Phytolith
Mostrando 1-6 de 6 artigos, teses e dissertações.
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1. Paleoenvironmental Characterization of a High-Mountain Environment in the Atlantic Forest in Southeastern Brazil
ABSTRACT: Records of changes in the phytosociological structure of vegetation can be observed more clearly in soils that have more significant accumulation of organic matter, like those occurring in high-mountain environments. The aim of this study was to characterize soils formed in high-mountain environments in the Itatiaia National Park (INP), state of Ri
Rev. Bras. Ciênc. Solo. Publicado em: 14/11/2018
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2. Opal phytolith and isotopic studies of "Restinga" communities of Maricá, Brazil, as a modern reference for paleobiogeoclimatic reconstruction
ResumoA Restinga de Maricá, situada na porção leste do estado do Rio de Janeiro (Brasil), corresponde a uma das poucas áreas ainda preservadas na planície litorânea fluminense. Neste trabalho, apresentamos um estudo sobre as comunidades vegetais que compõem a restinga, bem como a identificação das principais espécies presentes em cada uma delas. O
Braz. j. oceanogr.. Publicado em: 2015-09
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3. Análise e identificação de microvestígios vegetais de cálculo dentário para a reconstrução de dieta sambaquieira: estudo de caso de Jabuticabeira II, SC / Analysis and identification of plant microfossils from dental calculus for the reconstruction of shellmound builder\ s diet: a case study from Jabuticabeira II, SC
Embora os indivíduos construtores dos sambaquis constituam o grupo pré-histórico brasileiro melhor estudado, várias questões continuam em aberto. Algumas delas estão ligadas a estratégias de subsistência. Sabe-se que a economia desses indivíduos era baseada na pesca e que a coleta de moluscos teria papel complementar na alimentação. Mas, atualment
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 26/06/2012
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4. Termodecomposição, estudos de carbonização e silicificação da matéria orgânica e corpos silicosos em ecossistemas terrestres no Brasil e na Antártica / Thermodecomposition, organic matter carbonization silicification studies and silica bodies in terrestrial ecosystems in Brazil and Antarctica
Soil organic matter (SOM) is highly heterogeneous in composition, which consists of components as different from each other as labile carbohydrates and recalcitrant aliphatic compounds. Mean residence time (MRT) of the various compounds comprising soil organic matter may range from a few minutes to thousands of years. This wide range is partly due to the soi
Publicado em: 2007
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5. Evidence for the control of phytolith formation in Cucurbita fruits by the hard rind (Hr) genetic locus: Archaeological and ecological implications
Many angiosperms, both monocotyledons and dicotyledons, heavily impregnate their vegetative and reproductive organs with solid particles of silicon dioxide (SiO2) known as opaline phytoliths. The underlying mechanisms accounting for the formation of phytoliths in plants are poorly understood, however. Using wild and domesticated species in the genus Cucurbit
National Academy of Sciences.
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6. Decoupled taxonomic radiation and ecological expansion of open-habitat grasses in the Cenozoic of North America
Because of a dearth of Cenozoic grass fossils, the timing of the taxonomic diversification of modern subclades within the grass family (Poaceae) and the rise to ecological dominance of open-habitat grasses remain obscure. Here, I present data from 99 Eocene to Miocene phytolith assemblages from the North American continental interior (Colorado, Nebraska, Wyo
National Academy of Sciences.