The distribution of selected woody invasive alien species in small towns in the Eastern Cape, South Africa

Mabusela, A.; Shackleton, Charlie M.; Gwedla, Nanamhla

doi:10.1016/j.sajb.2021.05.019

Cited by 10 publications

(7 citation statements)

References 41 publications

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“…It was demonstrated in this study that 65% of the tree species were exotic, which is common in a developing country such as the DR Congo, where the introduction of exotic species in the country was driven by accidental or deliberate introductions of plant species by humans for the various purposes including cultural and economic needs [56]. The same trend was observed in the Eastern Cape of South Africa where 60% of the most frequently occurring tree species were alien [57]. Similarly, in Bangalore (India), 67% of the street trees were alien to India [56].…”

Section: Diversity Of Street Trees and Urban Forest Structuresupporting

confidence: 57%

Assessment of Street Tree Diversity, Structure and Protection in Planned and Unplanned Neighborhoods of Lubumbashi City (DR Congo)

et al. 2022

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Street trees are always considered a vital part of urban green infrastructure in urbanized areas through mitigating the negative effects caused by urbanization taking part in human well-being. However, little is still known about their diversity, structure and protection, mostly in Lubumbashi city in the Democratic Republic of the Congo (DR Congo), where the pace of urbanization is not only rapid but also unplanned. In this study, using an inventory, we have characterized the diversity, structure and protection measures of street trees along a land-use planning gradient in Lubumbashi for both planned and unplanned neighborhoods. From the results, a total of 1596 trees were encountered, comprising 40 species, 33 genera and 17 families, mostly dominated by exotic species (65%). In addition, most of the studied trees (63%) belonged to four species only (Jacaranda mimosifolia, Leucaena leucocephala, Mangifera indica, and Acacia auriculiformis) with Leucaena leucocephala and Jacaranda mimosifolia being highly represented in unplanned and planned neighborhoods, respectively. The most abundant diameter classes in the planned neighborhoods were those with at most 10 cm against the classes larger than 50 cm in the planned neighborhoods. In both neighborhoods, trees with protection equipment represent less than 35%. Furthermore, in planned neighborhoods notably, nearly half of the observed equipment is in a good condition. Despite the benefits associated with street trees, there is a need to reduce the proportion of exotic tree species by planting native utilitarian tree species.

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Section: Diversity Of Street Trees and Urban Forest Structuresupporting

confidence: 57%

Assessment of Street Tree Diversity, Structure and Protection in Planned and Unplanned Neighborhoods of Lubumbashi City (DR Congo)

et al. 2022

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“…Invasive alien tree species were more prevalent in Kasane township and its "suburb" Kazungula. In a similar study in the Eastern Cape, South Africa, Mabusela et al (2021) recorded more woody invasive alien species in townships than in other neighbourhoods. In Western Cape, South Africa, McLean et al (2018) also found 50% alien invasive plant species recorded to be naturalized within town.…”

Section: Discussionmentioning

confidence: 77%

Assessment of Diversity and Composition of Tree Species in Residential Areas of Chobe District, Northern Botswana

KASHE¹,

TEKETAY²,

MMUSI³

et al. 2022

AgricultForest

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A vegetation survey was conducted in Chobe district to document tree species in residential areas. The survey resulted in 44 tree species, representing 44 genera and 22 families across the nine study villages. The diversity and evenness ranged from 2.47-3.15 and 0.77-0.90, respectively. An average of 19, 7 and 5 native, exotic and alien tree species respectively, were recorded. The most frequent native tree species, e.g. Baikiaea plurijuga, in the residential areas was also the dominant species in the neighbouring woodlands, suggesting that the species was retained when the woodlands were converted to residential use. The indigenous fruit bearing tree species, namely Berchemia discolor and Sclerocarya birrea, and the exotic fruit-bearing tree species, namely Carica papaya and Mangifera indica, were dominant in most residential areas, signifying their contribution to household food security. Invasive alien tree species, Jatropha curcas and Leucaena leucocephala were most frequent and, therefore, need continuous monitoring to prevent their spread into natural ecosystems. The study recommends raising of public awareness about invasiveness of alien invasive tree species.Keywords: Native species; exotic species; alien species; invasive species; ecosystem services INTRODUCTION Tree species provide ecosystem services such as provisioning services (e.g. fuel-wood), cultural servies (e.g. spiritual service) and regulating services (e.g. climate regulation). In rural areas, they are essential in provision of firewood

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“…Urban greening is largely considered to improve the well-being of citizens; however, if not properly maintained, it can be the source of ecosystem disservices, which could be a major public health issue. For example, in one study, they found out that urban forests in poor hygienic conditions might be the source of vector-borne diseases [87].…”

Section: Research Focus Analysismentioning

confidence: 99%

Urban Green Spaces in Africa: A Bibliometric Analysis

Muhoza,

Zhou

2024

Environments

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Africa has a lower proportion of urban areas compared to other continents, yet it is experiencing rapid urbanization, which is posing a significant threat to the urban ecosystem. This study presents the results of a bibliometric analysis from publications on urban green spaces (UGS) research in African cities. From the Web of Science, Science Direct, Google Scholar, and PubMed databases, 264 articles on UGS research in Africa were included in this study. This research topic experienced rapid growth, as more than 68% of all the articles were produced in the past five years, where about 63% of the studies included in this analysis were carried out in only four countries. Most of the studies were carried out at the intracity scale, with the main focus being on the ecosystem services provided by UGS. Change detection and overall UGS mapping studies show that high-income cities have a high percentage of UGS, while many African cities exhibited lower green coverage. We commend the work from researchers; however, there is still a gap to fill both in terms of high-quality datasets and state-of-the-art technology usage, and there is also a need for more comparative studies among cities and countries at the continental scale.

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The distribution of selected woody invasive alien species in small towns in the Eastern Cape, South Africa

Cited by 10 publications

References 41 publications

Assessment of Street Tree Diversity, Structure and Protection in Planned and Unplanned Neighborhoods of Lubumbashi City (DR Congo)

Assessment of Street Tree Diversity, Structure and Protection in Planned and Unplanned Neighborhoods of Lubumbashi City (DR Congo)

Assessment of Diversity and Composition of Tree Species in Residential Areas of Chobe District, Northern Botswana

Urban Green Spaces in Africa: A Bibliometric Analysis

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