Hierarchical structuring of genetic variation at differing geographic scales in the cultivated sugar kelp Saccharina latissima

Karen Mooney, Gemma Beatty, Bjorn Elsäßer, Emily Follis, Louise Kregting, Nessa O'Connor, Gillian Riddell, James Provan

Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

9 Dyfyniadau (Scopus)
140 Wedi eu Llwytho i Lawr (Pure)

Crynodeb

The cultivation of macroalgae for biofuels, food and fertilisers has increased dramatically in recent years. The demand for such algal-derived products means that large scale cultivation in coastal waters will become necessary to provide sufficient algal biomass. As part of the process of establishing new macroalgal farms, the potential for gene flow between cultivated specimens and natural populations needs to be taken into consideration. Consequently, in the present study we have used a combined population genetic and hydrodynamic modelling
approach to determine potential levels and patterns of gene flow in the kelp Saccharina latissima. Microsatellite analysis of 14 populations sampled across the northern part of the Irish Sea indicated four distinct genetic clusters. These were consistent with dispersal patterns indicated by the particle tracking model and show a combination of isolation by distance and genetic structuring due to local hydrodynamic conditions. At smaller scales (less than a few 10s of km), gene flow appears to be fairly extensive, with evidence of local population connectivity due to local currents. At larger scales, however, factors such as
freshwater efflux and open water would appear to represent barriers to gene flow. Together, these patterns suggest that factors other than simple geographical distance and proximity need to be taken into account when planning the siting of kelp farms with the aim of minimizing gene flow to and from natural populations
Iaith wreiddiolSaesneg
Tudalennau (o-i)108-115
Nifer y tudalennau8
CyfnodolynMarine Environmental Research
Cyfrol142
Dyddiad ar-lein cynnar02 Hyd 2018
Dynodwyr Gwrthrych Digidol (DOIs)
StatwsCyhoeddwyd - 01 Tach 2018

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