Les villes en Afrique avant 1900. Bilan historiographique et perspectives de recherche

Coret, Clélia; Zaugg, Roberto; Chouin, Gérard

doi:10.4000/afriques.3043

Cited by 5 publications

References 40 publications

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Ecological plasticity to ions concentration determines genetic response and dominance of Anopheles coluzzii larvae in urban coastal habitats of Central Africa

Longo-Pendy

Téné-Fossog

Tawedi

et al. 2021

Sci Rep

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In Central Africa, the malaria vector Anopheles coluzzii is predominant in urban and coastal habitats. However, little is known about the environmental factors that may be involved in this process. Here, we performed an analysis of 28 physicochemical characteristics of 59 breeding sites across 5 urban and rural sites in coastal areas of Central Africa. We then modelled the relative frequency of An. coluzzii larvae to these physicochemical parameters in order to investigate environmental patterns. Then, we assessed the expression variation of 10 candidate genes in An. coluzzii, previously incriminated with insecticide resistance and osmoregulation in urban settings. Our results confirmed the ecological plasticity of An. coluzzii larvae to breed in a large range of aquatic conditions and its predominance in breeding sites rich in ions. Gene expression patterns were comparable between urban and rural habitats, suggesting a broad response to ions concentrations of whatever origin. Altogether, An. coluzzii exhibits a plastic response to occupy both coastal and urban habitats. This entails important consequences for malaria control in the context of the rapid urban expansion in Africa in the coming years.

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Ecological plasticity to ions concentration determines genetic response and dominance of Anopheles coluzzii larvae in urban coastal habitats of Central Africa

Longo-Pendy

Téné-Fossog

Tawedi

et al. 2021

Sci Rep

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Delineating African cities (large urban regions) to compare them within global urban networks

Rogromel,

Rozenblat

2024

cybergeo

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An important issue for Africa is evaluating cities' capacities to leverage global networks effectively to foster local development. However, this evaluation is complicated by the absence of a unified framework and criteria, making it difficult to compare African cities to both each other and with cities around the world. The first step, therefore, is to establish a basis for comparing African cities. In this paper, we address the challenges of defining urban boundaries for cities across Africa's 54 countries. We outline our methodology and present the results of adapting the concept of Large Urban Regions (LURs) (Rozenblat, 2020), which encompass regional urbanized areas surrounding the main African cities. In total, we delineated 304 African Large Urban Regions, covering 5,522 Local Administrative Units (LAU). This delineation of LURs enables African urban areas to be comparable with others worldwide and paves the way for evaluating their integration into global urban networks, especially through multinational firms, of which over 98% in our sample are located within these designated LURs.

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Bibliographie essentielle pour la problématique de l’ouvrage

Saupin¹

2023

L’émergence Des Villes-Havres Africaines Atlantiques

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Les villes en Afrique avant 1900. Bilan historiographique et perspectives de recherche

Cited by 5 publications

References 40 publications

Ecological plasticity to ions concentration determines genetic response and dominance of Anopheles coluzzii larvae in urban coastal habitats of Central Africa

Ecological plasticity to ions concentration determines genetic response and dominance of Anopheles coluzzii larvae in urban coastal habitats of Central Africa

Delineating African cities (large urban regions) to compare them within global urban networks

Bibliographie essentielle pour la problématique de l’ouvrage

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