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| Cellamare, M.; Duval, C.; Drelin, Y.; Djediat, C.; Touibi, N.; Agogue, H.; Leboulanger, C.; Ader, M.; Bernard, C. |
| The saline-alkaline crater-lake Dziani Dzaha (Mayotte, Indian Ocean) is dominated by the bloom-forming cyanobacterium Arthrospira. However, the rest of the phototrophic community remains underexplored because of their minute dimension or lower biomass. To characterize the phototrophic microorganisms living in this ecosystem considered as a modern analog of Precambrian environments, several strains were isolated from the water column and stromatolites, and analyzed using the polyphasic approach. Based on morphological, ultrastructural and molecular (16S rRNA gene, 18S rRNA gene, 16S-23S ITS region, cpcBA-IGS locus) methods, seven filamentous cyanobacteria and the prasinophyte Picocystis salinarum were identified. Two new genera and four new cyanobacteria... |
| Tipo: Text |
Palavras-chave: Cyanobacteria; Microalgae; Crater-lake; Saline-alkaline lake; Polyphasic approach; Arthrospira. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00443/55469/56991.pdf |
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| Catherine, A; Troussellier, Marc; Bernard, C. |
| This study describes the design and application of a stratified sampling strategy of waterbodies to assess and analyze the distribution of cyanobacteria at a regional scale (Ile-de-France, IDF). Ten groups of hydrographical zones were defined within the IDF on the basis of their anthropogenic and geomorphologic characteristics. Sampling effort (n = 50) was then randomly allocated according to the number of waterbodies in each group. This sampling strategy was tested in August 2006, using a field probe to estimate total phyto-plankton as well as cyanobacteria biomasses. The sampled waterbodies exhibited a wide range of phytoplankton (<1-375 mu g equiv.Chla L-1) and cyanobacteria biomasses (<1-278 mu g equiv. Chla L-1). 72% of the waterbodies in the... |
| Tipo: Text |
Palavras-chave: Sampling strategy; Land use; Lakes and reservoirs; Geographic information system; Cyanobacteria. |
| Ano: 2008 |
URL: http://archimer.ifremer.fr/doc/2008/publication-5302.pdf |
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