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Matthew Oates, National Trust

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"Packed with readable, thoughtful, up to date articles; written by ecologists and naturalists for ecologists and naturalists"

Nick Baker, Presenter and Naturalist

From issue:   Issue:   British Wildlife 09.4 April 1998

Squaring the Circles - bias in distribution maps

By - Tim CG Rich

Naturalists have been avidly recording plants and animals in Britain for centuries. The records are usually presented as 'dot' distribution maps (e.g. Perring & Walters 1962; Sharrock 1976; Harding & Sutton 1985; Arnold 1993), which are widely used for biogeography or assessing conservation status. However, after ten years of research and attempts to interpret the mapping data, I have come to the conclusion that such dot maps have severe limitations owing to the unsystematic way in which the data are recorded (Rich 1997a, 1997b, 1998; Rich & Smith 1996; Rich & Woodruff 1990, 1992, 1996).

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"British Wildlife is the pulsating heart of the UK nature conservation movement."

Matthew Oates, National Trust

"The most important and informative publication on wildlife of our times"

Michael McCarthy, The Independent

"Packed with readable, thoughtful, up to date articles; written by ecologists and naturalists for ecologists and naturalists"

Nick Baker, Presenter and Naturalist