Ancient globetrotters—connectivity and putative native ranges of two cosmopolitan biofouling amphipods

The geographic distributions of some coastal marine species have appeared ascosmopolitan ever since they were first scientifically documented. In particular, for many benthic species that are associated with anthropogenic substrata, there is much mechanisms of dispersal. Here, we focused on two cong...

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Bibliographic Details
Published in:PeerJ
Main Authors: Beermann, Jan, Hall-mullen, Allison K., Havermans, Charlotte, Coolen, Joop W.P., Crooijmans, Richard P.M.A., Dibbits, Bert, Held, Christoph, Desiderato, Andrea
Format: Article in Journal/Newspaper
Language:English
Published: 2020
Subjects:
amphipoda
biofouling
biological invasion
cosmopolitan distribution
marine dispersal
marine shipping
Pacific
Jassa
Northwest Atlantic
Online Access:https://research.wur.nl/en/publications/ancient-globetrottersconnectivity-and-putative-native-ranges-of-t
https://doi.org/10.7717/peerj.9613
Description
Summary:The geographic distributions of some coastal marine species have appeared ascosmopolitan ever since they were first scientifically documented. In particular, for many benthic species that are associated with anthropogenic substrata, there is much mechanisms of dispersal. Here, we focused on two congeneric coastal crustaceans nearly all kinds of artificial hard substrata in temperate to warm seas. We hypothesized that shipping activities that started centuries ago. Mitochondrial DNA sequences of the CO1 fragment of specimens from distinct marine regions around the world were on putative native ranges of the two Jassa species. Populations of both species exhibited considerable genetic diversity with differing levels of geographic structure. For both species, at least two dominant haplotypes were shared among several geographic populations. Rapid demographic expansion and high migration rates between geographically distant regions support a scenario of ongoing dispersal all J. marmorata is the Northwest Atlantic, whereas the likely former native range of J. slatteryi is the Northern Pacific region. As corroborated by the genetic connectivity between populations, shipping still appears to be the more successful vector of the two species’ dispersal when compared to natural mechanisms. Historical invasion events that likely started centuries ago, along with current ongoing dispersal, confirmthese species’ identities as true “neocosmopolitans”.

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