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Registros recuperados: 5
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Analyse statistique des données du RSL - Etude des trajectoires écologiques des lagunes entre 2001 et 2012 ArchiMer
Derolez, Valerie; Ouisse, Vincent; Fiandrino, Annie; Munaron, Dominique; Bissery, Claire; Kloareg, Maela.
Les questions abordées dans le présent rapport concernent la recherche et l’interprétation d’un repère de représentation des données du RSL (colonne d’eau et phytoplancton) pour l’ensemble des stations des lagunes de Provence-Alpes Côte d’Azur (PACA), Languedoc-Roussillon (LR) et Corse : 1) Est-il possible de trouver un repère pertinent de représentation des trajectoires d’évolution pour toutes les stations, en effectuant des regroupement par typologie de stations ? Comment interpréter les deux premiers axes de l’analyse en composantes principales (ACP) ? 2) Le premier axe des repères d’ACP constitue-t-il un « Gradient d’eutrophisation » ? 3) Est-il possible de mettre en évidence un effet météorologique sur les évolutions des teneurs en azote et phosphore...
Tipo: Text Palavras-chave: Lagunes; Eutrophisation; Restauration; Trajectoires; Nutriments; Phytoplancton..
Ano: 2013 URL: http://archimer.ifremer.fr/doc/00173/28423/26754.pdf
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Rapport de mission International Conference on Shellfish Restoration, 2011, Stirling (Ecosse) ArchiMer
Mazurie, Joseph.
The 14th International Conference on Shellfish Restoration (ICSR) comes this year to the United Kingdom for the first time in its 26 years history. The conference will be held at the University of Stirling in the heart of Scotland and its title and theme will be “Shellfish: our undervalued resource”. The theme of the conference, “Shellfish: our undervalued resource”, reflects the UK perception of shellfish as something that is good to eat, often in upmarket restaurants. Shellfish fisheries and aquaculture are indeed a very important part of the UK economy; shellfish reefs however form an ecosystem that provides myriad benefits (“ecosystem services”) many of which have been lost through acute fishing pressures, disease, pollution and other factors. On a...
Tipo: Text Palavras-chave: Coquillages; Restauration; Récif; Chesapeake; Crassostrea; Service écosystémique; Shellfish; Restoration; Reefs; Chesapeake; Wadden Sea; Marine; Crassostrea.
Ano: 2011 URL: http://archimer.ifremer.fr/doc/00045/15590/12992.pdf
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Recovery of the macrobenthic community in the Valli di Comacchio, northern Adriatic Sea, Italy ArchiMer
Munari, C; Modugno, S; Ghion, F; Castaldelli, G; Fano, Ea; Rossi, R; Mistri, M.
The macrobenthic community structure of the Valli di Comacchio (northern Italy) was described in order to assess the ecological conditions of the main basins through 2001. In addition, the biotic data set gathered in 1997-1998 was compared to achieve an estimation of the eventual recovery of the lagoonal benthic assemblages. Four permanent sites (PI, M4, M5 and M6), located along a gradient of sediment texture and confinement, and representing four different areas of the lagoon, were sampled quarterly in 2001 for macrofauna and sedimentary variables (organic content, phytobenthic chlorophyll-a, depth of the redox potential discontinuity layer), and fortnightly for water variables (temperature, salinity, dissolved oxygen and planktonic chlorophyll-a). Water...
Tipo: Text Palavras-chave: Macrobenthos; Valli; Mer Adriatique; Restauration; Macrobenthos; Valli; Adriatic Sea; Recovery.
Ano: 2003 URL: http://archimer.ifremer.fr/doc/00322/43286/43021.pdf
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Rôle des macrophytes dans la restauration des milieux lagunaires : successions écologiques ArchiMer
Le Fur, Ines.
The growing awareness of the negative impacts of the degradation of the water quality in coastal lagoons because of eutrophication has resulted in public action aiming at the reduction of the nutrient loadings into these lagoons. Hence, some of these coastal lagoons are currently undergoing ecological restoration and have shown a clear improvement of their water quality linked to decreasing phytoplankton biomass in the last 10 years. However, the response of the benthic macrophytes appears more complex, particularly by showing non-linear behaviour. By using complementary approaches including statistical analyses of long-term observations (1998-2015) and in situ measurements, this thesis aims to describe the dynamics of the macrophytes in space and time and...
Tipo: Text Palavras-chave: Macrophytes; Eutrophisation; Lagunes méditerranéennes; Oligotrophisation; Restauration; Macrophytes; Eutrophication; Mediterrannean lagoons; Oligotrophication; Restoration.
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00498/60959/64362.pdf
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Trajectoires d’évolution des communautés phytoplanctoniques au cours du processus de restauration écologique des milieux lagunaires méditerranéens ArchiMer
Leruste, Amandine.
Located at the interface between marine and continental systems, coastal lagoons are among the most diverse and productive ecosystems. These semi-enclosed ecosystems are very vulnerable to nutrient enrichment. In the Languedoc-Roussillon region, anthropogenic pressures have profoundly damaged the coastal lagoons, especially those belonging to the Palavasian complex close to Montpellier. The latter lagoons have been affected by high nutrient loadings from the sewage treatment plant of the Montpellier agglomeration. This resulted in a trophic gradient among the eight lagoons in the complex, from mesotrophy to hypertrophy, with altered primary producer communities by favoring the predominance of the phytoplankton compartment.The phytoplankton responds very...
Tipo: Text Palavras-chave: Phytoplancton; Biodiversité; Eutrophisation; Restauration; Résilience; Lagunes méditerranéennes; Phytoplankton; Biodiversity; Eutrophication; Restoration; Resilience; Mediterranean lagoons.
Ano: 2016 URL: https://archimer.ifremer.fr/doc/00498/60930/64324.pdf
Registros recuperados: 5
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