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Oecologia

Title:		Herbivorous mites as ecological engineers: indirect effects on arthropods inhabiting papaya foliage
Author(s):		Fournier V; Rosenheim JA; Brodeur J; Laney LO; Johnson MW;
Address:		"Department of Entomology, University of California, Davis, CA 95616, USA. valfourn@yahoo.ca"
Journal Title:		Oecologia
Year:		2003
Volume:		20030311
Issue:		3
Page Number:		442 - 450
DOI:		10.1007/s00442-003-1212-9
ISSN/ISBN:		0029-8549 (Print) 0029-8549 (Linking)
Abstract:		"We examined the potential of a leaf roller to indirectly influence a community of arthropods. Two mite species are the key herbivores on papaya leaves in Hawaii: a spider mite, Tetranychus cinnabarinus Boisduval, and an eriophyid mite, Calacarus flagelliseta, which induces upward curling of the leaf margin at the end of the summer when populations reach high densities. A survey and three manipulative field experiments demonstrated that (1) leaf rolls induce a consistent shift in the spatial distribution of spider mites and their predators, the coccinellid Stethorus siphonulus Kapur, the predatory mites Phytoseiulus spp., and the tangle-web building spider Nesticodes rufipes Lucas; (2) the overall abundance of spiders increases on leaves with rolls; (3) the specialist predators Stethorus and Phytoseiulus inhabit the rolls in response to their spider mite prey; and (4) the spider inhabits the rolls in response to the architecture of the roll itself. This study shows the importance of indirect effects in structuring a terrestrial community of herbivores"
Keywords:		"Animals Carica/*anatomy & histology *Feeding Behavior *Food Chain Plant Leaves/*anatomy & histology *Plants, Edible Population Dynamics Spiders *Tetranychidae;"
Notes:		"MedlineFournier, Valerie Rosenheim, Jay A Brodeur, Jacques Laney, Lee O Johnson, Marshall W eng Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S. Germany 2003/05/02 Oecologia. 2003 May; 135(3):442-50. doi: 10.1007/s00442-003-1212-9. Epub 2003 Mar 11"