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dc.contributor.authorMacNeil, C
dc.contributor.authorBriffa, M
dc.date.accessioned2019-06-24T10:29:08Z
dc.date.available2019-06-24T10:29:08Z
dc.date.issued2019-07
dc.identifier.issn1146-609X
dc.identifier.issn1873-6238
dc.identifier.urihttp://hdl.handle.net/10026.1/14370
dc.description.abstract

Non-consumptive effects (NCEs)of predators – so called ‘fear’ responses – encompass costly antipredator behaviours, such as reduced feeding efficiency. NCEs can influence prey population dynamics and community structure, if prey are ‘keystone’ species such as Gammarus spp. amphipod ‘shrimps’. These freshwater macroinvertebrates have the ecosystem functional role of shredding fallen leaf litter, making it accessible to other taxa. Across Europe, the invasive predatory ‘killer shrimp’ Dikerogammarus villosus is replacing resident Gammarus spp., potentially threatening this vital ecosystem function. While predation (consumptive effects (CEs))of this invader has been well studied, for the first time we test whether NCEs can be evident in prey only exposed to D. villosus presence and whether this could potentially impact on the prey's functional role. In mesocosms, exposure to constrained D. villosus did not result in mortalities of any of three Gammarus prey species but the leaf shredding efficiencies of all prey were significantly reduced compared to a control treatment. This clear NCE has the potential to propagate through the ecological community via decreased energy processing. This study demonstrates the potential for fear of invasive predator presence alone to impact on ecosystem function.

dc.format.extent1-5
dc.languageen
dc.language.isoen
dc.publisherElsevier
dc.subjectConsumptive effect (CE)
dc.subjectDikerogammarus
dc.subjectKiller shrimp
dc.subjectNon-consumptive effect (NCE)
dc.subjectShredders
dc.titleFear alone reduces energy processing by resident ‘keystone’ prey threatened by an invader; a non-consumptive effect of ‘killer shrimp’ invasion of freshwater ecosystems is revealed
dc.typejournal-article
dc.typeArticle
plymouth.author-urlhttps://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000474318800001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=11bb513d99f797142bcfeffcc58ea008
plymouth.volume98
plymouth.publisher-urlhttp://dx.doi.org/10.1016/j.actao.2019.05.001
plymouth.publication-statusPublished
plymouth.journalActa Oecologica
dc.identifier.doi10.1016/j.actao.2019.05.001
plymouth.organisational-group/Plymouth
plymouth.organisational-group/Plymouth/Faculty of Health
plymouth.organisational-group/Plymouth/Faculty of Health/School of Psychology
plymouth.organisational-group/Plymouth/Faculty of Science and Engineering
plymouth.organisational-group/Plymouth/REF 2021 Researchers by UoA
plymouth.organisational-group/Plymouth/REF 2021 Researchers by UoA/UoA04 Psychology, Psychiatry and Neuroscience
plymouth.organisational-group/Plymouth/Research Groups
plymouth.organisational-group/Plymouth/Research Groups/Marine Institute
plymouth.organisational-group/Plymouth/Users by role
plymouth.organisational-group/Plymouth/Users by role/Academics
plymouth.organisational-group/Plymouth/Users by role/Researchers in ResearchFish submission
dcterms.dateAccepted2019-05-01
dc.rights.embargodate2020-5-9
dc.identifier.eissn1873-6238
dc.rights.embargoperiodNot known
rioxxterms.versionofrecord10.1016/j.actao.2019.05.001
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserved
rioxxterms.licenseref.startdate2019-07
rioxxterms.typeJournal Article/Review


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