FN Archimer Export Format PT J TI From seascape ecology to population genomics and back. Spatial and ecological differentiation among cryptic species of the red algae Lithophyllum stictiforme/L. cabiochiae, main bioconstructors of coralligenous habitats BT AF De Jode, Aurélien David, Romain Haguenauer, Anne Cahill, Abigail E. Erga, Zinovia Guillemain, Dorian Sartoretto, Stephane Rocher, Caroline Selva, Marjorie Le Gall, Line Féral, Jean-Pierre Chenuil, Anne AS 1:1;2:1;3:1,2;4:1,3;5:1;6:1,4;7:5;8:1;9:1;10:6;11:1;12:1; FF 1:;2:;3:;4:;5:;6:;7:PDG-ODE-LITTORAL-LERPAC;8:;9:;10:;11:;12:; C1 Aix Marseille Univ, Univ Avignon, CNRS, IRD, IMBE, Marseille, France EPHE PSL Research University, USR 3278 CRIOBE CNRS-UPVD, BP 1013, Moorea, 98729, French Polynesia Biology Department, Albion College, Michigan 49224, USA Institut Pythéas: Observatoire des Sciences de l'Univers IFREMER, Zone Portuaire de Brégaillon, 83500 La Seyne-sur-mer, France Institut Systématique Evolution Biodiversité (ISYEB), Muséum national d’Histoire naturelle, CNRS, Sorbonne Université, EPHE, 57 rue Cuvier, CP 39, 75005 Paris, France C2 UNIV AIX MARSEILLE, FRANCE EPHE, FRANCE COLL ALBION, USA UNIV AIX MARSEILLE, FRANCE IFREMER, FRANCE MNHN, FRANCE SI TOULON SE PDG-ODE-LITTORAL-LERPAC IN WOS Ifremer UPR copubli-france copubli-univ-france copubli-int-hors-europe IF 3.496 TC 24 UR https://archimer.ifremer.fr/doc/00487/59859/63014.pdf LA English DT Article DE ;Engineering species;Cryptic species;Ecological niche;Coralligenous habitats;Ecological differentiation;Crustose Coralline Algae AB Ecosystem engineering species alter the physical structure of their environment and can create or modify habitats, having a massive impact on local biodiversity. Coralligenous reefs are highly diverse habitats endemic to the Mediterranean Sea built by calcareous benthic organisms among which Crustose Coralline Algae are the main engineering species. We analyzed the diversity of Lithophyllum stictiforme or L. cabiochiae in coralligenous habitats combining a multiple barcode and a population genomics approach with seascape features. Population genomics allowed disentangling pure spatial effects from environmental effects. We found that these taxa form a complex of eight highly divergent cryptic species that are easily identifiable using classic barcode markers (psbA, LSU, COI). Three factors have a significant effect on the relative abundances of these cryptic species: the location along the French Mediterranean coast, depth and Photosynthetic Active Radiation (PAR). The analysis of around 5000 SNPs for the most abundant species revealed genetic differentiation among localities in the Bay of Marseille but no differentiation between depths within locality. Thus, the effect of depth and PAR on cryptic species communities is not a consequence of restricted connectivity but rather due to differential settlement or survival among cryptic species. This differential is more likely driven by irradiance levels rather than by pressure or temperature. Both the genetic and species diversity patterns are congruent with the main patterns of currents in the Bay. Ecological differentiation among these engineering cryptic species, sensitive to ocean warming and acidification, could have important consequences on the diversity and structure of the coralligenous communities. PY 2019 PD AUG SO Molecular Phylogenetics And Evolution SN 1055-7903 PU Elsevier BV VL 137 UT 000472499000009 BP 104 EP 113 DI 10.1016/j.ympev.2019.04.005 ID 59859 ER EF