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| Registros recuperados: 21 | |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 >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 |
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| 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 |
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| 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 |
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| 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 |
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| Registros recuperados: 21 | |
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