Consulta: creatorFacets:"Hartmann, Hans"
Registros recuperados: 2
Data/hora: 01/06/2024 10:36:46

Seasonal variations in planktonic community structure and production in an atlantic coastal pond: The importance of nanoflagellates
Provedor de dados: 5
Autores: Dupuy, Christine; Ryckaert, Mireille; Le Gall, Solange; Hartmann, Hans.
The structure and summertime production of planktonic communities and the role of nondiatom planktonic cells were studied in coastal ponds, which are areas traditionally used for fattening and greening table-sized oysters. The abundance and biomass of nano-microplanktonic protists were determined at weekly intervals between February 1998 and February 1999 in a coastal pond without oysters in the French Atlantic coast near La Rochelle. The production of these microbiotas was determined in the summer period. The structure of plankton communities revealed the following observations: (1) microphytoplanktonic cells were mostly diatoms and dinoflagellates, (2) microzooplanktonic cells were mainly ciliates, and (3) nanoplanktonic cells were represented by...
Tipo: Text
Palavras-chave: Food source microbial structure and production nanoflagellates; Coastal pond.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-2641.pdf

Potential Effect of Freshwater Virus on the Structure and Activity of Bacterial Communities in the Marennes-Oléron Bay (France)
Provedor de dados: 5
Autores: Auguet, Jean-christophe; Montanie, Helene; Hartmann, Hans; Lebaron, P.; Casamayor, E. O.; Catala, P.; Delmas, Daniel.
Batch culture experiments using viral enrichment were conducted to test the response of a coastal bacterial community to autochthonous (i.e., co-existing) or allochthonous riverine viruses. The effects of viral infections on bacterial dynamics and activity were assessed by epifluorescence microscopy and thymidine incorporation, respectively, whereas the effect of viral infection on bacterial community composition was examined by polymerase chain reaction-single strand conformation polymorphism 16S ribosomal RNA fingerprinting. The percentages of high nucleic acid-containing cells, evaluated by flow cytometry, were significantly correlated (r (2) = 0.91, n = 12, p &lt; 0.0001) to bacterial production, making this value a good predictor of active cell...
Tipo: Text
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-6636.pdf