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Ecology, 80(6), 1999, pp. 20742084 1999 by the Ecological Society of America
 

Summary: 2074
Ecology, 80(6), 1999, pp. 2074­2084
1999 by the Ecological Society of America
MUTUALISTIC INTERACTIONS BETWEEN UPIGA VIRESCENS
(PYRALIDAE), A POLLINATING SEED-CONSUMER, AND
LOPHOCEREUS SCHOTTII (CACTACEAE)
J. NATHANIEL HOLLAND1
AND THEODORE H. FLEMING
Department of Biology, University of Miami, Coral Gables, Florida 33124 USA
Abstract. Pollinating seed-consuming interactions are rare, but include fig­fig wasp
and yucca­yucca moth interactions, both of which are thought to be coevolved. Conditions
favoring such mutualisms are poorly known but likely include plants and pollinators whose
life cycles are synchronized. In this paper, we describe a new pollinating seed-consumer
mutualism between a Sonoran Desert cactus, Lophocereus schottii (senita cactus), and a
pyralid moth, Upiga virescens (senita moth). We compare this mutualism with the yucca
mutualism in terms of life history traits, active pollination, and selective abortion. Senita
cactus flowers were pollinated nearly exclusively by nocturnal senita moths, but a few
halictid bees also pollinated flowers. Only 40% of flowers set fruit during the years of
study, apparently due to resource limitation. All phases of the senita moth's life history
were associated with the senita cactus. During flower visitation, female senita moths col-

  

Source: Azevedo, Ricardo - Department of Biology and Biochemistry, University of Houston
Holland, J. Nathaniel - Department of Ecology and Evolutionary Biology, Rice University

 

Collections: Biology and Medicine; Environmental Sciences and Ecology