Pattern of seasonal variation in rates of predation between spider families is temporally stable in a food web with widespread intraguild predation

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dc.citation.articleNumbere0293176en_US
dc.citation.issueNumber10en_US
dc.citation.journalTitlePLOS ONEen_US
dc.citation.volumeNumber18en_US
dc.contributor.authorWise, David H.en_US
dc.contributor.authorMores, Robin M.en_US
dc.contributor.authorO, Jennifer M. Pajda-De Laen_US
dc.contributor.authorMcCary, Matthew A.en_US
dc.date.accessioned2024-05-03T15:51:11Zen_US
dc.date.available2024-05-03T15:51:11Zen_US
dc.date.issued2023en_US
dc.description.abstractIntraguild predation (IGP)–predation between generalist predators (IGPredator and IGPrey) that potentially compete for a shared prey resource–is a common interaction module in terrestrial food webs. Understanding temporal variation in webs with widespread IGP is relevant to testing food web theory. We investigated temporal constancy in the structure of such a system: the spider-focused food web of the forest floor. Multiplex PCR was used to detect prey DNA in 3,300 adult spiders collected from the floor of a deciduous forest during spring, summer, and fall over four years. Because only spiders were defined as consumers, the web was tripartite, with 11 consumer nodes (spider families) and 22 resource nodes: 11 non-spider arthropod taxa (order- or family-level) and the 11 spider families. Most (99%) spider-spider predation was on spider IGPrey, and ~90% of these interactions were restricted to spider families within the same broadly defined foraging mode (cursorial or web-spinning spiders). Bootstrapped-derived confidence intervals (BCI’s) for two indices of web structure, restricted connectance and interaction evenness, overlapped broadly across years and seasons. A third index, % IGPrey (% IGPrey among all prey of spiders), was similar across years (~50%) but varied seasonally, with a summer rate (65%) ~1.8x higher than spring and fall. This seasonal pattern was consistent across years. Our results suggest that extensive spider predation on spider IGPrey that exhibits consistent seasonal variation in frequency, and that occurs primarily within two broadly defined spider-spider interaction pathways, must be incorporated into models of the dynamics of forest-floor food webs.en_US
dc.identifier.citationWise, D. H., Mores, R. M., O, J. M. P.-D. L., & McCary, M. A. (2023). Pattern of seasonal variation in rates of predation between spider families is temporally stable in a food web with widespread intraguild predation. PLOS ONE, 18(10), e0293176. https://doi.org/10.1371/journal.pone.0293176en_US
dc.identifier.digitaljournal-pone-0293176en_US
dc.identifier.doihttps://doi.org/10.1371/journal.pone.0293176en_US
dc.identifier.urihttps://hdl.handle.net/1911/115559en_US
dc.language.isoengen_US
dc.publisherPublic Library of Scienceen_US
dc.rightsExcept where otherwise noted, this work is licensed under a Creative Commons Attribution (CC BY) license. Permission to reuse, publish, or reproduce the work beyond the terms of the license or beyond the bounds of fair use or other exemptions to copyright law must be obtained from the copyright holder.en_US
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/en_US
dc.titlePattern of seasonal variation in rates of predation between spider families is temporally stable in a food web with widespread intraguild predationen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
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