessehai

2020

J. Res. Weed Sci.

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The study was conducted with the aim of assessing the distribution and abundance of invasive alien plant species (IAPS) in two administrative Zones (1 and 3) of the Afar region. Data were collected using systematic sampling technique and regular intervals of 10 km were used during the field survey. The following weeds Calotropis procera, Cryptostegia grandiflora, Jatropha curcas, Lantana camara, Opuntia stricta, Parkinsonia aculeata, Parthenium hysterophorus, Prosopis juliflora, Senna occidentalis, and Solanum incanum were recorded in this study. Prosopis was found in 38% of the 91 sample waypoints in the altitude range of 347-1005 meters above sea level whereas C. procera was recorded in 28% of the interceptions between 347 m and 1010 meters above sea level. P. hysterophorus occurred in 15 % of the waypoints in the altitudes ranged from 603 to 1005 meters above sea level. C. grandiflora and P. aculeata were observed respectively in 3% and 6% of the interceptions while L. camara and O. stricta were recorded only at a single waypoint. Higher abundance levels were observed for P. juliflora and C. procera. The majority of the IAPS were found infesting diversified habitats such as road sides, cropland, grazing land, riversides, forest and habitation areas. Awash Fentale district had the highest IAPS richness by possessing all the recorded species. The detailed distribution maps of the identified IAPS were developed and prioritization and ranking of invasive species was made based on abundance levels. The results of this study can be used in invasive weed management or extension programs that aim to tackle major IAPS problems in the region.

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Distribution and abundance of emerging invasive weeds in central Western part of Ethiopia

Cited by 6 publications

References 1 publication

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

Assessments impact of an invasive alien weed species on indigenous species and its management practices in eastern Hararghe, Ethiopia

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