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dc.contributor.authorVesterinen, Jussi
dc.contributor.authorSyväranta, Jari
dc.contributor.authorDevlin, Shawn
dc.contributor.authorJones, Roger
dc.date.accessioned2016-11-18T07:48:22Z
dc.date.available2017-07-28T21:45:06Z
dc.date.issued2016
dc.identifier.citationVesterinen, J., Syväranta, J., Devlin, S., & Jones, R. (2016). Periphyton support for littoral secondary production in a highly humic boreal lake. <i>Freshwater Science</i>, <i>35</i>(4), 1235-1247. <a href="https://doi.org/10.1086/689032" target="_blank">https://doi.org/10.1086/689032</a>
dc.identifier.otherCONVID_26245543
dc.identifier.otherTUTKAID_71340
dc.identifier.urihttps://jyx.jyu.fi/handle/123456789/51913
dc.description.abstractSteep stratification and poor light penetration in highly humic lakes typically restrict oxygenated littoral areas to narrow lake margins. However, in some instances, surrounding floating vegetation mats can sustain highly productive periphyton and more diverse invertebrate communities than pelagic areas. Little is known about how these littoral food webs function or the extent to which the pelagic and littoral food webs are coupled. We added 15N-labeled ammonium nitrate to the floating moss mat surrounding the littoral zone of Mekkojärvi, a small highly humic and fishless lake in southern Finland. Our goal was to increase the δ15N values of periphyton to investigate the diets of littoral invertebrates and possible pelagic–littoral coupling in the lake. We divided the lake in 2 with a plastic curtain and added European Perch (Perca fluviatilis) to 1 basin while the other remained fishless. δ15N of periphyton and most littoral invertebrates increased well above the natural abundance levels. δ15N of pelagic Daphnia generally did not increase, except for a sudden and transitory increase in the basin where fish were introduced. Only one perch of the 33 recaptured following their introduction showed clearly increased δ15N. The lowest δ13C values were found in pelagic invertebrates. Most littoral invertebrates had values closer to those of periphyton, which clearly contributed significantly to the diets of most littoral invertebrate groups and was an important basal resource in the littoral food web. Chironomids and ephemeropterans had surprisingly low δ13C values, which may reflect inclusion in their diets of highly 13C-depleted methane-oxidizing bacteria, which were known to contribute to the diets of Daphnia in the lake. Our results indicate that the pelagic and littoral habitats are not strongly coupled in the absence of fish but that zooplanktivorous fish may increase coupling by driving zooplankton into the littoral zone to seek refuge from predation.
dc.language.isoeng
dc.publisherSociety for Freshwater Science ; University of Chicago Press
dc.relation.ispartofseriesFreshwater Science
dc.subject.otherlittoral invertebrates
dc.subject.otherbenthic algae
dc.subject.othermethane-oxidizing bacteria
dc.subject.otherstable-isotope analysis
dc.subject.otherisotope additions
dc.titlePeriphyton support for littoral secondary production in a highly humic boreal lake
dc.typearticle
dc.identifier.urnURN:NBN:fi:jyu-201611174650
dc.contributor.laitosBio- ja ympäristötieteiden laitosfi
dc.contributor.laitosDepartment of Biological and Environmental Scienceen
dc.contributor.oppiaineAkvaattiset tieteetfi
dc.contributor.oppiaineAquatic Sciencesen
dc.type.urihttp://purl.org/eprint/type/JournalArticle
dc.date.updated2016-11-17T16:15:09Z
dc.type.coarjournal article
dc.description.reviewstatuspeerReviewed
dc.format.pagerange1235-1247
dc.relation.issn2161-9549
dc.relation.numberinseries4
dc.relation.volume35
dc.type.versionpublishedVersion
dc.rights.copyright© 2016 by The Society for Freshwater Science. Published in this repository with the kind permission of the publisher.
dc.rights.accesslevelopenAccessfi
dc.relation.doi10.1086/689032


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