FN Archimer Export Format
PT J
TI Vertical distribution of brittle star larvae in two contrasting coastal embayments: implications for larval transport
BT 
AF Guillam, Morgane
   Bessin, Claire
   Blanchet-Aurigny, Aline
   Cugier, Philippe
   Nicolle, Amandine
   Thiébaut, Éric
   Comtet, Thierry
AS 1:1;2:1;3:2;4:2;5:1,3;6:1;7:1;
FF 1:;2:;3:;4:PDG-ODE-DYNECO-LEBCO;5:;6:;7:;
C1 Sorbonne Université, CNRS, Station Biologique de Roscoff, Laboratoire Adaptation Et Diversité en Milieu Marin, ADMM, CS90074, 29688, Roscoff Cedex, France
   Ifremer, Centre de Bretagne, Département Dynamiques des Ecosystèmes Côtiers (DYNECO), Laboratoire d’Ecologie Benthique Côtière (LEBCO), Technopole Brest Iroise, CS 10070, 29280, Plouzané, France
   ENSTA Bretagne, Pôle STIC/OSM, 2 rue François Verny, 29806, Brest Cedex 9, France
C2 UNIV SORBONNE, FRANCE
   IFREMER, FRANCE
   ENSTA BRETAGNE, FRANCE
SI BREST
SE PDG-ODE-DYNECO-LEBCO
IN WOS Ifremer UPR
   DOAJ
   copubli-france
   copubli-univ-france
IF 4.379
TC 9
UR https://archimer.ifremer.fr/doc/00641/75321/75846.pdf
   https://archimer.ifremer.fr/doc/00641/75321/75847.pdf
LA English
DT Article
BO Neomysis
AB The ability of marine invertebrate larvae to control their vertical position shapes their dispersal pattern. In species characterized by large variations in population density, like many echinoderm species, larval dispersal may contribute to outbreak and die-off phenomena. A proliferation of the ophiuroid Ophiocomina nigra was observed for several years in western Brittany (France), inducing drastic changes on the benthic communities. We here studied the larval vertical distribution in this species and two co-occurring ophiuroid species, Ophiothrix fragilis and Amphiura filiformis, in two contrasting hydrodynamic environments: stratified in the bay of Douarnenez and well-mixed in the bay of Brest. Larvae were collected at 3 depths during 25 h within each bay. In the bay of Brest, all larvae were evenly distributed in the water column due to the intense vertical mixing. Conversely, in the bay of Douarnenez, a diel vertical migration was observed for O. nigra, with a night ascent of young larvae, and ontogenetic differences. These different patterns in the two bays mediate the effects of tidal currents on larval fluxes. O. fragilis larvae were mainly distributed above the thermocline which may favour larval retention within the bay, while A. filiformis larvae, mostly concentrated near the bottom, were preferentially exported. This study highlighted the complex interactions between coastal hydrodynamics and specific larval traits, e.g. larval morphology, in the control of larval vertical distribution and larval dispersal. 
PY 2020
PD JUN
SO Scientific Reports
SN 2045-2322
PU Springer Science and Business Media LLC
VL 10
IS 1
UT 000555518700004
DI 10.1038/s41598-020-68750-4
ID 75321
ER

EF