My interest is to understand ecosystem functioning. We are losing species from all phyla in all ecosystems all around the world. However, the consequences of such loss for ecosystem functioning remain unpredictable. Understanding how species interact and how they are linked to their environment is a prerequisite to the understanding of ecosystem functioning and the consequences of species loss.
My Ph.D. was based on a tree Biodiversity Ecosystem Functioning experiment (BEF China), where I was focusing on tree-tree interaction effects on carbon cycling from forest productivity to soil carbon storage through its effects on microbial community and litter decomposition. I am doing this work as part of the TreeDì doctoral school which is aiming to understand tree – tree interactions in Chinese subtropical forest within the BEF China platform.
Following the latest results of my thesis, my current project SoilDivTemp is aiming to understand how vegetation diversity is modulating temperature and the consequences for soil functions at the global scale.
The SoilDivTemp project aims to quantify and understand the vegetation diversity buffering of soil temperature fluctuations. This project is based on the international SoilTemp consortium compiling soil temperature measurements from around the world, biomes and ecosystems.
The frequency and intensity of extreme climatic events, such as heatwaves and droughts, are increasing with global warming, threatening humanity and other life on Earth. For example, belowground communities and functions are highly sensitive to changes in microclimatic conditions (e.g., temperature and humidity, Gottschall et al., 2019; Cesarz et al., 2020). Yet, vegetation has shown its potential to mitigate external macroclimatic fluctuations by means of buffering processes, assuring smooth transitions between macro- and microclimatic conditions (de Frenne et al., 2019, 2021). Moreover, higher vegetation diversity has been shown to increase primary productivity and the length of the vegetation period (Huang et al., 2017, 2018; Sapijanskas et al., 2014). Therefore, vegetation diversity is expected to increase the macroclimate buffering effect and thus protect belowground communities and functions from dramatic external climatic changes (Gottschall et al., 2019). Here, we propose to quantify the effect of vegetation cover on climatic buffering across ecosystems and seasons using the SoilTemp database and remote-sensing measurements (e.g., NDVI, spectral diversity) as proxies of vegetation diversity. In addition, we propose to quantify the effect of vegetation diversity on climatic buffering across ecosystems across the globe using the SoilTemp database and associated vegetation surveys. In particular, we here aim to understand the mechanisms behind climate buffering of vegetation diversity by investigating the roles of primary productivity and vegetations' spatial and temporal complementarity.
Our main hypothesis is that plant diversity can buffer temperature fluctuations (Fig. 1) and extreme climatic events (Fig. 2), and therefore, reduce the effects of climate change on ecosystems. We are testing this hypothesis using both experiments where diversity is manipulated; such as BEF China and The Jena Experiment; and natural field measurements with the SoilTemp consortium datasets.
Figure 1: climate buffering by plant diversity
Figure 2: climatic extreme buffering by plant diversity
Beugnon, Rémy; Bu, Wensheng; Bruelheide, Helge; Davrinche, Andréa; Du, Jianqing; Haider, Sylvia; Kunz, Matthias; von Oheimb, Goddert; Perles-Garcia, Maria D.; Saadani, Mariem; Scholten, Thomas; Seitz, Steffen; Singavarapu, Bala; Trogisch, Stefan; Wang, Yanfen; Wubet, Tesfaye; Xue, Kai; Yang, Bo; Cesarz, Simone & Eisenhauer, Nico (under review): Abiotic and biotic drivers of scale-dependent tree trait effects on soil microbial biomass and soil carbon concentration. Ecological Monographs
Beugnon, Rémy; Eisenhauer, Nico; Bruelheide, Helge; Davrinche, Andréa; Du, Jianqing; Haider, Sylvia; Haehn, Georg; Saadani, Mariem; Singavarapu, Bala; Sünnemann, Marie; Thouvenot, Lise; Wang, Yanfen; Wubet, Tesfaye; Xue, Kai; Cesarz, Simone (under review): Tree diversity effects on litter decomposition are mediated by litterfall and microbial processes. Functional Ecology
Schnabel, Florian†; Beugnon, Rémy†; Bo, Yang†; Castro Izaguirre, Nadia Cristina; Cesarz, Simone; Eisenhauer, Nico; Garcia, Maria Dolores Perles; Haehn, Georg; Härdtle, Werner; Huang, Yuanyuan; Kunz, Matthias; Liu, Xiaojuan; Niklaus, Pascal A.; von Oheimb, Goddert; Pietsch, Katherina A.; Richter, Ronny; Schmid, Bernhard; Trogisch, Stefan; Wirth, Christian; Ma, Keping & Bruelheide Helge (in prep.): The role of tree species richness for temperature buffering below forest canopies.
Beugnon Rémy, Ladouceur Emma, Sünnemann Marie, Cesarz Simone, Eisenhauer Nico (2021). Diverse forests are cool: Promoting diverse forests to mitigate carbon emissions and climate change. Journal of Sustainable Agriculture and Environment. DOI: 10.1002/sae2.12005
Beugnon Rémy (2021). Ph.D. thesis: From trees to soil: microbial and spatial mediation of tree diversity effects on carbon cycling in subtropical Chinese forests. PDF
Beugnon Rémy, Du Jianqing, Cesarz Simone, Jurburg Stephanie D., Pang Zhe, Singavarapu Bala, Wubet Tesfaye, Xue Kai, Wang Yanfen, Eisenhauer Nico (2021). Tree diversity and soil chemical properties drive the linkages between soil microbial community and ecosystem functioning. ISME Communications (1). DOI: 10.1038/s43705-021-00040-0
Singavarapu Bala, Beugnon Rémy, Bruelheide Helge, Cesarz Simone, Du Jianqing, Eisenhauer Nico, Guo Liang-Dong, Nawaz Ali, Wang Yanfen, Xue Kai, Wubet Tesfaye (2021). Tree mycorrhizal type and tree diversity shape the forest soil microbiota. Environmental Microbiology. DOI: 10.1111/1462-2920.15690
Phillips Helen R. P., et al (2021). Global data on earthworm abundance, biomass, diversity and corresponding environmental properties. Scientific Data (8). DOI: 10.1038/s41597-021-00912-z
Thouvenot Lise, Ferlian Olga, Beugnon Rémy, Kuenne Tom, Lochner Alfred, Thakur Madhav P., Tueke Manfred, Eisenhauer Nico (2021). Do Invasive Earthworms Affect the Functional Traits of Native Plants?. Frontiers in Plant Science (12). DOI: 10.3389/fpls.2021.627573
Cesarz Simone, Schulz Annika Eva, Beugnon Rémy, Eisenhauer Nico (2019). Testing soil nematode extraction efficiency using different variations of the Baermann-funnel method. Soil Organisms (91). DOI: 10.25674/so91201
Beugnon Rémy, Steinauer Katja, Barnes Andrew D., Ebeling Anne, Roscher Christiane, Eisenhauer Nico (2019). Chapter Five - Plant functional trait identity and diversity effects on soil meso- and macrofauna in an experimental grassland. Advances in Ecological Research (61). DOI: 10.1016/bs.aecr.2019.06.004
July 2018 – March 2022
Position: doctoral research position
@: German Centre for Integrative Biodiversity Research, Experimental Interaction Ecology group, Leipzig, Germany
Focus: From trees to soil: microbial and spatial mediation of tree diversity effects on carbon cycling in subtropical Chinese forests.
January 2018 – June 2018
Position: Master’s student
@:BioDiCée lab, Institut des Sciences de l’Evolution de Montpellier (ISEM) – MONTPELLIER (France)
Focus: Modelling of non-trophic interactions effects on plants communities.
April 2017– July 2017
@: Swedish University of Agricultural Sciences (SLU) – UMEÅ (Sweden)
Focus: Root trait effects of alpine plant communities on plant-soil feedback effects performed in two greenhouse experiments.
Ph. D. Thesis
@: Leipzig University – LEIPZIG (Germany)
September 2017 – June 2018
Master’s degree in Biology, Ecology and Evolution (B2E-DARWIN)
@: Montpellier University – MONTPELLIER (France)
Focus: Fundamental Ecology, Functional Ecology, Climate change, Animal behaviour, Evolutive Biology, Biostatistics, Modelling.
February 2016 – June 2016
Erasmus exchange semester
@: SGGW - WULS – WARSAW (Poland)
Focus: Soil ecology, water microbiology, grassland ecology
September 2014 – November 2018
Agricultural engineering diploma
@: Montpellier SupAgro – MONTPELLIER (France)
Focus: With ecology lectures and laboratory technique practices
Cesarz, S., Craven, D., Auge, H., Bruelheide, H., Castagneyrol, B., Hector, A., Jactel, H., Koricheva, J., Messier, C., Muys, B., O’Brien, M. J., Paquette, A., Ponette, Q., Potvin, C., Reich, P. B., Scherer-Lorenzen, M., Smith, A. R., Verheyen, K., & Eisenhauer, N. (2020). Biotic and abiotic drivers of soil microbial functions across tree diversity experiments. BioRXiv. https://doi.org/10.1101/2020.01.30.927277
de Frenne, P., Lenoir, J., Luoto, M., Scheffers, B. R., Zellweger, F., Aalto, J., Ashcroft, M. B., Christiansen, D. M., Decocq, G., de Pauw, K., Govaert, S., Greiser, C., Gril, E., Hampe, A., Jucker, T., Klinges, D. H., Koelemeijer, I. A., Lembrechts, J. J., Marrec, R., … Hylander, K. (2021). Forest microclimates and climate change: Importance, drivers and future research agenda. Global Change Biology, 27(11), 2279–2297. https://doi.org/10.1111/gcb.15569
de Frenne, P., Zellweger, F., Rodríguez-Sánchez, F., Scheffers, B. R., Hylander, K., Luoto, M., Vellend, M., Verheyen, K., & Lenoir, J. (2019). Global buffering of temperatures under forest canopies. Ecology and Evolution, 3, 744–749.
Gottschall, F., Davids, S., Newiger-Dous, T. E., Auge, H., Cesarz, S., & Eisenhauer, N. (2019). Tree species identity determines wood decomposition via microclimatic effects. Ecology and Evolution, 9(21), 12113–12127. https://doi.org/10.1002/ece3.5665
Huang, Y., Chen, Y., Castro-Izaguirre, N., Baruffol, M., Brezzi, M., Lang, A., Li, Y., Härdtle, W., von Oheimb, G., Yang, X., Liu, X., Pei, K., Both, S., Yang, B., Eichenberg, D., Assmann, T., Bauhus, J., Behrens, T., Buscot, F., … Schmid, B. (2018). Impacts of species richness on productivity in a large-scale subtropical forest experiment. Science (New York, N.Y.), 362(6410), 80–83. https://doi.org/10.1126/science.aat6405
Huang, Y., Ma, Y., Zhao, K., Niklaus, P. A., Schmid, B., & He, J.-S. (2017). Positive effects of tree species diversity on litterfall quantity and quality along a secondary successional chronosequence in a subtropical forest. Journal of Plant Ecology, 10(1), 28–35. https://doi.org/10.1093/jpe/rtw115
Sapijanskas, J., Paquette, A., Potvin, C., Kunert, N., & Loreau, M. (2014). Tropical tree diversity enhances light capture through crown plasticity and spatial and temporal niche differences. Ecology, 95(9), 2479–2492. https://doi.org/10.1890/13-1366.1
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
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