Sand Dunes
Mostrando 1-12 de 39 artigos, teses e dissertações.
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1. Tripartite symbiosis of Sophora tomentosa, rhizobia and arbuscular mycorhizal fungi
ABSTRACT Sophora tomentosa is a pantropical legume species with potential for recovery of areas degraded by salinization, and for stabilization of sand dunes. However, few studies on this species have been carried out, and none regarding its symbiotic relationship with beneficial soil microorganisms. Therefore, this study aimed to evaluate the diversity of n
Braz. J. Microbiol.. Publicado em: 2017-12
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2. Behavior and identification of ephemeral sand dunes at the backshore zone using video images
ABSTRACT The backshore zone is transitional environment strongly affected by ocean, air and sand movements. On dissipative beaches, the formation of ephemeral dunes over the backshore zone plays significant contribution in the beach morphodynamics and sediment budget. The aim of this work is to describe a novel method to identify ephemeral dunes in the backs
An. Acad. Bras. Ciênc.. Publicado em: 01/09/2016
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3. Numerical prediction of bed-load and surface deformation on a granular bed sheared by a turbulent boundary-layer
The entrainment of solid particles by a fluid flow is frequently found in nature and in industry. A better knowledge of this is of importance to understand the physical nature of the phenomenon and to improve industrial processes. Bed-load occurs if the shear stresses exerted by the fluid on the granular bed are bounded to some limits: a mobile granular laye
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2012-03
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4. Sequence variation in the melanocortin-1 receptor (MC1R) pigmentation gene and its role in the cryptic coloration of two South American sand lizards
In reptiles, dorsal body darkness often varies with substrate color or temperature environment, and is generally presumed to be an adaptation for crypsis or thermoregulation. However, the genetic basis of pigmentation is poorly known in this group. In this study we analyzed the coding region of the melanocortin-1-receptor (MC1R) gene, and therefore its role
Genetics and Molecular Biology. Publicado em: 03/02/2012
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5. The Genus Herposiphonia (Ceramiales, Rhodophyta) in the Coral Reefs Environmental Protection Area, Northeastern Brazil, with new records for Brazil and the Atlantic Ocean
This paper presents a taxonomic study of taxa of the red algae genus Herposiphonia (Ceramiales) occurring on Maracajaú Reef in the Coral Reefs Environmental Protection Area (CREPA - Área de Proteção Ambiental dos Recifes de Corais) in Rio Grande do Norte State, along the northeastern coast of Brazil. The CREPA comprises coastline and continental shelf ar
Braz. J. Bot.. Publicado em: 2012
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6. Morfodinâmica associada entre duna, praia e zona submarina como subsídio a adequada ocupação do espaço costeiro na Praia do Peró - RJ. / Morphodynamics associated between dune, beach and underwater area as an aid to proper occupation of coastal space in Praia do Pero - RJ.
The coastline offers a veritable mosaic of diversity in coastal landforms, which enable the development of a number of different economic activities. Coastal environments are highly dynamic and involve a complex series of continental and oceanic processes. The beach of Pero, located between Cape Buzios and Cabo Frio, Rio coast, appears as an area distinct fr
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 01/03/2011
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7. CaracterizaÃÃo dos lenÃÃis maranhenses e dunas inativas (fÃsseis): implicaÃÃes paleoambientais / Characterization of MaranhÃo and sand dune sheets (fossil): paleoenvironmental implications
MudanÃas climÃticas na escala de tempo de sÃculos ou dÃcadas podem produzir variaÃÃes ecolÃgicas significativas, alterando os cenÃrios naturais do globo terrestre, assim como, comprometer o bem estar do homem e de outros seres vivos no planeta, por isso, torna -se importante estudar as evoluÃÃes climÃticas durante o perÃodo QuaternÃrio, pois se
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 23/06/2010
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8. Initial instabilities of a granular bed sheared by a turbulent liquid flow: length-scale determination
The transport of granular matter by a fluid flow is frequently found in nature and in industry. When the shear stresses exerted by the fluid flow on a granular bed are bounded to some limits, a mobile granular layer known as bed-load takes place, in which the grainsstay in contact with the fixed part of the granular bed. Under these conditions, an initiallyf
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2010-12
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9. Annual activity of the lizard Liolaemus occipitalis (Squamata, Liolamidae) in the coastal sand dunes of southern Brazil
Este trabalho teve por objetivo o estudo da atividade anual do lagarto Liolaemus occipitalis Boulenger, 1885. O estudo se desenvolveu nas dunas costeiras da praia de Quintão (Palmares do Sul, sul do Brasil), no período de setembro de 1998 a agosto de 1999. Os resultados demonstraram que L. occipitalis é ativo ao longo de todo o ano com variações diária
Publicado em: 2010
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10. Geomorfologia e potencial de preservação dos campos de dunas transgressivos de Cidreira e Itapeva, litoral norte do Rio Grande do Sul, Brasil
The association of several favorable factors (high supply of fine sand to the beach, appropriate wind regime, lowland topography) has resulted in the development of a wide transgressive dunefield that stands out as a fundamental element in the coastal landscape of Rio Grande do Sul, southern Brazil. Along the northern littoral of the state, most of this orig
Publicado em: 2010
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11. Thermal biology of Liolaemus occipitalis (Squamata, Tropiduridae) in the coastal sand dunes of Rio Grande do Sul, Brazil / Biologia termal de Liolaemus occipitalis (Squamata, Tropiduridae) nas dunas costeiras do Rio Grande do Sul, Brasil
A biologia termal da lagartixa da areia, Liolaemus occipitalis, foi estudada nas dunas costeiras da Praia de Quintão (Palmares do Sul, Rio Grande do Sul, Brasil; 30° 24’ S e 50° 17’ W), entre setembro de 1998 e agosto de 1999. Liolaemus occipitalis apresentou temperatura corpórea média de 30,89 °C (SD = 4,43 °C; min = 16,4 °C; max = 40,2 °C; N
Publicado em: 2010
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12. Vegetação dunar: caracterização estrutural de dunas do município de Natal-RN como subsídio para implantação de técnicas de reflorestamernto, recuperação e conservação do ecossistema
The Brazilian coast has a wide variety of complex environments and ecosystems along the coast, about 80% are represented by sandbanks and dunes. The coastal ecosystems were the first to suffer the impacts man and places, as the very fragile ecosystems, are somehow altered. Are few areas of restinga well as natural features, very few protected in conservation
Publicado em: 2009