Solos de Hope Bay, Península Antártica

• Autor(a) principal: Pereira, Thiago Torres Costa
• Data de Publicação: 2012
• Tipo de documento: Tese
• Idioma: por
• Título da fonte: LOCUS Repositório Institucional da UFV
• Texto Completo: http://locus.ufv.br/handle/123456789/1627
• topic: Pedogênese; Fosfatização; Solos ornitogênicos; Criossolos; Pedogenesis; Phosphating; Ornithogenic soil; Criossolos; CNPQ::CIENCIAS AGRARIAS::AGRONOMIA::CIENCIA DO SOLO

Antarctica is a unique environment for soil formation and study of its processes. The soils are formed in ice-free coastal areas and glacial valleys between mountain ranges, representing 0.32%, or 45,000 km2 of the continent. Regarding the increase of research in recent years, few studies in soils and permafrost at Antarctic Peninsula focused on area where climate transitions occur, between South Shetlands archipelago, humid, and the Weddell Sea, more dry. Thus, studies in this work focused on Hope Bay, located on the northern far of Antarctic Peninsula, representing the transition climate between these two areas. Currently, there is an undeniable influence of permafrost on water resources, soil properties and vegetation growth. Furthermore, other researches are related to the carbon balance due to permafrost degradation by increase of temperature. These regions that permafrost occurs are strongly subject to high surface energy transfer, whose ecosystems are notoriously sensitive to climate change, and the study and monitoring of permafrost and active layer to be significant prognostic research involving these changes. Others works related to the input of organic matter mainly by penguins, resulting in phosphatic clay minerals and ornithogenic soil formation, are fundamental to understanding the processes of pedogenesis and ecological relationships in coastal areas. Morphological, physical, chemical, mineralogical and micromorphological characteristics were studied to better understanding of soil formation at Hope Bay. The aimed was to understand the climatic transition significance on pedogenetic zonation existing between Hope Bay and South Shetlands archipelago. It is expected that all data and information studied can support future research involving soils and permafrost dynamics in coastal environments, especially at Antarctic Peninsula.