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Is Dikerogammarus villosus (Crustacea, Gammaridae) a 'killer shrimp' in the River Rhine system?

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dc.contributor.authorKoester, Meike
dc.contributor.authorBayer, Bastian
dc.contributor.authorGergs, René
dc.contributor.authorSahm, René
dc.date.accessioned2024-06-16T15:42:29Z
dc.date.available2024-06-16T15:42:29Z
dc.date.issued2016
dc.description.abstractCommunities and food web structures of aquatic ecosystems can be strongly affected by the establishment of alien macroinvertebrate species. In many European waters, the invasion of the Ponto-Caspian amphipod Dikerogammarus villosus has led to displacement of other macroinvertebrates. Predation by D. villosus is often assumed to be the key driver of the displacement based on results of laboratory studies, but this has not been verified in the field. Here, we report our investigation of the relevance of D. villosus predation in the River Rhine system using both stable isotope analyses of d13C and d15N, and molecular analyses of D. villosus gut contents with group-specific primers aiming at macroinvertebrate prey taxa. Stable isotope analyses of D. villosus from ten sites showed mean d15N values comparable to those of primary consumers. Overall, only approximately 1% of all tested primer/gut content combinations revealed DNA of the respective taxa. Both indicate minor importance of predation by D. villosus as a driver of the observed macroinvertebrate displacement. Conceivably, competitive strength due to opportunistic feeding, indicated by different niche widths between and a strong intraspecific variation of d13C values of D. villosus within sites of our study, is much more important for its invasion success. Quelle: http://link.springer.comen
dc.format.extent1 Onlineressource (Seite 299-313)
dc.format.extent723,88 KB
dc.format.mediumonline resource
dc.identifier.doihttps://doi.org/10.60810/openumwelt-517
dc.identifier.urihttps://openumwelt.de/handle/123456789/7113
dc.language.isoeng
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/
dc.titleIs Dikerogammarus villosus (Crustacea, Gammaridae) a 'killer shrimp' in the River Rhine system?
dc.typeWissenschaftlicher Artikel
dc.type.dcmitext
dc.type.mediumcomputer
dspace.entity.typePublication
local.bibliographicCitation.journalTitleHydrobiologia
local.bibliographicCitation.volume768 (2016), Heft 1
local.collectionAufsätze
local.contributor.authorId02175788
local.contributor.authorId02175789
local.identifier.catalogId02441789
local.ingest.leader04717naa a2200000uu 4500
local.jointTitleIS DIKEROGAMMARUS VILLOSUS CRUSTACEA GAMMARIDAE A KILLER SHRIMP IN THE RIVER RHINE SYSTEM
local.sourcecatalog
local.source.urihttp://link.springer.com/article/10.1007/s10750-015-2558-9
local.staffPublicationtrue
relation.isAuthorOfPublicationa82309fd-e6b1-4700-936d-12c0272b466a
relation.isAuthorOfPublication.latestForDiscoverya82309fd-e6b1-4700-936d-12c0272b466a
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