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Xavier Lecomte

Biologist

Email: xlecomte@isa.ulisboa.pt

Biologist with proven experience in ecology and ecophysiology, I’m especially interested in management of natural and humanized landscape with a focus on species interactions and ecosystem services. I aim in understanding how ecosystems respond to environmental changes, human disturbances and global changes. I also aim in developing my experience on conservation and restoration strategies.

My PhD focused on the long-term effects of deer browsing on a Mediterranean shrub population dynamics, namely on shrub reproduction, carbon storage and aboveground fuel loading. This work also demonstrated how recurrent drought events affected these processes by increasing shrub mortality and recruitment and fire hazard.

Currently I am working in the “CERTFOR” project (Effects of forest certification on the conservation of cork oak woodlands), which is being led by Dr. Miguel Bugalho. The project aims to understand the effect of forest certification on cork oak woodland, namely on plants biodiversity and cover, tree regeneration, bird communities and incidence of pests and diseases.

Correia A.C., Abrantes M., Banza J., Bugalho M., Caldeira M.C., Carneiro M.,Jongen M., Lecomte X., Lobo-do-Vale R., Mateus J., Nogueira C., Pita G., Ramos M.L., Shvaleva A., Wingate L., Pereira J.S., 2009,

Respiração do solo em ecossistemas mediterrânicos: importância para o ciclo do carbono. Poster, 6º Congresso Florestal Nacional de 6-9 de Outubro de 2009, Ponta Delgada.

Lecomte X., Caldeira M.C., Bugalho M.N., Khatum F., Pereira J.S., 2008,

Effects of Mammalian Herbivory on the root morphology of Oak seedlings. Poster. International congress COST – European Cooperation in the field of Scientific and Technical Research - Action E38: Woody root processes, Lisboa, PORTUGAL

Bugalho, M., Lecomte, X., Pile, S., Caldeira, M.C., 2006, Efeitos do pastoreio por cervídeos na regeneração natural e composição florística de uma pastagem. Revista de Ciências Agrárias 29: 145-150.

Caldeira M.C., Nogueira C., Lecomte X., Moreira A., Bugalho M.N., Pereira J.S., 2006,

Canopy and herbaceous cover effect on insect defoliation of seedlings of cork and holm oak. Poster. ESA (Ecological Society of America) 91st Annual Meeting, Memphis, TN, USA

Caldeira M.C., Nogueira C., Lecomte X., Moreira A., Bugalho M.N., Pereira J.S., 2006,

Cork and holm oak seedling responses to canopy and herbaceous cover: 13C signature. Poster. BASIN/SIBAE stable isotope conference: Isotopes as Tracers of Ecological Change, Tomar, PORTUGAL

Caldeira M.C., Lecomte X., Nogueira C., Moreira A., Bugalho M.N., Pereira J.S., 2005,

Canopy and herbaceous cover effect on survival and growth of cork and holm oak. Poster. ESA (Ecological Society of America) 90th Annual Meeting and INTECOL IX International Congress of Ecology, Montreal, CANADA

Bugalho, M.N., Lecomte, X., Pile, S., Caldeira, M.C., 2004, Effects of deer on the natural regeneration of oaks and the botanical composition of a Mediterranean grassland. In: British Ecological Society Annual Meeting, September 2004, London, England. 

Bugalho, M.N., Lecomte, X., Caldeira M.C., & Ramos J.A., 2002, Do red deer select trees for rubbing?. In: V International Symposium on Deer Biology, Quebéc, Canada (Abstract).  

Lecomte X, Bugalho M, Catry FX, Fernandes P, Cera A, Caldeira M, 2024, Ungulates mitigate the effects of drought and shrub encroachment on the fire hazard of Mediterranean oak woodlands. Ecological Applications, e2971

(doi: http://doi.org/10.1002/eap.2971)

Lecomte, X., Bugalho, M.N., Catry, F.X., Fernandes, P.M., Cera, A., Caldeira, M.C., 2024, Ungulates mitigate the effects of drought and shrub encroachment on the fire hazard of M editerranean oak woodlands. Ecological Applications, e2971

(doi: 10.1002/eap.2971)

Mexia, T., Lecomte, X., Caldeira, M.C., Bugalho, M., 2022, Conservation zones increase habitat heterogeneity of certified Mediterranean oak woodlands. Forest Ecology and Management 504: 119811

(doi: 10.1016/j.foreco.2021.119811)

Bugalho, M.N., Lecomte, X., Caldeira, M.C., 2019, Ungulates affect ecosystem functioning and mediate biodiversity and ecosystem services in Mediterranean oak woodlands. In Embrapa Florestas (Eds.). Pesq.flor. bras. v. 39, Special issue - XXV IUFRO World Congress Abstracts. XXV IUFRO World Congress: Forest Research and Cooperation for Sustainable Development, Curitiba, Brazil, pp. 494.

Bugalho, M.N., Lecomte, X., Caldeira, M.C., 2019, Ungulates affect ecosystem functioning and mediate trade-offs between biodiversity and ecosystem services in Mediterranean woodlands. In Ecology Across Borders: Embedding Ecology in Sustainable Development Goals – Book of Abstracts.  15th EEF - European Ecological Federation Congress. Ecology across borders. Embedding ecology in sustainable development goals, Lisbon, 29th July-2nd August, pp. 493.

Caldeira, M.C., Lobo-do-Vale, R., Lecomte, X., David, T.S., Bugalho, M.N., Werner, C., 2019, Drought events and shrub encroachment reduce the functioning and resilience of water-limited ecosystems. In Embrapa Florestas (Eds.). Pesq.flor. bras. v. 39, Special issue - XXV IUFRO World Congress Abstracts. XXV IUFRO World Congress: Forest Research and Cooperation for Sustainable Development, Curitiba, Brazil, pp. 150.

Vaz, P.G., Bugalho, M.N., Fedriani, J.M., Branco, M., Lecomte, X., Nogueira, C., Caldeira, M.C., 2019, Unravelling associations between tree-seedling performance, herbivory, competition, and facilitation in high nature value farmlands. Journal of Environmental Management 232: 1066–1074

(doi: 10.1016/j.jenvman.2018.11.082)

Lecomte, X., Caldeira, M.C,, Catry, F.X., Fernandes, P.M., Jackson, R.B., Bugalho, M.N., 2018, Ungulates mediate tradeoffs in C storage and wildfire hazard in Mediterranean oak woodlands. Journal of Applied Ecology 56(3):699-710.

(doi: 10.1111/1365-2664.13310)

Caldeira, M.C., Lobo-do-Vale, R., Lecomte, X., David, T.S., Pinto, J., Bugalho, M.N., Werner, C, 2017, Drought and shrub invasion reduce transpiration and resilience of a Quercus suber ecosystem. In: XIV MEDECOS International Conference & XIII Asociación Española de Ecología Terrestre (AEET) Meeting – Human-Driven Scenarios for Evolutionary and Ecological Changes, 31 January 2017 - 4 February, Seville, Spain, pp. 73. [Download]

Lecomte, X., Caldeira, M.C., Bugalho, M.N., Fedriani, J.M., 2017, Combined effects of deer, mice and insect seed predation on the reproductive success of a Mediterranean shrub. Basic and Applied Ecology 21:45-54.

(doi: 10.1016/j.baae.2017.03.005)

Caldeira M., Lecomte X., David T., Pinto J., Bugalho M.N., Werner C., 2016, Extreme drought event and shrub invasion combine to reduce ecosystem functioning and resilience in water-limited climates. EGU General Assembly 2016, 17-22 April, Vienna AUSTRIA

Lecomte, X., Fedriani, J.M., Caldeira, M.C., Clemente, A.S., Olmi, A., Bugalho, M.N., 2016, Too Many Is Too Bad: Long-Term Net Negative Effects of High Density Ungulate Populations on a Dominant Mediterranean Shrub. PLoS ONE 11(7): e0158139.

(doi: 10.1371/journal.pone.0158139)

Caldeira, M.C., Lecomte, X., David, T.S., Pinto, J.G., Bugalho, M.N. & Werner, C., 2015, Synergy of extreme drought and shrub invasion reduce ecosystem functioning and resilience in water-limited climates. Scientific Reports 5: 15110.

(doi: 10.1038/srep15110)

Lecomte X., Horta A., Fangueiro D., Bugalho M., Caldeira M.C., 2014,

Soil nitrogen in shrub encroachment Mediterranean Oak ecosystems: Effects after Shrub clear-cut. Poster, 18th International Nitrogen Workshop “The Nitrogen Challenge”. 30th June-3rd July, Lisbon, PORTUGAL.

Nogueira C., McCulley R.L., Fangueiro D., Lecomte X., Bugalho M., Caldeira M.C., 2014,

Effect of nutrient addition on soil respiration in Mediterranean grassland. Poster, 18th International Nitrogen Workshop “The Nitrogen Challenge”. 30th June-3rd July, Lisbon, PORTUGAL

Bugalho, M.N., Lecomte X., Caldeira M.C.,. Rego F.C., 2013, Bugalho, M.N., Lecomte X., Caldeira M.C.,. Rego F.C. (2013). Long-term effects of grazing on the plant diversity and ecosystem functioning of a Mediterranean grassland. Oral presentation: 98th ESA Annual Convention, August 2013, Minneapolis, USA

Caldeira, M.C., David T., Lecomte X., Werner C., David J., Ryel, R.J., 2013,

Shrub encroachment effect on tree C assimilation and water use in a Mediterranean oak woodland. Oral presentation: 98th ESA Annual Convention, August 2013, Minneapolis, USA

Caldeira, M.C., Ibáñez, I., Nogueira, C., Bugalho, M.N., Lecomte, X., Moreira, A., Pereira, J.S., 2013, Direct and indirect effects of tree canopy facilitation in the recruitment of Mediterranean oaks. Journal of Applied Ecology 51(2):349-358.

(doi: 10.1111/1365-2664.12189)

Häusler M., Silva J.M.N., Cerasoli S., Lecomte X., Pereira J.M.C., 2013,

Using a radiative transfer model to simulate the impact of tree cover, leaf area index and greenness of herbaceous understory on MODIS based NDVI in Mediterranean cork oak woodland. In: COST Action ES0903 “EUROSPEC” Final Conference, 6th – 8th November 2013, Trento, ITALY

Correia, A.C., Minunnoa, F., Caldeira, M.C., Banza, J., Mateus, J., Carneiro, M., Wingatec, L., Shvalevad, A., Ramosa, A., Jongena, M., Bugalho, M.N., Nogueira, C., Lecomte, X. & Pereira, J.S., 2012, Soil water availability strongly modulates soil CO2 efflux in different Mediterranean ecosystems: Model calibration using the Bayesian approach. Agriculture Ecosystems and the Environment 161: 88-100.

(doi: 10.1016/j.agee.2012.07.025)

Fangueiro D., Caldeira M. C., Lecomte X., Coutinho J., 2012,

Influence of tree canopies on nitrogen dynamics in montado - a Portuguese Cork Oak Savanna. Poster, 17th International Nitrogen Workshop "Innovations for Sustainable Use of Nitrogen Resources", June 26-29, 2012, IRELAND

Jongen M, Unger S, Lecomte X, Pereira JS, 2012,

The impact of changes in the timing of precipitation on the herbaceous understorey of Mediterranean evergreen oak woodlands - Oral presentation, 97th annual meeting ESA, August 2012, Portland, USA

Ribeiro S, Caldeira MC, Lecomte X, Moura C, Martins AF, Costa SR, 2012,

Nematode communities and dynamics associated with shrub encroachment in Montado ecosystems. Poster, British Ecological Society: Aboveground belowground interactions, October 2012, London, UK

Unger S, Lecomte X, Pereira JS, Fangueiro D, Jongen M, 2012,

The impact of changes in the timing of precipitation on soil respiration and soil-N in Mediterranean evergreen oak woodlands – Oral presentation, 97th annual meeting ESA, August 2012, Portland, USA

Bugalho, M.N., Lecomte, X., Gonçalves, M., Caldeira, M.C. & Branco, M., 2011, Establishing grazing and grazing‐excluded patches increases plant and invertebrate diversity in a Mediterranean oak woodland. Forest Ecology and Management 261: 2133-2139.

(doi: 10.1016/j.foreco.2011.03.009)

Jongen M., Lecomte X., Pinto M., Pereira J. S., 2011,

The impact of changes in the timing of precipitation on the herbaceous understorey of Mediterranean evergreen oak woodlands. MEDECOS XII, Linking Science with Resource Management - Los Angeles, USA

Bugalho M.N , Lecomte X., Caldeira M.C., Gonçalves M., Branco M., 2010,

Coexistence of grazed and grazing excluded patches increases plant and invertebrate diversity in a Mediterranean oak woodland. Poster Ecological Society of America (ESA). Annual Meeting, Pittsburgh, USA

Caldeira M.C., Fangueiro D., Lecomte X., Bugalho M.N., Coutinho J., Pereira J.S., 2010,

Soil Microbial Biomass and Activity In A Cork Oak Savanna. Poster Ecological Society of America (ESA). Annual Meeting, Pittsburgh USA.

Costa Silva F., Jongen M., Ramos A., Lecomte X., Pereira J.S., 2010,

LTER Machoqueira do Grou – A unique cork oak woodland in Portugal. Poster, European IMMEC Meeting, London, UK

Jongen M., Lecomte X., Pereira J.S., 2010,

The impact of changes in the amount and timing of precipitation on the herbaceous understorey of Mediterranean evergreen oak woodlands. Poster European Geosciences Union General Assembly (EGU). Annual Meeting, Vienna, AUSTRIA

Caldeira M.C., Lecomte X., Nogueira C., Bugalho M., Pereira J.S., 2009,

Does tree canopy facilitate oak seedlings in a Mediterranean oak woodland? Poster British Ecological Society Symposium 2009: Facilitation in Plant Communities  University of Aberdeen, Scotland, UK

Caldeira, M.C., Pereira, J.S.P., Bugalho, M.N., Lecomte, X., 2009, Using stable isotopes to assess competition or facilitation of herbs and canopy cover on the survival of cork and hom oak seedlings. Annual Symposium of the British Ecological Society, Aberdeen, UK. (Poster presentation)

Correia A.C., Abrantes M., Banza J., Bugalho M., Caldeira M.C., Carneiro M.,Jongen M., Lecomte X., Lobo-do-Vale R., Mateus J., Nogueira C., Pita G., Ramos M.L., Shvaleva A., Wingate L., Pereira J.S., 2009,

Respiração do solo em ecossistemas mediterrânicos: importância para o ciclo do carbono. Poster, 6º Congresso Florestal Nacional de 6-9 de Outubro de 2009, Ponta Delgada.

Lecomte X., Caldeira M.C., Bugalho M.N., Khatum F., Pereira J.S., 2008,

Effects of Mammalian Herbivory on the root morphology of Oak seedlings. Poster. International congress COST – European Cooperation in the field of Scientific and Technical Research - Action E38: Woody root processes, Lisboa, PORTUGAL

Bugalho, M., Lecomte, X., Pile, S., Caldeira, M.C., 2006, Efeitos do pastoreio por cervídeos na regeneração natural e composição florística de uma pastagem. Revista de Ciências Agrárias 29: 145-150.

Caldeira M.C., Nogueira C., Lecomte X., Moreira A., Bugalho M.N., Pereira J.S., 2006,

Canopy and herbaceous cover effect on insect defoliation of seedlings of cork and holm oak. Poster. ESA (Ecological Society of America) 91st Annual Meeting, Memphis, TN, USA

Caldeira M.C., Nogueira C., Lecomte X., Moreira A., Bugalho M.N., Pereira J.S., 2006,

Cork and holm oak seedling responses to canopy and herbaceous cover: 13C signature. Poster. BASIN/SIBAE stable isotope conference: Isotopes as Tracers of Ecological Change, Tomar, PORTUGAL

Caldeira M.C., Lecomte X., Nogueira C., Moreira A., Bugalho M.N., Pereira J.S., 2005,

Canopy and herbaceous cover effect on survival and growth of cork and holm oak. Poster. ESA (Ecological Society of America) 90th Annual Meeting and INTECOL IX International Congress of Ecology, Montreal, CANADA

Bugalho, M.N., Lecomte, X., Pile, S., Caldeira, M.C., 2004, Effects of deer on the natural regeneration of oaks and the botanical composition of a Mediterranean grassland. In: British Ecological Society Annual Meeting, September 2004, London, England. 

Bugalho, M.N., Lecomte, X., Caldeira M.C., & Ramos J.A., 2002, Do red deer select trees for rubbing?. In: V International Symposium on Deer Biology, Quebéc, Canada (Abstract).  

Lecomte X, Bugalho M, Catry FX, Fernandes P, Cera A, Caldeira M, 2024, Ungulates mitigate the effects of drought and shrub encroachment on the fire hazard of Mediterranean oak woodlands. Ecological Applications, e2971

(doi: http://doi.org/10.1002/eap.2971)

Lecomte, X., Bugalho, M.N., Catry, F.X., Fernandes, P.M., Cera, A., Caldeira, M.C., 2024, Ungulates mitigate the effects of drought and shrub encroachment on the fire hazard of M editerranean oak woodlands. Ecological Applications, e2971

(doi: 10.1002/eap.2971)

Mexia, T., Lecomte, X., Caldeira, M.C., Bugalho, M., 2022, Conservation zones increase habitat heterogeneity of certified Mediterranean oak woodlands. Forest Ecology and Management 504: 119811

(doi: 10.1016/j.foreco.2021.119811)

Bugalho, M.N., Lecomte, X., Caldeira, M.C., 2019, Ungulates affect ecosystem functioning and mediate biodiversity and ecosystem services in Mediterranean oak woodlands. In Embrapa Florestas (Eds.). Pesq.flor. bras. v. 39, Special issue - XXV IUFRO World Congress Abstracts. XXV IUFRO World Congress: Forest Research and Cooperation for Sustainable Development, Curitiba, Brazil, pp. 494.

Bugalho, M.N., Lecomte, X., Caldeira, M.C., 2019, Ungulates affect ecosystem functioning and mediate trade-offs between biodiversity and ecosystem services in Mediterranean woodlands. In Ecology Across Borders: Embedding Ecology in Sustainable Development Goals – Book of Abstracts.  15th EEF - European Ecological Federation Congress. Ecology across borders. Embedding ecology in sustainable development goals, Lisbon, 29th July-2nd August, pp. 493.

Caldeira, M.C., Lobo-do-Vale, R., Lecomte, X., David, T.S., Bugalho, M.N., Werner, C., 2019, Drought events and shrub encroachment reduce the functioning and resilience of water-limited ecosystems. In Embrapa Florestas (Eds.). Pesq.flor. bras. v. 39, Special issue - XXV IUFRO World Congress Abstracts. XXV IUFRO World Congress: Forest Research and Cooperation for Sustainable Development, Curitiba, Brazil, pp. 150.

Vaz, P.G., Bugalho, M.N., Fedriani, J.M., Branco, M., Lecomte, X., Nogueira, C., Caldeira, M.C., 2019, Unravelling associations between tree-seedling performance, herbivory, competition, and facilitation in high nature value farmlands. Journal of Environmental Management 232: 1066–1074

(doi: 10.1016/j.jenvman.2018.11.082)

Lecomte, X., Caldeira, M.C,, Catry, F.X., Fernandes, P.M., Jackson, R.B., Bugalho, M.N., 2018, Ungulates mediate tradeoffs in C storage and wildfire hazard in Mediterranean oak woodlands. Journal of Applied Ecology 56(3):699-710.

(doi: 10.1111/1365-2664.13310)