Quiz: Algae

Bulletin of 19 March 2026

Which nutrient is most commonly responsible for triggering freshwater harmful algal blooms (HABs)?
Answer
Phosphorus.
Which feature makes microalgae attractive for biofuel production?
Answer
High lipid content and rapid growth.
Satellite monitoring of algal blooms most commonly relies on detecting changes in: a) Water temperature only. 2) Light reflectance related to pigments. c) Atmospheric nitrogen levels. d) Ocean salinity.
Answer
b) Light reflectance related to pigments.
South Australia has been experiencing a large marine algal bloom since March 2025. Which group of algae is primarily responsible?
Answer
Dinoflagellates (Karenia).
Which edible seaweed species commonly used in sushi belongs to the red algae group?
Answer
Porphyra (nori).

Previous quizzes