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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)
| Content Provider | Semantic Scholar |
|---|---|
| Author | Marchetti, Megan Faith |
| Copyright Year | 2014 |
| Abstract | THE EFFECTS OF A GLYPHOSATE-BASED HERBICIDE (ROUNDUP®) AND TEMPERATURE ON THE FORAGING OF THE WOLF SPIDER PARDOSA MILVINA (ARANEAE: LYCOSIDAE) by Megan Faith Marchetti 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. THE EFFECTS OF A GLYPHOSATE-BASED HERBICIDE (ROUNDUP®) AND TEMPERATURE ON THE FORAGING OF THE WOLF SPIDER PARDOSA MILVINA (ARANEAE: LYCOSIDAE) |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://etd.ohiolink.edu/!etd.send_file?accession=miami1399451130&disposition=attachment |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
