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| Registros recuperados: 113 | |
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| Salles, Denis; Roumezi, Alexis; Lanceleur, Laurent; Schaefer, Jorg; Petit, Jerome; Blanc, Gerard; Coynel, Alexandra; Chiffoleau, Jean-francois; Auger, Dominique. |
| This article presents the results of multidisciplinary research (geochemistry, sociology) into the increasing concentrations of silver (Ag and nanoAg) in the environment and their potential impact on aquatic environments. We investigate simultaneously the risk of contamination of these environments by silver and the process of the social and political construction of this risk by water managers, health authorities, agencies and committees responsible for expert evaluations, environmental associations, and potential users of silver or nano-silver. Four updated models of risk construction allow us to understand the logic of arguments mobilized at this stage of the emerging risk. This interdisciplinary cooperation opens up possibilities for dealing with some... |
| Tipo: Text |
Palavras-chave: Environment; Estuaries; Geochemistry; Interdisciplinary communication; Nanotechnology; Risk assessment; Risk management; Silver; Sociology; Water pollutants. |
| Ano: 2013 |
URL: http://archimer.ifremer.fr/doc/00156/26736/24939.pdf |
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| Amezcua,Felipe; Rodríguez-Preciado,José Alberto; Calderón-Pérez,Antonio; Rendón-Rodríguez,Sergio; Green,Lucinda; Chazarreta,Carlo Javier. |
| Abstract The influence of salinity and temperature on larval fish assemblages, as well as, temporal and vertical patterns on larval fish assemblages off the inlet of the Presidio River, southeast coast of the Gulf of California were evaluated. Samplings for ichthyoplankton and environmental parameter measurements were carried out at three depths, in five sampling sites, during September and December 1994, and April and June 1995. Anchovies and herrings (Clupeiformes) were the most abundant larval fish accounting for 77% of the total abundance. A significant relationship between salinity and the abundance of larval herrings (Opisthonema medirastre and O. dovii) and between the water temperature and the abundance of the weakfish (Cynoscion reticulatus) was... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Estuaries; Ichthyoplankton; Larval fish distribution; Sinaloa; Vertical distribution. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252020000100212 |
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| López-abbate, M. Celeste; Molinero, Juan-carlos; Perillo, Gerardo M.e.; Barría De Cao, M. Sonia; Pettigrosso, Rosa E.; Guinder, Valeria A.; Uibrig, Roman; Berasategui, Anabela A.; Vitale, Alejandro; Marcovecchio, Jorge E.; Hoffmeyer, Mónica S.. |
| Planktonic ciliates constitute a fundamental component among microzooplankton and play a prominent role in carbon transport at the base of marine food webs. How these organisms respond to shifting environmental regimes is unclear and constitutes a current challenge under global ocean changes. Here we examine a multiannual field survey covering 25 years in the Bahía Blanca Estuary (Argentina), a shallow, flood-plain system dominated by wind and tidal energy. We found that the estuary experienced marked changes in wind dominant regimes and an increase in water turbidity driven from the joint effect of persistent long-fetch winds and the indirect effect of the Southern Annular Mode. Along with these changes, we found that zooplankton components, i.e. ciliates... |
| Tipo: Text |
Palavras-chave: Tintinnids; Oligotrichs; Acartia tonsa; Wind; Turbidity; Estuaries. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00471/58252/60760.pdf |
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| Falk, T.M.; Teugels, G.G.. |
| The West African coastal zone is rich in estuaries and lagoons. Estuaries are abundant in the area from the mouth of Senegal to Guinea (e.g., Sine Saloum, Casamance); lagoons are generally present from Cote d'Ivoire to the Niger Delta in Nigeria (e.g., Ebrie Lagoon, Porto Novo Lagoon, Lagos Lagoon). Because of their important diversity, it is difficult to give their physical and biological definitions. They are all, however, characterized by a typical and rich fish species composition |
| Tipo: Proceedings Paper |
Palavras-chave: Fish species; Coastal zone; Lagoons; Estuaries. |
| Ano: 2000 |
URL: http://hdl.handle.net/1834/737 |
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| Mangroves are forests of salt-tolerant trees and shrubs that grow in the shallow tidal waters of estuaries and coastal areas in tropical regions. They require slow currents, no frost and plenty of fine sediment in which to set their roots. Their muddy waters, rich in nutrients from decaying leaves and wood, are home to sponges, worms, crustaceans, molluscs and algae, and provide shelter for marine mammals, snakes and crocodiles. They act as fish nurseries and help feed life further out to sea. QueenslandÕs mangroves, for instance, do much to sustain the Great Barrier Reef, the worldÕs largest coral reef system. Mangroves are also strongly correlated with the presence of shoals of shrimp further offshore. Mangroves extend over 18 million hectares worldwide,... |
| Tipo: Book Section |
Palavras-chave: Mangroves; Estuaries. |
| Ano: 2001 |
URL: http://hdl.handle.net/1834/419 |
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| Blanchet, Hugues; Gouillieux, Benoit; Alizier, Sandrine; Amouroux, Jean-michel; Bachelet, Guy; Barille, Anne-laure; Dauvin, Jean-claude; De Montaudouin, Xavier; Derolez, Valerie; Desroy, Nicolas; Grall, Jacques; Gremare, Antoine; Hacquebart, Pascal; Jourde, Jerome; Labrune, Celine; Lavesque, Nicolas; Meirland, Alain; Nebout, Thiebaut; Olivier, Frederic; Pelaprat, Corine; Ruellet, Thierry; Sauriau, Pierre-guy; Thorin, Sebastien. |
| Based on a parallel sampling conducted during autumn 2008, a comparative study of the intertidal benthic macrofauna among 10 estuarine systems located along the Channel and Atlantic coasts of France was performed in order to assess the level of fauna similarity among these sites and to identify possible environmental factors involved in the observed pattern at both large (among sites) and smaller (benthic assemblages) scales. More precisely this study focused on unraveling the observed pattern of intertidal benthic fauna composition and diversity observed at among-sites scale by exploring both biotic and abiotic factors acting at the among- and within-site scales. Results showed limited level of similarity at the among-site level in terms of intertidal... |
| Tipo: Text |
Palavras-chave: Estuaries; Macrozoobenthos; Diversity; Structuring Factors; WFD. |
| Ano: 2014 |
URL: http://archimer.ifremer.fr/doc/00179/29016/27444.pdf |
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| Herbert, R. |
| Seasonal data and depth profiles using super(15)N-labelled NO sub(3)u- show that denitrification (77-90% of NO sub(3)u- respired) rather than NO sub(3)u- dissimilation to NH sub(4)u+ was the principal route of nitrate reduction in Kingoodie Bay sediments. Populations of both groups of NO sub(3)u- reducing bacteria were highest in the 0-20 mm horizon in those sediments where highest rates of NO sub(3)u- respiration were recorded (28.56 mu g N.d super(-1) dry wt. sediment super(-1)). Autotrophic nitrification rates shared a marked seasonality with highest rates (0.92 mu g N.d super(-1).g dry wt. sediment super(-1)) occurring during the summer. Maximum populations of autotrophic nitrifying bacteria were also found in the 0-20 mm sediment horizon and these... |
| Tipo: Text |
Palavras-chave: Seasonal variations; Bacteria; Estuaries; Sediment chemistry; Biogeochemistry; Ammonia; Nitrates; Nitrogen cycle. |
| Ano: 1984 |
URL: http://archimer.ifremer.fr/doc/1984/acte-971.pdf |
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| Registros recuperados: 113 | |
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