Native leaf‐tying caterpillars influence host plant use by the invasive Asiatic oak weevil through ecosystem engineering

Christina Baer; Robert Marquis

doi:10.1890/13-1689.1

Native leaf‐tying caterpillars influence host plant use by the invasive Asiatic oak weevil through ecosystem engineering

Christina Baer, Robert Marquis

University of Missouri-St. Louis

Research output: Contribution to journal › Article › peer-review

Abstract

<div class="line" id="line-15"> We tested the effect of leaf&hyphen;tying caterpillars, native ecosystem engineers, on the abundance and host feeding of an invasive insect, the Asiatic oak weevil,  Cyrtepistomus castaneus  (Roelofs). Leaf quality was previously thought to be the sole factor determining host use by  C. castaneus  , but adult weevils congregate in leaf ties made by lepidopteran larvae (caterpillars). Adult weevil abundance was naturally higher on  Quercus alba  and  Q. velutina  compared to four other tree species tested ( Acer rubrum  ,  Carya ovata  ,  Cornus florida  , and  Sassafras albidum  ). These differences were associated with more natural leaf ties on the two  Quercus  species. In the laboratory, weevils fed on all six species but again preferred  Q. alba  and  Q. velutina  . When artificial ties were added to all six tree species, controlling for differences in leaf&hyphen;tie density, adult weevil density increased on all six tree species, damage increased on all species but  A. rubrum  , and host ranking changed based on both abundance and damage. We conclude that leaf ties increase the local abundance of  C. castaneus  adults and their feeding. Thus, these native leaf&hyphen;tying caterpillars engender the success of an invasive species via structural modification of potential host plants, the first described example of this phenomenon. </div>

Original language	American English
Journal	Ecology
Volume	95
DOIs	https://doi.org/10.1890/13-1689.1
State	Published - Jun 2014

Disciplines

Life Sciences

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Cite this

@article{f329967426d74b3a947e52d0e6b31452,

title = "Native leaf‐tying caterpillars influence host plant use by the invasive Asiatic oak weevil through ecosystem engineering",

abstract = " We tested the effect of leaf&hyphen;tying caterpillars, native ecosystem engineers, on the abundance and host feeding of an invasive insect, the Asiatic oak weevil,  Cyrtepistomus castaneus  (Roelofs). Leaf quality was previously thought to be the sole factor determining host use by  C. castaneus  , but adult weevils congregate in leaf ties made by lepidopteran larvae (caterpillars). Adult weevil abundance was naturally higher on  Quercus alba  and  Q. velutina  compared to four other tree species tested ( Acer rubrum  ,  Carya ovata  ,  Cornus florida  , and  Sassafras albidum  ). These differences were associated with more natural leaf ties on the two  Quercus  species. In the laboratory, weevils fed on all six species but again preferred  Q. alba  and  Q. velutina  . When artificial ties were added to all six tree species, controlling for differences in leaf&hyphen;tie density, adult weevil density increased on all six tree species, damage increased on all species but  A. rubrum  , and host ranking changed based on both abundance and damage. We conclude that leaf ties increase the local abundance of  C. castaneus  adults and their feeding. Thus, these native leaf&hyphen;tying caterpillars engender the success of an invasive species via structural modification of potential host plants, the first described example of this phenomenon. ",

author = "Christina Baer and Robert Marquis",

year = "2014",

month = jun,

doi = "10.1890/13-1689.1",

language = "American English",

volume = "95",

journal = "Ecology",

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T1 - Native leaf‐tying caterpillars influence host plant use by the invasive Asiatic oak weevil through ecosystem engineering

AU - Baer, Christina

AU - Marquis, Robert

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N2 - We tested the effect of leaf&hyphen;tying caterpillars, native ecosystem engineers, on the abundance and host feeding of an invasive insect, the Asiatic oak weevil,  Cyrtepistomus castaneus  (Roelofs). Leaf quality was previously thought to be the sole factor determining host use by  C. castaneus  , but adult weevils congregate in leaf ties made by lepidopteran larvae (caterpillars). Adult weevil abundance was naturally higher on  Quercus alba  and  Q. velutina  compared to four other tree species tested ( Acer rubrum  ,  Carya ovata  ,  Cornus florida  , and  Sassafras albidum  ). These differences were associated with more natural leaf ties on the two  Quercus  species. In the laboratory, weevils fed on all six species but again preferred  Q. alba  and  Q. velutina  . When artificial ties were added to all six tree species, controlling for differences in leaf&hyphen;tie density, adult weevil density increased on all six tree species, damage increased on all species but  A. rubrum  , and host ranking changed based on both abundance and damage. We conclude that leaf ties increase the local abundance of  C. castaneus  adults and their feeding. Thus, these native leaf&hyphen;tying caterpillars engender the success of an invasive species via structural modification of potential host plants, the first described example of this phenomenon.

AB - We tested the effect of leaf&hyphen;tying caterpillars, native ecosystem engineers, on the abundance and host feeding of an invasive insect, the Asiatic oak weevil,  Cyrtepistomus castaneus  (Roelofs). Leaf quality was previously thought to be the sole factor determining host use by  C. castaneus  , but adult weevils congregate in leaf ties made by lepidopteran larvae (caterpillars). Adult weevil abundance was naturally higher on  Quercus alba  and  Q. velutina  compared to four other tree species tested ( Acer rubrum  ,  Carya ovata  ,  Cornus florida  , and  Sassafras albidum  ). These differences were associated with more natural leaf ties on the two  Quercus  species. In the laboratory, weevils fed on all six species but again preferred  Q. alba  and  Q. velutina  . When artificial ties were added to all six tree species, controlling for differences in leaf&hyphen;tie density, adult weevil density increased on all six tree species, damage increased on all species but  A. rubrum  , and host ranking changed based on both abundance and damage. We conclude that leaf ties increase the local abundance of  C. castaneus  adults and their feeding. Thus, these native leaf&hyphen;tying caterpillars engender the success of an invasive species via structural modification of potential host plants, the first described example of this phenomenon.

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