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Freshwater Biological Association, 2022. x, 215, line drawings, col photos, distribution maps. . PB. NEW. . Plecoptera (Stoneflies) are an extremely important component of British and Irish freshwaters, and are most common in clean headwater streams and on stony and rocky shorelines of lakes. This book provides keys to both the adult and larvae of the 35 species found in Britain and Ireland. Our freshwater ecosystems are under more pressure than ever from a bewildering array of threats. Keys such as this are a vital tool to support the collection and analysis of robust data and evidence required to enable better and faster conservation action for freshwaters. But this is so much more than a key. It’s a comprehensive source of existing and new knowledge for anyone with an interest in freshwater ecology and entomology.. [9780900386855]