Lopham and Redgrave Fen is one of only two locations for Dolomedes plantarius (the fen raft spider) in Britain. Its survival there is endangered by the drying-out of the fen as a result of water abstraction. 1995 was the fifth successive year in which systematic census work to assess the status of D. plantarius was undertaken on the Fen. It was also the fourth year in which management operations to maintain open conditions in the pools occupied by the spiders were conducted.
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