Microclimate affects landscape level persistence in the British Lepidoptera

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• 作者：Andrew J. Suggitt ; Robert J. Wilson ; Tom A. August…
• 关键词：Global change ; Topoclimate ; Microrefugia ; Range shift ; Habitat ; Topography
• 刊名：Journal of Insect Conservation
• 出版年：2015
• 出版时间：April 2015
• 年：2015
• 卷：19
• 期：2
• 页码：237-253
• 全文大小：1,257 KB
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• 作者单位：Andrew J. Suggitt (1) (2)
  Robert J. Wilson (2)
  Tom A. August (3)
  Richard Fox (4)
  Nick J. B. Isaac (3)
  Nicholas A. Macgregor (5)
  Michael D. Morecroft (5)
  Ilya M. D. Maclean (1)
  
  1. Environment and Sustainability Institute, University of Exeter - Penryn Campus, Penryn, Cornwall, UK
  2. Department of Biosciences, University of Exeter - Streatham Campus, Exeter, Devon, UK
  3. Centre for Ecology and Hydrology, Maclean Building, Benson Lane, Crowmarsh Gifford, Oxfordshire, UK
  4. Butterfly Conservation, Manor Yard, East Lulworth, Wareham, Dorset, UK
  5. Natural England, Nobel House, 17 Smith Square, London, UK
  
• 刊物类别：Biomedical and Life Sciences
• 刊物主题：Life Sciences
  Animal Systematics/Taxonomy/ Biogeography
  Evolutionary Biology
  Human Genetics
  
• 出版者：Springer Netherlands
• ISSN：1572-9753

文摘

Microclimate has been known to drive variation in the distribution and abundance of insects for some time. Until recently however, quantification of microclimatic effects has been limited by computing constraints and the availability of fine-scale biological data. Here, we tested fine-scale patterns of persistence/extinction in butterflies and moths against two computed indices of microclimate derived from Digital Elevation Models: a summer solar index, representing fine-scale variation in temperature, and a topographic wetness index, representing fine-scale variation in moisture availability. We found evidence of microclimate effects on persistence in each of four 20?×?20?km British landscapes selected for study (the Brecks, the Broads, Dartmoor, and Exmoor). Broadly, local extinctions occurred more frequently in areas with higher minimum or maximum solar radiation input, while responses to wetness varied with landscape context. This negative response to solar radiation is consistent with a response to climatic warming, wherein grid squares with particularly high minimum or maximum insolation values provided an increasingly adverse microclimate as the climate warmed. The variable response to wetness in different landscapes may have reflected spatially variable trends in precipitation. We suggest that locations in the landscape featuring cooler minimum and/or maximum temperatures could act as refugia from climatic warming, and may therefore have a valuable role in adapting conservation to climatic change.