Animals: Creatures That Roam the Planet (Natural Resources) by Julie Kerr Casper PhD

By Julie Kerr Casper PhD

Throughout the process hundreds of thousands of years, animals have tailored to numerous environments on the earth. even though animals have advanced over geologic time to Earth's consistently altering environments, and even if the extinctions of definite species are basic, in no different time within the planet's historical past has the extinction fee climbed as excessive because it is at the present time. explanations of this remarkable extinction price comprise destruction of flora and fauna habitat, pollutants, overfishing, and poaching. "Animals" illustrates those pressing concerns in a fashion obtainable to heart and highschool readers.

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Therefore, it ultimately took the consumption of all the grass, grasshoppers, mice, and snakes to feed the eagle. This concept is referred to as a food pyramid. Biological magnification is another important concept. It is the tendency of pollutants to become concentrated in successive trophic levels. This is bad for the organisms up the food chain because the pollutants get concentrated, and they are often toxic. The pollutants are usually introduced into the food web at the bottom of the food chain—for example, in the surrounding soil or water plants grow in.

In real life, however, an organism doesn’t usually stick with just one food source—it eats a varied diet of many components. Scientists use food webs to study the interactions between many animals from producers to consumers. Food webs demonstrate the complexity of the interdependence of living things within a habitat. The elimination of the smallest link in the food chain can upset the delicate balance of nature’s food supplies. Typically, in a food web, the producer is on the bottom, and the final consumers are at the top.

Since there is not much heat from the sun to warm their eggs, taiga reptiles give birth to live young. Many of the animals are large, which makes it easier for them to conserve heat. Because of this, elk and wildlife concepts and geographical distribution wolverine are common in the taiga. In order to capture prey, the wolverine’s ­well-­furred feet enable it to run across the thin crust of snow. In mountain environments, small mammals live in burrows and hibernate during the winter. Larger animals are usually very agile.

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