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Trophic basis of production of stream detritivores shifts with reduced forest inputs

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dc.contributor.authorEggert, Susan L.en
dc.contributor.authorWallace, J. Bruceen
dc.contributor.authorMeyer, Judy L.en
dc.contributor.authorWebster, Jackson R.en
dc.contributor.departmentBiological Sciencesen
dc.date.accessioned2021-03-16T12:13:39Zen
dc.date.available2021-03-16T12:13:39Zen
dc.date.issued2020-08en
dc.description.abstractEstimating changes in organic matter flow from resource to consumer using trophic basis of production (TBP) is a way to examine resource limitation effects on ecosystem function. We examined diet shifts and production of insect detritivores to assess changes with reduced detrital inputs to a forested headwater stream. Organic matter was excluded for 7 years using a canopy net. Small and large wood were removed from the stream after the 3rd and 5th year, respectively. Detritivore production declined after 3 years of litter exclusion. After wood removal, production of detritivores declined again. Steepest declines in Pycnopsyche gentilis production occurred within year 1. Tipula spp. and Tallaperla spp. production declined after wood removal. Diets shifted from leaves to wood to fine particulate organic matter (FPOM) for Tipula spp. and Tallaperla spp., but not for P. gentilis. Resource flows to detritivores shifted in the exclusion stream from leaves to wood to FPOM after leaf standing crops declined and wood removal. Small wood was an important food resource. TBP results showed shifts in food resource use by two detritivores with terrestrial input reduction. These findings suggest that maintaining diverse riparian inputs of organic matter is important for detritivore productivity in forested headwater watersheds.en
dc.description.adminPublic domain – authored by a U.S. government employeeen
dc.description.notesWe thank the technicians and students that assisted with this study. Special thanks to C. Wallace for digitizing many insect gut contents. S. Golladay, A. Rosemond, D. Batzer, M. Moretti, and two anonymous reviewers provided helpful comments that improved this paper. W. Swank, J. Vose, and B. Kloeppel at Coweeta Hydrologic Laboratory provided site support. The National Science Foundation (Grants DEB-9207498, DEB-9629268, and DEB-0212315) funded this research.en
dc.description.sponsorshipNational Science FoundationNational Science Foundation (NSF) [DEB-9207498, DEB-9629268, DEB-0212315]en
dc.format.mimetypeapplication/pdfen
dc.identifier.doihttps://doi.org/10.1007/s10750-020-04317-8en
dc.identifier.eissn1573-5117en
dc.identifier.issn0018-8158en
dc.identifier.issue14en
dc.identifier.urihttp://hdl.handle.net/10919/102726en
dc.identifier.volume847en
dc.language.isoenen
dc.rightsPublic Domainen
dc.rights.urihttp://creativecommons.org/publicdomain/mark/1.0/en
dc.subjectOrganic matteren
dc.subjectDetritusen
dc.subjectGut contentsen
dc.subjectFreshwater invertebrateen
dc.subjectRiparianen
dc.subjectFlow food weben
dc.titleTrophic basis of production of stream detritivores shifts with reduced forest inputsen
dc.title.serialHydrobiologiaen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten
dc.type.dcmitypeStillImageen

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