Abstract:
:We examined the response of the birch tube-maker Acrobasis betulella Hulst (Lepidoptera: Pyralidae) to habitat patch isolation and edges. Density of A.␣betulella larva was higher on distant islands than on islands close to the shore. Following experimental removal of all larvae from the islands, adults were able to recolonize even the most distant islands, and larval density was again positively correlated with the degree of isolation. Larval density was not correlated with island size or the amount of birch present on the islands. Larvae on more distant islands did not have lower mortality than those in less isolated sites. Larvae were found more often on edges than in the interior of birch stands and developed faster on edges. This positive edge effect, coupled with the ability of the adults to disperse to even our most distant islands, suggests that A. betulella would be favored in an environment fragmented at the same scale as our island system.
journal_name
Oecologiajournal_title
Oecologiaauthors
Cappuccino N,Martin MAdoi
10.1007/s004420050134subject
Has Abstractpub_date
1997-03-01 00:00:00pages
69-76issue
1eissn
0029-8549issn
1432-1939pii
10.1007/s004420050134journal_volume
110pub_type
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