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dc.contributorAlan Wilson, aew0009@auburn.eduen_US
dc.creatorSarnelle, Orlando
dc.creatorWilson, Alan E.
dc.date.accessioned2019-10-31T18:29:26Z
dc.date.available2019-10-31T18:29:26Z
dc.date.created2008
dc.identifierhttps://doi.org/10.1890/07-0935.1en_US
dc.identifier.urihttps://esajournals.onlinelibrary.wiley.com/doi/full/10.1890/07-0935.1en_US
dc.identifier.urihttp://hdl.handle.net/11200/49627
dc.description.abstractThe functional response of Daphnia, a common pelagic herbivore in lakes, was assessed with a combination of secondary and meta-analyses of published data and new data from an experiment conducted using very low food levels. Secondary analyses of literature data (28 studies, n = 239-393) revealed a significant positive influence of food concentration on Daphnia clearance rate at low food levels, i.e., evidence of an overall Type III functional response. This result was not an artifact of including data from Daphnia that were exhausted from prolonged food deprivation (more than three hours at very low food). Meta-analysis of Daphnia clearance rate vs. food concentration across a range of low food concentrations (eight studies) showed a significantly positive slope across studies, which also supports the presence of a Type III response. Congruent with these analyses of published data, the feeding experiment showed clear evidence of a Type III functional response for D. pulicaria feeding on Ankistrodesmus falcatus. Food levels at which Daphnia clearance rate declined with decreasing food were near the minimum resource requirement for Daphnia population maintenance at steady state (R*). We suggest that Type III responses are more common than previously believed, perhaps because of the relative paucity of observations at low food levels, and that reduced prey mortality at low phytoplankton densities could be a stabilizing mechanism for Daphnia-phytoplankton systems under resource scarcity.en_US
dc.formatPDFen_US
dc.relation.ispartofEcologyen_US
dc.relation.ispartofseries1939-9170en_US
dc.rights© 2008. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/en_US
dc.subjectDaphnia feedingen_US
dc.subjectfunctional responseen_US
dc.subjectphytoplanktonen_US
dc.subjectpopulation dynamicsen_US
dc.subjectpopulation stabilityen_US
dc.subjectpredator-preyen_US
dc.titleType III functional response in Daphniaen_US
dc.typeCollectionen_US
dc.type.genreJournal Article, Academic Journalen_US
dc.citation.volume89en_US
dc.citation.issue6en_US
dc.citation.spage1723en_US
dc.citation.epage1732en_US
dc.description.statusPublisheden_US
dc.description.peerreviewYesen_US
dc.creator.orcidhttps://orcid.org/0000-0003-1080-0354en_US


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