RT Journal Article
SR Electronic
T1 Managing human mediated range shifts: understanding spatial, temporal and genetic variation in marine non-native species
JF bioRxiv
FD Cold Spring Harbor Laboratory
SP 2021.07.06.451303
DO 10.1101/2021.07.06.451303
A1 Luke E. Holman
A1 Shirley Parker-Nance
A1 Mark de Bruyn
A1 Simon Creer
A1 Gary Carvalho
A1 Marc Rius
YR 2021
UL http://biorxiv.org/content/early/2021/07/06/2021.07.06.451303.abstract
AB The use of molecular methods to manage natural resources is increasingly common. However, DNA-based methods are seldom used to understand the spatial and temporal dynamics of species’ range shifts. This is important when managing range-shifting species such as non-native species (NNS), which can have negative impacts on biotic communities. Here we investigated the range-shifting NNS Ciona robusta, Clavelina lepadiformis, Microcosmus squamiger and Styela plicata using a combined methodological approach. We first conducted non-molecular biodiversity surveys for these NSS along the South African coastline, and compared the results with historical surveys. We detected no consistent change in range size across species, with some displaying range stability and others showing range shifts. We then sequenced a section of cytochrome c oxidase subunit I (COI) from tissue samples and found genetic differences along the coastline but no change over recent times. Finally, we found that environmental DNA metabarcoding data showed broad congruence with both the non-molecular biodiversity and the COI datasets, but failed to capture complete incidence of all NSS. Overall, we demonstrated how a combined methodological approach can effectively detect spatial and temporal variation in genetic composition and range size, which is key for managing biodiversity changes of both threatened and NSS.Competing Interest StatementThe authors have declared no competing interest.