LIFE SCIENCE

Detailed explanation-1: -In and near the park, researchers focus on two indicator species: green frogs and gray tree frogs. Both make great indicator species because they are super easy to find. They are noisy, so researchers know where to look for them. If these species hid all the time or were rare, they would not make good indicators.

Detailed explanation-2: -indicator species, organism-often a microorganism or a plant-that serves as a measure of the environmental conditions that exist in a given locale. For example, greasewood indicates saline soil; mosses often indicate acid soil. Tubifex worms indicate oxygen-poor and stagnant water unfit to drink.

Detailed explanation-3: -Frogs are amphibians, which are cold-blooded vertebrates, meaning they have backbones, that don’t have scales. Amphibians live both on land and in water. Other amphibians include salamander, newt, and caecilian.

Detailed explanation-4: -Lichen can be used to study air pollution. Spotted owls populations have been in decline due to habitat loss. Mayflies are used to indicate the quality of freshwater. The migratory habits of salmon make them vulnerable to environmental changes. More items