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Factors Affecting the Distribution of Satyrid Butterflies on Arable Farmland
John W. Dover
Journal of Applied Ecology
Vol. 33, No. 4 (Aug., 1996), pp. 723-734
Published by: British Ecological Society
Stable URL: http://www.jstor.org/stable/2404943
Page Count: 12
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1. The effects of biotic and abiotic factors on the distribution of three species of satyrid butterfly (Aphantopus hyperantus, Pyronia tithonus and Maniola jurtina) in arable field margins were studied in a block of arable farmland on a North Hampshire farm. 2. Non-floral factors affecting distribution included the degree of shelter, insolation, width of hedgebank or grass verge, and uncultivated habitat. Farm tracks adjacent to the field boundaries exerted a negative effect on abundance. 3. Floral variables affecting distribution included the abundance of flowers of bramble (Rubus fruticosus), thistle-like Compositae, marjoram (Origanum vulgare) and mayweeds (Matricaria spp.) in conservation headlands. Negative variables included abundance of cow parsley (Anthriscus sylvestris) and old man's beard (Clematis vitalba); although the latter was negative for A. hyperantus and M. jurtina, it was a positive variable for P. tithonus. 4. The distribution of butterflies in arable field margins is discussed in relation to landscape structure, microclimate and resources.
Journal of Applied Ecology © 1996 British Ecological Society