Beavers, large members of the rodent family in north America, are often referred as ecosystem/keystone engineers. Ecosystem engineers are described as animals that create, alter or destroy a habitat. Beavers contribute to river ecosystems by bringing down old and dead trees along riverbanks. They use these trees to make their dam. Although, dams are primarily used for protection and food storage, scientists report that these dams change the surrounding environment in different ways. given this information, describe the potential benefits that beavers contribute to the ecosystem as keystone engineers and describe a plausible impact that the removal of beavers could have on the surrounding ecosystems