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The extinction and foundation of local butterfly populations in relation to population variability and other factors
Author(s) -
POLLARD E.,
YATES T. J.
Publication year - 1992
Publication title -
ecological entomology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.865
H-Index - 81
eISSN - 1365-2311
pISSN - 0307-6946
DOI - 10.1111/j.1365-2311.1992.tb01055.x
Subject(s) - butterfly , extinction (optical mineralogy) , biology , population , abundance (ecology) , statistics , index (typography) , regression , ecology , regression analysis , demography , mathematics , sociology , world wide web , computer science , paleontology
.1 Definitions were adopted for the identification of the extinction and foundation of populations in data from the Butterfly Monitoring Scheme from 1976 to 1991. The data are indexes of abundance, not population estimates. 2 The frequency of extinctions and foundations for twenty‐eight butterfly species was assessed in relation to characteristics of their population fluctuations, as indicated by fluctuations in the index values. 3 Using multiple regression, the best predictive equation for the number of extinctions plus foundations included the number of test data available, the mean index per site and the first serial correlation. Two measures of variability were included in the analysis, but were not retained in the best predictive equation. 4 Some results for individual species are described and the potential of the approach for the study of effects of climatic warming is emphasized.