Many people in the United States regard beavers as pests who fell trees, cause floods in properties and steal water. In 2017 alone, more than 1700 beavers were eliminated in Washington state alone, and twenty times this number of beavers were eliminated. The U.S department of agriculture eliminated 23000 beavers according to media reports. However, many environmentalists believe that there many benefits in introducing beavers in areas which are infested with invasive weeds and plants since the beavers can help reduce the clogging of water bodies. It has been reported that Environmentalists bring in beavers to Washington river blighted by Japanese knotweed.
The environmentalists David Bailey and Molly Alves are trapping beavers in Washington and relocating them in areas owned by the Tulalip Tribes. These tribes are a sovereign nation with a population of approximately 5000 members, who depend on salmon and other fish. Though many have a negative opinion of the beaver, who Latin name is Castor canadensis, scientists are finding that the beavers are playing an important role in stream restoration. Many of the streams are clogged with weeds like Himalayan blackberry and knotweed, which affect the flow of water in the stream.
Introducing the beavers can help control the growth of the knot-weed in the streams. The beavers are using the stems of the knot weed which are similar to that of the rhubarb, to build their dams. When the growth of these plants is controlled, more fish varieties can flourish. A century ago, thousands of beavers were killed for their fur and only approximately 100,000 beavers were left in the U.S.
This adversely affected the environment, with Japanese knotweed and other weeds flourishing. This is where considerations for Japanese knotweed removal cost need to come into the picture. The fish like coho, salmon which lived in the rivers and streams were also affected, and their population reduced drastically. The beavers are also very good at building dams on the rivers and streams, intercepting the flow of water to create a network of ponds and channels. These are wetlands where a number of species are flourishing.
In some areas where the beavers were introduced, after a few years, there has been a very significant increase in the population of salmon, coho and other fish. In Maryland, ecologists claim that beavers can help in filtering out pollutants caused by agriculture and also improve water quality. In England, the native beaver species is being reintroduced in the hope that the dams and pond like complex which they are building will help in reducing the floods which damage
The treaty rights commissioner at Tutalip Tribes Kerry Williams noticed that his farmer friend’s crop had greatly improved after beavers built a network of ponds and improved the irrigation. Others have noted that the beavers help in providing the channels the salmon require to flourish. Hence environmentalists are trapping the beavers in cages, transporting them near the streams clogged with knotweed and releasing them.