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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Solos, geomorfologia e relações ecológicas na parte sudoeste da península de Byers, Ilha Livingston, Antártica Marítima / Soils, geomorphology and environments at the south-west are of the Byers Peninsula, Livingston Island, Maritime Antarctic

Faria, André Luiz Lopes de 15 September 2010 (has links)
Submitted by Reginaldo Soares de Freitas (reginaldo.freitas@ufv.br) on 2017-08-16T12:29:49Z No. of bitstreams: 1 texto completo.pdf: 7358265 bytes, checksum: 10f8c9ced6b5091bb3669015a62193ba (MD5) / Made available in DSpace on 2017-08-16T12:29:49Z (GMT). No. of bitstreams: 1 texto completo.pdf: 7358265 bytes, checksum: 10f8c9ced6b5091bb3669015a62193ba (MD5) Previous issue date: 2010-09-15 / A Península de Byers, Ilha de Livingston possui a mais extensa área livre de gelo da Antártica Marítima, com intensa atividade biológica da fauna local (pinguins, petréis, elefantes marinhos, dentre outros), e notável geoformas típicas de ambientes periglaciais. Possui litologia vulcânica e solos variáveis, como consequência da diversidade de geoambientes. Esta pesquisa levantou, analisou e mapeou os criossolos e a geomorfologia do setor meridional da península a partir dos critérios do sistema World Reference Base (WRB). Identificou-se que as características e as relações geoambientais indicam uma forte heterogeneidade ambiental, governada pela diversidade de solos, materiais de origem sedimentar marinha, continental ou vulcânica, extensas áreas ornitogênicas, bem como fatores topográficos. Praticamente não existem Morainas em Byers, como consequência de sua topografia regular (63%), exceção às áreas próximas à geleira Rotch. Predominam os solos com padrões (28,4%) e as plataformas de crioplanação (12,9%). Os solos ornitogênicos são mais extensos e desenvolvidos. Os Neossolos regolíticos de algas ocorrentes em paleo-praias holocênicas são pedopaisagens únicas, não tendo sido descritos em nenhuma outra Ilha da Antártica Marítima. Byers é um dos conjuntos mais antigos de paisagens livres de gelo da Antártica Marítima. / The Byers Peninsula, Livingston Island, has the most extensive area free of ice at the Maritime Antarctic, with intense biological activity of local fauna (penguins, petrels, elephant seals, among others), and notable typical geoforms of periglacial environments. It has volcanic lithology and several types of soils as consequence of the diversity of geoenvironments. This research studied, analyzed and mapped the cryosols and the geomorphology of the southern sector of the peninsula with the World Reference Base (WRB) system criteria. It was identified that the characteristics and geoenvironmental relations indicate a strong environment heterogeneity, ruled by soil diversity, materials of marine, continental or volcanic sedimentary source, extensive ornithogenic areas, as well as topographic factors. Practically, there are no moraines at Byers because of your regular topography (63%), except the areas near the Rotch glacier. Standardized soils (28,4%) and the cryoplanation platforms (12,9%) prevail at the area. The ornithogenic soils are most extensive and developed. The Regolithic Neosols of algae at Holocenic paleobeaches are unique landscapes, not being described in any other island of the Maritime Antarctic. Byers is one of the most ancient sets of landscapes free of ice at the Maritime Antarctic.

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