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| Registros recuperados: 196 | |
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| 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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| 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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| 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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| 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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| 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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| 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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| 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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| 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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| 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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| 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 |
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| Registros recuperados: 196 | |
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