Näytä suppeat kuvailutiedot

dc.contributor.authorCollins, Sarah M.
dc.contributor.authorThomas, Steven A.
dc.contributor.authorHeatherly, Thomas
dc.contributor.authorMacNeill, Keeley L.
dc.contributor.authorLeduc, Antoine O. H. C.
dc.contributor.authorLopez Sepulcre, Andres
dc.contributor.authorLamphere, Bradley A.
dc.contributor.authorEl-Sabaawi, Rana W.
dc.contributor.authorReznick, David N.
dc.contributor.authorPringle, Catherine M.
dc.contributor.authorFlecker, Alexander S.
dc.date.accessioned2016-11-04T11:09:15Z
dc.date.available2016-11-04T11:09:15Z
dc.date.issued2016
dc.identifier.citationCollins, S. M., Thomas, S. A., Heatherly, T., MacNeill, K. L., Leduc, A. O. H. C., Lopez Sepulcre, A., Lamphere, B. A., El-Sabaawi, R. W., Reznick, D. N., Pringle, C. M., & Flecker, A. S. (2016). Fish introductions and light modulate food web fluxes in tropical streams : a whole-ecosystem experimental approach. <i>Ecology</i>, <i>97</i>(11), 3154-3166. <a href="https://doi.org/10.1002/ecy.1530" target="_blank">https://doi.org/10.1002/ecy.1530</a>
dc.identifier.otherCONVID_26300500
dc.identifier.urihttps://jyx.jyu.fi/handle/123456789/51824
dc.description.abstractDecades of ecological study have demonstrated the importance of top-down and bottom-up controls on food webs, yet few studies within this context have quantified the magnitude of energy and material fluxes at the whole-ecosystem scale. We examined top-down and bottom-up effects on food web fluxes using a field experiment that manipulated the presence of a consumer, the Trinidadian guppy Poecilia reticulata, and the production of basal resources by thinning the riparian forest canopy to increase incident light. To gauge the effects of these reach-scale manipulations on food web fluxes, we used a nitrogen (15N) stable isotope tracer to compare basal resource treatments (thinned canopy vs. control) and consumer treatments (guppy introduction vs. control). The thinned canopy stream had higher primary production than the natural canopy control, leading to increased N fluxes to invertebrates that feed on benthic biofilms (grazers), fine benthic organic matter (collector-gatherers), and organic particles suspended in the water column (filter feeders). Stream reaches with guppies also had higher primary productivity and higher N fluxes to grazers and filter feeders. In contrast, N fluxes to collector-gatherers were reduced in guppy introduction reaches relative to upstream controls. N fluxes to leaf-shredding invertebrates, predatory invertebrates, and the other fish species present (Hart’s killifish, Anablepsoides hartii) did not differ across light or guppy treatments, suggesting that effects on detritus-based linkages and upper trophic levels were not as strong. Effect sizes of guppy and canopy treatments on N flux rates were similar for most taxa, though guppy effects were the strongest for filter feeding invertebrates while canopy effects were the strongest for collector-gatherer invertebrates. Combined, these results extend previous knowledge about top-down and bottom-up controls on ecosystems by providing experimental, reach-scale evidence that both pathways can act simultaneously and have equally strong influence on nutrient fluxes from inorganic pools through primary consumers.
dc.language.isoeng
dc.publisherEcological Society of America
dc.relation.ispartofseriesEcology
dc.subject.othernitrogen flux
dc.subject.otherreach-scale experiment
dc.subject.otherstable isotope tracers
dc.subject.otherstream food web
dc.subject.othertop-down and bottom-up effects
dc.subject.othertrophic linkages
dc.subject.otherbenthic macroinvertebrates
dc.subject.otherTrinidad guppy
dc.subject.otherNeotropics
dc.subject.other15N
dc.titleFish introductions and light modulate food web fluxes in tropical streams : a whole-ecosystem experimental approach
dc.typeresearch article
dc.identifier.urnURN:NBN:fi:jyu-201611044565
dc.contributor.laitosBio- ja ympäristötieteiden laitosfi
dc.contributor.laitosDepartment of Biological and Environmental Scienceen
dc.contributor.oppiaineEkologia ja evoluutiobiologiafi
dc.contributor.oppiaineEcology and Evolutionary Biologyen
dc.type.urihttp://purl.org/eprint/type/JournalArticle
dc.date.updated2016-11-04T07:15:04Z
dc.type.coarhttp://purl.org/coar/resource_type/c_2df8fbb1
dc.description.reviewstatuspeerReviewed
dc.format.pagerange3154-3166
dc.relation.issn0012-9658
dc.relation.numberinseries11
dc.relation.volume97
dc.type.versionpublishedVersion
dc.rights.copyright© 2016 by the Ecological Society of America. Published in this repository with the kind permission of the publisher.
dc.rights.accesslevelopenAccessfi
dc.type.publicationarticle
dc.subject.ysoalkutuotanto
jyx.subject.urihttp://www.yso.fi/onto/yso/p5883
dc.relation.doi10.1002/ecy.1530
dc.type.okmA1


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Näytä suppeat kuvailutiedot