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| Registros recuperados: 113 | |
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| Mauvais, Jean-louis; Goarnisson, Roger. |
| This document was drawn up by a working group and based upon forecasting considerations concerning the Atlantic seaboard. Within can be found a summary of different issues affecting the coastline : inputs, estuaries, green tides, spreading species, wetlands, state of biological resources, sand and gravel as well as hydrocarbon extraction, development consequences, coastline evolution, littoral landscapes, large-size debris. This report summarizes coastline monitoring as well : the marine national monitoring network, microbiological surveillance of beaches and zones of shellfish production, plytoplankton monitoring, shellfish growth. Lastly, this document discusses proposed actions for the improvement of water quality by the Water Agencies of... |
| Tipo: Text |
Palavras-chave: Bacterial pollutions; Chemical pollutions; Marine aggregates; Biological marine resources; Spreading species; Green tides; Estuaries; Monitoring; Development; Coastline environment; Pollutions bactérienne; Pollutions chimique; Granulats marins; Ressources vivantes marines; Espèces proliférantes; Marées vertes; Estuaires; Surveillance; Aménagement; Environnement littoral. |
| Ano: 1999 |
URL: http://archimer.ifremer.fr/doc/1999/rapport-1097.pdf |
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| López-abbate, M.c.; Molinero, Juan-carlos; Barría De Cao, M.s.; Silva, R.; Negri, R.; Guinder, V.a.; Hozbor, M.c.; Hoffmeyer, M.s.. |
| Eutrophication is the most widespread effect of urban development in coastal areas. To elucidate how nutrient loading affects the carbon pathways at the base of food chains, we quantified the carbon transfer among microbial components, from prokaryotes to microzooplankton. For this purpose, we performed two size-fractionation feeding experiments during late summer under moderate (N: 28.5 μM, P: 0.92 μM, Si: 45.8 μM) and severe (N: 173.9 μM, P: 3.5 μM, Si: 67.2 μM) cultural eutrophication in the Bahía Blanca Estuary (Argentina). In both experiments, prokaryotes were largely dominated by heterotrophic forms, small diatoms dominated among autotrophs, and heterotrophic nanoflagellates were the most abundant among protistan grazers. Under severe eutrophication,... |
| Tipo: Text |
Palavras-chave: Eutrophication; Microbial food web; Bacteria; Nanoflagellates; Microzooplankton; Estuaries. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00512/62335/66718.pdf |
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| Mancera-P., José E.; Vidal-V., Luis A.. |
| Entre los meses de julio y agosto de 1994 un fenómeno discontinuo de muerte masiva de peces se registró en aguas del complejo lagunar de la Ciénaga Grande de Santa Marta, Colombia. El primer evento se presentó del 15 al 19 de julio, el segundo alrededor del día 20 de agosto y el tercero entre el 26 y 31 del mismo mes. La presencia en altas concentraciones de la cianofita filamentosa Cf. Anabaenopsis sp., registrada en la literatura como altamente tóxica, podría estar relacionada con las causas del primer evento. Un incremento en las concentraciones de fósforo, y un posterior florecimiento de nano y picoplancton, especialmente cianofíceas y algas flageladas, explicaría en parte las condiciones hipóxicas y anóxicas observadas en el tercer evento, las cuales... |
| Tipo: Journal Contribution |
Palavras-chave: Ecology; Phytoplankton; Chemical analysis; Environmental impact; Coastal lagoons; Estuaries; Ecology; Phytoplankton; Environmental impact; Estuaries; Coastal lagoons; Http://aims.fao.org/aos/agrovoc/c_2467; Http://aims.fao.org/aos/agrovoc/c_13344; Http://aims.fao.org/aos/agrovoc/c_24420; Http://aims.fao.org/aos/agrovoc/c_2673; Http://aims.fao.org/aos/agrovoc/c_1697. |
| Ano: 1994 |
URL: http://hdl.handle.net/1834/3787 |
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| Cooper, J.A.G.; Harrison, T.D.; Ramm, A.E.L.. |
| The South African 3 000 km coastline has approximately 370 outlets to the sea ranging from small coastal streams to large permanently open tidal estuaries. The current state of scientific information on the vast majority of these systems, however, is virtually nil. As part of a national program to assess the state of South Africa’s estuarine environment, basic surveys were conducted on these systems during the period 1992 to 1999. This included ichthyofauna (fish), water quality, and geomorphological and aesthetic observations. Some 67% of South Africa’s ‘estuaries’ have been surveyed to date. This baseline data has been analysed and synthesised to render it understandable to the non-specialist but at a sufficiently high level to inform potential end users... |
| Tipo: Working Paper |
Palavras-chave: Water quality; Geomorphology; Ichthyofauna; Estuaries. |
| Ano: 2000 |
URL: http://hdl.handle.net/1834/660 |
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| Spivak,Eduardo D.; Bas,Claudia C.; Luppi,Tomás A.. |
| ABSTRACT Two populations of the Southwestern Atlantic burrowing crab, Neohelice granulata (Dana, 1851), are separated by only 190 km. They inhabit bays that drain into a Patagonian gulf in the southernmost limit of the geographical distribution of the species: San Antonio Bay (SAO) and San José Gulf (RSJ). The population from SAO has been extensively studied, whereas that of RSJ has not. The main goal of this study is to compare the ecological and habitat characteristics of the two populations, based on samples collected on successive days during the middle of the reproductive season of the crab. The substrate of SAO is composed of a high proportion of gravel and scarce organic matter, whereas the substrate of RSJ presents twice as much silt and clay, and... |
| Tipo: Info:eu-repo/semantics/other |
Palavras-chave: Argentine; Estuaries; Crab; Fecundity; Feeding; Growth; Maturity; Sediment. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702016000604001 |
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| Zouari, M.; Hitonori, N.; Lymayem, Y.; M'Rabet, R.; Dhraief, M.N.; Missaoui, H.; Guergej, H.; Kraiem, M.M.. |
| Le potentiel de grossissement de la palourde Ruditapes decussatus (L. 1758), élevée dans des poches de filet de 1 m2 de surface, a été évalué sur l’estran de Zarat (golfe de Gabès) pour la période de juillet 2006 à novembre 2007. Dans une première expérience, trois niveaux de la marée, représentant des chenaux de drainage de l’eau, existants entre la ligne de marée haute et celle de marée basse, ont été comparés sur une durée de 16 mois. Chacun des niveaux a été représenté par un triplicata de sacs de 150 individus. Dans une seconde expérience, trois densités de mise en charge différentes ont été comparées sur une durée de 17 mois. Pour cela, deux sacs de 100 individus chacun et deux autres de 200 individus chacun ont été alignés à l’expérience précédente,... |
| Tipo: Journal Contribution |
Palavras-chave: Clam culture; Comparative studies; Environmental conditions; Estuaries; Experimental culture; Growth; Growth rate; Marine aquaculture; Marine molluscs; Population density; Rearing; Stocking density; Clams. |
| Ano: 2009 |
URL: http://hdl.handle.net/1834/4495 |
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| Van Damme, S.; Meire, P.. |
| The Scheldt estuary is exposed to large loads of carbon and nutrients. This leads to a eutrophication problem characterized by reduced oxygen concentrations and a huge efflux of CO<sub>2</sub>. In the coastal waters a degradation of the foodchain is noted caused by excessive nutrient supply. The capacity of the estuary to polish the water is important but can not cope with the vast scale of the immissions. Restoration and development of tidal wetlands can contribute in several ways to restore the water quality. Increase of water treatment is expected to have positive ecological results. Nevertheless, restoration of the oxygen conditions might counteract some purifying processes. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Degradation; Estuaries; Eutrophication; Food chains; Nutrients (mineral); Water quality. |
| Ano: 2001 |
URL: http://www.vliz.be/imisdocs/publications/280697.pdf |
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| Nogueira-Melo,Georgea S.; Santos,Paulo J. P.; Gibertoni,Tatiana B.. |
| ABSTRACT This study aimed to investigate for the first time the ecological interactions between species of Agaricomycetes and their host plants in Brazilian mangroves. Thirty-two field trips were undertaken to four mangroves in the state of Pernambuco, Brazil, from April 2009 to March 2010. One 250 x 40 m stand was delimited in each mangrove and six categories of substrates were artificially established: living Avicennia schaueriana (LA), dead A. schaueriana (DA), living Rhizophora mangle (LR), dead R. mangle (DR), living Laguncularia racemosa (LL) and dead L. racemosa (DL). Thirty-three species of Agaricomycetes were collected, 13 of which had more than five reports and so were used in statistical analyses. Twelve species showed significant values for... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fungi; Estuaries; Host-fungi interaction; Host-relationships; Plant-fungi interaction. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062017000400566 |
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| Registros recuperados: 113 | |
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