One example of a bio indicator is lichen. Lichen are a symbiotic organism consisting of a fungus and an algae, and are very sensitive to changes in their environment. They are able to absorb nutrients and moisture directly from the air and are often found on trees, rocks, and other surfaces.
Lichen are important bio indicators because they are sensitive to air pollution and can indicate the presence of harmful substances such as sulfur dioxide and heavy metals in the environment. By monitoring the health and abundance of lichen populations, scientists can determine the level of pollution in an area and assess the impact of human activities on the environment. This information can then be used to inform environmental policies and actions to protect ecosystems and human health.
Give an example of a bio indicator, and explain why they are important.
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