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Profil de Romain WALCKER

WALCKER Romain

Email : romain.walckerSPAMFILTER@univ-tlse3.fr

Téléphone / phone: +33-(0)5-61-55-89-27

Bureau / office : 336

Institution : UPS

Statut / status: ITA

Adresse professionnelle / address:

ECOLAB
Université Paul Sabatier
Bât. 4R1, Bureau 336, 118 route de Narbonne
31062 TOULOUSE CEDEX 9, France

Site perso / personal website :
http://www.researchgate.net/profile/Romain_Walcker

Research engineer

PhD in Ecology and Geosciences (2015)

Master degree in GIS and remote sensing (2004)

My research focuses on spatial and temporal patterns in the dynamic of ecosystem structures and functions. In particular, I focus on the impact of the global change on ecosystem services provided by mangroves (coastal defense, carbon cyclcing, nurseries, nutrient retention and water quality improvement). I investigate these questions integrating a range of field-based and remote sensing techniques:

  • Remote sensing
  • Geographical Information Systems
  • Differential Global Positioning Systems
  • Protocols for the measurement, monitoring and reporting of structure, biomass and carbon stocks
  • 2019 Coordinator of the MANGROVE(S) summer school (CNRS) to be held in summer 2020 in French Guiana.

2018 Project coordinator CNRS Pépinière Interdisciplinaire de Guyane (PIG): Spatial & temporal dynamics in mangrove carbon pools (STEM-2).

2018-2022 Coordinator Task 5 GDR CNRS LiG@ "Origin, stock, fate and dynamic of the coastal carbon in French Guiana" https://gdr-liga.fr/

2016 Project coordinator CNRS Pépinière Interdisciplinaire de Guyane (PIG): Spatial & temporal dynamics in mangrove carbon pools (STEM).

2014-2018 Coordinator Task 5 GDR CNRS LiG@ "Methods, tools and models" https://gdr-liga.fr/

Main/Recent publications

PUBLICATIONS

2019

  • Fromard, F., Walcker, R., Gardel, A. « Les pieds dans la mangrove de l'Oyapock », in Nicolas Arnaud & Stéphanie Thiébault (sous la direction de), L'atlas des nouveaux mondes, Paris, Le Cherche Midi, « Collection CNRS », 2019, 175 p., 100-101.
  • Walcker, R., Laplanche, C., Herteman, M., Lambs, L., Fromard, F. (2019) Damages caused by hurricane Irma in the human-degraded mangroves of Saint Martin (Caribbean). Scientific Reports 9, 18971.  https://doi.org/10.1038/s41598-019-55393-3
  • Wendling, V., Peugeot, C., Garcia Mayor, A., Hiernaux, P., Mougin, E., Grippa, M., Kergoat, L., Walcker, R., Galle, S. and Lebel, T. (2019) Drought induced regime shift and resilience of a Sahelian eco-hydrosystem. Environmental Research Letters 14, 105005.  https://doi.org/10.1088/1748-9326/ab3dde.
  • Proisy, C., Walcker, R., Blanchard, E., Gardel, A., Anthony, E. J. "Mangroves: a natural early warning system on erosion of open muddy coasts in French Guiana". In Friess, D. & Sidik, F. (Eds.), Dynamic Sedimentary Environment of Mangrove Coasts, Chapter X, XXXX. (Submitted).
  • Leflaive, J., Capdeville, C., Rols, J.-L., Fromard, F., Abdallah, K. & Walcker, R. (2019) Contrasted resistance and resilience of two mangrove forests after exposure to long-term and short-term anthropic disturbances. Marine Environmental Research 146, 12–23. https://doi.org/10.1016/j.marenvres.2019.03.002
  • Corenblit, D., Roussel, E., Steiger, J., and Walcker, R. (2019) A bivariate model for estimating reciprocal causality within biogeomorphic ecosystems: The cross‐lagged panel model. Earth Surf. Process. Landforms 44, 667–671. https://doi.org/10.1002/esp.4535.

2018

  • Bassirou Diop, Nicolas Sanz, Fabian Blanchard, Romain Walcker & Antoine Gardel (2018) The role of mangrove in the French Guiana shrimp fishery, Journal of Environmental Economics and Policy, DOI: 10.1080/21606544.2018.1522601
  • Ray, R., Michaud, E., Aller, R. C., Vantrepotte, V., Gleixner, G.,Walcker, R., Devesa J., Le Goff, M., Morvan, S., Thouzeau, G. (2018). The sources and distribution of carbon (DOC, POC, DIC) in a mangrove dominated estuary (French Guiana, South America). Biogeochemistry138, 297–321. https://doi.org/10.1007/s10533-018-0447-9
  • Walcker, R., Gandois, L., Proisy, C., Corenblit, D., Mougin, É., Laplanche, C., Ray, R. and Fromard, F. (2018). Control of ‘blue carbon’ storage by mangrove ageing: evidence from a 66-year chronosequence in French Guiana. Global Change Biology24, 2325–2338.  https://doi.org/10.1111/gcb.14100
  • Trichon V, Hiernaux P, Walcker R, Mougin E. The persistent decline of patterned woody vegetation: The tiger bush in the context of the regional Sahel greening trend (2018). Global Change Biology 00:1–16. https://doi.org/10.1111/gcb.14059
  • Walcker, R.,« Sur la piste du carbone bleu », in François Fromard, Emma Michaud & Martine Hossaert-McKey (sous la direction de), Mangrove, une forêt dans la mer, Paris, Le Cherche Midi, « Collection CNRS », 2018, 168 p., 69-89.

2016

  • Proisy, C., Degenne, P., Anthony, E.J., Berger, U., Blanchard, E., Fromard, F., Gardel, A., Olagoke, A., Santos, V.F., Walcker, R., & Lo Seen, D. (2016). A multiscale simulation approach for linking mangrove dynamics to coastal processes using remote sensing observations. In: Vila-Concejo, A.; Bruce, E.; Kennedy, D.M., and McCarroll, R.J. (eds.), Proceedings of the 14th International Coastal Symposium (Sydney, Australia). Journal of Coastal Research, Special Issue, No. 75, pp. 810-814. Coconut Creek (Florida), ISSN 0749-0208.
  • Walcker R.,Anthony E. J., Gratiot N., «Remote Sensing-based Monitoring of the Muddy Mangrove Coastline of French Guiana», In Baghdadi N.N. et Zribi M. (Eds.), Land Surface Remote Sensing in Urban and Coastal Areas, Chapter 8, 2016. ISTE Editions, Paris.
  • Amadou, B.,Walcker, R., Bouju, S. Représentation de l’espace pastoral et pratiques de pâture dans la périphérie du Parc du W au Niger. In : Bouju, S. (eds) La gestion des ressources du local au global : pratiques agro-sylvo-pastorales et impacts des politiques publiques, Chapitre 6, 2016. Editions PUBLISUD, Paris.

2015

  • Walcker R.« Dynamique spatiale de la mangrove de Guyane entre 1950 et 2014: forçage atmosphérique et conséquence pour le stock de carbone côtier », Thèse de doctorat en Écologie Fonctionnelle, sous la direction de F. Fromard et E. J. Anthony, Toulouse, Université Paul Sabatier, 2015, 159p. https://hal.archives-ouvertes.fr/tel-01297562
  • Corenblit D., Baas, A., Balke, T., Bouma, T., Fromard, F., Garófano-Gómez, V., González, E., Gurnell, A. M., Hortobágyi, B., Julien, F., Kim, D., Lambs, L., Stallins, J. A., Steiger, J., Tabacchi, E. & Walcker, R. (2015) Engineer pioneer plants respond to and affect geomorphic constraints similarly along water-terrestrial interfaces worldwide. Global Ecology and Biogeography 24, 1363–1376.
  • Walcker R., Anthony E. J., Cassou C., Aller R. C., Gardel A., Proisy C., Martinez J-M. & Fromard F. (2015) Fluctuations in the extent of mangroves driven by multi-decadal changes in North Atlantic waves. Journal of Biogeography 42, 2209-2219.
  • Dutrieux, E., Proisy, C., Fromard, F., Walcker, R., Ilman, M., Pwlowski, F., Ferdiansyah, H. & Ponthieux, O. (2014) Mangrove restoration in the vicinity of oil and gas facilities: Lessons learned from a large-scale project. SPE International Conference on Health, Safety, and Environment, 17-19 March, Long Beach, California, USA.

2012

  • Anthony, E.J., Gardel, A., Proisy, C., Fromard, F., Gensac, E., Peron, C., Walcker, R., Lesourd, S. (2012) The role of fluvial sediment supply and river-mouth hydrology in the dynamics of the muddy, Amazon-dominated Amapá-Guianas coast, South America: A 3-point research agenda. Journal of South American Earth Sciences 44, 18-24.

COMMUNICATIONS

2019

  • Walcker, R., Laplanche, C., Herteman, M., Lambs, L., Fromard, F. (2019) Preliminary Assessment of Mangrove Damages Caused by Hurricane Irma (2017) in the Saint Martin Island (west Indies). Poster presented at: Mangrove, macrobenthos & management 2019. July 1, Singapore.
  • Wendling, V., Peugeot, C., Garcia Mayor, A., Hiernaux, P., Mougin, E.,Walcker, R., Grippa, M., Kergoat, L., Lebel, T. (2019) Small scale eco-hydrological regime shifts and impacts on regional changes in the Sahel. Oral presentation at: EGU General Assembly, session Climate tipping points, critical thresholds and ecosystem resilience. Apr. 7-12 2019, Vienna, Austria.

2018

  • Walcker, R. (2018) Mangroves des forêts amazoniennes de Guyane : des forêts sur vases migrantes. Oral presentation at: Amazonia symposium 2018. June 21, Toulouse.

2015

  • Walcker, R., Anthony, E. J., Cassou, C., Aller, R. C., Gardel, A., Proisy, C., Martinez, J.-M. & Fromard, F. (2015), Fluctuations in the extent of mangroves of French Guiana driven by multi-decadal changes in North Atlantic climate. Littoral de Guyane sous influence amazonienne. Oral presentation at: LiGA Workshop. Nov. 24-28 2015, Cayenne, French Guiana.
  • Walcker, R. & Fromard, F. (2015), Control of mangrove abundance by decadal changes in oceanic wave fields. Poster presentation at: Our Common Future Under Climate Change - International Scientific Conference. July 7-10 Paris, France.
  • Fromard, F., Gardel, A., Proisy, C., Anthony, E. J.,Walcker, R. (2015), Human threats and climate change impacts on mangrove ecosystems. Poster presentation at: Our Common Future Under Climate Change - International Scientific Conference. July 7-10 Paris, France.

2011

  • Walcker, R., Fromard, F., Anthony, E. J., Gardel, A. & Proisy, C. (2011) Significant control of mangrove changes by trade-wind generated waves over the last 60 years in French Guiana. Poster presentation at:  Vulnerability of coastal ecosystems to global change and extreme events. Oct. 18-21 2011, Biarritz, France.
  • Walcker, R., Fromard, F., Proisy, C., Gardel, A., Anthony, E. J. (2011), Suivi du trait de côte en Guyane Française. Journées Observatoires Trait de Côte .Poster, 22-23 novembre 2011, Paris, France.
  • Blanchard, E., Proisy, C., Anthony, E. J., Fromard, F., Gardel, A., Gensac, E. & Walcker, R. (2011). Suivi de la dynamique de biomasse des mangroves dans un contexte de changements côtiers intenses. Cas du littoral guyanais. Vulnerability of coastal ecosystems to global change and extreme events. 18-21 oct. 2011, Biarritz, France.
  • Proisy, C., Ferreira dos Santos, V., Walfir Souza Filho, P. W., da Rocha Nascimento Junior, W., Machado da Silveira, O. F., Vieira da Silva, M., Anthony, E. J., Blanchard, B., Fromard, F., Gardel, A., Gensac, E. & Walcker, R. (2011). Dispersal of the Amazon mud along Pará, Amapá and French Guiana coasts: evidence of impacts on mangrove ecosystems dynamics and consequences for multi-scale interdisciplinary research. IVth Scientific Meeting of the ORE-HYBAM. Lima, Peru.
  • Anthony, E. J., Gardel, A., Gensac, E., Proisy, C., Lesourd, S., Fromard, F. & Walcker, R.(2011). An overview of morpho-sedimentary processes on the Amazon-influenced Amapa-Guianas coast, South America. IVth Scientific Meeting of the ORE-HYBAM. 6-9 Sept. 2011, Lima, Peru.

2010

  • Fromard, F.,Walcker, R., Gardel, A., Proisy, C., Gensac, E., Brutier, L., Anthony, E. J. (2010), Côtes guyanaises sous in¬uences amazoniennes : caractérisation des forçages et propositions de modélisation. Colloque de restitution EC2CO. 25 Nov. 2010, Toulouse, France.

Ongoing

2017-2022 French Agency of the Biodiversity: mangroves working group for the « French water framework directive ». Held position: Field work, Remote sensing & GIS. Region: French Guiana, Martinique, Guadeloupe, Mayotte (French overseas).

2014-2018 CNRS French Research Network « Coast of French Guiana under the Amazonian influence ». Held position: Coordinator task 5. Region: French Guiana.

Completed

2016/2018 Multidisciplinary research project PEPS INEE-CNRS « Spatial & Temporal dynamics in Mangrove carbon stores (STeM) ». Held position: Project Coordinator, field work, Remote sensing & GIS,. Region: French Guiana.

2014 Survey of the estuarial environment of the Oyapok Bay (CNRS INEE). Held position: Field work, Remote sensing & GIS. Region: French Guiana.

2012-2014 French National Research Program (ANR) BIOMANGO. Held position: Field work, Remote sensing. Region: French Guiana. http://www.agence-nationale-recherche.fr/?Projet=ANR-12-JSV7-0012

2011-2014 Mangrove expertise for a firm of engineering consultants (CREOCEAN). Held position: Field work, Remote sensing & GIS, Mapping. Region: Mahakam delta (Indonesia).

2012 GIS and mapping expertise for a firm of engineering consultants (IMPACT MER). Held position: Remote sensing & GIS, Mapping. Region: Martinique (French overseas).

2010-2011 Mangrove expertise for a firm of engineering consultants (IMPACT MER). Held position: Field work, Remote sensing & GIS, Mapping. Region: Saint Martin (French overseas).

2010-2012 French National R&D Program Aerospace Valley (FUI) Infolittoral-1. Held position: Remote sensing & GIS developments. Task coordinator: Mangrove shoreline. Region: French Guiana.

2009-2011 French National Research Program “EC2CO” (CNRS INSU). Held position: Field work, Remote sensing & GIS, Mapping. Region: French Guiana.

2007-2010 French National Research Program “Ingénierie Ecologique” (CNRS). Held position: Field work, Remote sensing & GIS, Mapping. Region: Mayotte Island (French overseas)

Geographical Information systems (ArcGis), Master 2 IDEA, University Paul Sabatier / Institut National Polytechnique de Toulouse.

Geographical Information systems (ArcGis), Mastère MSEI, Institut National Polytechnique de Toulouse / École National de Météorologie.

Geographical Information systems (MapInfo), Licence 3 BOPE, University Paul Sabatier.

Geographical Information systems (QGis), Master I BEE, University Paul Sabatier.

Geographical Information systems (QGis),Licence 3 BOPE, University Paul Sabatier.

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