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Indicator Species: Using Frogs and Salamanders to Gauge Ecosystem Health

Ecologists and environmental scientists use a wide range of plants and animals as “indicator species” to get an idea about ecosystem health of streams and forests. Some of these species are tolerant of pollution — such as certain bacteria or algae — so their presence indicates the presence of pollutants like sewage. Other species are intolerant of pollution or environmental ...

John Marshall | Jun 6, 2013

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