Consulta: subjectFacets:"Vegetation cover"
Registros recuperados: 20
Data/hora: 01/06/2024 18:20:37

Using Short-Term Monitoring Data to Achieve Goals in a Large-Scale Restoration
Provedor de dados: 7
Autores: Hagen, Dagmar; Norwegian Institute for Nature Research; dagmar.hagen@nina.no; Evju, Marianne; Norwegian Institute for Nature Research; marianne.evju@nina.no.
To evaluate the outcome of restoration projects, an overall goal, reformulated to specific subgoals or targets, must be explicit and translated into scientifically measurable ecological attributes. Monitoring ecological attributes is necessary to assess restoration progress. Data from long-term monitoring are rarely available when restoration interventions are planned and implemented. In this study, we show how short-term monitoring data are incorporated into the planning of the large-scale restoration of a former military training area: the largest restoration project approved in Norway, covering more than 165 km&amp;#178; and intended to enhance nature conservation.   A pilot project was initiated in 2002 that removed 1.2 km of roads and tested three...
Tipo: Peer-Reviewed Reports
Palavras-chave: Adaptive management; Alpine; Ecological attributes; Restoration success; Restoration target; Species richness; Vegetation cover.
Ano: 2013

VEGETATION INDICES FOR IRRIGATED CORN MONITORING
Provedor de dados: 70
Autores: Alvino,Francisco C. G.; Aleman,Catariny C.; Filgueiras,Roberto; Althoff,Daniel; da Cunha,Fernando F.
ABSTRACT Monitoring of large agricultural lands is often hampered by data collection logistics at field level. To solve such a problem, remote sensing techniques have been used to estimate vegetation indices, which can subsidize crop management decision-making. Therefore, this study aimed to select vegetation indices to detect variability in irrigated corn crops. Data were collected in São Desidério, Bahia State (Brazil), using an OLI sensor (Operational Land Imager) embedded to a Landsat-8 satellite platform. Five corn growing plots under central pivot irrigation were assessed. The following vegetation indices were tested: NDVI (Normalized Difference Vegetation Index), EVI (Enhanced Vegetation Index), SAVI (Soil Adjusted Vegetation Index), GNDVI (Green...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Vegetation cover; Decision-making; Remote sensing.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162020000300322

SOIL ATTRIBUTES AND INITIAL CORN DEVELOPMENT AS A FUNCTION OF FERTILIZATION AND INTERCROPPING SYSTEMS
Provedor de dados: 70
Autores: Cortez,Jorge W.; Silva,Rouverson P. da; Furlani,Carlos E. A.; Olszevski,Nelci; Nagahama,Hideo de J.
ABSTRACT Fertilization systems that allow higher sowing speeds have been used in areas of grain production, as well as the use of intercropping to improve soil physical quality and provide better soil cover. This study aimed to evaluate soil attributes and the initial corn development and intercropping (corn + velvet bean, corn + pigeonpea, and corn + bonavist bean) as a function of fertilization systems (pre-sowing and sowing). The experiment was conducted in an Oxisol in a randomized block design in the 2 × 3 factorial scheme, with four replications. The number of days for emergence, plant stand, intercropping dry matter, soil straw cover, soil straw permanence index, penetration resistance, soil moisture, soil density, degree of compaction, and total...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Compaction; Vegetation cover; Soil physical quality.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162019000200257

CLAY AND PHOSPHORUS LOSSES BY EROSION IN OXISOL WITH SUGARCANE RESIDUES
Provedor de dados: 70
Autores: Paula,Daniela T. De; Martins Filho,Marcílio V.; Farias,Vera L. DA S.; Siqueira,Diego S.
ABSTRACT Considering the importance of nutrients in the soil for the plants development and the soil quality conservation and the quantification relevance of them for proper soil management, the aims of this research were: (i) to quantify the clay loss, adsorbed and soluble P from interrill erosion influenced by the presence of sugarcane residues on the ground surface; (ii) to determine the minimum percentage of residues to be maintained on the soil surface to not enrich the eroded sediment by clay and soluble P (Psed) and adsorbed (Pads). The experimental area is located in Guariba - SP, with soil classified as Red Dystrophic Oxisol. The experiment was designed based on results of previous experiments with residue analysis of variance for 40 plots. These...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Interrill erosion; Simulated rainfall; Vegetation cover.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162016000601063

Caracterização de sistemas agroflorestais com o uso de ferramentas de Geoestatística.
Provedor de dados: 14
Autores: AMARAL, E. F. do; OLIVEIRA, T. K. de; BARDALES, N. G.; ARAÚJO, E. A. de; OLIVEIRA, C. H. A. de; SILVA, D. V. da; MORENO, N. M. da C.
O objetivo do presente estudo foi estruturar e avaliar um procedimento metodológico para caracterizar a dependência espacial de variáveis das espécies componentes de sistemas agroflorestais com o uso de ferramentas de geoestatística, permitindo a comparação de diferentes arranjos por meio de indicadores espaciais.
Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E)
Palavras-chave: Sistema agroflorestal (SAF); Agroforestería; Peach palm; Nuez del Brasil; Castanha do brasil; Cubierta vegetal; Geoestadísticas; Projeto Reca; Nova Califórnia (RO); Rondônia; Amazônia Ocidental; Western Amazon; Amazonia Occidental; Agrossilvicultura; Cobertura Vegetal; Cupuaçu; Theobroma Grandiflorum; Pupunha; Bactris Gasipaes; Castanha do Para; Bertholletia Excelsa; Dados Estatísticos; Agroforestry; Brazil nuts; Vegetation cover; Geostatistics.
Ano: 2018
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1091229

Manejo alternativo de plantas espontâneas no cultivo do abacaxizeiro em sistema orgânico de produção.
Provedor de dados: 14
Autores: MATOS, A. P. de; JUNGHANS, D. T.; PADUA, T. R. P. de.
A Embrapa Mandioca e Fruticultura tem obtido diversos avanços nas linhas de pesquisa sobre cultivo de base agroecológica na última década, desenvolvendo sistemas orgânicos de produção para diversas fruteiras, entre elas, o abacaxi. A busca por tecnologias de produção mais sustentáveis no campo tem recebido cada vez mais atenção de instituições de ensino e pesquisa, bem como do setor produtivo, uma vez que a preocupação com o meio ambiente e a procura por alimentos orgânicos são elevados na atualidade. Um dos principais custos para produção de abacaxi nesse sistema de cultivo é o controle de plantas espontâneas principalmente nos primeiros meses após o plantio, que requer grande quantidade de mão de obra, a qual tem se tornado cara em muitas regiões...
Tipo: Folhetos
Palavras-chave: Abacaxi; Agricultura Orgânica; Produção Orgânica; Agricultura Sustentável; Cobertura Vegetal; Vegetação; Pineapples; Organic production; Sustainable agriculture; Cover crops; Vegetation cover.
Ano: 2022
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1144534

Aveia preta para cobertura vegetal do solo EMBRAPA 140 (Campeira-Mor).
Provedor de dados: 14
Autores: GAUDENCIO, C. de A.
Cultivar de aveia preta (Avena strigosa): Embrapa 140 (Campeira-Mor). Origem. Características fenológcias.
Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E)
Palavras-chave: Cobertura do solo; Matéria orgânica; Cobertura vegetal; Solo; Plantio direto; Vegetation cover; Soil organic matter; No-tillage.
Ano: 1998
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/461398

Uso do Lidar como ferramenta para o manejo de precisão em florestas tropicais.
Provedor de dados: 14
Autores: OLIVEIRA, M. V. N. d'.; FIGUEIREDO, E. O.; PAPA, D. de A.
A equipe da Embrapa Acre vem contribuindo, ao longo das últimas duas décadas, para o desenvolvimento de técnicas de manejo florestal adequadas a pequenos e grandes produtores, promovendo a diminuição de custos e aumento dos rendimentos das operações florestais. Nos últimos anos, especialmente pelo uso de geotecnologias, foi possível desenvolver o Modeflora, um conjunto de ferramentas e de técnicas que constituem uma metodologia inovadora de manejo digital de precisão que tem sido adotada por empresários do setor florestal e órgãos governamentais estaduais e federais na gestão de PMF. Com este livro damos mais um passo à frente no manejo de precisão pela incorporação do perfilamento a laser (Lidar - light detection and range) como ferramenta de planejamento...
Tipo: Livro técnico (INFOTECA-E)
Palavras-chave: Geotécnica; Manejo florestal; Plano de manejo florestal; Manejo de precisão; Floresta Estadual do Antimary (AC); Acre; Amazônia Ocidental; Western Amazon; Amazonia Occidental; Bosques tropicales; Madera tropical; Inventario forestal; Teledetección.; Cubierta vegetal; Floresta tropical; Essência florestal; Cobertura vegetal; Inventário florestal; Sensoriamento remoto; Raio laser; Tropical forests; Tropical wood; Vegetation cover; Forest inventory; Remote sensing; Lidar; Lásers.
Ano: 2014
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1029435

Modern palynological record in the Bay of Brest (NW France): Signal calibration for palaeo-reconstructions
Provedor de dados: 5
Autores: Lambert, Clement; Vidal, Muriel; Penaud, Aurelie; Combourieu-nebout, Nathalie; Lebreton, Vincent; Ragueneau, Olivier; Gregoire, Gwendoline.
Modern palynological investigations (pollen and non-pollen palynomorphs) have been carried out for the first time in the entire Bay of Brest (BB; NW France), a semi-enclosed oceanic basin flooded during the Holocene that today is exposed to both marine (North Atlantic surface waters) and fluvial (Aulne and Elorn rivers) influences. Palynological analyses were conducted on 41 surface sediments collected in several mudded bays where low-energy conditions prevail, allowing for fine particle decantation, and also on 12 moss samples considered to be pollen rain collectors taken on the periphery of the BB. Furthermore, the BB allows a direct comparison between landscapes and fossilized pollen assemblages in sediments thanks to relatively small watersheds and...
Tipo: Text
Palavras-chave: Pollen; Dinocyst; Surface sediment; Estuarine dynamics; Vegetation cover.
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00382/49371/49784.pdf

Effects of deforestation on headwater stream fish assemblages in the Upper Xingu River Basin, Southeastern Amazonia
Provedor de dados: 83
Autores: Ilha,Paulo; Rosso,Sergio; Schiesari,Luis.
ABSTRACT The expansion of the Amazonian agricultural frontier represents the most extensive land cover change in the world, detrimentally affecting stream ecosystems which collectively harbor the greatest diversity of freshwater fish on the planet. Our goal was to test the hypotheses that deforestation affects the abundance, richness, and taxonomic structure of headwater stream fish assemblages in the Upper Xingu River Basin, in Southeastern Amazonia. Standardized sampling surveys in replicated first order streams demonstrated that deforestation strongly influences fish assemblage structure. Deforested stream reaches had twice the fish abundance than reference stream reaches in primary forests. These differences in assemblage structure were largely driven...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Arc of Deforestation; Canopy; Land use; Ichthyofauna; Vegetation cover.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252019000100201

Estudios preliminares de la cobertura vegetal en Punta Fort William-Isla Greenwich
Provedor de dados: 20
Autores: Valverde, F.M.; Arcos, F.
Como parte del levantamiento ecológico de Punta Fort Williams, donde se encuentra ubicada la Estación Científica Pedro Vicente Maldonado, se ha iniciado un estudio de la cobertura vegetal de la región con miras a determinar su distribución cuali-cuantitativa. En el presente trabajo se describen cinco especies de musgos reunidas en cuatro familias, y diez y nueve especies de líquenes agrupadas en once familias. Estas especies parecen ser las más comunes y representativas de la región estudiada.
Tipo: Journal Contribution
Palavras-chave: Plant populations; Vegetation cover; Symbiosis; Species diversity; Ecological zonation; Symbiosis; Ecological zonation; Species diversity; Http://aims.fao.org/aos/agrovoc/c_7563; Http://aims.fao.org/aos/agrovoc/c_2465; Http://aims.fao.org/aos/agrovoc/c_33954.
Ano: 1990
URL: http://hdl.handle.net/1834/3872

Synthèse des travaux effectués au CRO sur les végétations envahissantes flottantes (1985-1990): propositions et recommandations
Provedor de dados: 20
Autores: Bard, F. X.; Guiral, D.; Amon Kothias, J.B.; Koffi, K. Ph.
Lors de cette période, une série d'actions a été menée, visant à la lutte contre les végétations flottantes en lagune Ebrié. Les résultats obtenus sont importants, bien que l'on puisse reprocher à ces actions un certain manque de coordination. Le bilan peut être fait ainsi: le suivi des différentes phases d'envahissement indique bien que la cible principale est désormais la jacinthe d'eau (Eichhornia crassipes). L'espèce Pistia stratiotes, endémique, ne constitue pas une véritable menace. S. molesta, qui a été menaçante, reste actuellement cantonnée à quelques zones oligohalines de la lagune Ebrié, la concurrence de la jacinthe d'eau ayant fortement réduit son extension en zones dulçaquicoles. L'introduction de l'insecte phytophage spécifique Cyrtobagous...
Tipo: Journal Contribution
Palavras-chave: Vegetation cover.
Ano: 1991
URL: http://hdl.handle.net/1834/5164

Inventario de la flora y vegetación en cayos de la región central del golfo  de Ana María, Cuba
Provedor de dados: 20
Autores: Acevedo Rodríguez, C.J.
Con el objetivo de inventariar la flora y vegetación presente en la región central del golfo de Ana María, Ciego de Ávila, Cuba,  se realizaron colectas de campo, revisiones bibliográficas y la consulta de materiales de herbarios. Se listaron un total de 47  plantas vasculares, agrupadas en 43 géneros y 25 familias. Cayo Algodón Grande constituyó la localidad de mayor diversidad,  la cual estuvo en correspondencia con la extensión superficial del territorio. En el área de estudio se registraron  tres  formaciones vegetales, siendo el bosque de mangle la de mayor representatividad.
Tipo: Journal Contribution
Palavras-chave: Cays; Marine plants; Vegetation cover.
Ano: 2012
URL: http://hdl.handle.net/1834/4639

Cobertura vegetal en las áreas circundantes a la Estación Pedro Vicente Maldonado
Provedor de dados: 20
Autores: Sócola, J.
Durante la VIII Expedición Antártica Ecuatoriana se llevó a cabo un estudio de la cobertura vegetal en Punta Fort Willams, Isla Greenwich. Los objetivos planteados fueron: Conocer el estado actual de  la vegetación, determinar la abundancia, dominación y frecuencia a través de la cobertura vegetal, así como la riqueza florística de las comunidades vegetales, para poder establecer si sufren impactos debido a las actividades antropogénicas. Se marcaron seis zonas de vegetación y se encontraron un total de 36 especies de líquenes distribuidos  en 13 familias y cuatro especies de musgos pertenecientes a cuatro familias.
Tipo: Journal Contribution
Palavras-chave: Abundance; Polar zones; Vegetation cover; Antarctic zone.
Ano: 2002
URL: http://hdl.handle.net/1834/3824

Biodiversidad vegetal acuática de los humedales del río Chepu (Chiloé, Región de Los Lagos, Chile)
Provedor de dados: 20
Autores: González López, C.A.
Se estudió la biodiversidad vegetal acuática y palustre de la Laguna Coluco que forma parte de los Humedales del río Chepu (Chiloé, Chile). La hoya hidrográfica del río Chepu comprende la laguna Coluco y los tributarios de la cuenca: ríos Huentru, Negro, Puntra, Grande, Coluco, abarcando aproximadamente 100 km^2. Los muestreos de terreno se realizaron con la metodología fitosociológica de la Escuela Zürich – Montpellier. Con los censos de vegetación levantados a lo largo del transecto, se confeccionó una tabla fitosociológica inicial con 120 censos y 88 especies vegetales. Esta tabla fue ordenada con los métodos tradicionales, lográndose determinar las 16 asociaciones siguientes: Myriophylletum aquaticum, Potametum pectinatii, Juncetum bulbosii, Potametum...
Tipo: Theses and Dissertations
Palavras-chave: Biodiversity; Community composition; Wetlands; Vegetation cover; Aquatic plants.
Ano: 2005
URL: http://hdl.handle.net/1834/4916

Les îlots forestiers au sud du Togo : Dynamique et relations avec les végétations périphériques
Provedor de dados: 20
Autores: Kokou, K.; Caballé, G.; Akpagana, K.; Batawila, K.
Cette étude traite des relations floristiques et dynamiques entre îlots forestiers et végétations périphérique dans la plaine côtière du sud du Togo. Les îlots forestiers sont essentiellement des fôrets sacrées et des forêts "pare-feu" à proximité des villages.  Des relations évidentes ont été  établies entre les îlots forestiers et les végétations périphériques : 1) phytogéographique, 51,8 % des espéces des îlots et 32,4 % des espèces des végétations périphérique sont d'origine forestière; 2) floristique, 870 espèces ont été recensées dont 649 dans les îlots et 610 dans leurs environs. 373 espèces leur sont communes....
Tipo: Journal Contribution
Palavras-chave: Coastal zone; Vegetation cover.
Ano: 1999
URL: http://hdl.handle.net/1834/1253

Soil infiltration based on bp neural network and grey relational analysis
Provedor de dados: 90
Autores: Juan,Wang; Pute,Wu; Xining,Zhao.
Soil infiltration is a key link of the natural water cycle process. Studies on soil permeability are conducive for water resources assessment and estimation, runoff regulation and management, soil erosion modeling, nonpoint and point source pollution of farmland, among other aspects. The unequal influence of rainfall duration, rainfall intensity, antecedent soil moisture, vegetation cover, vegetation type, and slope gradient on soil cumulative infiltration was studied under simulated rainfall and different underlying surfaces. We established a six factor-model of soil cumulative infiltration by the improved back propagation (BP)-based artificial neural network algorithm with a momentum term and self-adjusting learning rate. Compared to the multiple...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Rainfall intensity; Vegetation cover; Soil permeability; Sensitivity analysis.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832013000100010

Hormesis method for increasing oat straw with a view to viability of direct-seeding systems1
Provedor de dados: 124
Autores: Tavares,Leandro Augusto Felix; Sousa,Saulo Fernando Gomes; Correia,Tiago Pereira da Silva; Silva,Paulo Roberto Arbex; Velini,Edivaldo Domingues.
In conservation agriculture, mainly under direct seeding, maintaining the vegetation ground cover is essential, since this serves as a reservoir of nutrients which are slowly released to plants by microorganisms. Some authors have sought to study increases in the amount of straw in the soil, in addition to slowing down the process of decomposition, with hormesis being one of the techniques used. This technique states that all chemical substances are both poisonous and nonpoisonous, with only the dosage determining whether they are lethal or not. This study aimed to evaluate the dry weight and agronomic characteristics of a crop of black oat subjected to hormesis. The experimental design was of randomised blocks, with 12 treatments and 4 replications,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Sustainability; Vegetation cover; Direct-seeding systems.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902015000100048

São Paulo urban heat islands have a higher incidence of dengue than other urban areas
Provedor de dados: 55
Autores: Araujo,Ricardo Vieira; Albertini,Marcos Roberto; Costa-da-Silva,André Luis; Suesdek,Lincoln; Franceschi,Nathália Cristina Soares; Bastos,Nancy Marçal; Katz,Gizelda; Cardoso,Vivian Ailt; Castro,Bronislawa Ciotek; Capurro,Margareth Lara; Allegro,Vera Lúcia Anacleto Cardoso.
Urban heat islands are characterized by high land surface temperature, low humidity, and poor vegetation, and considered to favor the transmission of the mosquito-borne dengue fever that is transmitted by the Aedes aegypti mosquito. We analyzed the recorded dengue incidence in Sao Paulo city, Brazil, in 2010-2011, in terms of multiple environmental and socioeconomic variables. Geographical information systems, thermal remote sensing images, and census data were used to classify city areas according to land surface temper- ature, vegetation cover, population density, socioeconomic status, and housing standards. Of the 7415 dengue cases, a majority (93.1%) mapped to areas with land surface temperature &gt;28 ◦ C. The dengue incidence rate (cases per 100,000...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Urban heat islands; Land surface temperature; Vegetation cover; Dengue; Aedes aegypti.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702015000200146

Spatial distribution of Canola culture in the State of Paraná (Brazil) between the agricultural years of 2005 and 2009
Provedor de dados: 118
Autores: Costa Wrublack,Suzana; Prudente,Victor H.R.; Mercante,Erivelto; Machado Coelho,Sílvia R.
S.C. Wrublack, V.H.R. Prudente, E. Mercante, and S.R.M Coelho. 2013. Spatial distribution of Canola culture in the State of Paraná (Brazil) between the agricultural years of 2005 and 2009. Cien. Inv. Agr. 40(3): 513-521. There are a number of crops that are viable for small farms. To increase our knowledge of the occurrence of canola cultivation in the State of Paraná, the present study aimed to identify the areas sown with canola (ha) and to examine canola production (t) during the growing seasons of 2005 to 2009. The methodology involved a literature review and analysis of spatial data from the Secretaria da Agricultura e do Abastecimento do Paraná (SEAB/PR). We used the software ArcGis 9.3 for elaboration of thematic maps of variables as well as the...
Tipo: Journal article
Palavras-chave: Spatial analysis; Spatial correlation; Statistic for areas; Vegetation cover.
Ano: 2013
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202013000300005