Email: quentin.struelens < at > ird.fr
Supervisor: Dr Olivier DANGLES
Institutions: National Museum of Natural History (MNHN) / French National Research Institue for Sustainable Development (IRD)
Keywords: Ecology, Agroecology, Socio-ecosystem dynamics, Tropical Andes.
Title: Pest Management Across Scales: Insight From Mountainous Tropical Agroscapes.
Context: the tropical Andes is a world full of gradients that occur at several spatial scales. At the crop scale, a mosaic of spatial and temporal microclimates exists due to the high diversity of crop plants and the diel temperature changes. At the landscape scale, the diversities of land-management and land-use produce a gradient of landscape complexity. Finally, at the human-community scale, there is a wide diversity and combinations of human cultures related to historical contingency. This combination of abiotic-, biotic- and human-related gradients makes the tropical Andes an attractive playground for ecologists who are interested in understanding the effects and interactions of these drivers on agroecosystems.
Goal: I aim at identifying the drivers of pest control across these three spatial scales in order to propose practical solutions for the local farmer communities. Each chapter focuses on a specific scale, with its particular set of drivers of pest control.
Chapter 1: At the crop scale, temperatures vary tremendously both spatially and temporally, which impacts the development and emergence of pests. To cope with this highly fluctuating environment, we expect species to have developed a variety of developmental and phenological adaptations. We integrated, for the first time, slow-fast thermal strategies into a mechanistic predictive framework. The model calibrated with the observed individual thermal strategies showed a high accuracy in phenological predictions. This model can therefore be used to accurately predict the emergence of pests in the Andean context. Read more...
Chapter 2: At the landscape scale, we aim at identifying potential trade-offs and synergies between landscape characteristics and agrochemical use on insect diversity and functions. We are especially interested in the potentially opposite effect of these two drivers on arthropod pests and pollinators, which both ultimately influence crop yield.
Chapter 3: At the human-community scale, we aim at assessing whether agrochemical resellers are responsible for pesticide overuse in the Andes. Reseller knowledge on common pests and the quality of their recommendations will be evaluated.
Chapter 4: At the human-community and landscape scale, we aim at understanding how the perception of ecosystem services and the landscape can be influenced by the traditional knowledge of indigenous and non-indigenous farmers.
Altogether, these different chapters will provide new insights in several areas of natural and human sciences, along with practical solutions to be included into an integrated pest management program.
Struelens, Q., Rebaudo, F., Quispe, R., & Dangles, O. (2018). Thermal pace-of-life strategies improve phenological predictions in ectotherms. Scientific Reports, 8(1). https://doi.org/10.1038/s41598-018-34274-1
Rebaudo, F., Struelens, Q., & Dangles, O. (2018). Modelling temperature-dependent development rate and phenology in arthropods: The devRate package for r. Methods in Ecology and Evolution, 9(4), 1144‑1150. https://doi.org/10.1111/2041-210X.12935
Mina, D., Struelens, Q., Carpio, C., Rivera, M., Rebai, N., Rebaudo, F., & Dangles, O. (2017). Lupin Pest Management in the Ecuadorian Andes: Current Knowledge and Perspectives. Outlooks on Pest Management, 28(6), 250‑256. https://doi.org/10.1564/v28_dec_05
Struelens, Q., Gonzales Pomar, K., Loza Herrera, S., Nina Huanca, G., Dangles, O., & Rebaudo, F. (2017). Market access and community size influence pastoral management of native and exotic livestock species: A case study in communities of the Cordillera Real in Bolivia’s high Andean wetlands. PLOS ONE, 12(12), e0189409. https://doi.org/10.1371/journal.pone.0189409
Rebaudo, F., Struelens, Q., Callizaya Condori, F., & Quispe, R. (2017). Relationship between temperature and development rate of Copitarsia incommoda (Lepidoptera: Noctuidae) in the Bolivian Andes. Applied Entomology and Zoology, 52(2), 313‑320. https://doi.org/10.1007/s13355-017-0480-5
Visiting scholar at CNRS-CEFE
Associate researcher at Institute of Wetland Research, Chinese Academy of Forestry
Research Gate: https://www.researchgate.net/profile/Xu_Pan3
My research interests lie at the intersection of evolutionary biology, plant community ecology and ecosystem ecology. I am interested in exploring general patterns of plant communities, such as plant (species, functional and phylogenetic) diversity, plant coexistence and community assembly, and plant trait evolution and variation. I am also interested in examining the effects of plant diversity or interactions on the litter decomposition processes in various types of ecosystems, and discussing those issues in an evolutionary perspective.
Pan X, Ping Y, Cui L, et al. (2017) Plant Litter Submergence Affects the Water Quality of a Constructed Wetland. PLoS ONE, 12: e0171019.
Pan X, Berg MP, et al. (2015) Larger phylogenetic distances in litter mixtures: lower microbial biomass and higher C/N ratios but equal mass loss. Proceedings of the Royal Society B: Biological Sciences, 282: 20150103.
Pan X, Song YB, et al. (2015) Functional traits drive the contribution of solar radiation to leaf litter decomposition among multiple arid-zone species. Scientific reports, 5.
Pan X, Song YB, et al. (2015) Evolutionary position and leaf toughness control chemical transformation of litter, and drought reinforces this control: evidence from a common garden experiment across 48 species. PLoS ONE 10: e0143140.
Pan X, Cornelissen JH, et al. (2014) Experimental evidence that the Ornstein‐Uhlenbeck model best describes the evolution of leaf litter decomposability. Ecology and evolution, 4: 3339-3349.
Full publication list can be seen on my Research Gate.
Stagiaire de Licence 2
Écologie et Biologie des organismes (EBO)
Sujet de stage :
Caractériser la structure fonctionnelle et taxonomique des communautés de macroinvertébrés des écosystèmes forestiers dans le cadre du projet européen « SoilForEurope ». Le projet européen « SoilForEurope » étudie les traits de réponse et les traits d’effet des macroinvertébrés du sol pour prédire la réponse de ces communautés aux changements environnementaux et les possibles conséquences de ceux-ci sur les propriétés des écosystèmes forestiers.
Dans le cadre de ce stage j'ai réalisé différentes pesées et photographies sur des larves, des vers et des mollusques de 4 pays différents sur un gradient latitudinal à l’échelle européenne (Italie, Roumanie, Pologne, Finlande). Le but était d'obtenir les caractéristiques taxonomiques et fonctionnelles de ces macroinvertébrés soumis dans chacun de ces pays à l'influence de la diversité des arbres (expérimentation avec des forêts mono‐spécifiques contre un mélange de trois espèces d’arbres).
Mots clés : Écologie fonctionnelle, Changements environnementaux, Macroinvertébrés du sol, Écosystèmes forestiers.Encadrant : Pierre GANAULT
Name: Weixian Zeng
My Chinese research area is mainly about developing molecular methods to identify and quantify the fine roots species. Based on the molecular methods, I investigate belowground biodiversity and plant-soil feedbacks in field forests.And my research at CEFE mainly is focusing on an agricultural system. Specifically, my tasks will be to 1) quantify the impact of two earthworm functional groups (anecic and endogeic) on multiple root-related response variables, including but not limited to, root biomass, root traits, root decomposition, root mycorrhization, as well as root N allocation and 2) to test the importance of these root-related response variables on Ecotron-measured ecosystem greenhouse gases (CO2 , N2O and CH4) in an agricultural context.
Zeng W, Xiang W, Zhou B, Lei P, Zeng Y. 2017. Measurement of belowground diversity of fine roots in subtropical forests based on a quantitative real-time PCR (qPCR) method. Plant and Soil 420: 530-552.
Zeng W, Zhou B, Lei P, Zeng Y, Liu Y, Liu C, Xiang W. 2015. A molecular method to identify species of fine roots and to predict the proportion of a species in mixed samples in subtropical forests. Frontiers in Plant Science 6:313.
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