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Pesquisa : G16.500.275.157.812 [Categoria DeCS]
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Id: biblio-1039127
Autor: Azevedo, Joaquim Alexandre Moreira; Barros, Alexandre Bomfim; Miranda, Paulo Rogério Barbosa de; Costa, João Gomes da; Nascimento, Velber Xavier.
Título: Biomonitoring of Heavy Metals (Fe, Zn, Cu, Mn, Cd and Cr) in Oysters: Crassostrea rhizophorae of Mangrove Areas of Alagoas (Brazil)
Fonte: Braz. arch. biol. technol;62:e19180211, 2019. tab, graf.
Idioma: en.
Resumo: Abstract Mangroves are tropical and subtropical flooded forests that generally develop in estuarine areas over unstable sediments protected from the action of waves in the intertidal zone with an environment characterized by a great diversity of fauna and flora. Thus, the present study aimed to evaluate the levels of heavy metals that are absorbed by mangrove oysters, in estuarine systems in the Alagoas coast by determining the concentrations of Fe, Cu, Mn, Zn, Cd and Cr. Two areas, which consisted of both a collection during the rainy season and the dry season, were selected for sampling of mangrove oysters. In each collection, seven samples were collected, at seven different points, where each sample contained four oysters. In the laboratory the oysters were dried at 105°C for 72 hours and then macerated. It was then digested with 10 ml of a solution comprising a combination of 4:1 nitric acid and hydrochloric acid, initially in 1h at 40°C, followed by 3 hours at 140°C. In General, the medians followed the order Zn > Fe > Mn > Cu > Cr > Cd in MMELC and Zn > Cu > Fe > Mn > Cr > Cd in Meirim River. It is concluded that the Crassostrea rhizophorae oysters from the studied environments presented concentrations of all the metals proposed in the research and demonstrates its accumulating and bioindicator character.
Descritores: Ostreidae
Metais Pesados/análise
Áreas Alagadas
-Brasil
Responsável: BR1.1 - BIREME


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Id: biblio-1253080
Autor: Liu, Fei; Qu, Yun-Kun; Geng, Chao; Wang, Ai-Ming; Zhang, Jia-Hong; Li, Jin-Feng; Chen e, Kai-Jian; Liu, Bo; Tian, Hong-Yan; Yang, Wen-Ping; Yu, Ye-Bing.
Título: Analysis of the population structure and genetic diversity of the red swamp crayfish (Procambarus clarkii) in China using SSR markers
Fonte: Electron. j. biotechnol;47:59-71, sept. 2020. tab, ilus, graf.
Idioma: en.
Projeto: Jiangsu Province Agricultural Science and Technology Independent Innovation Fund Project; . Jiangsu Agricultural Industry Technology System (Red Swamp Crayfish; . China Agriculture Research System; . Yancheng Institute of Technology Talent Introduction Project; . Jiangsu Science and Technology Project - Northern; . Jiangsu Science and Technology Special Project.
Resumo: BACKGROUND: Procambarus clarkii produces high-quality, delicious meat that is high in protein, low in fat, and rich in calcium and phosphorus. It has become an important aquatic resource in China. Our objectives are (i) to analyze the level of genetic diversity of P. clarkii populations; (ii) to explore the genetic differentiation (Gst); and (iii) to propose appropriate strategies for the conservation. RESULTS: In this study, Shannon's index (I) and Nei's gene diversity index (H) for P. clarkii were high (I = 0.3462 and H = 0.2325 on average and I = 0.6264, H = 0.4377 at the species level) based on the SSR markers. The expected heterozygosity value of 17 microsatellite loci in 25 crayfish populations was 0.9317, the observed heterozygosity value was 0.9121, and the observed number of alleles per locus was 2.000; and the effective number of alleles per locus was 1.8075. Among the P. clarkii populations, the inbreeding coefficient within populations (Fis) was 0.2315, overall inbreeding coefficient (Fit) was 0.4438, genetic differentiation coefficient among populations (Fst) was 0.3145 and gene differentiation (Gst) was 0.4785 based on SSR analyses. The cluster analysis results obtained by unweighted pair-group method with arithmetic mean (UPGMA) analysis, principal coordinate analysis (PCoA) and STRUCTURE analysis were similar. A mantel test showed that the isolation-by-distance pattern was not significant. CONCLUSIONS: The high Gst among P. clarkii populations is attributed to genetic drift and geographic isolation. The results indicated that more P. clarkii populations should be collected when formulating conservation and aquaculture strategies.
Descritores: Variação Genética
Repetições de Microssatélites
Astacoidea/genética
-Filogenia
China
Reação em Cadeia da Polimerase
Aquicultura
Ambiente Aquático
Áreas Alagadas
Triagem de Portadores Genéticos
Limites: Animais
Responsável: CL1.1 - Biblioteca Central


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Id: biblio-1284102
Autor: Marins, Rozangela Pereira.
Título: Condições de vida dos catadores de caranguejos: uma proposta de educação ambiental em Vitória - (ES) / Living conditions of the crab catchers in the municipal district of Vitória, state of Espírito Santo.
Fonte: São Paulo; s.n; 2005. 136 p.
Idioma: pt.
Tese: Apresentada a Universidade de São Paulo. Faculdade de Saúde Pública para obtenção do grau de Mestre.
Resumo: A presente pesquisa, foi realizada no município de Vitória (ES), com a participação de 100 catadores de caranguejos, que atuavam diretamente nessa atividade. Teve como objetivo realizar a caracterização sócio-econômica-cultural e ecológica dos catadores de caranguejos, avaliar os agravos de saúde decorrentes das atividades desenvolvidas e levantar aspectos relacionados à captura do caranguejo que interferem no meio ambiente, visando a conservação do ecossistema manguezal do Município de Vitória. Para a coleta dos dados foram utilizadas entrevistas com formulários contendo questões abertas e fechadas para levantamento dos dados pessoais, familiares e profissionais dos catadores de caranguejo e entrevista com anamnese para levantamento e fichamento dos dados sobre a saúde dos catadores de caranguejo. Entre os resultados obtidos destacam-se a composição do grupo, que era composto exclusivamente por homens, as faixas etárias mais significativas foram entre 28 e 38 anos (38%) e eram também os que detiam a experiência, "o saber popular" e portanto sob este aspecto podem ser considerados como a "população tradicional dos mangues". Grande parte das queixas verificadas durante a avaliação física estão diretamente relacionadas com o esforço despendido na locomoção, captura e transporte dos caranguejos dentro do manguezal. Constatou-se o desconhecimento sobre os cuidados básicos da higiene bucal (95% apresentaram doença periodontal). Em relação ao exame audiométrico 3 (7,5%) apresentaram uma perda auditiva significante, que pode estar associada à utilização de óleo diesel (solvente) no corpo. O resultado do estudo contribuirá, na implantação de medidas efetivas de gestão compartilhada para o município de Vitória, utilização sustentada de seus ecossistemas e melhoria das condições de vida dos catadores de caranguejos.

The present work, carried out in the municipal district of Vitória, state of Espírito Santo, counted with the participation of 100 crab catchers that directly practice their working activity. Its main objectives were to search for the social, economical, cultural and environmental characteristics of those workers, evaluate the problems derived from the activity they perform, and point out aspects related to the catching of crabs that interfere in the environment. These objectives aimed to keep the marsh ecosystem of the municipal district. The data collection was done through interviews during which a questionnaire containing open and closed questions was answered. Its objective was to survey personal, familiar, and professional information about those workers. In addition to that, an interview with anamnesis was carried out in order to keep their files and health state. Among the findings the group composition could be pointed out. It was exclusively composed by men with the age ranging from 28 to 38 years (38%), and those were the ones with much experience - they can be considered "the traditional marsh population" according to a popular saying. Most of the complaints registered during the physical evaluation were directly related to the strength used in the moving, catching and transportation of the crabs in the marshes. There was no knowledge about basic oral hygiene (95% presented Periodontal Disease). As for the Audiometric Exam, 3 catchers (7.5%) showed significant hearing loss, what could be associated to the use of diesel oil (solvent) in the body. Those findings will contribute to the implementation of effective measures of sharing management for the district, to the sustainable use of its ecosystem and resources, as well as to the improvements of the crab catchers' living conditions.
Descritores: Condições Sociais
Saúde Ambiental
Educação em Saúde Ambiental
Áreas Alagadas
Promoção da Saúde
Responsável: BR67.1 - CIR - Biblioteca - Centro de Informação e Referência


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Id: biblio-1120437
Autor: Ortíz-Aldana, José R; Martínez-Dubón, Rebeca M.
Título: Diversidad malacológica del humedal marino-costero Las Lisas-La Barrona en el Pacífico de Guatemala / Malacological diversity of the Las Lisas-La Barrona marine coastal wetland in the Pacific of Guatemala
Fonte: Cienc. tecnol. salud;7(1):62-77, 2020. ilus.
Idioma: es.
Resumo: Los moluscos son uno de los grupos faunísticos dominantes en ambientes estuarinos con bosque de manglar como el humedal Las Lisas-La Barrona. Forman parte de la transferencia de energía a través de las redes tróficas y contribuyen a la estructuración de los hábitats bénticos. El humedal Las Lisas-La Barrona se ubica en el litoral Pacífico de Guatemala. Se determinó la diversidad de la comunidad de moluscos, así como su relación con los parámetros fisicoquímicos del agua. Se realizaron ocho muestreos (enero a agosto) en 2017, utilizando parcelas con un área de 16 m2 en seis sitios de bosque de manglar y cuatro sitios en el canal estuarino, distribuidos en el humedal. La riqueza de moluscos del humedal está comprendida por 26 especies correspondientes a 18 familias y 22 géneros. Las especies más abundantes de gasterópodos fueron Cerithideopsis californica (Adams, 1852) y Littoraria fasciata (Gray, 1839) y de bivalvos Iliochione subrugosa (Wood, 1828) y Larkinia grandis (Broderip & Sowerby, 1829). Los sitios correspondientes a bosque de manglar presentaron una mayor cantidad de moluscos, principalmente gasterópodos. La distribución de las especies dominantes, no está dada por los factores fisicoquímicos del agua, pudiendo ser otros factores como la disponibilidad de hábitat y alimento los que rijan su distribución dentro del humedal. Algunos factores como la influencia de agua marina dentro del humedal, las altas concentraciones de oxígeno disuelto y pH ligeramente básicos, así como la calidad del agua en general, hacen del humedal Las Lisas-La Barrona un área muy diversa en cuanto a especies de moluscos.

Molluscs are one of the dominant faunistic groups in estuarine environments with mangrove forests such as the Las Lisas-La Barrona wetland. They are part of the transfer of energy through trophic networks and contribute to the structuring of the benthic habitats. The Las Lisas-La Barrona wetland is located on the Pacific coast of Guatemala. The diversity of the mollusk community, as well as its relationship with the physicochemical parameters of the water was determined. Eight samplings were carried out (January to August) in 2017, using parcels with an area of 16 m2 in six mangrove forest sites and four sites in the estuarine channel, distributed along the wetland. The mollusk richness of the wetland is comprised of 26 species corresponding to 18 families and 22 genera. The most abundant species of gastropods were Cerithideopsis californica (Adams, 1852) and Littoraria fasciata (Gray, 1839) and bivalves Iliochione subrugosa (Wood, 1828) and Larkinia grandis (Broderip & Sowerby, 1829). The sites corresponding to mangrove forest, presented a greater amount of mollusks, mainly gastropods. The distribution of dominant species is not given by the physicochemical factors of the water, being able to be other factors such as the availability of habitat and food that govern their distribution within the wetland. Some factors such as the influence of seawater in the wetland, the high concentrations of dissolved oxygen and the slightly basic levels of pH, as well as water quality in general, make the Las Lisas-La Barrona wetland a very diverse area in terms of mollusk species
Descritores: Costa
Fauna Bentônica/análise
Áreas Alagadas
-Qualidade da Água
Bivalves
Estuários
Gastrópodes
Moluscos/classificação
Limites: Animais
Responsável: GT49.1


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Id: biblio-1095851
Autor: Dávila-Pérez, Celia V; García, Manolo J; Velásquez-Jofre, Pilar M.
Título: Aporte al conocimiento de la conectividad del manglar de Las Lisas-La Barrona, Guatemala / Contribution to knowledge of mangrove connectivity of Las Lisas-La Barrona, Guatemala
Fonte: Cienc. tecnol. salud;6(2):107-119, jul dic 2019. ilus.
Idioma: es.
Resumo: El presente estudio es una primera aproximación al conocimiento de la conectividad del ecosistema manglar de Las Lisas-La Barrona, departamentos de Santa Rosa y Jutiapa. La conectividad es la característica del pai¬saje que facilita la dispersión de las especies a través del hábitat, la pérdida de esta conectividad, podría poner en peligro la sobrevivencia de las poblaciones de aves. El objetivo de este estudio fue determinar la conectividad del manglar a través de análisis basados en las teorías de grafos y circuitos. Se incluyó en el análisis la conectividad en sus componentes estructural y funcional. El componente estructural se determinó mediante el Análisis del Patrón Espacial Morfológico (MSPA por sus siglas en inglés). El componente funcional fue evaluado con el Diferencial del êndice Integral de Conectividad (dIIC), evaluando el aporte de cada parche a la conectividad del manglar. Se encontró que la conectividad del área está determinada por parches noecleo con alto aporte a la conectividad como los parches de vegetación de mangle de La Barrona y El Jiote, parche puente o corredor como el canal de Chiquimulilla y un cuello de botella en el segmento Las Lisas-El ahumado, los cuales son elementos estratégicos a considerar en la planificación e intervenciones futuras en el área.

The present study is a first approach to the knowledge of the connectivity of the mangrove ecosystem of Las Lisas-La Barrona. Connectivity is the landscape characteristic that facilitates the dispersion of species through habitat, the loss of this connectivity, could endanger the survival of bird populations. The objective was to estimate mangrove connectivity through analysis based on the graphs and circuits theories. The connectivity was estima¬ted on its structural and functional components. The structural component was determined by a Morphological Spatial Pattern Analysis (MSPA). The functional component was assessed with the Differential of the Integral Connectivity Index (dIIC), evaluating the contribution of each patch to the mangrove connectivity. It was found that the connectivity of the area is determined by cores patches with high contribution to connectivity such as the mangrove vegetation patches of La Barrona and El Jiote, bridges or corridors such as the canal de Chiquimulilla and a bottleneck in the Las Lisas - El Ahumado segment, which are strategic elements to consider in planning and future interventions in the area.
Descritores: Biodiversidade
Áreas Alagadas
-Dispersão Vegetal
Responsável: GT49.1


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Id: biblio-868825
Autor: Nereida, Marroquín; Cruz, Sully M.
Título: Actividad biológica y caracterización química de los extractos de las hojas y corteza de Rhizophora mangle L / Biological activity and chemical characterization of leaves and bark extracts of Rhizophora mangle L
Fonte: Cienc. tecnol. salud;3(1):55-64, ene.-jun. 2016. tab.
Idioma: es.
Resumo: La corteza de Rhizophora mangle L., mangle rojo, ha sido utilizado tradicionalmente por sus propiedades como antiséptico, astringente y hemostático, se ha descrito la presencia de polifenoles como flavonoides y taninos, a los cuales se les ha relacionado con su acción antioxidante y cicatrizante demostrada en diferentes estudios; por su parte las hojas han presentado taninos y actividad antioxidante muy similar, y en ocasiones superior, a la reportada para la corteza. En este estudio se determinó la cantidad de taninos, flavonoides, actividad antioxidante y antibacteriana de cinco extractos etanólicos de hoja y corteza de mangle rojo, colectado en cinco transectos de la Reserva Natural de Usos Múltiples Monterrico Santa Rosa, Guatemala; se analizaron los datos con base en los promedios y desviaciones estándar de cada uno de los parámetros evaluados. En los extractos de hojas se determinó un 15.91±8.56% de taninos, 315.19±90.83ppm de flavonoides, actividad antioxidante a una concentración inhibitoria media (CI50) de 0.435±0.315mg/mL, 125.44±65.05μg de ácido gálico/g de extracto y actividad antibacterianacontra Staphylococcus aereus ATCC 6538, S. epidermidis ATCC 14990 y S. epidermidis aislada de herida con unaconcentración mínima inhibitoria (CIM) de 1 mg/mL; siendo estos datos similares a los de corteza. Se obtuvo uncoeficiente de correlación de -.79, entre la cantidad de taninos y actividad antioxidante (p < .001); lo cual relaciona su composición química con su posible efecto cicatrizante, por lo que los extractos de hoja pueden constituir unaalternativa viable para el desarrollo de productos naturales.

The Rhizophora mangle L. cortex, red mangrove, has a traditional use due to its antiseptic, astringent and hemostaticproperties; it has been described the content of polyphenols mainly as flavonoids and tannins, withantioxidant and wound healing properties, demonstrated in various studies, meanwhile the leafs presents tannins and similar antioxidant activity, sometimes, superior to the cortex activity. In this study, the amount of tannins, flavonoids, antioxidant and antibacterial activity of five ethanol extracts of leaf and cortex of red mangrove were determined; the samples were collected in the nature reserve multipurpose Monterric o, Santa Rosa, Guatemala; the data was analyzed based on the averages and standard deviations of each of the parameters evaluated. Inleaf extracts were quantified 15.91±8.56% of tannins, flavonoids 315.19±90.83 ppm, antioxidant activity of IC50 0.435±0.315mg/mL, total phenols of 125.44±65.05 μg gallic acid/ g of extract and antibacterial activity against Staphylococcus aureus ATCC 6538, S. epidermidis ATCC 14990 and S. salvaje with a MIC of 1 mg/mL, beingcomparables as those of the cortex. A correlation of -.79 was obtained, between the amount of tannins and antioxidant activity (p <.001); relating the results to a possible biological wound healing effects, consequently the leafextracts can become a viable option to the development of medicinal natural products.
Descritores: Antibacterianos
Antioxidantes
Folhas de Planta
Áreas Alagadas
Responsável: GT49.1


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Id: lil-734997 LILACS-Express
Autor: Álvarez-León, Ricardo; Avendaño-Remolina, Darío; Sanjuan-Muñoz, Adolfo M.
Título: La relación entre peltigera sp. y rhizophora magle en arroyo de plata (Bolívar), caribe Colombiano / The relationhip between peltigera sp. and rhizophora manglein arroyo de pllata (bolivar), Colombian caribbean region
Fonte: Rev. luna azul;(38):105-121, ene.-jun. 2014. ilus, tab.
Idioma: es.
Resumo: Objetivo: determinar la distribución y el estado de los rodales de manglar en Arroyo de Plata (Departamento de Bolívar). Metodología: se realizaron labores de campo a través del arbolado, mediante el muestreo biológico de la flora y de los parámetros físicos y químicos del agua y de los suelos a lo largo de transectos dentro del bosque. Resultados: la composición del rodal incluye cinco especies, Rhizophora mangle (mangle rojo, colorao o colorado), Avicennia germinans (mangle salado, prieto, negro o iguanero), Laguncularia racemosa (mangle blanco, amarillo o bobo), Conocarpus erecta (mangle zaragoza) y Pelliciera rhizophorae (mangle piñuelo). Asociado a la especie pionera (R. mangle) se encontró el líquen (Peltigera sp.), cuya relación se lleva a cabo solo cuando el mangle está en estado de degradación y los parámetros fisicoquímicos de las aguas y los suelos, son extremos. Conclusión: Los manglares mostraron características mixtas, tipo maduro ribereño y de cuenca, donde la especie invasora P. rhizophorae presenta el mayor IVI, debido a su alta densidad. El registro de los líquenes Peltigera sp. y su presencia en los manglares del Caribe colombiano no solo es el primero para esta Región, su distribución puede estar restringida a la zona costera, es incidental, y demuestra su gran capacidad de adaptación a los cambios ambientales, y puede ser considerada entre los en bio-indicadores de las características ambientales, especialmente de las alteraciones actuales de los suelos y las aguas.

Objective: To determine the distribution and status of mangrove stands in Arroyo de Plata (Department of Bolívar). Methodology: Field work was conducted through woodland, using biological sampling of the flora and the physical and chemical parameters of water and soil along transects within the forest. Results: The composition of the stand includes five species, Rhizophoramangle (red, colorao or colorado mangrove), Avicenniagerminans (salty, dark color, black or iguanero mangle) Laguncularia racemosa (white, yellow or bobo mangrove), Conocarpus erecta (zaragoza mangle) and Pelliciera rhizophorae (tea mangrove). The lichen (Peltigera sp), was found associated with the pioneer species (R. mangrove) whose relationship is carried out only when the mangrove is in a state of degradation and the physical-chemical parameters of water and soil, are extreme. Conclusion: Mangroves showed mature coastal basin type mixed characteristics, where the invasive species P. rhizophorae has the highest IVI due to its high density. Registration of Peltigera sp lichens and its presence of the Colombian Caribbean mangrove is not only the first for this region, its distribution may be restricted to the coastal zone, it is incidental and demonstrates its ability to adapt to environmental changes, and can be considered between the bio-indicators of environmental characteristics, especially of the the current alterations of soil and water.
Descritores: Líquens
-Região do Caribe
Rhizophoraceae
Áreas Alagadas
Limites: Humanos
Tipo de Publ: Artigo Clássico
Responsável: CO54.1 - Centro de Biblioteca e Información Científica


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Id: lil-735007 LILACS-Express
Autor: Flórez Yepes, Gloria Yaneth; Alzate Álvarez, Ángela María; Rincón Santamaría, Alejandro.
Título: Participación comunitaria para la construcción e lineamientos de uso y conservación de humedales altoandinos. experiencia piloto en el sector el ocho y páramo de letras / Communty particiipation in the construction of guidelies for the use and conservation of the high andean wetlands, a pilot experience in the ocho and páramo de letras arass
Fonte: Rev. luna azul;(38):274-296, ene.-jun. 2014. ilus, tab.
Idioma: es.
Resumo: La participación comunitaria es un aspecto relevante en la toma de decisiones para la implementación de acciones relacionadas con la protección del patrimonio natural. Objetivo: En el presente trabajo el principal objetivo es la construcción participativa de los lineamientos de uso y conservación de humedales en el sector El Ocho y Páramo de Letras. Método: La metodología comprende los siguientes pasos: 1) revisión de información secundaria; 2) una zonificación ambiental participativa de los sistemas productivos mediante la técnica de mapas parlantes, con la ayuda de la herramienta de AutoCAD; y 3) análisis del potencial turístico y florístico con base en los saberes tradicionales, y utilizando entrevistas con la comunidad, potenciales turistas y charlas informales. Resultado principal: La comunidad tiene conocimiento tradicional de los beneficios que ofrecen los recursos del ecosistema, pero no tiene las herramientas para lograr un sistema productivo sostenible; la zona de estudio tiene un gran potencial turístico, debido a las ventajas de paisaje e infraestructura; el uso actual del suelo es inadecuado con respecto a la normatividad ambiental. Conclusión principal: Es necesario formular e implementar estrategias de uso y conservación de humedales altoandinos que sean adecuados a las particularidades del ecosistema bajo estudio, puesto que las estrategias existentes a nivel nacional e internacional son muy generales.

Community participation is a relevant aspect in decisions making concerning the implementation of actions related to protection of natural heritage. In the present work, the main purpose is the participative construction of the guidelines for the use and conservation of wetlands in El Ocho and Páramo de Letras. The methodology includes the following steps: 1) review of secondary information; 2) a participatory environmental zoning of the productive systems using the talking maps technique and the AutoCAD tool; and 3) floral and touristic potential analysis, on the basis of traditional knowledge, by means of interviews to the community, potential tourists and informal talks. The main result of this research indicates that the community has traditional knowledge of the benefits offered by the ecosystem resources, but they do not have the necessary tools to achieve a sustainable productive system. The study area has a great touristic potential, due to its advantages of landscape and infrastructure but the current use of the land is inadequate according to the environmental law. The main conclusion of the work is that it is necessary to formulate and implement strategies for use and conservation of High Andean Wetlands which are adequate for the ecosystem under study, as the current national and international strategies are too general.
Descritores: Áreas Alagadas
-Ecossistema
Conservação dos Recursos Naturais
Turismo
Limites: Humanos
Tipo de Publ: Artigo Clássico
Responsável: CO54.1 - Centro de Biblioteca e Información Científica


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Texto completo SciELO Costa Rica
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Id: biblio-1003336
Autor: Veas-Ayala, Néstor; Quesada-Román, Adolfo; Hidalgo, Hugo G; Alfaro, Eric J.
Título: Humedales del Parque Nacional Chirripó, Costa Rica: características, relaciones geomorfológicas y escenarios de cambio climático / Wetlands of the Chirripó National Park, Costa Rica: characteristics, geomorphological relationships and climate change scenarios
Fonte: Rev. biol. trop;66(4):1436-1448, oct.-dic. 2018. tab, graf.
Idioma: es.
Resumo: Resumen Los humedales, también llamados altoandinos, han sido poco estudiados y caracterizados en Costa Rica. En este estudio se analizan las características geomorfológicas, climatológicas e hidrológicas de los humedales altoandinos del Parque Nacional Chirripó (PNCh), ubicado al centro-sur de Costa Rica, América Central. Para ello se parte de un levantamiento geomorfológico a escala 1:25 000 de formas de relieve particularmente de origen glaciar, el Inventario Nacional de Humedales llevado a cabo por el Proyecto Humedales (PNUD-SINAC-GEF), y la determinación de distintos escenarios de cambio climático para los periodos 2039-2059 y 2079-2099. El objetivo de este trabajo es caracterizar el estado actual de estos ecosistemas, explicar cómo y porqué se forman, así como valorar las posibles implicaciones en el ciclo hidrológico y la provisión de agua de estos reservorios debido a las variaciones del clima a futuro. Los resultados denotan la gran importancia de estos humedales para mantener la dinámica ecológica en el PNCh, así como los servicios de provisión de agua y regulación del ciclo hidrológico en las cuencas que derivan de esta área protegida.(AU)

Abstract The geomorphological, climatological and hydrological characteristics of the high Andean wetlands of the Chirripó National Park (PNCh) are analyzed. The PNCh is located in south-central Costa Rica, Central America. This analysis includes a geomorphological survey on a 1: 25 000 scale of the relief forms and processes, particularly those of glacial origin. The National Wetland Inventory carried out by the Wetlands Project (UNDP-SINAC-GEF) was also used, along with different climate change projections corresponding to the scenarios for the 2039-2059 and 2079-2099 horizons. The main objective is to characterize the current state of these ecosystems, to explain how and why they are formed, as well as to assess the possible implications in the hydrological cycle and the water supply of these wetlands due to future climate variations. The results showed the relevance of these natural reservoirs in maintaining the ecological dynamics of the PNCh. We also studied the services of water provision and regulation of the hydrological cycle in the basins that compose this protected area.(AU)
Descritores: Mudança Climática
Ecossistema
Geomorfologia
Áreas Alagadas
-América Central
Responsável: BR1.1 - BIREME


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Id: lil-393849
Autor: Santos, Silvio Roberto Miranda dos; Miranda, Izildinha de Souza; Tourinho, Manoel Malheiros.
Título: Estimativa de biomassa de sistemas agroflorestais das várzeas do rio juba, Cametá, Pará / Biomass estimation of agroforestry systems of the Juba river floodplain in Cametá, Pará
Fonte: Acta amaz;34(1):1-8, 2004. mapas, tab.
Idioma: pt.
Resumo: Este trabalho apresenta uma estimativa da biomassa seca (BS) acima do solo e estoque de carbono (EC) de sistemas agroflorestais (SAF) estudados nas várzeas do rio Juba, Cametá, Pará. A BS foi estimada pelo método indireto a partir dos dados de um inventário florestal realizado em sete parcelas de 0,25 ha (50 m x 50 m). Foram inventariados em média 2594 indivíduos/ha com DAP >5 cm. Euterpe oleracea Mart.(açaí) e Theobroma cacao L. (cacau), foram as espécies mais importantes e representaram 80 por cento dos indivíduos (54 por cento e 26 por cento, respectivamente) e as outras espécies (árvores) 20 por cento. Em média a BS dos SAF foi de 298,44 t/ha. O açaí apresentou BS de 4,47 t/ha (43 por cento nas folhas e 57 por cento nos estipes), o cacau 1,45 t/ha (18 por cento nas folhas e 82 por cento na madeira) e as árvores 292,52 t/ha (1 por cento nas folhas e 99 por cento na madeira). O EC contido na BS total média foi de 134,30 t/ha; as árvores estocaram 131,63 t/ha (98 por cento), o açaí 2,01 t/ha (1,5 por cento) e o cacau 0,65 t/ha (0,5 por cento). O EC médio dos SAF estudados (idade média de 12 anos) representou, em média, cerca de 96 por cento do carbono que é estocado numa floresta primária de terra firme; cerca de 62 por cento a mais do estocado em florestas secundárias enriquecidas (idade média de 26 meses) e 23 por cento a mais do estocado em florestas de várzeas na Amazônia brasileira.
Descritores: Carbono
Biomassa
Ecossistema Amazônico
Áreas Alagadas
Responsável: BR6.1 - BCS - Biblioteca de Ciências da Saúde



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