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Registros recuperados: 6
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Can pesticides, copper and seasonal water temperature explain the seagrass Zostera noltei decline in the Arcachon bay? ArchiMer
Gamain, Perrine; Feurtet-mazel, Agnes; Maury-brachet, Regine; Auby, Isabelle; Pierron, Fabien; Belles, Angel; Budzinski, Helene; Daffe, Guillemine; Gonzalez, Patrice.
Dwarf eelgrasses (Zostera noltei) populations have decreased since 2005 in Arcachon Bay (southwest France). Various stressors have been pointed out, however the role of xenobiotics like pesticides or copper (Cu) and of parameters like water temperature warming have not yet been explored. To determine their impact, Z. noltei individuals were collected in a pollution-free site and transferred to the laboratory in seawater microcosms. This dwarf eelgrass was exposed to a pesticide cocktail and copper, alone or simultaneously, at temperatures (10 °C, 20 °C, 28 °C) representative of different seasons. After a two-week contamination, leaf growth, leaf bioaccumulation of Cu, and differential expression of target genes were studied. Eelgrasses bioaccumulated Cu...
Tipo: Text Palavras-chave: Zostera noltei; Arcachon Bay; Pesticides; Copper; Cellular impacts.
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00407/51831/58536.pdf
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Effects of short flexible seagrass Zostera noltei on flow, erosion and deposition processes determined using flume experiments ArchiMer
Ganthy, Florian; Soissons, Laura; Sauriau, Pierre-guy; Verney, Romaric; Sottolichio, Aldo.
Innovative flume experiments were conducted in a recirculating straight flume. Zostera noltei meadows were sampled in their natural bed sediments in the field at contrasting stages of their seasonal growth. The aims of this study were: (i) to quantify the combined effects of leaf flexibility and development characteristics of Zostera noltei canopies on their interaction with hydrodynamics; and (ii) to quantify the role of Zostera noltei meadows in suspended sediment trapping and bed sediment resuspension related with changes in hydrodynamic forcing caused by the seasonal development of seagrasses. Velocity within the canopy was significantly damped. The attenuation in velocity ranged from 34 to 87% compared with bare sediments and was associated with a...
Tipo: Text Palavras-chave: Arcachon Bay; Flexible vegetation; Flow modification; Flume experiments; France; Sediment resuspension; Sediment trapping; Zostera noltei.
Ano: 2015 URL: https://archimer.ifremer.fr/doc/00244/35507/34016.pdf
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Latitudinal Patterns in European Seagrass Carbon Reserves: Influence of Seasonal Fluctuations versus Short-Term Stress and Disturbance Events ArchiMer
Soissons, Laura M.; Haanstra, Eeke P.; Van Katwijk, Marieke M.; Asmus, Ragnhild; Auby, Isabelle; Barille, Laurent; Brun, Fernando G.; Cardoso, Patricia G.; Desroy, Nicolas; Fournier, Jerome; Ganthy, Florian; Garmendia, Joxe-mikel; Godet, Laurent; Grilo, Tiago F.; Kadel, Petra; Ondiviela, Barbara; Peralta, Gloria; Puente, Araceli; Recio, Maria; Rigouin, Loic; Valle, Mireia; Herman, Peter M. J.; Bouma, Tjeerd J..
Seagrass meadows form highly productive and valuable ecosystems in the marine environment. Throughout the year, seagrass meadows are exposed to abiotic and biotic variations linked to (i) seasonal fluctuations, (ii) short-term stress events such as, e.g., local nutrient enrichment, and (iii) small-scale disturbances such as, e.g., biomass removal by grazing. We hypothesized that short-term stress events and small-scale disturbances may affect seagrass chance for survival in temperate latitudes. To test this hypothesis we focused on seagrass carbon reserves in the form of starch stored seasonally in rhizomes, as these have been defined as a good indicator for winter survival. Twelve Zostera noltei meadows were monitored along a latitudinal gradient in...
Tipo: Text Palavras-chave: Carbon reserves; European Atlantic coast; Latitude; Resilience; Zostera noltei; Climate setting; Stress events.
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00423/53420/54308.pdf
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Protocoles de suivi stationnel des herbiers à zostères pour la Directive Cadre sur l’Eau (DCE). Zostera marina - Zostera noltei. Version 3 ArchiMer
Auby, Isabelle; Oger-jeanneret, Helene; Gouillieux, Benoît; Grall, Jacques; Janson, Anne-laure; Maguer, Marion; Rigouin, Loic; Rollet, Claire; Sauriau, Pierre - Guy; Trut, Gilles.
This report is an update of the previous WFD monitoring protocols for seagrass beds on the French coasts (Channel, Atlantic). The different steps of field sampling and laboratory measurements are described.
Tipo: Text Palavras-chave: Directive Cadre sur l’eau; Herbiers; Zostera noltei; Zostera marina; Protocoles de suivi; Water Framework Directive; Seagrass beds; Zostera noltei; Zostera marina; Monitoring protocols..
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00471/58250/60782.pdf
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Suivi stationnel des herbiers à Zostera noltei dans la masse d'eau côtière FRGC03-Rance Fresnaye (Saint-Jacut-de-la-mer) -Bassin Loire-Bretagne - Bilan 2012-2016 ArchiMer
Lejolivet, Aurore; Foveau, Aurelie; Le Mao, Patrick; Rollet, Claire.
This work is in the framework of the Zostera noltei beds site monitoring along the French coasts. This report deals with data obtained from the Saint-Jacut-de-la-mer eelgrass bed from 2012 to 2016, following protocols for the WFD (Auby et al., 2014).
Tipo: Text Palavras-chave: Directive Cadre sur l’Eau; État écologique; Herbier; Masse d’eau; Rance-Fresnaye; Saint-Jacut-de-la-mer; Suivi stationnel; Zostera noltei.; Water Framework directive; Ecological state; Eelgrass beds; Water body; Rance-Fresnaye; Saint-Jacut-de-la-mer; Site monitoring; Zostera noltei.
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00586/69810/67705.pdf
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Suivi stationnel des herbiers à Zostera noltei dans la masse d'eau de transition FRGT03-Le Trieux (Le Trieux) - Bassin Loire-Bretagne - Bilan 2012-2016 ArchiMer
Lejolivet, Aurore; Foveau, Aurelie; Le Mao, Patrick; Rollet, Claire.
This work is in the framework of the Zostera noltei beds site monitoring along the French coasts. This report deals with data obtained from the Trieux estuary eelgrass bed from 2012 to 2016, following protocols for the WFD (Auby et al., 2014).
Tipo: Text Palavras-chave: Directive Cadre sur l’Eau; Estuaire du Trieux; État écologique; Herbiers; Masse d’eau; Suivi stationnel; Zostera noltei.; Water Framework directive; Trieux estuary; Ecological state; Eelgrass beds; Water body; Site monitoring; Zostera noltei.
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00586/69811/67706.pdf
Registros recuperados: 6
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