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To quote Paul Knight, Chief Executive of S&TC UK:
“Most of the rivers we analysed were impacted to some extent, although the chalk rivers were the worst. England’s 200 or so chalkstreams form about 85% of the world’s total stock of this richly diverse and complex habitat. Almost all of them are in a dismal state of decline. Plants, insects, fish, mammals and bird-life are suffering as a result of the loss of flylife, which plays a crucial role in the aquatic food chain. Basically lose your flylife and you will lose many other important species too.”