Browsing by Author "Hebel, Ingrid"
Now showing 1 - 2 of 2
Results Per Page
Sort Options
Item Early knowledge of antarctica’s vegetation: expanding past and current evidence(Sociedad de Biología de Chile, 2012) Hebel, Ingrid; Galleguillos, Carolina; Jaña, Ricardo; Dacasa-Rüdinger, María D.C.To commemorate one hundred years of Roald Amundsen’s reaching the South Pole, we provide a summary of early explorations to Antarctica, in which botanists played an almost anonymous role. Based on multiple observations of vegetation they found and recorded, we review the knowledge available at the end of the nineteenth century to compare with contemporary scientifi c beliefs; connecting them with observations we have collected in fi eld-work. Using the aerial photography from the end of the 1950s of sites we visited, it is noted that opportunities are arising for the understanding of colonization phenomena in areas where ice is retreating. Accounts of research on colonization of new ice-free areas are analyzed as well as how molecular genetics attempts to deduce the early settlements. Finally, an analysis of conservation in Antarctica is provided and its outlook discussed.Item Polen fósil de isla Rey Jorge (Antártica) y Chile continental, afin a proteaceae chilenas(Universidad de Magallanes, 2009) Hebel, Ingrid; Torres, TeresaSe realizó un estudio morfológico de palinomorfos fósiles provenientes de rocas sedimentarias terciarias de la península Fildes, isla Rey Jorge, archipiélago de las Shetland del Sur, Antártica y de dos localidades terciarias de Chile continental. El objetivo es la identificación y descripción de los granos de polen fósil, así como la comparación con las Proteaceae chilenas. De las formas fósiles afines a Proteaceae, ocho pertenecen a Proteacidites, tres a Propylipollis y dos a Triorites. Los palinomorfos afines a especies actuales provienen, principalmente, de sedimentos del Mioceno de Chile continental y del Eoceno Superior de la isla Rey Jorge, Antártica. Se establecen las afinidades de Propylipollis concretus y Proteacidites pseudomoides con Gevuina avellana; Proteacidites aff callosus y Propylipollis sp.1 con Lomatia hirsuta; Proteacidites aff callosus, Proteacidites cf. subscabratus y Proteacidites harrisii con Orites myrtoidea; y Propylipollis microverrucatus con Lomatia ferruginea. El resto no serían afines a ninguna especie actual de Proteaceae.