Accueil / Membres / Doctorants, ATER, Post-doc / NIANG Cheikh Tidiane

NIANG Cheikh Tidiane

Doctorant en Écologie. Cotutelle entre Université Gaston Berger de Saint-Louis (UGB/Sénégal) et Aix-Marseille Université (AMU/France). Écoles doctorales Sciences et Technologies (UGB) & Sciences de l’environnement (ED 251-AMU).


Formation :

2014-2016 MASTER 2 en Biologie Animale (spécialité Parasitologie) à la Faculté des Sciences et Techniques (FST) de l’Université Cheikh Anta Diop de Dakar (UCAD)- Mention Très Bien

2012-2013 LICENCE 3 en Sciences de la Vie (SV) à la Faculté des Sciences et Techniques (FST) de l’Université Cheikh Anta Diop de Dakar (UCAD)- Mention Assez bien

2009-2010 Baccalauréat série S2 (Sciences expérimentales) au Lycée de Mbao (Mbao, Sénégal) - Mention Passable

Sujet de thèse

Changements socio-environnementaux et variations des communautés de rongeurs et de leurs parasites : le contexte des aménagements hydro-agricoles majeurs dans la vallée du fleuve Sénégal

Thesis project :

Ecosystems are increasingly exposed to global changes of anthropogenic origin, which include climate, biodiversity, or land use. These global changes may be the cause of major agricultural problems via deforestation, an increase of crop pests and, an impact on crop yields. These changes may also have severe direct or indirect health consequences via animal populations acting as reservoirs of zoonoses.

Parasitism is increasingly considered as an important potential factor affecting the response of species to global change. Parasites can regulate the abundance of their host population, influence the structure and composition of communities, and affect the composition of ecosystems. Several studies thus show an impact of global changes on the incidence and severity of diseases, with consequences on the dynamics of their animal host populations.
In Senegal, rice production is still insufficient to cover household consumption needs despite the availability of arable land and a river in the North. As part of the national program of self-sufficiency in rice and large irrigation projects in the Senegal River Valley, agricultural development programs aimed at increasing production and stocks have been implemented. These changes are accompanied by an increase in the food resources and water around which human populations, livestock, rodents and associated parasites / pathogens concentrate and meet, with expected consequences in terms of health and food security.

It is in this context that my thesis will be implemented : falls in order to determine the rodent communities (identification of species) pests of culture present in the valley of the Senegal River but also, to characterize the species of parasites that they shelter (gastrointestinal helminths and dermatophytes fungi), and which could be source of diseases, especially to impact the dynamics of these populations of rodents. This thesis will also make it possible to estimate the damage caused to the fields and the stocks by these rodents, so as to be able to alert but also to take adequate measures for a fight against these pests of cultures.

The doctoral project is based on two objectives, the first one will aim to describe the diversity of biological communities, the second one aims at estimating their impact. The first objective consists in the evaluation of the influence of socio-environmental changes in the valley of the Senegal River on the communities of rodents and on their interactions with their parasites, more particularly gastro-intestinal helminths (parasitic worms of the digestive tract) and dermatophytes (filamentous fungi responsible for cutaneous infections). The second objective is to estimate the impact of rodent communities in the fields and in storage conditions, and to identify socio-environmental factors that influence their damages, in order to alert but also to implement adequate management actions against the crop pests.

Key words : Rodents, Gastro-intestinal helminths, Dermatophytes fungi, Community Ecology, Hydro-agricultural schemes, Parasite-rodent-human interactions

Communications :

  • Niang C. T. 2018. Présentation orale de 5mn à la 5e journée scientifique de l’OSU Institut Pythéas, intitulée « Cap au Sud ! Coopération Scientifique et Recherche pour le Développement » Marseille, le 08/10/2018.
  • Niang C. T. 2018. Changements socio-environnementaux et variations des communautés de rongeurs et de leurs parasites. Présentation orale aux Journées annuelles 2018 du groupe Rongeurs du CBGP, Séminaire sur les rongeurs à Montpellier, 02-03/10/2018,
  • Niang C. T. 2018. Riziculture, rongeurs et parasites. Présentation orale lors de l’atelier de travail sur les espèces envahissantes. Cotonou, le 06/12/2018.

Financement(s) :

  • Allocations de Recherche pour une Thèse au Sud (ARTS-IRD)
  • ObsMice : Observatoire ouest africain des petits mammifères Indicateurs de Changements Environnementaux (OSU-Pythéas, AMU)
  • Projet R2P : Rodents, Rice and Parasites (OT-MED, AMU)

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