These animals offer key clues for environmental change
https://www.nationalgeographic.co.uk/animals/2021/09/these-animals-offer-key-clues-for-environmental-change
WebSep 20, 2021 · An indicator species is an organism—bacteria, plant, or animal—that reflects the condition of the environment around it. They’re often the first in their ecosystem to be affected by a particular environmental change, such as a warming climate, pollution, human development, and other environmental degradation.
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