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Synchrony of Population Fluctuations: The Dominant Influence of Widespread Factors on Local Butterfly Populations

E. Pollard
Oikos
Vol. 60, No. 1 (Feb., 1991), pp. 7-10
Published by: Wiley on behalf of Nordic Society Oikos
DOI: 10.2307/3544985
Stable URL: http://www.jstor.org/stable/3544985
Page Count: 4
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Synchrony of Population Fluctuations: The Dominant Influence of Widespread Factors on Local Butterfly Populations
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Abstract

Fluctuations in the abundance of butterflies at many sites in Britain are monitored in a national scheme. Both annual fluctuations and long term trends at individual sites are often very closely synchronised with regional data which excludes the study sites. I argue from such synchrony: (1) that these population are likely to be limited by density-dependent factors and (2) that population fluctuations are little influenced by interactions which are specific to local communities.

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