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Registros recuperados: 196
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Ecosystem spatial structure revealed by integrated survey data ArchiMer
Petitgas, Pierre; Huret, Martin; Dupuy, Christine; Spitz, Jerome; Authier, Matthieu; Romagnan, Jean-baptiste; Doray, Mathieu.
Integrated marine survey series such as PELGAS provide comprehensive geo-referenced data over large sea areas in major ecosystem components with defined biological resolution and spatio-temporal sampling scale. These data enable to develop product at different levels of biological organization and spatial scale that are useful for ecosystem integrated assessments. Using the PELGAS integrated data series, we applied a generic procedure made of several steps to identify and map ecologically coherent ecosystem spatial units in the Bay of Biscay. First, the data were interpolated on a common spatial grid and organized as a time series of matrices containing at each time the variables as columns and the grid cell values as rows. The multi-table analysis method...
Tipo: Text Palavras-chave: Integrated surveys; Ecosystems; Spatial structure; Multi-factor analysis; Bay of Biscay; Pelagic.
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00403/51402/51977.pdf
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Ecosystem structure and dynamics of the marine system of Sierra Leone for three time periods: 1964, 1978 and 1990 OceanDocs
Heymans, S.J.; Vakily, J.M..
We present the key feature of a quantitative food web model for the shelf and slope waters off Sierra Leone, constructed using the Ecopath with Ecosim software. Three periods are represented: 1964, based on data from the Guinean Trawling Survey, complemented with field data on lower trophic levels gathered in the late 1950/early 1960s and published by A.R. Longhurst; 1978, for which fish abundance data from an ex-USSR survey exist, along with related, scattered fisheries information; and 1990, for which a fair amount of fisheries data exist, along with the results of a Spanish trawl survey. Demersal fish biomass appears to have declined linearly from 1964 to 1990, due to the massive increase of the catches of distant water fleets operating in Sierra Leone,...
Tipo: Conference Material Palavras-chave: Ecosystems; Marine structures.
Ano: 2002 URL: http://hdl.handle.net/1834/710
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Ecosystemes benthiques profonds et chimiosynthese bacterienne: Sources hydrothermales et suintements ArchiMer
Laubier, Lucien.
Hydrothermal communities of various species compositions have been described from the eastern and western Pacific and Atlantic. Brine and cold seeps and hydrocarbon seepages have been found off Florida, off the Oregon and Japanese subduction systems, on the Laurentian Fan, near Barbados, and off Louisiana. Biomasses range from 10 to 70 kg/m super(2), fresh weight. Basic microdistribution of species groups in aureoles centered around hydrothermal vents reveals different levels of adaptation to harsh physico-chemical conditions. Two groups of primary producers can be recognized: a highly efficient cool water group with large vestimentiferan tube worms and bivalves, and alvinellid polychaetes adapted to hot waters. Both groups are exploited by specific...
Tipo: Text Palavras-chave: Bivalvia; Polychaeta; Bacteria; Symbionts; Biosynthesis; Chemosynthesis; Food webs; Biomass; Hydrocarbons; Ecosystems; Hydrothermal springs; Seepages; Brines; Benthic environment; Benthos.
Ano: 1990 URL: http://archimer.ifremer.fr/doc/1990/acte-1171.pdf
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Ecosystems and Immune Systems: Useful Analogy or Stretching a Metaphor? Ecology and Society
Walker, Brian; CSIRO Sustainable Ecosystems; Brian.Walker@csiro.au.
Tipo: Peer-Reviewed Reports Palavras-chave: Biological invasion; Ecosystems; Immune systems; Management; Metaphor; Sustainability.
Ano: 2001
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Endangered species protection. Repositório Alice
BENTES, M. P. de M.; FERREIRA, J. N.; MAUES, M. M.; MOURAO, G. de M.; CAMPOS, Z. M. da S.; CRUZ, E. D.; SOUZA, F. I. B. de; MORAES, L. F. D. de; UZEDA, M. C..
This chapter deals with the contributions of the Brazilian Agricultural Research Corporation (Embrapa) to achieve target 15.5 of the Sustainable Development Goal 15 (SDG 15) (United Nations, 2018): "Take urgent and significant action to reduce the degradation of natural habitats, halt the loss of biodiversity and, by 2020, protect and prevent the extinction of threatened species. This chapter presents a brief compilation of how Embrapa performes to comprehend and decrease the loss of habitats and biodiversity through its Research Centers located in all Brazilian regions".
Tipo: Parte de livro Palavras-chave: Conservação; Ecossistema; Biodiversidade; Ecosystems; Natural resources conservation; Biodiversity.
Ano: 2019 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1113810
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Environmental and social values of river water: examples from the Menik Ganga, Sri Lanka. AgEcon
Dissanayake, Priyanka; Smakhtin, Vladimir U..
Many decisions on water allocation in river basins are made on economic grounds. Environmental and social benefits of water should also be considered in river basin management, and attempts should be made to value them similarly. This is not a straightforward task and very few studies have directly addressed this issue to date. In this paper, the Menik Ganga (River) in southern Sri Lanka is used as a case study to attempt and evaluate the costs and benefits of environmental water allocations, referred to as ‘environmental flows’ (EF). In this study, a broad definition of EF is used: the components of EF evaluated include the requirements of the religious festival, the requirements of the Yala National Park, the requirements of the Pilinnawa Coastal Wetland...
Tipo: Working or Discussion Paper Palavras-chave: Rivers; Ecosystems; Wetlands; Wildlife; Fisheries; Water allocation; Water requirements; Case studies; Economic evaluation; Environmental Economics and Policy; Research and Development/Tech Change/Emerging Technologies; Resource /Energy Economics and Policy.
Ano: 2007 URL: http://purl.umn.edu/91876
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Environmental water needs and impacts of irrigated agriculture in river basins: A framework for a new research program AgEcon
Smakhtin, Vladimir U..
Tipo: Working or Discussion Paper Palavras-chave: Water resource management; Water conservation; Irrigated farming; River basins; Environmental effects; Ecosystems; Water requirements; Water allocation; Catchment areas; Lagoons; Wetlands; Environmental Economics and Policy; Farm Management; Resource /Energy Economics and Policy.
Ano: 2002 URL: http://purl.umn.edu/92695
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Epigean ant communities in Atlantic Forest remnants of São Paulo: a comparative study using the guild concept Rev. Bras. entomol.
Macedo,Luciano Pacelli Medeiros; Berti Filho,Evoneo; Delabie,Jacques Hubert Charles.
Epigean ant communities in Atlantic Forest remnants of São Paulo: a comparative study using the guild concept. The guilds constitute a valuable ecological tool, because they allow conducting comparisons among environments under different conditions. The ants can be used as ecological indicators, mainly for the monitoring of degraded forest areas. The aim of this research was to study guild organization among the epigeous Formicidae living in Atlantic forest remnants of the State of São Paulo, Brazil. Ant collections were performed in three distinct Atlantic forest biome areas: arboreal littoral vegetation ("restinga") (Cananéia), semideciduous seasonal forest (Piracicaba) and dense ombrophylousforest (Pariquera-Açu). After identification, the ants were...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Ecological bioindicators; Ecosystems; Environmental monitoring; Formicidae; Hymenoptera.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262011000100012
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Estudos de agroecossistemas: técnicas e metodologias disponíveis para uma abordagem agrometeorológica. Repositório Alice
SÁ, T. D. de A..
Tipo: Parte de livro Palavras-chave: Agrossistema; Sustainability; Methods; Ecossistema; Meteorologia; Método; Tecnologia; Ecosystems; Farming systems; Meteorology; Technology.
Ano: 1999 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/395104
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Etats des lieux nationaux - Projet CEPIA: dynamiques halieutiques et systèmes de gestion des pêches OceanDocs
Projet CEPIA, Construire Ensemble une gestion des Pêches Intégrant les Amp, Dakar (Sénégal); Centre de Recherches Océanographiques de Dakar Thiaroye, Dakar (Sénégal); Djiga Thiaw; Moustapha Déme; Hamed Diaw Diadhiou; Adama Mbaye.
Commission Sous Régionale des Pêches
Tipo: Report Palavras-chave: Fisheries management; Fishery legislation; Ecosystems; Demersal fisheries; Fishery policy; Protected areas.
Ano: 2011 URL: http://hdl.handle.net/1834/4585
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Etude de l’effet des facteurs du milieu sur la distribution des bactéries entériques dans la lagune de Bizerte (nord -Tunisie) OceanDocs
Boukef, I.; El Bour, M.; Bejaoui, B.; Harzallah, A.; Belhassen, M.; Mrouana, R.; Mejri, S.; Boudabous, A..
La présente étude est effectuée dans le but d’évaluer l’effet des facteurs du milieu sur la distribution des populations bactériennes entériques dans un milieu lagunaire : la lagune de Bizerte. Un échantillonnage saisonnier, (novembre 2004, février 2005, mai 2005 et août 2005), portant sur 41 stations couvrant toute la lagune ont été réalisés. Les analyses bactériologiques effectuées ont concerné l’eau et le sédiment. Les paramètres physico-chimiques de l’eau ont été mesurés in-situ simultanément aux différents échantillonnages. Aussi, les paramètres climatiques ont été fournis par une station météorologique située à proximité de la lagune. Les résultats obtenus ont révélé que les charges en bactéries sont plus importantes dans les sédiments que dans...
Tipo: Journal Contribution Palavras-chave: Abiotic factors; Ecosystems; Geographical distribution; Pollution monitoring; Public health; Water quality; Geographical distribution; Ecosystems; Public health; Water quality; Http://aims.fao.org/aos/agrovoc/c_5083; Http://aims.fao.org/aos/agrovoc/c_2482; Http://aims.fao.org/aos/agrovoc/c_6349; Http://aims.fao.org/aos/agrovoc/c_16061.
Ano: 2008 URL: http://hdl.handle.net/1834/3696
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Etude de l'effet des facteurs du milieu sur la distribution des bactéries entériques dans la lagune de Bizerte (Nord-Tunisie) OceanDocs
Bejaoui, B.; Elbour, M.; Belhassen, M.; Mrouna, R.; Boukef, I.; Mejri, S.; Harzallah, A.; Boudabous, A..
La présente étude est effectuée dans le but d’évaluer l’effet des facteurs du milieu sur la distribution des populations bactériennes entériques dans un milieu lagunaire : la lagune de Bizerte. Un échantillonnage saisonnier, (novembre 2004, février 2005, mai 2005 et août 2005), portant sur 41 stations couvrant toute la lagune ont été réalisés. Les analyses bactériologiques effectuées ont concerné l’eau et le sédiment. Les paramètres physico-chimiques de l’eau ont été mesurés in-situ simultanément aux différents échantillonnages. Aussi, les paramètres climatiques ont été fournis par une station météorologique située à proximité de la lagune. Les résultats obtenus ont révélé que les charges en bactéries sont plus importantes dans les sédiments que dans...
Tipo: Journal Contribution Palavras-chave: Abiotic factors; Ecosystems; Geographical distribution; Pollution monitoring; Public health; Water quality.
Ano: 2008 URL: http://hdl.handle.net/1834/4262
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Etude des pecheries, reflexions sur l'environment et la gestion multispecifique. ArchiMer
Le Guen, Jean-claude; Chevalier, Robert.
All considerations about halieutic stocks inevitably had to attain the recognition of relations which are established between the resource and its natural environment. These phenomenons are exposed in the first part. About consequences of human interventions, both of these aspects must be taken into account: the introduction of new species and fishing. Second part deals with the use of models in stock management.
Tipo: Text Palavras-chave: Mollusca; Crustacea; Pisces; Fishery economics; Fishery management; Fishery biology; Stock assessment; Ecosystems; Environmental effects.
Ano: 1982 URL: http://archimer.ifremer.fr/doc/1982/publication-1859.pdf
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Etude sur le savoir écologique des pêcheurs artisans des petits pélagiques en Afrique du Nord-Ouest OceanDocs
Sall, A..
Agriculture, Nature and Food Quality, Den Haag (Netherlands); Ministerie Van Buitenlandse Zaken, Brussel (Belgium); Wageningen International, Wageningen (Netherlands)
Tipo: Report Palavras-chave: Fisheries; Artisanal fishing; Fishermen; Fishing effort; Canoe fisheries; Coastal zone; Fishery engineering; Protected resources; Pelagic fisheries; Cycles; Sexual reproduction; Multispecies fisheries; Stocks; Ocean currents; Winds; Biomass; Upwelling; Ecosystems; Maritime legislation; Size; Biomass; Ecosystems; Fisheries; Fishermen; Stocks; Ocean currents; Winds; Size; Fishing effort; Pelagic fisheries; Sexual reproduction; Multispecies fisheries; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_2482; Http://aims.fao.org/aos/agrovoc/c_2934; Http://aims.fao.org/aos/agrovoc/c_2936; Http://aims.fao.org/aos/agrovoc/c_28772; Http://aims.fao.org/aos/agrovoc/c_12883; Http://aims.fao.org/aos/agrovoc/c_8401; Http://aims.fao.org/aos/agrovoc/c_7093; Http://aims.fao.org/aos/agrovoc/c_24027; Http://aims.fao.org/aos/agrovoc/c_5659; Http://aims.fao.org/aos/agrovoc/c_26876; Http://aims.fao.org/aos/agrovoc/c_4987.
Ano: 2009 URL: http://hdl.handle.net/1834/3671
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Etudes préliminaires de la deuxième phase du projet de conservation et de gestion participative des écosystèmes de mangrove au Cameroun OceanDocs
Le terme mangrove se réfère habituellement à un complexe de zones humides influencé par les marées et constitué de forêts marécageuses et autres habitats associés dans la zone intertidale sous les latitudes tropicales et subtropicales. Les écosystèmes forestiers de mangrove subissent des dégradations anthropiques de toutes sortes et de diverses amplitudes. La pression démographique provoque leur destruction et son influence s’accentue dans des zones non protégées, surtout au voisinage des agglomérations où les problèmes fonciers et la pauvreté poussent les populations à occuper des espaces libres à faibles coûts. Dans sa volonté d’assurer une gestion durable et participative des mangroves au Cameroun, le Gouvernement à travers le Ministère de...
Tipo: Report Palavras-chave: Mangrovess; Ecosystems; Conservation; Participative management; Regeneration.
Ano: 2010 URL: http://hdl.handle.net/1834/5172
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Evaluation of the carrying capacity of molluscan shellfish ecosystems ArchiMer
Heral, Maurice.
Growth of molluscs raised in coastal zones, where the water exchange rate is low, appears to be limited, once a certain biomass level is attained, by the availability of food, making it necessary to determine as accurately as possible the trophic capacity of an ecosystem. This paper analyses the various sources of food for molluscs. It would appear that dissolved organic substances play a major role, providing up to half the energy necessary for their metabolism. Particulate material is filtered by molluscs in proportion to their size, with optimum filtration rates varying with species. The negative effect on meat production of high mineraI seston rates is demonstrated, and an analysis provided of the respective role of each component of organic matter....
Tipo: Text Palavras-chave: Evaluation; Carrying capacity; Molluscs; Ecosystems; Cochyliculture; Ecosytemes; Molluscs; Evaluation; Capacité biotique.
Ano: 1985 URL: http://archimer.ifremer.fr/doc/1985/acte-2945.pdf
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Evaluation of wheat genotypes for field resistance to wheat blast caused by Magnaporthe oryzae pathotype Triticum (MoT) and correlation between yield loss and disease incidence in the Brazilian Cerrado. Repositório Alice
DIANESE, A. de C.; ZACARONI, A. B.; SOUZA, B. C. P. de; PAGANI, A. P. da S.; PINHEIRO, N. O.; GOMES, E. M. de C.; TORRES, G. A. M.; CONSOLI, L.; CAFÉ-FILHO, A. CORRÊA.
Abstract: Wheat blast caused by Magnaporthe oryzae pathotype Triticum (MoT) has become an important fungal disease on wheat and is now present in most of the important wheat-producing tropical regions of the world. This study evaluated head blast incidence on the spikes of 281 hexaploid wheat genotypes and two Triticum durum cultivars across three years (2011?2013) in the Cerrado Biome in the Brazilian Midwest, a hotspot area and where the highest disease levels have been recorded. Forty eight host lines exhibiting moderate to high resistance to the disease included synthetic hexaploid wheat genotypes (SHW) and derivatives (17), breeding lines (16), landraces (2), and cultivars (13). Thirty early genotypes were identified to have head blast incidence...
Tipo: Artigo de periódico Palavras-chave: Cultivares; Blast reaction; Trigo; Brusone; Cerrado; Ecossistema; Fungo; Pyricularia Oryzae; Magnaporthe oryzae; Wheat; Cultivars; Pathotypes; Landraces; Hexaploidy; Head; Fungi; Ecosystems; Disease incidence; Triticum turgidum subsp. durum; Blast disease.
Ano: 2021 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1140557
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eventualité d’un transfert du phytoplancton toxique des milieux portuaires du golfe de gabè vers les zones de production de coquillage OceanDocs
Hamza, A.; Dammak-Zouari, H.; Bouain, A..
Il est connu que les ports soumis à un trafic maritime intense réceptionnent éventuellement les eaux de ballast des navires en provenance de diverses contrées océaniques. De part le monde, le transfert et l’invasion de plusieurs espèces nuisibles via le déversement des eaux de ballast et le fouling des coques des navires ont été amplement mis en cause ces derniers temps. Ces introductions peuvent causer de nombreux dégâts aux secteurs avoisinants et notamment dans les zones de production des coquillages surtout si les espèces introduites sont constituées de phytoplancton toxique. Au terme de 4 années de suivi de la qualité phytoplanctonique des milieux portuaires du golfe de Gabès, nous avons pu inventorier certaines espèces toxiques pour la plupart...
Tipo: Journal Contribution Palavras-chave: Ballast; Ecology; Ecosystems; Eutrophication; Phytoplankton; Pollution monitoring; Toxicity.
Ano: 2006 URL: http://hdl.handle.net/1834/4271
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Evolution of deforestation in the Brazilian Pantanal and surroundings in the timeframe 1976 - 2008. Repositório Alice
SILVA, J. dos S. V. da; ABDON, M. de M.; SILVA, S. M. A. da; MORAES, J. A. de.
Maps elaborated from five different periods were recovered and inserted within a single GIS. Considering these maps, the evolution of deforestation in the Pantanal and its surroundings in Brazil was analyzed for the last 32 years and scenarios were described for the timeframe 2010-2050. The results for the different BAP (Floodplain and Plateau), BAP (Mato Grosso and Mato Grosso do Sul States), BAP (Biomes: Pantanal, Cerrado and Amazon). Until 2008, the deforestation on the Pantanal floodplain affected 12,14% of its area, while on the Plateau 58,90% were concerned. The actual deforestation percentages indicate that, if no effective control actions are taken, the natural vegetation from this region could be eliminated till 2050. As an instrument for the...
Tipo: Artigo de periódico Palavras-chave: Geotecnologia; Biomas; Bacia do alto Paraguai; Sistemas de informação geográfica.; Desmatamento.; Deforestation; Ecosystems; Thematic maps; Geographic information systems.
Ano: 2011 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/895455
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Ferramenta para integração de dados de recursos naturais dos biomas brasileiros. Repositório Alice
CARVALHO, G. S.; SPERANZA, E. A..
O projeto NATDATA, sigla para Plataforma de Integração de Dados dos Recursos Naturais (MACÁRIO et al., 2011) tem como um de seus objetivos criar uma interface para o usuário final das informações sobre os recursos naturais dos biomas brasileiros, ajudando-o com um ambiente intuitivo que permita a consulta rápida e integrada a esses dados. Essa consulta permitirá que haja uma melhor orientação dos investimentos, como uma visão antecipada dos possíveis problemas que alguma região possa sofrer. Devido ao modo heterogêneo com que diversas instituições brasileiras colheram essas informações, há uma grande dificuldade em reaproveitá-las em conjunto. Com isso, o projeto NATDATA foca centralizar essa informação, tornando-a utilizável.
Tipo: Folhetos Palavras-chave: Biomas brasileiros; Aplicação web; Ecosystems.
Ano: 2012 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/954546
Registros recuperados: 196
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