Related Experiment Videos
Vibrios associated with red tides caused by Mesodinium rubrum
J L Romalde1, J L Barja, A E Toranzo
1Departmento de Microbiología y Parasitología, Facultad de Biología, Universidad de Santiago, Santiago de Compostela, Spain.
Applied and Environmental Microbiology
|November 1, 1990
Summary
Vibrio species were identified in Spanish red tides and throughout the year. Cytotoxicity was not linked to Vibrio species found during red tides, suggesting complex ecological interactions.
Area of Science:
- Marine microbiology
- Bacterial ecology
- Red tide phenomena
Background:
- Vibrio species are common marine bacteria.
- Red tides, caused by algal blooms like Mesodinium rubrum, can impact marine ecosystems.
- Understanding Vibrio populations during these events is crucial for ecological assessments.
Purpose of the Study:
- To investigate the diversity and characteristics of Vibrio isolates from red tides and surrounding waters.
- To determine the association between specific Vibrio species and red tide events.
- To assess the cytotoxic potential of Vibrio isolates in relation to their occurrence during red tides.
Main Methods:
- Isolation and identification of Vibrio species from water samples.
- Numerical taxonomy for phenetic grouping of isolates.
- Cytotoxicity assays using various cell lines (poikilothermic and homoiothermic).
Main Results:
- Four Vibrio phena (Vibrio alginolyticus, Vibrio tubiashii, Vibrio anguillarum) were associated with red tides.
- Vibrio anguillarum-like strains were prevalent year-round outside red tide areas.
- Cytotoxin production was not consistently observed in Vibrio species linked to red tides.
Conclusions:
- Vibrio populations exhibit distinct patterns related to Mesodinium rubrum red tides.
- The ecological role of Vibrio species during red tides may not be solely defined by cytotoxic activity.
- Further research is needed to elucidate the interactions between Vibrio, algae, and the marine environment.