Ecologie comparative des organismes, des communautés et des écosystèmes

Grégoire FRESCHET

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Grégoire T. Freschet

Chargé de recherche (CR2) CNRS

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Thèmes de recherche
Mes travaux de recherche portent sur les relations dynamiques existant entre les végétaux et leur environnement. Ils sont le résultat d’une approche fonctionnelle de l’écologie et abordent des aspects de l’écologie de la plante et de l’écologie des écosystèmes allant de l’échelle de l’organisme jusqu’à l’échelle globale.

Research interests
My research is primarily focused on the fluctuating relationships between plants and their above and belowground environments. It is based on a functional approach of ecology, and deals with aspects of ecology ranging from ecophysiology to ecosystem ecology.

Mes recherches s’articulent autour de quatre axes thématiques :

·         L’assemblage des communautés végétales et les réponses des plantes à leur environnement (variations interspécifiques et intraspécifiques, diversité des organes aériens et souterrains)

·         Les effets des plantes sur les cycles biogéochimiques dans les écosystèmes (décomposition des litières, stockage du carbone dans les sols, cycles des nutriments)

·         Le fonctionnement des écosystèmes en situation de changement d’usage des terres (liens quantitatifs existants entre la réponse des organismes à leur environnement et les effets de ces organismes sur leur environnement)

·         Les liens entre pratiques agro-écologiques et fonctionnement des agrosystèmes (communautés végétales en situation de changements environnementaux et en constante interaction avec les processus et propriétés des écosystèmes)


My research covers four main themes:

·         Plant community assembly and plant responses to their environment (interspecific and intraspecific variations, diversity of above and belowground plant organs)

·         Plant effects on ecosystem biogeochemical cycling (soil organic matter breakdown, carbon storage in soils, nutrient cycling)

·         Ecosystem functioning in conditions of land-use change (quantitative links between organism response to their environment and organism effects on their environment)

·         Links between agro-ecological practices and agro-system functioning (interaction between plant communities and specific environmental conditions)

 

Scientific publications

25.   Siefert A., Violle C., Chalmandrier L., Albert C.H., Taudière A., Fajado A. …, Freschet G.T., … Wright I. (2015) A global meta-analysis of the relative extent of intraspecific trait variation in plant communities. Ecology Letters, in press

24.   Freschet G.T., Swart E.M. & Cornelissen J.H.C. (2015) Integrated plant phenotypic responses to contrasting above and belowground resources: key roles of specific leaf area and root mass fraction. New Phytologist, 206: 1247-1260.

23.   Kumordzi B.B., de Bello F., Freschet G.T., Le Bagousse-Pinguet Y., Lepš J. & Wardle D.A. (2015) Linkage of plant trait space to successional age and species richness in boreal forest understorey vegetation. Journal of Ecology, 103, 1610-1620.

22.   Freschet G.T., Kichenin E. & Wardle D.A. (2015) Explaining within-community variation in plant biomass allocation: a balance between organ biomass and morphology above versus belowground? Journal of Vegetation Science, 26: 431-440.

21.   Lü X.-T., Freschet G.T., Kazakou E., Wang Z.-W., Zhou L.-S., & Han X.-G. (2015) Contrasting responses in leaf nutrient-use strategies of two dominant grass species along a 30-yr temperate steppe grazing exclusion chronosequence. Plant & Soil, 387: 69-79.

20.   Veen G.F., Freschet G.T., Ordonez A. & Wardle D.A. (2015) Litter quality and environmental controls of home-field advantage effects on litter decomposition. Oikos, 124: 187-195.

19.  Kumordzi B.B., Wardle D.A. & Freschet G.T. (2015) Plant assemblages do not respond homogenously to local variation in environmental conditions: functional responses differ with species identity and abundance. Journal of Vegetation Science, 26: 32-45.

18.   Moles, A.T., et al. (2014) Which is a better predictor of plant traits: temperature or precipitation? Journal of Vegetation Science, 25: 1167-1180.

17.   Freschet G.T., Östlund, L., Kichenin, E. & Wardle, D.A. (2014) Aboveground and belowground legacies of native Sami land-use on boreal forest in northern Sweden 100 y after abandonment. Ecology, 95, 963-977.

16.  Freschet G.T., Cornwell W.K., Wardle D.A., Elumeeva T.G., Liu W., Jackson B.G., Onipchenko V.G., Soudzilovskaia N.A., Tao J., Cornelissen J.H.C. (2013) Linking litter decomposition of above and belowground organs to plant-soil feedbacks worldwide. Journal of Ecology, 101, 943-952.

15.   Freschet G.T., Bellingham P.J., Lyver P.O’B., Bonner K.I., Wardle D.A. (2013) Plasticity in above- and belowground resource acquisition traits in response to single and multiple environmental factors in three tree species. Ecology & Evolution, 3, 1065-1078.

14.   Kichenin E., Wardle D.A., Peltzer D.A., Morse C.W., Freschet G.T. (2013) Contrasting effects of plant inter- and intraspecific variation on community-level trait measures along an environmental gradient. Functional Ecology, 27, 1254-1261.

13.   Freschet G.T., Aerts R., Cornelissen J.H.C. (2012) Multiple mechanisms for trait effects on litter decomposition: moving beyond home-field advantage with a new hypothesis. Journal of Ecology, 100, 619-630.

12.   Freschet G.T., Aerts R., Cornelissen J.H.C. (2012) A plant economics spectrum of litter decomposition. Functional Ecology, 26, 56-65.

11.   Freschet G.T., Weedon J.T., Aerts R., van Hal J.R., Cornelissen J.H.C. (2012) Interspecific differences in wood decay rates: insights from a new short-term method to study long-term wood decomposition. Journal of Ecology, 100, 161-170.

10.   Lü X.-T., Freschet G.T., Flynn D., Han X.-G. (2012) Plasticity in leaf and stem nutrient resorption proficiency potentially reinforces plant-soil feedbacks and micro-scale heterogeneity in a semi-arid grassland. Journal of Ecology, 100, 144-150.

9.     Cornelissen J.H.C. et al. (2012) Controls on coarse wood decay in temperate tree species: birth of the LOGLIFE experiment. Ambio, 40, 231-245.

8.     Freschet G.T., Dias A.T.C., Ackerly D.D., Aerts R., van Bodegom P.M., Cornwell W.K., Dong M., Kurokawa H., Liu G., Onipchenko V.G., Ordoñez J.C., Peltzer D.A., Richardson S.J., Shidakov I.I., Soudzilovskaia N.A., Tao J. & Cornelissen J.H.C. (2011) Global to community scale differences in the prevalence of convergent over divergent leaf trait distributions in plant assemblages. Global Ecology & Biogeography, 20, 755-765.

7.     Freschet G.T., Barthès B.G., Brunet D., Hien E., Masse D. (2011) The use of near infrared reflectance spectroscopy (NIRS) for predicting soil fertility and historical management. Communications in Soil Science & Plant Analysis, 42, 1692-1705.

6.     Kattge et al. (2011) TRY – a global database of plant traits. Global Change Biology, 17, 2905-2935.

5.     Freschet G.T., Cornelissen J.H.C., van Logtestijn R.S.P. & Aerts R. (2010). Substantial nutrient resorption from leaves, stems and roots in a sub-arctic flora: what is the link with other resource economics traits? New Phytologist, 186, 879-889.

4.     Freschet G.T., Cornelissen J.H.C., van Logtestijn R.S.P. & Aerts R. (2010). Evidence of the ‘plant economics spectrum’ in a subarctic flora. Journal of Ecology, 98, 362-373.

3.     Liu G., Freschet G.T., Pan X., Cornelissen J.H.C., Li Y. & Dong M. (2010) Coordinated variation in leaf and root traits across multiple spatial scales in Chinese semi-arid and arid ecosystems. New Phytologist, 188, 543–553.

2.     Freschet G.T., Masse D., Hien E., Sall S., Chotte J.-L. (2008). Long-term evolution of organic matter from manuring practice in a tropical cultivated soil and its consequences on soil ecosystem services. Agriculture, Ecosystems & Environment, 123, 175-184.

1.     Barthès B.G., Brunet D., Hien E., Enjalric F., Conche S., Freschet G.T., d'Annunzio R., Toucet-Louri J. (2008). Determining the distributions of soil carbon and nitrogen in particle size fractions using near-infrared reflectance spectrum of bulk soil samples. Soil Biology & Biochemistry, 40, 1533-1537.