Pascal MONESTIEZ
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Email : Pascal.Monestiez@avignon.inra.fr Tél: +33 (0)6.85.92.66.67 Research interests / Recent publications / PhD students / Teaching / Others Methodological developments in Geostatistics :
ANR projects :
Geostatistics for count data and spatial distributions of abundance : Spatial hierarchical Models Count data especially when they contain a large proportion of zeros, are always a methodological problem for geostatistics as well as for any other spatial data modelling. We propose a geostatistical approach that models the Poisson distributional nature of the counting process and significantly improves experimental variogram estimation, local mean prediction and error of prediction compared to classical ordinary kriging. This “Poisson kriging” is applied to fin whale count data recorded for 1993 to 2001 in the Northwestern Mediterranean Sea. Our approach is compared to Bayesian approaches introduced by Diggle et al. and developed by O. Christiensen, C Wilkle and others. Bellier, E., Monestiez, P. Certain, G. Chadoeuf, J. and V. Bretagnolle 2009. Modeling species distribution with count data: nested variography accounts for the hierarchical structure of animal distributions (submitted) E. Bellier and P. Monestiez, 2008. Model based block kriging to estimate spatial abundance of wildlife populations from count data. In Proceedings of the Eighth International Geostatistics Congress. Julian Ortiz & Xavier Emery (Eds.). GECAMIN. pp 119-128. ISBN:978-956-8504-18-2. Monestiez, P., Dubroca, L., Bonnin, E., Durbec, J-P., Guinet, C., 2006. Geostatistical modelling of spatial distribution of Balaenoptera physalus in the Northwestern Mediterranean Sea from sparse count data and heterogeneous observation efforts. Ecological Modelling 193:615-628. Monestiez, P., Dubroca, L., Bonnin, E., Durbec, J-P., Guinet, C., 2005. Comparison of model based geostatistical methods in ecology : application to fin whale spatial distribution in northwestern Mediterranean Sea. In Geostatistics Banff 2004, Leuangthong, O. and Deutsch, C. V. Eds, Springer, 777-786. Geostatistics on tree structures, river networks Classical geostatistical modelling can be extended to spatial supports as directed trees and applied to variables spatially structured along a river network. The topological properties of the tree structure imply specific model assumptions, proper variogram estimates and ad-hoc drift models. Once the covariance structure specified on the tree, kriging can be generalized for prediction. We also proposed a model-based simulation procedure to generate random functions on directed trees. Two case studies, fluvisol delineation for the Hérault river (South of France) and network properties of rural catchments, were explored. Clear spatial structures were exhibited and modelled using variogram based on upstream-downstream distance for both hydrographic networks. A drift was also modelled in both cases. This approach is presently extended to risk modelling of a disease whose pathogen is spread by water flow along a river network. Vincent Garreta, Pascal Monestiez and Jay M. Ver Hoef, 2009. Spatial modelling and prediction on river networks: up model, down model or hybrid ? Environmetrics (on line) Monestiez, P., Bailly J-S., Lagacherie P., Voltz M., 2005. Geostatistical modelling of spatial processes on directed trees : Application to fluvisol extent. Geoderma 128:179-191. Bailly, J-S., Monestiez, P., Lagacherie, P., 2006. Modelling spatial processes on directed trees with geostatistics : Application to artificial network properties on rural catchment areas. Mathematical Geology 38: 515-539.. .
Garreta, V., Monestiez P. and Jay M. Ver Hoef, 2009. Spatial modelling and prediction on river networks: up model, down model or hybrid ? Environmetrics (on line) * Bellier, E., Monestiez, P. Durbec, J-P. and Candau, J-N., 2007. Identifying spatial relationships at multiple scales : Principal coordinates of neighbour matrices (PCNM) and geostatistical approaches. Ecography Ecography 30, 385–399. * Bailleul, F., Charrassin, J-B, Monestiez, P., Roquet, F., Biuw, M.. and Guinet, Ch., 2007 - Successful foraging zones of southern elephant seals from Kerguelen Islands in relation to oceangraphic conditions. Phil. Trans. R. Soc. B 362, 2169-2181. * Bailly, J-S., Monestiez, P. and Lagacherie, P., 2006 - Modelling spatial processes on directed trees with geostatistics : Application to artificial network properties on rural catchment areas. Mathematical Geology 38: 515-539. * Gaba S., Chadoeuf J., Monestiez P., Sauve C., Cortet J. and Cabaret J., 2006. Estimation of abomasum strongyle nematode infections in sheep at necropsy: Tentative proposals for a simplified technique. Veterinary Parasitology 140: 105-113. Monestiez, P., Dubroca, L., Bonnin, E., Durbec, J-P., Guinet, C., 2006. Geostatistical modelling of spatial distribution of Balaenoptera physalus in the Northwestern Mediterranean Sea from sparse count data and heterogeneous observation efforts. Ecological Modelling 193:615-628. * Chadoeuf, J., Goulard M., Lefèvre F., Monestiez, P., Pichot C., 2006. Poisson non-stationnaire et échantillonnage semi-raréfié; comment les cèdres du Luberon envahissent-ils l'espace ? In Analyse statistiques des données spatiales. Saporta G., J.-J. and Lejeune M. Eds., Editions Technip, Paris. Monestiez, P., Dubroca, L., Bonnin, E., Durbec, J-P., Guinet, C., 2005. Comparison of model based geostatistical methods in ecology : application to fin whale spatial distribution in northwestern Mediterranean Sea. In Geostatistics Banff 2004, Leuangthong, O. and Deutsch, C. V. Eds, Springer, 777-786. * Monestiez, P., Bailly J-S., Lagacherie P., Voltz M., 2005. Geostatistical modelling of spatial processes on directed trees : Application to fluvisol extent. Geoderma 128:179-191. * Desassis, N., Monestiez, P., Bacro, J-N., Lagacherie, P., Robbez-Masson, J-M., 2005. Mapping unobserved factors on vine plant mortality. In Geostatistics for environmental applications, Renard Ph. et al. Eds, Springer, 125-136. Harmelin-Vivien M.L., Bitar G. , Harmelin J-G., Monestiez P., 2005. Importance of Lessepsian Red Sea immigrant species in the littoral fish community of the Lebanese rocky coast (eastern Mediterranean Sea). Biological invasions 7:625-637. * (*) For some references above, the pdf files cannot be available on Web and downloaded due to copyright policy, but they can be sent directly by the author. Ask for them at pascal.monestiez@avignon.inra.fr
Thesis title : Modélisation et inférence du lien entre deux variables à partir d'observations géoréférencées et hétérotopes.
Thesis title : Spatial distribution within hierarchical patch dynamics systems: identifying species-environment spatial relationships at multiscales. French title: Distributions et structures spatiales au sein de systèmes en patchs hiérarchiques dynamiques: mise en évidence des relations spatiales espèces-environnement à échelles multiples. Presently : Research Scientist at the Norwegian Institute for Nature Research NINA Postal address: NO-7485 Trondheim, NORWAY Delivery/Visiting address: Tungasletta 2, NO-7047 Trondheim, Norway Email: edwige.bellier@nina.no • Phone: +47 73 80 14 00 • Fax: +47 73 80 14 01 • www.nina.no SUPERVISION OF MASTER STUDENTS (2002-2009):
2006 : Vincent GARRETA : Modélisation statistique et distribution spatiale de variables environnementales le long d'un système hydrographique. Univ de Montpellier II. PhD student at the CEREGE, Aix-Marseille ( www.cerege.fr )
2005 : Stéphanie PEDRON : Distribution spatiale des éléphants de mer (Minounga leonida) en relation avec les conditions océanographiques de l'océan austral. Univ. de la Méditerranée.
2003 : Nicolas DESASSIS : Modélisation et analyse statistique des structures spatiales des phénomènes de dégradation des sols et du dépérissement de la vigne à différentes échelles. Univ de Montpellier II. (Research scientist et the ENSMP, Paris tech).
2003 : Emilie BONNIN : Modélisation géostatistique spatio-temporelle de la répartition du rorqual commun (Balaenoptera physalus) de Méditerranée Nord-Occidentale, Univ. de la Méditerranée. (cf. Monestiez et al., 2006, Ecological Modelling)
Instructeur National #117 (Course Director) from the FFESSM (Fédération Française d'Etudes et de Sports Sous-Marins - French Underwater Federation). |
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Rédacteur : Biometrie |
