FN Archimer Export Format PT J TI Highly restricted dispersal in habitat-forming seaweed may impede natural recovery of disturbed populations BT AF RIQUET, Florentine DE KUYPER, Christiane-Arnilda FAUVELOT, Cecile AIROLDI, Laura PLANES, Serge FRASCHETTI, Simonetta MACIC, Vesna MILCHAKOVA, Nataliya MANGIALAJO, Luisa BOTTIN, Lorraine AS 1:1,2;2:3;3:1,2;4:4,5;5:6;6:7,9;7:8,10;8:11;9:3;10:3; FF 1:;2:;3:;4:;5:;6:;7:;8:;9:;10:; C1 Inst Rech Dev IRD, UMR ENTROPIE, Noumea, New Caledonia. Sorbonne Univ, CNRS, UMR LOV, Villefranche Sur Mer, France. Univ Cote dAzur, CNRS, UMR 7035 ECOSEAS, Nice, France. Univ Padua, Chioggia Hydrobiol Stn Umberto DAncona, Dept Biol, Chioggia, Italy. Univ Bologna, Dept Biol Geol & Environm Sci, UO CoNISMa, Ravenna, Italy. Univ Perpignan, PSL Res Univ, EPHE UPVD CNRS, USR 3278 CRIOBE, Perpignan, France. Univ Naples Federico II, Dept Biol, Naples, Italy. Staz Zoolog Anton Dohrn, Naples, Italy. CoNISMa, Rome, Italy. Univ Crne Gore, Inst Biol Mora, Kotor, Montenegro. Kovalevsky Inst Biol Southern Seas RAS IBSS, Labo Phytoresources, Sevastopol, Russia. C2 IRD, FRANCE UNIV PARIS 06, FRANCE UNIV NICE, FRANCE UNIV PADUA, ITALY UNIV BOLOGNA, ITALY UNIV PERPIGNAN, FRANCE UNIV NAPLES FEDERICO II, ITALY STAZ ZOOLOG ANTON DOHRN, ITALY CONISMA, ITALY UNIV CRNE GORE, MONTENEGRO RUSSIAN ACAD SCI, RUSSIA UM ENTROPIE IN WOS Cotutelle UMR DOAJ copubli-france copubli-europe copubli-univ-france copubli-int-hors-europe copubli-sud IF 4.997 TC 6 UR https://archimer.ifremer.fr/doc/00797/90922/96593.pdf https://archimer.ifremer.fr/doc/00797/90922/96594.docx LA English DT Article AB Cystoseira sensu lato (Class Phaeophyceae, Order Fucales, Family Sargassaceae) forests play a central role in marine Mediterranean ecosystems. Over the last decades, Cystoseira s.l. suffered from a severe loss as a result of multiple anthropogenic stressors. In particular, Gongolaria barbata has faced multiple human-induced threats, and, despite its ecological importance in structuring rocky communities and hosting a large number of species, the natural recovery of G. barbata depleted populations is uncertain. Here, we used nine microsatellite loci specifically developed for G. barbata to assess the genetic diversity of this species and its genetic connectivity among fifteen sites located in the Ionian, the Adriatic and the Black Seas. In line with strong and significant heterozygosity deficiencies across loci, likely explained by Wahlund effect, high genetic structure was observed among the three seas (ENA corrected F-ST = 0.355, IC = [0.283, 0.440]), with an estimated dispersal distance per generation smaller than 600 m, both in the Adriatic and Black Sea. This strong genetic structure likely results from restricted gene flow driven by geographic distances and limited dispersal abilities, along with genetic drift within isolated populations. The presence of genetically disconnected populations at small spatial scales (< 10 km) has important implications for the identification of relevant conservation and management measures for G. barbata: each population should be considered as separated evolutionary units with dedicated conservation efforts. PY 2021 PD AUG SO Scientific Reports SN 2045-2322 PU Nature Portfolio VL 11 IS 1 UT 000686708000019 DI 10.1038/s41598-021-96027-x ID 90922 ER EF