MAGNET - Modeling and analysis for tropical agronomy and ecosystems

Keywords
Discrete and/or continuous dynamic systems
Mathematical modelling
Statistics
Bayesian modelling
Data analysis
Nonlinear analysis
Calibration
Scientific computing
Numerical simulations
Applications to temperate or tropical ecosystems, crop protection, vector control

Develop and promote the use of theoretical and numerical approaches, while proposing / developing dedicated analysis tools. Emphasis is placed on dialogue between thematic issues, explorations of new modelling formalisms, and between calibration and data acquisition.

With the development of new technologies to retrieve and analyse data, the increase in the capacity of computers, a better understanding of our environment, one might think that modelling complex systems and, above all, simulating them, has become easier, more affordable, almost a formality. This may be true in the case of systems that are perfectly known, but what about systems about which we have little information. Although observation and experiment remain indispensable in the study of our environment, theoretical modelling, analysis and simulation of the models can help to better discern the important processes to be studied in the field, to better determine the data that will be truly useful in understanding the dynamics of the system. The objective is thus to minimise the effort for data collection, but also to direct the observations/experiments on particular points of the studied system, avoiding also collection of useless (and often expensive) data.
Thus, models of continuous, discrete or hybrid types are developed, with various applications such as the analysis of forest dynamics, agro- and socio-ecosystems, tree-grass biomass interactions in savannah, crop protection against pests and disease vectors, plant-insect interactions, optimisation of yields in forest management, etc.
This work makes it possible to establish potentially cross-cutting formalisms, to test hypotheses and, as indicated above, to identify influential parameters to guide data collection. In so doing, they contribute not only to developing new mathematical questions, but also to increasing the effectiveness and relevance of thematic research.
We demonstrate the validity of our approach by covering a wide range of applications, with other research topics of the laboratory and with external collaborators, in France and abroad, particularly in southern countries (South Africa, Cameroon, Indonesia, Reunion Island, etc.).
In the latter, we also aim to develop interdisciplinarity between digital and life sciences, in highly fragmented academic contexts.

While continuing the development and study of new models, in collaboration with our biologists, we wish to develop and study new ranges of models, such as, for example, the so-called mesoscopic models, which make it possible to make the link between macroscopic models (mainly developed at present) and microscopic models (such as individual-centred models), and models adapted for the qualitative and formal study of complex ecosystems.
Another important area of study is that of spatially explicit formalisms, particularly on ecosystem and crop protection issues. These developments are closely associated with the development and use of Scientific Computation (for simulations) and Statistics (data analysis, protocol development, etc.), in collaboration with our partners from Northern and, particularly, Southern countries.

Acronym Title Duration
CeraTIS CorseGestion Territoriale de la Ceratite en Corse par la Technique de l’Insecte Stérile
Project PI: Clélia OLIVA (CITFL)  
2020 - 2023
ELA-PALMModélisation des Interactions Elaeidobius-Palmier
Project PI: Yves DUMONT 
2014 - 2022
EPITAGModélisation et Contrôle en Epidémiologie pour l’Agronomie Tropicale
Project PI: Suzanne TOUZEAU (INRA, BIOCORE)  / Samuel BOWONG (U. de Douala, Cameroun)  
2020 - 2022
GEMDOTISEvaluation de la faisabilité d'une GEstion Multi-échelles d’un ravageur invasif Bactrocera DOrsalis sur manguier à La Réunion, incluant la Technique de l’Insecte Stérile
Project PI: Jean-Philippe DEGUINE (UMR PVBMT)  
2019 - 2022
SESASAA Social-Ecological System Approach towards a Sustainable Intensification of Agricultural Production in Sub-Saharan Africa
Project PI: Cédric GAUCHEREL 
2018 - 2021
TIS-2BÉtude pilote de faisabilité de la Technique de l’Insecte Stériles (TIS) appliquée à la lutte contre Aedes albopictus, vecteur du Chikungunya et de la dengue au Sud-ouest de l’Océan Indien
Project PI: Louis-Clément GOUAGNA (IRD)  
2020 - 2022

COSME Maximilien 2018 - 2021. Modèle discret d'agro-écosystèmes spatialisés. Ecole doctorale : GAIA / Université de Montpellier. Dir : GAUCHEREL Cédric

FLOTTERER Boris 2019 - 2022. Dynamique naturelle et aménagement durable de la forêt boréale : apports des modèles discrets pour caractériser les trajectoires. Ecole doctorale : Ecole Pratique des Hautes Etudes / Université PSL - EPHP. Dir : HELY-ALLEAUME Christelle / Co-dir. : GAUCHEREL Cédric

MATUSSE Américo 2019 - 2022. Modelling and analysis of plant-virus interaction in the co- infection of plants. Université de Pretoria, Afrique du Sud. Dir : CHAPWANYA Michael / Co-dir. : DUMONT Yves

THOMAS Colin 2019 - 2022. Analyse possibiliste de modèles discrets d’écosystèmes par des techniques symboliques. Ecole doctorale : Sciences et technologies de l'information et de la communication (STIC) - ED 580 / Université d'Évry-Val-d'Essonne. Dir : GAUCHEREL Cédric / Co-dir. : POMMEREAU Franck

PhD

2020

Theses

auteur
Myriam Djoukwe Tapi
titre
Mathematical modelling, analysis and simulations to improve the control of Miridae, a cocoa pest
article
Mathematics [math]. Université de Douala, 2020. English
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https://hal.inrae.fr/tel-03122705/file/The%CC%80se_Myriam_Tapi2020-1.pdf BibTex

Scientific papers

Publications HAL de la collection AMAP

2021

Journal articles

ref_biblio
Michael Chapwanya, Americo Matusse, Yves Dumont. On synergistic co-infection in crop diseases. The case of the Maize Lethal Necrosis Disease. Applied Mathematical Modelling, Elsevier, 2021, 90, pp.912-942. ⟨10.1016/j.apm.2020.09.036⟩. ⟨hal-02964242⟩
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Cédric Gaucherel, Camille Carpentier, Ilse R. Geijzendorffer, Camille Noûs, Franck Pommereau. Discrete-event models for conservation assessment of integrated ecosystems. Ecological Informatics, Elsevier, 2021, 61, pp.101205. ⟨10.1016/j.ecoinf.2020.101205⟩. ⟨hal-03039548⟩
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Robert Schneider, Tony Franceschini, Emmanuel Duchateau, Alexa Bérubé-Deschênes, Laurie Dupont-Leduc, et al.. Influencing plantation stand structure through close-to-nature silviculture. European Journal of Forest Research, Springer Verlag, In press, ⟨10.1007/s10342-020-01349-6⟩. ⟨hal-03109973⟩
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Ivric Valaire Yatat Djeumen, Yves Dumont, Anna Doizy, Pierre Couteron. A minimalistic model of vegetation physiognomies in the savanna biome. Ecological Modelling, 2021, 440, pp.109381. ⟨10.1016/j.ecolmodel.2020.109381⟩. ⟨hal-02570303⟩
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https://hal.archives-ouvertes.fr/hal-02570303/file/Bifurcation_Savanna_model_with_precipitation_and_fire_Preprint2020.pdf BibTex

2020

Journal articles

ref_biblio
Roumen Anguelov, Yves Dumont, Ivric Valaire Yatat Djeumen. Sustainable vector/pest control using the permanent sterile insect technique. Mathematical Methods in the Applied Sciences, Wiley, 2020, Special Issue: BIOMATH 2019, 43 (18), pp.10391 - 10412. ⟨10.1002/mma.6385⟩. ⟨hal-02545576⟩
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M. Soledad Aronna, Yves Dumont. On Nonlinear Pest/Vector Control via the Sterile Insect Technique: Impact of Residual Fertility. Bulletin of Mathematical Biology, Springer Verlag, 2020, 82 (8), ⟨10.1007/s11538-020-00790-3⟩. ⟨hal-02930114⟩
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Jacek Banasiak, Yves Dumont, Ivric Valaire Yatat Djeumen. Spreading Speeds and Traveling Waves for Monotone Systems of Impulsive Reaction–Diffusion Equations: Application to Tree–Grass Interactions in Fire-prone Savannas. Differential Equations and Dynamical Systems, 2020, ⟨10.1007/s12591-020-00552-6⟩. ⟨hal-02930082⟩
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https://hal.inrae.fr/hal-02930082/file/Banasiak2020_Article_SpreadingSpeedsAndTravelingWav-1.pdf BibTex
ref_biblio
Pierre-Alexandre Bliman, Daiver Cardona-Salgado, Yves Dumont, Olga Vasilieva. Optimal Control Approach for Implementation of Sterile Insect Techniques. Itogi Nauki i Tekhniki. Seriya "Sovremennaya Matematika i ee Prilozheniya. Tematicheskie Obzory", Viniti, 2020, 183, pp.35-51. ⟨hal-02418508⟩
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https://hal.inria.fr/hal-02418508/file/SIT_OC_BCDV_2019_v3.pdf BibTex
ref_biblio
M. Djoukwe Tapi, Leïla Bagny-Beilhe, Yves Dumont. Miridae control using sex-pheromone traps. Modeling, analysis and simulations. Nonlinear Analysis: Real World Applications, Elsevier, 2020, 54, pp.103082. ⟨10.1016/j.nonrwa.2019.103082⟩. ⟨hal-02432457⟩
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Cédric Gaucherel, F. Pommereau, Christelle Hély. Understanding Ecosystem Complexity via Application of a Process-Based State Space rather than a Potential Surface. Complexity, Wiley, 2020, 2020, pp.1-14. ⟨10.1155/2020/7163920⟩. ⟨hal-02974933⟩
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https://hal.archives-ouvertes.fr/hal-02974933/file/7163920.pdf BibTex
ref_biblio
J. Lamour, Olivier Naud, M. Léchaudel, Gilles Le Moguedec, James Taylor, et al.. Spatial analysis and mapping of banana crop properties: issues of the asynchronicity of the banana production and proposition of a statistical method to take it into account. Precision Agriculture, Springer Verlag, 2020, 21, pp.897-921. ⟨10.1007/s11119-019-09700-7⟩. ⟨hal-02492098⟩
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  • To the north
    • Fabien Michel (LIRMM, Montpellier, France),
    • Pierre-Alexandre Bliman (INRIA, Paris, France),
    • Franck Pommereau (Université d'Evry, Evry, France),
    • Suzanne Touzeau (INRA, LIRIMA, Nice, France),
    • Mustafa Tlidi (FNRS - U. Libre de Bruxelles, Belgique),
    • Edward J. Anthony (CEREGE, Coll. France, Aix-en-Provence, France)
  • To the south
    • Michael Chapwanya, Roumen Anguelov, Jacek Banasiak (University of Pretoria, South Africa),
    • Valaire Yatat (ENSP, U. de Yaoundé, Cameroun),
    • Olga Vasilieva (U. Del Valle, Cali, Colombia),
    • Maria Soledad Aronna (Fundaçion Gustavo Vargas, Brasil),
    • Frida Sidik (IMRO, Ministère Indonésien des Pêches et Affaires Maritimes, Indonésie)