ALEXIS ROSENFELD / SCIENCE PHOTO LIBRARY ALEXIS ROSENFELD / SCIENCE PHOTO LIBRARY
Microalgae research. Scientist Jean Turquet with marine measuring apparatus. This environmental marker takes measurements of temperature, pH, salt level and current. The data is used to evaluate in which environmental conditions populations of microalgae proliferate. Some species of microalgae contain a toxin which accumulates in the food chain and can cause ciguatera poisoning in humans. Photographed in the Glorious Islands, in the Indian Ocean.
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