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Megan Marchetti Thesis.pdf (570.05 KB)

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The effects of a glyphosate−based herbicide (Roundup®) and temperature on the foraging of the wolf spider Pardosa milvina (Araneae: Lycosidae)

Marchetti, Megan Faith
http://rave.ohiolink.edu/etdc/view?acc_num=miami1399451130

Abstract Details

2014, Master of Science, Miami University, Zoology.
Animals living in terrestrial agroecosystems are faced with both natural and anthropogenic stressors simultaneously. Consequently, important interactions between animals that comprise agricultural food webs can be disrupted. The wolf spider, Pardosa milvina, is a common generalist predator in fields where glyphosate−based herbicides (Roundup®) are sprayed during warm summer months. I conducted laboratory and field experiments that explored the effects of both herbicide presence and environmental temperature on Pardosa foraging success. Spiders ate more crickets in high temperatures, and especially increased consumption during the first three hours of foraging. Herbicide presence induced superfluous prey killing by spiders, and under field conditions spiders were more likely to return and scavenge on dead prey. These results suggest that herbicide and temperature both affect the foraging of Pardosa. Further, my data show that glyphosate−based herbicides used in the field may have little effect on Pardosa's role in agricultural food webs and biocontrol.
Ann Rypstra, PhD (Advisor)
Richard Lee, PhD (Committee Member)
Michelle Boone, PhD (Committee Member)
Animals; Biology; Ecology; Zoology
foraging; herbicide; glyphosate; Roundup; temperature; spider; Pardosa

Recommended Citations

Citations

  • Marchetti, M. F. (2014). The effects of a glyphosate−based herbicide (Roundup®) and temperature on the foraging of the wolf spider Pardosa milvina (Araneae: Lycosidae) [Master's thesis, Miami University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=miami1399451130

    APA Style (7th edition)

  • Marchetti, Megan. The effects of a glyphosate−based herbicide (Roundup®) and temperature on the foraging of the wolf spider Pardosa milvina (Araneae: Lycosidae). 2014. Miami University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=miami1399451130.

    MLA Style (8th edition)

  • Marchetti, Megan. "The effects of a glyphosate−based herbicide (Roundup®) and temperature on the foraging of the wolf spider Pardosa milvina (Araneae: Lycosidae)." Master's thesis, Miami University, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=miami1399451130

    Chicago Manual of Style (17th edition)

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© 2014, all rights reserved.
This open access ETD is published by Miami University and OhioLINK.