Algae: Diverse and Vital Organisms of Our Ecosystems

Algae are crucial organisms that produce more oxygen than all plants combined and serve as a vital food source for various marine animals. They are found worldwide in oceans and freshwater, lacking true roots, stems, or leaves. Algae perform photosynthesis using chlorophyll and exist in diverse forms and colors. Seaweeds, a type of large algae, thrive in shallow waters, with kelp being a notable example. Algae form symbiotic relationships, such as with coral, providing mutual benefits. They are sensitive indicators of environmental changes, highlighting the impacts of climate change. Algae's role in ecosystems underscores their importance on Earth.

Describe the symbiotic relationship between coral and Zooxanthella.

In what ways are algae used to assess water quality?