Ponencias

1.-95th Ecological Society of America Annual Meeting NET ECOSYSTEM CO2 EXCHANGE AMONG CONTRASTING LAND-USES TYPES IN THE SEMIARID SHORT-GRASS STEPPE IN CENTRAL MEXICO , , E.U.A.. August 2010

2.-Congreso mexicano de Ecología MANEJO DE SERVICIOS DE SOPORTE EN SISTEMAS COMPLEJOS DE USO/TENENCIA DE LA TIERRA - EL RETO EN EL CICLO DE CARBONOEN PASTIZALES SEMIARIDOS , , México. November 2008

3.-Congreso mexicano de Ecología DINAMICA DE AGUA EN SUELO ASOCIADO A LAS ESPECIES PREDOMINANTES DE UN PASTIZAL SEMIARIDO DETERIORADO EN LOS LLANOS DE OJUELOS , , México. November 2008

4.-92nd Ecological Society of America Meeting NITROGEN MINERALIZATION IN RESPONSE TO A WATER PULSE: THE ROLE OF PHENOTYPIC DIFFERENCES IN PLANT CARBON QUALITY IN BELOWGROUND PROCESSES , , E.U.A.. August 2007

5.-92nd Ecological Society of America Meeting COMPARISON OF SOIL CO2 EFFLUX FOR DIFFERENT PHENOTYPIC ASSEMBLAGES OF BOUTELOUA GRACILIS. , , E.U.A.. August 2007

6.-Congreso mexicano de Ecologia 2006 Fire as a amanagement tool to reduce undesirable grasses in semiarid grasslands - indirect effects on soil processes should not be overlooked Sociedad Cientifica Mexicana de Ecologia , Morelia, Michoacan, México. November 2006

7.-90th annual meeting Ecological Society of America Inter-American comparison of the genetic erosion of key species in overgrazed semiarid rangelands , Montreal, Canada. August 2005

8.-90th annual meeting Ecological society of America Soil water dynamics of model populations of Bouteloua gracilis differing in lignin content , Montreal, Canada. August 2005

9.-XVII International Botanical Congress Global change and genetic erosion of dominant and keystone species XVII IBC 2005, 731 p , Viena, Austria. July 2005

10.-Manejo estratégico de praderas y agostaderos Conceptos básicos y caracterización de agostaderos y pastizales , Ojuelos, Jalisco, México. June 2005

11.-1ra Reunión Nacional dela Red Mexicana de Estudios Ecológicos a Largo Plazo Estudios ecológicos a a largo plazo en ecosistemas de pastizal semiarido en el contexto de cambio de uso de suelo , Oaxaca, Oax, México. October 2004

12.-14th Annual Jornada Symposium GRACILIS - the needs and objectives of a research network , Las Cruces, New Mexico, E.U.A.. July 2004

13.-87 Meeting Ecological Society of America Biomass dilution in leaf growth zones of defoliated grasses: a possible atribute of grazing tolerance The Ecological Society of America , Tucson, Arizona, E.U.A.. August 2002

14.-Primer foro ambiental del IPICYT Rediseñando la restauración de pastizales degradados. IPICYT , San Luis Potosí, México. January 2002

15.-Reunión Nacional de Investigación Pecuaria 2001 Revegetación natural del pastizal mediano abierto: papel de la composición genética de la población y calidad de sitio. Gobierno del Estado de Chiapas , Tuxtla Gutierrez, Chiapas., México. January 2001

Posters

1.-.. IX Congreso Mexicano de Recursos Forestales EFECTO DE LA LLUVIA EN LA DESCOMPOSICIÓN DE LA HOJARASCA DE PINUS CEMBROIDES EN LA SIERRA SAN MIGUELITO, S.L.P , , México. November 2009

2.-International Long term ecological research meeting NET ECOSYSTEM EXCHANGE OF CARBON AND WATER VAPOR AMONG CONTRASTING LAND-USES TYPES IN THE SEMIARID SHORT-GRASS STEPPE IN CENTRAL MEXICO , , E.U.A.. August 2009

3.-92nd Ecological Society of America Meeting HYDROLOGICAL PROCESSES AS AFFECTED BY STAND COMPOSITION IN SEMIARID FOREST IN CENTRAL MEXICO , , E.U.A.. August 2007

4.-Global environmental change: Regional challenges. An earth system science partnership Differential control on soil carbon and water content among genotype assemblages of the shortgrass steppe key species Earth System Science Partnership-Open Science conference , Beijin, China, República Popular. November 2006

5.-Ecologia en una era de Globalización-Ecological Society of America Associations between grass species and soil biological crust affect C and N dynamics in a degradaded grassland ecosystem of Northern Mexico Memorias congreso, , Merida, Yucatan, México. January 2006

6.-Ecology in an era of globalization Grazing effects on root fungal symbionts and soil biogeochemical properties in semiarid grasslands of Central Mexico Resumenes congreso ESA , Merida, Yucatan, México. January 2006

7.-XVII International Botanical Congress Biodiversity decline as a consequence of overgrazing in semiarid grassland from Mexico XVII IBC 2005, 731p , Viena, Austria. July 2005

8.-89 th Annual meeting Ecological Society of America Genetic variability of two Bouteloua gracilis populations from sites with contrasting grazing histories following 20 years of exclosure 89th Anual meeting, Ecological Society of America , Portland, Oregon, E.U.A.. August 2004

9.-Land Open Science Conference Overgrazing as a factor of land use change in Central Mexico GCTE/LUCC 2003, pp C1.4 , Morelia, Michoacan, México. December 2003

10.-15th annual conference of the Society for Ecological Restoration International A regional analysis of land degradation an a basis for the selection of restoration sites in Central Mexico , Austin, Texas, E.U.A.. November 2003

11.-Applications of Stable Isotopes Techniques to Ecological Studies Carbon allocation to foraging roots of Lolium perenne L. after defoliation Northern Arizona University Press , Flagstaff, Arizona., E.U.A.. May 2002