Question

Explain why scientists believe that threats to amphibians present a warning about a number of environmental threats to Earth’s biodiversity. *case study

Answer 1

Answer:

the answer is If the current rapid extermination of animals, plants and other species really is the "sixth mass extinction", then it is the amphibian branch of the tree of life that is undergoing the most drastic pruning.

If the current rapid extermination of animals, plants and other species really is the "sixth mass extinction", then it is the amphibian branch of the tree of life that is undergoing the most drastic pruning.In research described as "terrifying" by an independent expert, scientists predict the future for frogs, toads, newts and salamanders is even more bleak than conservationists had realised.

If the current rapid extermination of animals, plants and other species really is the "sixth mass extinction", then it is the amphibian branch of the tree of life that is undergoing the most drastic pruning.In research described as "terrifying" by an independent expert, scientists predict the future for frogs, toads, newts and salamanders is even more bleak than conservationists had realised.Around half of amphibian species are in decline, while a third are already threatened with extinction. But scientists now predict that areas with the highest diversity of amphibian species will be under the most intense threat in the future.

Explanation:

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Answer 2

• Scientists gives three reasons:

          Amphibians are sensitive biological indicator of changes in environmental conditions such as habitat loss, air and water pollution, ultraviolet(UV) radiation, and climate change...

          Third, amphibians are a genetic store-house of pharmaceutical products waiting to be discovered.

• Habitat loss and degradation is one of the greatest threats to amphibian and reptile populations and occurs from a variety of sources, including urban/ suburban development, aquatic habitat alteration from water withdrawal and stream diversions, water pollution, and off-road vehicle use in terrestrial habitats.
• By reducing pesticides and fertilizer use , you directly help inreducing that amount of chemical contamination that affects many amphibian species.
• Environmental estrogens are known to affect amphibian worldwide includes human being.
• Scientists estimate that a third or more of all the roughly 6,300 known species of amphibians are at risks of extinction.
• International Union for Conservation of Nature's (IUCN) Red list of threatened species.There are nearly as many species of amphibians categorised as threatened as those of threatened birds and mammals put together, with an estimated 40% of amphibians species in danger of extinction...