Skip to content
Home
About Us
Resources
Profiles Metrics
Authors Directory
Institutions Directory
Top Authors
Top Institutions
Top Sponsors
AI Digest
Contact Us
Menu
Home
About Us
Resources
Profiles Metrics
Authors Directory
Institutions Directory
Top Authors
Top Institutions
Top Sponsors
AI Digest
Contact Us
Home
About Us
Resources
Profiles Metrics
Authors Directory
Institutions Directory
Top Authors
Top Institutions
Top Sponsors
AI Digest
Contact Us
Menu
Home
About Us
Resources
Profiles Metrics
Authors Directory
Institutions Directory
Top Authors
Top Institutions
Top Sponsors
AI Digest
Contact Us
Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
agricultural and biological sciences
Low consumption of virus-sized particles by heterotrophic nanoflagellates in two lakes of the French Massif Central
Aquatic Microbial Ecology, Volume 39, No. 2, Year 2005
Notification
URL copied to clipboard!
Description
Seasonal and depth-related variability in the grazing activity of heterotrophic nanoflagellates (HNF) on viruses was examined in the oligo-mesotrophic Lake Pavin and in the eutrophic Lake Aydat, French Massif Central, between May and November 2000. Ingestion rates (IR) were determined using 50 nm diameter fluorescent microspheres, as virus analogues. In both lakes, highest grazing activities on virus-sized particles were recorded in the metalimnion, at the beginning and the end of the thermal stratification period. Estimated IRs in Lake Pavin (mean = 0.4 viruses HNF-1 h-1, CV = 38.0%) and in Lake Aydat (mean = 0.3 viruses HNF-1 h -1, CV = 35.6%) were not significantly different, in contrast to clearance rates (CR), which were significantly higher in the oligomesotrophic (2.3 × 10-2 nl HNF-1 h-1) than in the eutrophic lake (0.7 × 10-2 nl HNF-1 h-1). CRs for viruses were correlated with CRs for bacteria in Lake Aydat but not in Lake Pavin, suggesting a greater abundance within the HNF assemblages of virus-sized particle feeders in the less productive lake. We estimated that 4.1 and 0.8% of viral production were grazed by HNF in Lake Pavin and Lake Aydat, respectively. Finally, although viruses seem to represent a minor food source for HNF (i.e. compared to bacteria), they may not be inconsequential in their diet, especially in oligotrophic lakes. © Inter-Research 2005.
Authors & Co-Authors
Bettarel, Y.
Senegal, Dakar
Institut de Recherche Pour le Développement Dakar
Sime Ngando, T.
France, Paris
Cnrs Centre National de la Recherche Scientifique
Bouvy, Marc
Senegal, Dakar
Institut de Recherche Pour le Développement Dakar
Arfi, Robert
Senegal, Dakar
Institut de Recherche Pour le Développement Dakar
Amblard, Christian A.
France, Paris
Cnrs Centre National de la Recherche Scientifique
Statistics
Citations: 85
Authors: 5
Affiliations: 2
Identifiers
Doi:
10.3354/ame039205
ISSN:
09483055
Research Areas
Food Security