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Sergio Xavier

PhD student
University of Montpellier

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My activity

Climate changes affect the vegetation dynamics composition and structure in different ways, with species expanding or retracting their dominance areas. In this sense, paleofloristic reconstructions are important tools for the elucidation of paleoecological studies. My research aims to study compositional variations of northeastern Brazilian Cerrado vegetation as a result of natural and anthropic environmental changes during the Holocene. For this, I analyze the pollen assemblage and charcoal fragments deposited in wetland sediments, in order to reconstruct past vegetation and land-use history. Understanding the vulnerability level of these ecosystems is important for the creation of predictive models to forthcoming climate changes and management plans for Cerrado preservation.

Keywords :

Cerrado – Northeastern Brazil – Holocene – Climate change – Anthropic disturbance

Directeur·ice(s) de thèse :

Francisca Soares Araujo (Federal University of Ceará, Fortaleza, Brazil)