Entangled fates of holobiont genomes during invasion: nested bacterial and host diversities in Caulerpa taxifolia
|Author(s)||Arnaud-Haond Sophie1, 2, 3, Aires Tania3, Candeias R.3, Teixeira S. J. L.3, Duarte C. M.4, Valero M.5, Serrao E. A.3|
|Affiliation(s)||1 : IFREMER, Stn Sete, UMR MARBEC, CS 30171, Ave Jean Monnet, F-34203 Sete, France.
2 : Univ Montpellier, Stn Marine, OREME, CC 99009, 2 Rue Chantiers, F-34200 Sete, France.
3 : Univ Algarve, MAREE, CIMAR, CCMAR, Campus Gambelas, P-8005139 Faro, Portugal.
4 : King Abdullah Univ Sci & Technol, RSRC, Bldg 2,Level 3,Room 3219, Thuwal 239556900, Saudi Arabia.
5 : Sorbonne Univ, Stn Biol Roscoff, Evolutionary Biol & Ecol Algae, UMI EBEA 3614,CNRS,UPMC,PUCCh,UACH,CS 90074, Pl Georges Teissier, F-29688 Roscoff, France.
|Source||Molecular Ecology (0962-1083) (Wiley), 2017-04 , Vol. 26 , N. 8 , P. 2379-2391|
|WOS© Times Cited||24|
|Keyword(s)||Caulerpa, clonal diversity, endophytic communities, holobiont, invasion paradox, marine invasion|
|Abstract||Successful prevention and mitigation of biological invasions requires retracing the initial steps of introduction, as well as understanding key elements enhancing the adaptability of invasive species. We studied the genetic diversity of the green alga Caulerpa taxifolia and its associated bacterial communities in several areas around the world. The striking congruence of α and ß diversity of the algal genome and endophytic communities reveals a tight association, supporting the holobiont concept as best describing the unit of spreading and invasion. Both genomic compartments support the hypotheses of a unique accidental introduction in the Mediterranean and of multiple invasion events in Southern Australia. In addition to helping with tracing the origin of invasion, bacterial communities exhibit metabolic functions that can potentially enhance adaptability and competitiveness of the consortium they form with their host. We thus hypothesize that low genetic diversities of both host and symbiont communities may contribute to the recent regression in the Mediterranean, in contrast with the persistence of highly diverse assemblages in southern Australia. This study supports the importance of scaling up from the host to the holobiont for a comprehensive understanding of invasions.|