文章基本信息

标题：A perspective on the importance of within-tree variation in mortality risk for a leaf-mining insect
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作者：Low, C. ; Hanley, D.
期刊名称：Web Ecology
印刷版ISSN：2193-3081
电子版ISSN：1399-1183
出版年度：2012
卷号：12
期号：1
页码：27-32
DOI：10.5194/we-12-27-2012
出版社：Department of Ecology, Lund university
摘要：Within-tree variation in abiotic conditions can create a mosaic of fitness gradients for herbivorous insects. To explore these effects, we quantified the patterns of mortality of the solitary oak leafminer, Cameraria hamadryadella (Lepidoptera: Gracillariidae), which lives within leaves of white oak, Quercus alba. We found differential patterns of survival and larval feeding rate within the tree and in association with several abiotic factors: light levels, leaf nitrogen content, and canopy height. We suggest that the leaf scale microhabitat conditions are fundamental to plant-herbivore-enemy interactions because of the differential fitness effects on herbivores. Such effects would be missed by studies that average effects by whole plants. Our study population of C. hamadryadella is located within the Orland E. White State Arboretum of Virginia in Boyce, Virginia, USA.