Dr Malcolm Greenhalgh, author of the Collins book on Freshwater life, along with Dr Mike Dempsey, talked about diatoms, phytobenthos and macrophytes and their role in supporting invertebrate and fish populations in our rivers.  Mersey Rivers Trust colleagues and friends enjoyed a lively discussion, with fascinating anecdotes, about the river habitat of various rivers in the Mersey catchment.  Armed with this knowledge, we are better equipped and inspired to look for ways to improve the ecosystems that live in our rivers.