Diciembre, 2018

Contreras, S., Werne, J.P., Araneda, A., Tejos, E., Moscoso, J. Abundance, distribution and stable carbon isotope composition of leaf-waxes (n-alkanes & fatty acids) from surface lake sediments along a climatological gradient on the western side of the Southern Andes. American Geophysical Union Fall Meeting 2018 – Washington DC, USA.

Scott, W.P., Contreras, S., Werne, J.P., Arnold, T.E. Hydrogen isotope compositions of plant leaf wax n-alkanoic acids across a latitudinal transect in southern South America. American Geophysical Union Fall Meeting 2018 – Washington DC, USA.

Jana, P., Araneda, A.,  Tejos, E., Fagel, N., Contreras, S. Finding the expression of MCA and LIA along a sediment core from northern Patagonia using fatty acids from leaf waxes. American Geophysical Union Fall Meeting 2018 – Washington DC, USA.

Noviembre, 2018

Cerda-Peña, C., Contreras, S., Rau, J. Intra-specific and inter-specific variations of leaf wax fatty acid from three plants in riparian ecosystem from temperate forest. Joint Conference on Forests and Water 2018 – Valdivia, Chile.

Mayo, 2018

Esguerra, D, Contreras, S., Lam, P. Comunidad zooplanctónica y microbiana bajo diferentes condiciones de surgencia en Chile central, Bahía de Concepción y Bahía Coliumo. Congreso de Ciencias del Mar, 2018 – Valdivia, Chile.

Ruiz, P.A., Contreras, S., Bascur, M., Guzmán, F., Quiroga, E., Urzúa, Á. Características bioquímicas de tres especies (Ctenodiscus australis (CA), Munida subrugosa (MS), Eleginops maclovinus (EM)) de la Bahía Yendegaia que describen la dinámica de las redes tróficas en los fiordos de Chile. Congreso de Ciencias del Mar, 2018 – Valdivia, Chile.

Ruiz, P.A., Contreras, S., Bascur, M., Guzmán, F., Quiroga, E., Urzúa, Á. Variación en la concentración de ácidos grasos esenciales presentes en tres especies (Ctenodiscus australis (CA), Munida subrugosa (MS), Eleginops maclovinus (EM)) de la Bahía Yendegaia para predecir a partir de su dieta el nivel trófico al que pertenecen. Congreso de Ciencias del Mar, 2018 – Valdivia, Chile.

Agosto, 2017

Contreras, S., Werne, J.P., Araneda, A. Distribution of plant wax derived n- alkanes and alkanoic acids from lacustrine sediments and climatology along the western side of the Andes. Goldschmidt, 2017 – París, Francia.

Mayo, 2017

Fuentes, C., Esguerra, D., Contreras, S., Pozo, K., Moscoso, J. Composición y Biomasa Zooplanctónica en el Golfo de Arauco Durante el Período Comprendido entre Otoño – Primavera 2016 y su Relación con Eventos de Surgencia. Congreso de Ciencias del Mar, 2017 – Valparaíso, Chile.

Abril, 2017

Placencia, J., Llanos, G., Contreras, S. Organic carbon sources across salinity gradients in Chilean Fjords: Reloncaví Fjord (~41ºS) and Southern Patagonian ice fields area (~48ºS).  EGU General Assembly, 2017 – Vienna, Austria.

Noviembre, 2016

Contreras, S., Werne, J.P., Araneda, A., Conejero, A.C. Evaluando el porcentaje e isótopos estables de carbono y nitrógeno orgánico total en sedimentos superficiales lacustres como indicadores de gradientes climáticos a lo largo de la costa oeste de Sudamérica. I Congreso Iberoamericano de Limnología y XIII Congreso de la Sociedad de Limnología 2016 – Valdivia, Chile.

Bustamante-Ortega, R., Contreras, S., Pino, Yazmin. Cuantificando del aporte terrígeno al Lago Lanalhue, Región del Biobío-Chile, mediante el uso de indicadores orgánicos e inorgánicos. I Congreso Iberoamericano de Limnología y XIII Congreso de la Sociedad de Limnología 2016 – Valdivia, Chile.

Enero, 2016

Pozo, K., Torres, M., Pribylova, P., Paredes, L., Contreras, S. Hidrocarburos Aromáticos en sedimentos superficiales de la Bahía Concepción, Chile. 32° Congreso Latinoamericano de Química CLAQ 2016, Talcahuano, Chile.

Diciembre, 2015

Contreras, S., Werne, J.P., Araneda, A., Conejero, A.C. Evaluating carbon isotope signature of bulk organic matter and plant wax derived n-alkanes from lacustrine sediments as climate proxies along the western side of the Andes. American Geophysical Union Fall Meeting 2015 – San Francisco, California, USA.

Diciembre, 2014

Contreras, S., Werne, J.P., Brown, E.T., Halbur J., R., Sinninghe Damsté, J., Schouten, S., Correa-Metrio, A., Fawcett, P.J. Evaluating spatial heterogeneity and environmental variability inferred from branched glycerol dialkyl glycerol tetraethers (GDGTs) distribution in soils from Valles Caldera, New Mexico. American Geophysical Union Fall Meeting 2014 – San Francisco, California, USA.

Diciembre, 2012

Contreras, S., Werne, J.P., Brown, E.T., Scott Anderson, R., Fawcett, P.J. Tracking millennial-scale climate variability through the Marine Isotope Stage (MIS) 12 using terrigenous biomarkers in lacustrine sediments from Valles Caldera, New Mexico, USA. American Geophysical Union Fall Meeting 2012 – San Francisco, California, USA.

Werne, J.P., Halbur, J., Contreras, S., Caballero, M., Lozano, S., Correa, A., Fawcett, P.J. Complexities in the use of branched GDGT based temperature reconstruction: Case studies from the southwest USA and Mexico. American Geophysical Union Fall Meeting 2012 – San Francisco, California, USA.

Noviembre, 2012

Werne, J.P., Johnson, T.C., Abbott, A., Berke, M., Contreras, S., Halbur, J., Brown, E.T., Schouten, S., Sinninghe Damste, J.S. A 1.2 MA history of temperature and hydroclimate in the Lake Malawi Basin. The Geological Society of America (GSA) Annual Meeting and Exposition 2012 – Charlotte, North Carolina, USA.

Aogosto, 2012

Contreras, S., Werne, J.P., Brown, E.T., Scott Anderson, R., Fawcett, P.J. Tracking millennial-scale climate variability through the Marine Isotope Stage (MIS) 12 using terrigenous biomarkers in lacustrine sediments from Valles Caldera, New Mexico, USA. Gordon Research Conferences in Organic Geochemistry – Holderness, New Hampshire, USA.

Diciembre, 2011

Contreras, S., Werne, J.P., Brown, E.T., Scott Anderson, R., Fawcett, P.J. Climate variability during the Marine Isotope Stage (MIS) 12-11 transition recorded in lacustrine sediments from Valles Caldera, New Mexico, USA. American Geophysical Union Fall Meeting 2011 – San Francisco, California, USA.

Fawcett, P.J., Brown, E.T., Werne, J.P., Contreras, S., Scott Anderson, R., Dodd, J.P., Sharp, Z.D., Heikoop, J.M., Allen, C.D. Millennial-scale climate variability during a mid-Pleistocene glacial (MIS 12) from a terrestrial record in the Valles Caldera, New Mexico. American Geophysical Union Fall Meeting 2011 – San Francisco, California, USA.

Agosto, 2011

Meister, P., Contreras, S., Liu, B., Khalili, A., Ferdelman, T.G., Kuypers, M., Jørgensen, B.B. Dynamic subsurface biosphere fuelled by organic matter from the past. Goldschmidt Conference 2011 – “Earth, life and fire”, Prague, Czech Republic

Diciembre, 2010

Kalvelage, T., Contreras, S., Paulmier, A., LaRoche, J., Stramma, L., Frank, M., Lavik, G., Kuypers, M.M.M. Extent and oxygen control of pelagic nutrient removal in the OMZ off Peru. American Geophysical Union Fall Meeting 2010 – San Francisco, California, USA.

Junio, 2009

Rincón-Martinez, D., Contreras, S., Lamy, F., Tiedemann, R. Are glacials (interglacial) in the easternmost Pacific Ocean drier (wetter) during the last 300 000 years? Goldschmidt Conference 2009 – “Challenges to Our volatile Planet”, Davos, Switzerland.

Mayo, 2004

Sepúlveda, J., Pantoja, S., Hughen, K., Lange, C., Gonzalez, F., Muñoz, P., Rebolledo, L., Castro, R., Contreras, S., Avila, A., Rossel, P., Lorca, G., Salamanca, M. and Silva, N. 2005. Export productivity over the last century from sediments of Canal Puyuhuapi (44°S). XXI National meeting of Marine Sciences, University of Valparaíso, Valparaíso, Chile.

Mayo, 2001

Ahumada R., Rudolph, A. & Contreras, S. Heavy metals content (Zn, Co, Ni, Ba, Cr, V, Cu, Sr, Pb and Cd) in the Magallanes Strait, Chile”. XXI National meeting of Marine Sciences, University of Valparaíso, Valparaíso, Chile.

Octubre, 2000

Gay Mitchelson-Jacob & Sergio Contreras Quintana “Optical variability in Concepción Bay, Chile. From in situ and satellite measurements”. Oceans from Space, Venice 2000, Venice, Italy.

Octubre, 1998

Ahumada R., Rudolph, A., Pérez, C. & Contreras, S. “Methodological aspects to evaluate the impact produced by the sewage of organic matter in to a body water”. IV Meeting of analytical and environmental chemistry, Católica del Norte University, Antofagasta, Chile.

Mayo, 1998

Ahumada R. & Contreras, S. 1998. “Trace metal contents (Zn, Co, Ni, Ba, Cr, V, Cu, Sr, Pb and Cd) in the fjord’s region from Campos de Hielo Sur”. XVIII National meeting of Marine Sciences, Arturo Prat University, Iquique, Chile.

Mayo, 1997

Ahumada R. & Contreras, S. 1997. “Hypothesis over the source of cadmium content in two Bays from central Chile”. XVII National meeting of Marine Sciences, University of Chile, Santiago, Chile.

Mayo, 1996

Contreras, S., J. A. Gallardo; C. Hernández & J. M. Cancino. 1996. “Study of the macroinfauna in the sandy beach from Lenga, San Vicente Bay (Region VIII)”. XVI National meeting of Marine Sciences, University of Concepción, Concepción, Chile.

Noviembre, 2018

“Lacustrine sedimentary leaf wax distribution along a climatological gradient on the western side of the southern Andes” Joint Conference on Forests and Water 2018, Valdivia, Chile.

Agosto, 2017

“Constraining the hydroclimate gradient in Southern South America using molecular isotopic proxies” Invited talk (Geoseminar) at Alfred Wegener Institute for Polar and Marine Research, Bremerhaven, Germany.

Noviembre, 2016

“Evaluando el porcentaje e isótopos estables de carbono y nitrógeno orgánico total en sedimentos superficiales lacustres como indicadores de gradientes climáticos a lo largo de la costa oeste de Sudamérica”. 1er Congreso Iberoamericano de Limnología. XIII Congreso de la Sociedad de Limnología. Universidad Austral, Chile.

Abril, 2016

Charla inagural “Cambio climático y la importancia de su estudio en el pasado”. Ingeniería en Prevención de riesgos, calidad y ambiente. Universidad Tecnológica de Chile Instituto Profesional Centro de Formación Técnica (INACAP), Talcahuano, Chile.

Septiembre, 2015

Invited presentation “Cambio climático y su estudio en el pasado” as part of the Seminar “Cambio climático y sus consecuencias ¿Estamos preparados”, Campus Cañete, Universidad Católica de la Santísima Concepción.

Abril 2014

“Registrando el gradiente hidro-climático del sur de Sudamérica a través de proxies geoquímicos lacustres” proyecto de inserción a la Academia. Facultad de Ciencias. Universidad Católica de la Santísima Concepción.

Enero, 2014

A Monthly Scientific Seminar Series by Postdocs for Postdocs. University of Pittsburgh, Pittsburgh, USA.  “Constraining the Hydroclimate variability in Southern South America through lacustrine geochemical proxies.

Septiembre, 2013

Department of Geology and Planetary Science, Colloquium Series Fall 2013, University of Pittsburgh, Pittsburgh, USA. “Reconstructing climate variability and vegetation changes during Pleistocene Interglacial transitions from Southwestern North America: Valles Caldera sedimentary record”

Junio, 2012

Invited presentation as part of the Institutional Seminars. Instituto de Ciencias del mar y Limnología, Universidad Autónoma de México, México. “Registro sedimentario de Valles Caldera, Nuevo México: Una ventana para estudiar el cambio climático global”

Febrero, 2011

Department of Geological Sciences Seminar, University of Minnesota-Duluth, Duluth, USA. “Paleo-signals of a dynamic deep-biosphere: tracing geochemical imprints in the Peruvian continental shelf sub-seafloor”

Septiembre, 2010

Invited presentation as part of the Meereswissenschaftliches Kolloquium at the Leibniz Institute of Marine Sciences, IFM-GEOMAR, Kiel, Germany. “Does anammox shift the oceanic nitrogen budget to the homeostasis?”

Mayo, 2010

Invited presentation to the Chemical Oceanography and Biogeochemistry Seminar series. Earth, Atmospheric & Planetary Sciences. Massachusetts Institute of Technology Cambridge, USA. “Nitrogen isotope signature of anammox”.

Octubre, 2009

Invited presentation to in the seminars of the Center for Geomicrobiology at the University of Aarhus, Denmark. “Paleoceanographic tools to trace deep sub-surface biogeochemistry”

Septiembre, 2009

International Meeting on Organic Geochemistry (IMOG), Bremen, Germany. “A rainy northern Atacama Desert during the last interglacial”.

Noviembre, 2008

EPICA 2008 Open Science Conference, Venice, Italy. “A rainy northern Atacama desert due to ~10,000 years of El Niño-like conditions during the last interglacial”

Septiembre, 2008

ECORD Summer School on “The Deep Sub-seafloor Biosphere”, Bremen, Germany. “Tracking past oceanographic changes during the last interglacial off Peru margin”.

Junio, 2008

Invited presentation to the Geosciences Division Seminars at the Alfred Wegener Institute for Polar and Marine Research. Bremerhaven, Germany. “Past oceanographic conditions from marine sediments using specific biomarkers and relationships with deep sub-surface biogeochemistry”