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Evolution à court terme des effectifs et de l'activité des communautés bactériennes dans des écosystèmes d'aquaculture ArchiMer
Bianchi, Armand J.; Bianchi, Micheline A..
SHORT-TERM VARIATION OF BACTERIAL COMMUNITIES CONCENTRATION AND ACTIVITY IN AQUACULTURE ECOSYSTEMS. Two kinds of short-term experiments were carried out on sea-water bacterial commun­ities of shrimp aquaculture in Polynesia at the Centre Océanologique du Pacifique (Tahiti). A 12 m3 sea-water tank was considered. The total number (AOC) and hétérotrophie activity of bacteria were studied during a 48 hours experiment with a 2 hours sampling time The total bacterial community was about 10? bacteria, and nitrifying bacteria were about 10 bacteria ml-1 and could showed doubling time of 7 hours. Several nitrogen sources were added in five liter flasks. With N-NH4 enrichment no great changes in activity and number could be seen. With organic nitrogen the number of...
Tipo: Text Palavras-chave: Dynamique; Numération; Activité; Communautés bactériennes; Aquiculture.
Ano: 1982 URL: http://archimer.ifremer.fr/doc/00306/41744/40955.pdf
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Les microplastiques : une menace en rade de Brest ? ArchiMer
Frere, Laura.
World production of plastics has increased steadily for the past decades leading to a major contamination of the worldwide aquatic ecosystems recently estimated at more than five trillion plastic pieces floating the surface of the oceans. Microplastics (plastic particles < 5 mm) are introduced into aquatic environments directly as industrial raw material (plastic pellets, cosmetics, clothing) or indirectly via the fragmentation of larger plastics. This emerging contaminant represents an increasing ecological concern for science and society. The present study focused on the microplastic contamination of the Bay of Brest (Brittany, France), a macrotidal coastal ecosystem characterized by intense anthropogenic activity. The main objectives were: (1) to...
Tipo: Text Palavras-chave: Microplastiques; Micro-spectroscopie Raman; Matrices environnementales; Rade de Brest; Polluant organique; Communautés bactériennes; Microplastics; Micro-spectroscopy Raman; Environmental matrices; Bay of Brest; Organic pollutant; Bacterial communities.
Ano: 2017 URL: https://archimer.ifremer.fr/doc/00497/60913/64266.pdf
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