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Registros recuperados: 11
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High resolution overview of phytoplankton spectral groups and hydrological conditions in the eastern English Channel using unsupervised clustering ArchiMer
Lefebvre, Alain; Poisson-caillault, Emilie.
As we move towards shipboard-underway and automated systems for monitoring water quality and assessing ecological status, there is a need to evaluate how effective the existing monitoring systems are, and how we could improve them. Considering the existing limitations for processing numerous and complex data series generated from automated systems, and because of processes involved in phytoplankton blooms, this paper proposes a data-driven evaluation of an unsupervised classifier to optimize the way we track phytoplankton, including harmful algal blooms (HABs), and to identify the main associated hydrological conditions. We used in situ data from a portable flow-through automatic measuring system coupled with a multi-fixed-wavelength fluorometer...
Tipo: Text Palavras-chave: Clustering; Spectral fluorescence; Phaeocystis globosa; English Channel Ferry Box; MSFD; Marine Strategy Framework Directive.
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00479/59043/61793.pdf
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Impact of the Phaeocystis globosa spring bloom on the intertidal benthic compartment in the eastern English Channel: A synthesis ArchiMer
Spilmont, Nicolas; Denis, Lucie; Artigas, Luis Felipe; Caloin, Frederic; Courcot, Lucie; Creach, Anne; Desroy, Nicolas; Gevaert, Francois; Hacquebart, Pascal; Hubas, Cedric; Janquin, Marie-andree; Lemoine, Yves; Luczak, Christophe; Migne, Aline; Rauch, Mathieu; Davoult, Dominique.
From 1999 to 2005, studies carried out in the frame of regional and national French programs aimed to determine whether the Phaeocystis globosa bloom affected the intertidal benthic communities of the French coast of the eastern English Channel in terms of composition and/or functioning. Study sites were chosen to cover most of the typical shore types encountered on this coast (a rocky shore, an exposed sandy beach and a small estuary). Both the presence of active Phaeocystis cells and their degradation product (foam) did have a significant impact on the studied shores. The primary production and growth rates of the kelp Saccharina latissima decreased during the bloom because of a shortage of fight and nutrient for the macroalgae. On sandy sediments, the...
Tipo: Text Palavras-chave: Macrozoobenthos; Bacteria; Saccharina latissima; Benthic fluxes; Phaeocystis globosa; Intertidal.
Ano: 2009 URL: http://archimer.ifremer.fr/doc/2009/publication-6142.pdf
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Pseudo-nitzschia sp. diversity and seasonality in the southern North Sea, domoic acid levels and associated phytoplankton communities ArchiMer
Delegrange, A.; Lefebvre, Alain; Gohin, Francis; Courcot, L.; Vincent, D..
The diversity, toxicity and seasonality of Pseudo-nitzschia sp. were investigated from February to November 2012 in the southern Bight of the North Sea (SBNS) along the French coast. The identification of Pseudo-nitzschia species in this area was addressed for the first time in this study. Our results revealed a low species richness (3 distinct species) in association with moderate (102 pg mL−1) to high (263 pg mL−1) domoic acid (DA) levels in autumn and spring, respectively. Pseudo-nitzschia succession corresponded to the dominance of P. delicatissima in April–May (86% of total diatoms) as a co-occurring species of the Phaeocystis globosa bloom. Following the Phaeocystis bloom (May–September), P. pungens dominated markedly over P. fraudulenta and P....
Tipo: Text Palavras-chave: Pseudo-nitzschia; Southern North Sea; Domoic acid; Phaeocystis globosa; Harmful algal blooms (HAB).
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00458/56994/59368.pdf
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Résultats de la mise en oeuvre des réseaux REPHY et SRN - Zone côtières de la Manche orientale et de la baie sud de la Mer du Nord - Bilan de l'année 2014 ArchiMer
Lefebvre, Alain; Flesch, Morgane.
The coastal zone of the Nord – Pas de Calais / Picardie showed dysfonctioning patterns of the ecosystem considered to be link to human activities along shores. These results in regular massive development of species, such as the phytoplanktonic seaweed, Phaeocystis sp. which life cycle was partly linked to nutrients availability and consequently to anthropogenic inputs. As part of the evaluation of the influence of continental inputs on the marine environment (nitrates, phosphates,…) and on potential eutrophication processes, of the estimation of the efficiency of the sewage treatments plants in the possible elimination of dumpings and in order to establish a long-term survey to follow up the change in coastal waters quality, the regional nutrients...
Tipo: Text Palavras-chave: Manche Orientale; Baie sud de la Mer du Nord; Hydrologie; Phytoplancton; Phaeocystis globosa; Eastern English Channel; Hydrology; Phytoplankton; Phaeocystis globosa; Southern bight of the North Sea.
Ano: 2015 URL: http://archimer.ifremer.fr/doc/00280/39133/37687.pdf
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Résultats de la mise en oeuvre des réseaux REPHY et SRN – Zones côtières de la Manche orientale et de la baie sud de la Mer du Nord – Bilan de l’année 2015 ArchiMer
Lefebvre, Alain; Perrouchet, Wendy.
The coastal zone of the Nord – Pas de Calais / Picardie showed dysfonctioning patterns of the ecosystem considered to be link to human activities along shores. These results in regular massive development of species, such as the phytoplanktonic seaweed, Phaeocystis sp. which life cycle was partly linked to nutrients availability and consequently to anthropogenic inputs. As part of the evaluation of the influence of continental inputs on the marine environment (nitrates, phosphates,…) and on potential eutrophication processes, of the estimation of the efficiency of the sewage treatments plants in the possible elimination of dumpings and in order to establish a long-term survey to follow up the change in coastal waters quality, the regional nutrients...
Tipo: Text Palavras-chave: Manche Orientale; Baie sud de la Mer du Nord; Hydrologie; Phytoplancton; Phaeocystis globosa; Eastern English Channel – southern bight of the North Sea; Hydrology; Phytoplankton; Phaeocystis globosa.
Ano: 2016 URL: http://archimer.ifremer.fr/doc/00341/45246/44683.pdf
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Résultats de la mise en oeuvre des réseaux REPHY et SRN – Zones côtières de la Manche orientale et de la baie sud de la Mer du Nord – Bilan de l’année 2016. ArchiMer
Lefebvre, Alain; Ambiaud, Antonin.
The coastal zone of the Nord – Pas de Calais / Picardie showed dysfonctioning patterns of the ecosystem considered to be link to human activities along shores. These results in regular massive development of species, such as the phytoplanktonic seaweed, Phaeocystis sp. which life cycle was partly linked to nutrients availability and consequently to anthropogenic inputs. As part of the evaluation of the influence of continental inputs on the marine environment (nitrates, phosphates,…) and on potential eutrophication processes, of the estimation of the efficiency of the sewage treatments plants in the possible elimination of dumpings and in order to establish a long-term survey to follow up the change in coastal waters quality, the regional nutrients...
Tipo: Text Palavras-chave: Manche Orientale; Baie sud de la Mer du Nord; Hydrologie; Phytoplancton; Phaeocystis globosa; Eastern English Channel – southern bight of the North Sea; Hydrology; Phytoplankton; Phaeocystis globosa.
Ano: 2017 URL: http://archimer.ifremer.fr/doc/00396/50746/51459.pdf
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Résultats de la mise en oeuvre des réseaux REPHY et SRN. Zones côtières de la Manche orientale et de la baie sud de la Mer du Nord. Bilan de l'année 2018 ArchiMer
Clabaut, Thomas; Devreker, David; Lefebvre, Alain.
The coastal zone of the Nord – Pas-de-Calais / Picardie showed dysfonctioning patterns of the ecosystem considered to be link to human activities along shores. These results in regular massive development of species, such as the phytoplanktonic seaweed, Phaeocystis sp. which life cycle was partly linked to nutrients availability and consequently to anthropogenic inputs. As part of the evaluation of the influence of continental inputs on the marine environment (nitrates, phosphates,…) and on potential eutrophication processes, of the estimation of the efficiency of the sewage treatments plants in the possible elimination of dumpings and in order to establish a long-term survey to follow up the change in coastal waters quality, the regional nutrients...
Tipo: Text Palavras-chave: Manche Orientale; Baie sud de la Mer du Nord; Hydrologie; Phytoplancton; Phaeocystis globosa; Eastern English Channel; Hydrology; Phytoplankton; Phaeocystis globosa; Southern bight of the North Sea.
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00506/61790/65793.pdf
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Résultats de la mise en oeuvre des réseaux REPHY (Réseau Phytoplancton et Phycotoxines) et SRN (Suivi Régional des Nutriments). Zones côtières de la Manche orientale et de la baie sud de la Mer du Nord. Bilan de l'année 2017 ArchiMer
Lefebvre, Alain; Dussuel, Antoine.
The coastal zone of the Nord – Pas de Calais / Picardie showed dysfonctioning patterns of the ecosystem considered to be link to human activities along shores. These results in regular massive development of species, such as the phytoplanktonic seaweed, Phaeocystis sp. which life cycle was partly linked to nutrients availability and consequently to anthropogenic inputs. As part of the evaluation of the influence of continental inputs on the marine environment (nitrates, phosphates,…) and on potential eutrophication processes, of the estimation of the efficiency of the sewage treatments plants in the possible elimination of dumpings and in order to establish a long-term survey to follow up the change in coastal waters quality, the regional nutrients...
Tipo: Text Palavras-chave: Manche Orientale; Baie sud de la Mer du Nord; Hydrologie; Phytoplancton; Phaeocystis globosa; Eastern English Channel; Hydrology; Phytoplankton; Phaeocystis globosa; Southern bight of the North Sea.
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00448/55949/57429.pdf
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Suivi régional des nutriments (S.R.N.) sur le littoral du Nord, du Pas-de-Calais et de la Picardie - Bilan de l'année 2009 ArchiMer
Lefebvre, Alain; Cordier, Remy.
The coastal zone of the Nord- Pas de Calais 1 Picardie showed dysfonctioning patterns of the ecosystem considered to be link to human activities along shores. These results in regular massive development of species, such as the phytoplanktonic seaweed, Phaeocystis sp. which life cycle was partly linked to nutrients availability and consequently to anthropogenic inputs. As part of the evaluation of the influence of continental inputs on the marine environment (nitrates, phosphates, ... ) and on potential eutrophication processes, of the estimation of the efficiency of the sewage treatments plants in the possible elimination of dumpings and in order to establish a long-term survey to follow up the change in coastal waters quality, the regional nutrients...
Tipo: Text Palavras-chave: Qualité des eaux littorales; Manche orientale; Baie Sud de la mer du Nord; SurveillanceNutriments; Phytoplancton; Phaeocystis globosa; Quality of coastal waters; Eastern English Channel; Southern bight ofthe North Sea; MonitoringNutrients; Phytoplankton; Phaeocystis globosa.
Ano: 2010 URL: http://archimer.ifremer.fr/doc/00082/19363/16957.pdf
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Suivi régional des nutriments sur le littoral Nord - Pas de Calais / Picardie. Bilan de l'année 2012 ArchiMer
Nzigou, Aime Roger; Lefebvre, Alain.
The coastal zone of the Nord – Pas de Calais / Picardie showed dysfonctioning patterns of the ecosystem considered to be link to human activities along shores. These results in regular massive development of species, such as the phytoplanktonic seaweed, Phaeocystis sp. which life cycle was partly linked to nutrients availability and consequently to anthropogenic inputs. As part of the evaluation of the influence of continental inputs on the marine environment (nitrates, phosphates,…) and on potential eutrophication processes, of the estimation of the efficiency of the sewage treatments plants in the possible elimination of dumpings and in order to establish a long-term survey to follow up the change in coastal waters quality, the regional nutrients...
Tipo: Text Palavras-chave: Qualité des eaux littorales; Surveillance; Phaeocystis globosa; Manche Orientale; Coastal waters Quality; Monitoring; Phaeocystis globosa; –Eastern English Channel.
Ano: 2013 URL: http://archimer.ifremer.fr/doc/00153/26423/24526.pdf
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Suivi régional des nutriments sur le littoral Nord Pas-de-Calais Picardie. Bilan de l’année 2006. ArchiMer
Lefebvre, Alain; Dewaele, Kévin.
The coastal zone of the Nord – Pas de Calais / Picardie showed dysfonctioning patterns of the ecosystem considered to be link to human activities along shores. This results in regular massive development of species, such as the phytoplanktonic seaweed, Phaeocystis sp. which life cycle was partly linked to nutrients availability and consequently to anthropogenic inputs. As part of the evaluation of the influence of continental inputs on the marine environment (nitrates, phosphates,…) and on potential eutrophication processes, of the estimation of the efficiency of the sewage treatments plants in the possible elimination of dumpings and in order to establish a long-term survey to follow up the change in coastal waters quality, the regional nutrients...
Tipo: Text Palavras-chave: Qualité des eaux littorales; Surveillance; Phaeocystis globosa; Manche orientale; Quality of coastal waters; Monitoring; Phaeocystis globosa; Eastern English Channel.
Ano: 2007 URL: http://archimer.ifremer.fr/doc/00324/43473/42902.pdf
Registros recuperados: 11
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