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Análise temporal da heterogeneidade florística e estrutural em uma floresta ribeirinha Rev. Bras. Bot.
BERTANI,DANIELA FESSEL; RODRIGUES,RICARDO RIBEIRO; BATISTA,JOÃO LUIZ FERREIRA; SHEPHERD,GEORGE JOHN.
Neste trabalho, foram estudadas a composição florística e a estrutura fitossociológica da vegetação em um fragmento de floresta ribeirinha, ao longo do rio Passa Cinco, Ipeúna, SP. Foram amostradas 157 parcelas contínuas de 5 x 10 m, em uma área de 0,785 ha. Foram feitas medidas de diâmetro e mapeados todos os indivíduos com DAP maior ou igual a 5 cm, em 1989 e 1998. Constatou-se a presença de um mosaico vegetacional e discutiram-se os possíveis fatores definidores deste mosaico. Foram, também, verificadas as alterações florísticas e fitossociológicas na área após nove anos. As análises multivariadas da vegetação mostraram a presença de três grupos vegetacionais com grande sobreposição aos três tipos de solo identificados na área. As análises quantitativas...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Tropical riverine forest; Tree communities; Dynamics; Soil; Topography.
Ano: 2001 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042001000100002
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ANALYSIS OF SOIL FERTILITY TESTING PROCEDURES USING UNIFORM, TOPOGRAPHICAL AND OTHER SITE-SPECIFIC METHODS AgEcon
Haugen, Ronald H.; Aakre, Dwight G..
This study summarizes an analysis of uniform, topographical and other site-specific soil fertility testing procedures based on observations of various crops at various locations in North Dakota and one location in Minnesota for 2001 through 2004. Results showed little difference in economic returns among the soil fertility testing methods by crop or location.
Tipo: Working or Discussion Paper Palavras-chave: Fertility; Topography; Soil testing; Site-specific; North Dakota; Land Economics/Use.
Ano: 2005 URL: http://purl.umn.edu/23580
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Canopy gap colonization in the Atlantic Montane Rain Forest BABT
Lima,Renato A. Ferreira de; Moura,Leila Cunha de.
In the Atlantic Montane Rain Forest of South-eastern Brazil, a study was carried out to describe and evaluate canopy gap colonization. Gap composition by herb species was assessed through their soil coverage and woody species by measuring and identifying all individuals taller than one meter. Gap structure (gap size, number and diameter of treefalls), topographic position and surrounding vegetation were also measured. Two genera of Marantaceae were markedly frequent and abundant inside gaps. The more abundant and frequent woody species were shade tolerant. Species-rich families found inside gaps did not differ from the forest as a whole. Results revealed that direct and indirect influences of topography were important to determine gap composition of woody...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Gap floristics; South-eastern Brazil; Marantaceae species; Montane rain forest; Topography.
Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132006000700013
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Caracterização geomorfológica do município de Luís Eduardo Magalhães, oeste baiano, escala 1:100.000. Infoteca-e
CASTRO, K. B. DE; MARTINS, E. de S.; GOMES, M. P.; REATTO, A.; LOPES, C. A.; PASSO, D. P.; LIMA, L. A. DE S.; CARDOSO, W. DOS S.; CARVALHO JUNIOR, O. A.; GOMES, R. A. T..
Este trabalho apresenta a caracterização geomorfológica do município de Luís Eduardo Magalhães, BA, na escala 1:100.000. A metodologia utilizada para o mapeamento geomorfológico foi baseada no uso de imagens de altimetria Shuttlle Radas Topografhy Mission (SRTM), de técnicas de geoprocessamento e de trabalhos de campo. A geomorfologia foi caracterizada em três níveis taxonômicos: 1. nível: domínio morfoestrutural, composto pela cobertura sedimentar São Franciscana (100%); 2. nível: regiões geomorfológicas compostas pelas chapadas do São Francisco (28,7%) e 3. nível: unidades geomorfológicas, formado pelas unidades chapadas intermediárias (42%), topos (26%), frente de recuo erosivo (22%), planície intraplanáltica (7%) e veredas (3%). O mapeamento...
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E) Palavras-chave: Geomorfologia; Mapa; Relevo; Bacia do São Francisco; Topography; Landscape; SRTM data; Geomorphology; Geotechnology; São Francisco Basin; Brazil.
Ano: 2010 URL: http://www.infoteca.cnptia.embrapa.br/handle/doc/891209
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Detrending non stationary data for geostatistical applications Bragantia
Vieira,Sidney Rosa; Carvalho,José Ruy Porto de; Ceddia,Marcos Bacis; González,Antonio Paz.
The use of geostatistics requires at least that the intrinsic hypothesis be satisfied. The presence of a trend in the data invalidates this hypothesis. One of the ways of solving this problem is by subtracting a function fitted to the original data and working with the residuals. This technique also represents a change to a smaller scale of the variability and surface roughness. This paper describes the detrending technique of subtracting a trend surface fitted by the least squares method and discusses the results using topographical data as examples. The objective is to show how the detrending technique works for different scales and degrees of trend and how to interpret the results. It is shown that the simplest the surfaces fitted that does the work of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Semivariograms; Stationarity; Topography; Scale of variation.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052010000500002
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Different slopes of a mountain can determine the structure of ferns and lycophytes communities in a tropical forest of Brazil Anais da ABC (AABC)
NETTESHEIM,FELIPE C.; DAMASCENO,ELAINE R.; SYLVESTRE,LANA S..
A community of Ferns and Lycophytes was investigated by comparing the occurrence of species on different slopes of a paleoisland in Southeastern Brazil. Our goal was to evaluate the hypothesis that slopes with different geographic orientations determine a differentiation of Atlantic Forest ferns and lycophytes community. We recorded these plants at slopes turned towards the continent and at slopes turned towards the open sea. Analysis consisted of a preliminary assessment on fern beta diversity, a Non Metric Multidimensional Scaling (NMDS) and a Student t-test to confirm if sites sampling units ordination was different at each axis. We further used the Pearson coefficient to relate fern species to the differentiation pattern and again Student's t-test to...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Atlantic rain forest; Topography; Pteridophytes; Richness; Environmental factors.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652014000100199
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Ecossistema de pastagem cultivada na Amazônia brasileira. Infoteca-e
FALESI, I. C..
A pesquisa foi realizada em áreas com pastos de idades diferentes, desde meses de idade (formação) ate 11 anos, tomando-se a área com floresta natural como elemento de comparação (testemunha). Foram coletadas amostras de solos de 0-20 cm em cada uma dessas áreas, alem da coleta de perfis pedagógicos ate a uma profundidade de 1,50 m. Apos a obtenção das analises no laboratório, constatou-se que vários nutrientes e índices ou valores, sofreram acréscimos quando o solo foi cultivado com pastagem, melhorando portanto, as suas propriedades químicas. Os elementos que mais se evidenciaram, foram: cálcio, magnésio, fosforo, alumínio, e os índices de pH, V (saturação de bases), S (soma de bases) e saturação de alumínio. Os quadros de analises e gráficos constantes...
Tipo: Séries anteriores (INFOTECA-E) Palavras-chave: Pastagem cultivada; Ecossistema; Ecologia; Clima; Vegetação; Topografia; Solo; Geologia; Fertilidade; Amazônia; Brasil; Sown pasture; Ecosystem; Ecology; Climate; Vegetation; Topography; Soil; Fertility; Geology.
Ano: 1976 URL: http://www.infoteca.cnptia.embrapa.br/handle/doc/385693
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Effects of Monsoon Winds and Topographical Features on the Vertical Thermohaline and Biogeochemical Structure in the Gulf of Tadjourah (Djibouti) ArchiMer
Omar, Youssouf Moussa; Memery, Laurent; Carton, Xavier; Daher, Abdourahman; Duvielbourg, Eric.
The vertical thermohaline and biogeochemical structures of the upper layer (0 - 200 m) were studied in the Gulf of Tadjourah using high-resolution hydrographic data collected in July-August 2013, September 2013 and February 2014. During summer, the superficial layer consisted of the mixed layer (ML) extending to a depth of about 20 - 30 m followed by the thermocline located between 30 and 50 m depth. The ML was thicker in the west and the southeast where the thermal gradient and chlorophyll a concentrations were particularly high. During September, this stratification persisted but the ML became warmer and saltier and the thermocline moved slightly deeper. In February, the ML extended to about 120 m, and the thermocline was less pronounced. A comparison of...
Tipo: Text Palavras-chave: Thermohaline; Biogeochemical Structures; Mixed Layer Depth; Thermocline; Monsoon Wind; Topography.
Ano: 2016 URL: https://archimer.ifremer.fr/doc/00601/71286/69693.pdf
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Erosion factors and magnetic susceptibility in differet compartments of a slope in Gilbués-PI, Brazil REA
Santos,Hélio L.; Marques Júnior,José; Matias,Sammy S. R.; Siqueira,Diego S.; Martins Filho,Marcílio V..
The erosion is the degradation of soil with effects on crop productivity and pollution of the environment. To understand the spatial variability of this phenomenon, geostatistical techniques and concepts of soil-landscape can be used to identify landscape compartments with different potential of erosion. The aim of this study was to understand the factors of erosion in landscape compartments and the relations with the magnetic susceptibility (MS) of the soils in a slope in Gilbués, state of Piauí (PI), Brazil. Sampling meshes were set in compartments I and II with 121 points and in compartment III with 99 points spaced every 10 meters. There was significant difference to erodibility (K) and risk of erosion (RE); the spatial variability of MS was lower than...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Indirect quantification; Geostatistics; Conservation planning; Compartments; Topography; Relief; Landscape.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162013000100008
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Fisiografia - solos da região de Marabá/PA. A forte influencia tectônica na qualidade e distribuição das unidades geoambientais. Repositório Alice
SILVA, L. G. T.; JIMENEZ-RUEDA, J. R.; MATTOS, J. T. de; MUCHAGATA, M. G..
bitstream/item/174554/1/doc096.pdf
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: Solo; Morfologia; Tectonica; Topografia; Fisiografia; Brasil; Pará; Marabá; Soil; Morphology; Topography; Physiography.
Ano: 1993 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/394308
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Floristic composition and topographic variation in a tidal floodplain forest in the Amazon Estuary Rev. Bras. Bot.
CATTANIO,JOSÉ H.; ANDERSON,ANTHONY B.; CARVALHO,MANOEL S..
Slight topographic variations appear to exert dramatic effects on the structure of forests subject to inundation. In a late successional tidal floodplain forest near the Amazon port of Belém, Brazil, we examined these effects by studying floristic composition along a topographic gradient. We predicted that, relative to high sites, low sites would be characterized by high representation of life forms and taxa characteristic of inundated sites. We found striking variations in floristic composition along a slight topographic gradient. In comparison with topographically high sites, low sites were characterized by a high representation of Palm trees (Arecaceae), low diversity of trees and lianas, and high plant density. These variations appear to reflect...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Floodplain; Floristic; Forest; Topography; Várzea.
Ano: 2002 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042002012000006
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How momentum advection schemes influence current-topography interactions at eddy permitting resolution ArchiMer
Le Sommer, Julien; Penduff, Thierry; Theetten, Sebastien; Madec, Gurvan; Barnier, Bernard.
Recent studies have shown that the use of an enstrophy-and-energy-conserving momentum advection scheme substantially reduces widespread biases of mean currents in the global 1/4 degrees DRAKKAR model. This paper investigates the origin of these improvements. A series of sensitivity simulations with different momentum advection schemes is performed with the North Atlantic 1/4 degrees DRAKKAR model. Three second order momentum advection schemes conserving, respectively, enstrophy (ens), energy (efx) and both quantities (een) are tested and their impact on the model solution are compared. The mean kinetic energy vertical profile is found to change up to 10% depending on the chosen scheme. This sensitivity is maximum in bottom layers. The analysis of the...
Tipo: Text Palavras-chave: Z level models; Topography; Momentum advection schemes.
Ano: 2009 URL: http://archimer.ifremer.fr/doc/2009/publication-6440.pdf
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Identificação de limitações pedológicas e ambientais causadoras da degradação de áreas do Jardim Botânico do Rio de Janeiro. Repositório Alice
CALDERANO FILHO, B.; WITTERN, K. P.; CONCEIÇÃO, M. da; TAVARES, N. P.; FAGUNDES, S. R. F..
A constatação do apodrecimento das raízes pivotantes e do enraizamento superficial de espécies arbóreas do parque do Jardim Botânico do Rio de Janeiro, principalmente na área representativa da flora amazônica, fato que tem ocasionado frequentes tombamentos e consequente morte dos mesmos, suscitou a necessidade de um estudo da área com o objetivo de identificar e caracterizar os fatores pedológicos e ambientes que possam estar contribuindo para a degeneração e morte destes espécimes. Após exame exploratório do parque e adjacências surgiram como prováveis causadores: a altura do lençol freático que atinge a zona de enraizamento e provoca falta de oxigênio; possível presença de sais solúveis na altura das raízes; problemas de inundações periódicas...
Tipo: Livro científico (ALICE) Palavras-chave: Jardim Botânico; Meio Ambiente; Clima; Topografia; Hidrografia; Geomorfologia; Solo; Drenagem; Inundação; Botanical gardens; Environment; Climate; Topography; Hydrograph; Geomorphology; Soil; Drainage.
Ano: 1992 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/328587
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Infraclavicular Topography of the Brachial Plexus Fascicles in Different Upper Limb Positions International Journal of Morphology
Alves dos Santos,Daniel; Iatecola,Amilton; Dias Vecina,Cesar Adriano; Caldeira,Eduardo Jose; Noboro Isayama,Ricardo; Chacon,Erivelto Luis; Alves,Marianna Carla; Palomari,Evanisi Teresa; Salete Viotto,Maria Jose; Rodrigues da Cunha,Marcelo.
Brachial plexus neuropathies are common complaints among patients seen at orthopedic clinics. The causes range from traumatic to occupational factors and symptoms include paresthesia, paresis, and functional disability of the upper limb. Treatment can be surgical or conservative, but detailed knowledge of the brachial plexus is required in both cases to avoid iatrogenic injuries and to facilitate anesthetic block, preventing possible vascular punctures. Therefore, the objective of this study was to evaluate the topography of the infraclavicular brachial plexus fascicles in different upper limb positions adopted during some clinical procedures. A formalin-preserved, adult, male cadaver was used. The infraclavicular and axillary regions were dissected and...
Tipo: Journal article Palavras-chave: Brachial plexus; Topography; Peripheral nerve injuries; Upper limb.
Ano: 2016 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022016000300040
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Isotopic composition of soils and plants in a gallery forest of cerrado biome: effect of topographic gradient. Infoteca-e
PARRON. L. M.; BUSTAMANTE, M. M. C.; CAMARGO, P.; PRADO, C. L.; MARTINELLI, L. A..
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Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E) Palavras-chave: Mata de galeria; Cerrado; Química do solo; Topografia; Essência florestal; Woody plants; Soil chemistry; Topography; Forests.
URL: http://www.infoteca.cnptia.embrapa.br/handle/doc/568331
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Jack knifing for semivariogram validation Bragantia
Vieira,Sidney Rosa; Carvalho,José Ruy Porto de; González,Antonio Paz.
The semivariogram function fitting is the most important aspect of geostatistics and because of this the model chosen must be validated. Jack knifing may be one the most efficient ways for this validation purpose. The objective of this study was to show the use of the jack knifing technique to validate geostatistical hypothesis and semivariogram models. For that purpose, topographical heights data obtained from six distinct field scales and sampling densities were analyzed. Because the topographical data showed very strong trend for all fields as it was verified by the absence of a sill in the experimental semivariograms, the trend was removed with a trend surface fitted by minimum square deviation. Semivariogram models were fitted with different...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Semivariograms; Stationarity; Topography; Scale of variation.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052010000500011
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Land in Tropical America. Repositório Alice
COCHRANE, T.T.; SANCHEZ, L.G.; AZEVEDO, L.G. de; PORRAS, J.A.; GARVER, C.L..
Titulo em espanhol e portugues: La tierra en America Tropical; A terra na America Tropical v.1. A guide to climate, landscapes and soils for agronomists in Amazonia, the Andean piedmont, Central Brazil and Orinoco; v.2. pt. 1 Legend to the land systems map; pt.2. Individual zones of the land systems map; v.3. Computer summary and soil profile descriptions of the land systems.
Tipo: Livro científico (ALICE) Palavras-chave: America do Sul; Regiao Tropical; Solo; Brasil; Regiao Amazonica; Cerrado; Clima; Mapeamento; Terra; Topografia; Vegetacao; Sistema de terra; Recurso natural; Climate; Vegetation; Topography; Land; Natural resources; Cartography; South America; Tropical zones; Soil; Brazil; Amazonia; Agricultura; Agriculture; Amazon; Amazonas; América Central; América Tropical; Classificação; Cuenca; Cultivo; Guide; Land use; Legenda; Levantamento; Mapa; Orinoco; Perfil do solo; Propriedade físico-química do solo; Recursos naturais; Rio Orinoco; Soil chemicophysical properties; Soil profiles; Soil surveys; Soils; Terra agrícola; Tropical America; Trópicos; Uso da terra.
Ano: 1985 URL: http://www.alice.cnptia.embrapa.br/handle/doc/549413
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Large-Scale Forces Under Surface Gravity Waves at a Wavy Bottom: A Mechanism for the Generation of Primary Microseisms ArchiMer
Ardhuin, Fabrice.
Primary microseisms are background seismic oscillations recorded everywhere on Earth with typical frequencies 0.05 < f < 0.1 Hz. They appear to be generated by ocean waves of the same frequency f, propagating over shallow bottom topography. Previous quantitative models for the generation of primary microseisms considered wave propagation over topographic features with either large scales, equivalent to a vertical point force, or small scales matching ocean wave wavelengths, equivalent to a horizontal force. While the first requires unrealistic bottom slopes to explain measured Rayleigh wave amplitudes, the second produced Love waves and not enough Rayleigh waves. Here we show how the small scales actually produce comparable horizontal and vertical...
Tipo: Text Palavras-chave: Microseisms; Ocean waves; Topography; Sand waves.
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00461/57240/59237.pdf
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Levantamento preliminar de solos do município de Correntina - BA, escala 1: 100.000 (2009). Infoteca-e
LIMA, L. A. DE S.; MARTINS, E. de S.; BRAGA, A. R. dos S.; CASTRO, K. B. de; PASSO, D. P.; CARDOSO, W. dos S.; SANTANA, O. A.; CARVALHO JÚNIOR, O. A. de.; GOMES, R. A. T..
2009
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E) Palavras-chave: Cartografia; Solos; Geomorfologia; Geoprocessamento; Topography; Landscape; SRTM data; Geomorphology; Geotechnology; Mapping; Geoprocessing; Brazil.
Ano: 2009 URL: http://www.infoteca.cnptia.embrapa.br/handle/doc/711886
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Local environmental controls of Atlantic Forest tree community assembly on a coastal continental island in southeastern Brazil Acta Botanica
Nettesheim,Felipe Cito; Garbin,Mário Luís; Pereira,Marcos Gervasio; Araujo,Dorothy Sue Dunn de.
ABSTRACT Tropical forests with high species diversity are commonly found in rugged montane areas. We investigated causes of local tropical forest tree community assembly on a continental island with heterogeneous terrain. We recorded tree community (absolute species abundance), topography, soil, litter and location in 40 sampling units on two opposite sides of the island with similar heterogeneous terrain. We used transformation based Redundancy Analyses and variation partitioning to determine the contribution of environment (topography, soil and litter), spatial structure (geographic location and Moran Eigenvector Maps) and the shared effects of these to explain community assembly. The environment made a significant contribution to explain tree community...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Community composition; Community structure; Floristics; Neutral; Niche; Soil; Spatial structure; Topography; Tropical forest.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062019000100088
Registros recuperados: 40
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