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Actualités et séminaires

  • 06 juin Séminaire
    Ce qui se retrouve sur notre sol, reflet de notre société ?
  • 02 juin Séminaire
    New developments for paleoclimate studies

    Lake sediments are useful to track a history of long-term environmental changes.  Environmental monitoring often extends back no more than a few decades, and is largely non-existent in remote places like the Arctic, which is currently experiencing some of the most rapid environmental change on Earth. Archival sediment records in the form of dated sediment cores can greatly enhance our knowledge of past environmental change because they can extend the time scales of studies by thousands of years and they are broadly distributed in the environment.

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  • 26 mai Séminaire
    A paleolimnological perspective on avian population dynamics and their effect on lake productivity in a rapidly warming Arctic

    Rapid warming since the 19th century is transforming the Arctic, including its freshwater ecosystems as warmer temperatures and greater nutrient inputs from a greening landscape are increasing lake and pond productivity. However, nutrients from growing avian nesting colonies can have a much greater effect on aquatic primary production, as undisturbed Arctic catchments have relatively low nutrient inputs. Therefore, a more complete assessment of climate warming’s influence on Arctic aquatic primary production should consider how warming may influence avian population dynamics.

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  • 16 mai Séminaire
    Evolutions futures des ressources en eau en France et conséquences possibles sur l’irrigation
  • 28 mar Séminaire
    Structure and hydrogeology of the Ox Bel’Ha karstic system, Mexico

    The Ox Bel’Ha and Sac Actun karstic systems are among the longest coastal cave systems in the world. These systems are located around and below the city of Tulum on the east side of the Yucatan peninsula. Divers have explored and mapped them for years and obtained detailed topographical information. The caves are mainly shallow (15-30 m below surface) and form a dense network of submerged caves directly outflowing to the ocean. The rapid urban development of Tulum goes with decreasing groundwater quality in the karstic system and a new threat for the coral reef and its biodiversity.

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