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Changes in habitat specificity of species at their climatic range boundaries

Oliver, Tom; Hill, Jane K.; Thomas, Chris D.; Brereton, Tom; Roy, David B.. 2009 Changes in habitat specificity of species at their climatic range boundaries. Ecology Letters, 12 (10). 1091-1101. 10.1111/j.1461-0248.2009.01367.x

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Abstract/Summary

Species are thought to have more restricted niches towards their range boundaries, although this has rarely been quantified systematically. We analysed transect data for 41 butterfly species along climatic gradients within Britain and show that 71% of species have broader niches at sites with milder winters. Shifts in habitat associations are considerable across most species’ ranges; averaged across all 41 species, we estimate that if 26% of individuals were associated with the favoured habitat on the species’ warmest transect, then 70% of individuals would be confined to this habitat on the species’ coldest transect. Species with more southerly distributions in Britain showed the greatest changes in their habitat associations. We conclude that geographic variation in realised niche breadth is common and relatively large, especially near range boundaries, and should be taken into account in conserving species under changing climates.

Item Type: Publication - Article
Digital Object Identifier (DOI): 10.1111/j.1461-0248.2009.01367.x
Programmes: CEH Topics & Objectives 2009 onwards > Biodiversity > BD Topic 1 - Observations, Patterns, and Predictions for Biodiversity > BD - 1.3 - Long-term/large-scale monitoring and experiments ...
CEH Topics & Objectives 2009 onwards > Biodiversity > BD Topic 2 - Ecological Processes in the Environment > BD - 2.4 - Estimate the impact of the main drivers and pressures on biodiversity ...
CEH Sections: Pywell
ISSN: 1461-023X
Additional Information. Not used in RCUK Gateway to Research.: The definitive version is available at www.blackwell-synergy.com
Additional Keywords: Bioclimatic envelope model, butterfly habitat management, habitat associations, niche breadth, range margin
NORA Subject Terms: Ecology and Environment
Date made live: 10 Nov 2009 10:20
URI: http://nora.nerc.ac.uk/id/eprint/8211

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