The impact of climatic change on butterfly geography: does climatic change produce coincident trends in populations, distributions and ranges?

  title={The impact of climatic change on butterfly geography: does climatic change produce coincident trends in populations, distributions and ranges?},
  author={Peter B. Hardy and Tim H. Sparks and Roger L. H. Dennis},
  journal={Biodiversity and Conservation},
With climatic warming is the expectation of coincident changes in distributions and range limits driven by population changes. An outstanding question is whether such coincident changes (positive or negative) occur, especially in smaller regions in which management for change tends to be conducted. Using atlas and survey monitoring data (BMS) we studied population and distribution changes in 31 butterfly species in North West England over three recording periods (1940–1994, 1995–2001, 2001–2007… 
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