FN Archimer Export Format
PT J
TI Variability in growth and tissue composition (CNP, natural isotopes) of the three morphotypes of holopelagic Sargassum
BT 
AF Changeux, Thomas
   Berline, Léo
   PODLEJSKI, Witold
   GUILLOT, Timothe
   STIGER-POUVREAU, Valerie
   Connan, Solene
   Thibaut, Thierry
AS 1:1;2:1;3:1;4:2;5:3;6:3;7:1;
FF 1:;2:;3:;4:PDG-RBE-BIODIVENV;5:;6:;7:;
C1 Mediterranean institute of oceanography (MIO); Postal address: Institut Méditerranéen d’Océanologie (MIO) - Equipe 5 EMBIO, Campus de Luminy, Case 901, Océanomed, Bât. Méditerranée 26M/102, 13288 Marseille Cédex 9, France
   Ifremer Martinique, 79 route de Pointe Fort 97231 Le Robert, France
   Univ Brest, CNRS, IRD, Ifremer, LEMAR, F-29280. Plouzane, France
C2 UNIV AIX MARSEILLE, FRANCE
   IFREMER, FRANCE
   UBO, FRANCE
SI MARTINIQUE
SE PDG-RBE-BIODIVENV
UM LEMAR
IN WOS Ifremer UPR
   WOS Cotutelle UMR
   copubli-france
   copubli-univ-france
IF 1.8
TC 2
UR https://archimer.ifremer.fr/doc/00829/94089/101182.pdf
LA English
DT Article
CR SARGASSES CARAIBES
   SARGASSES TRANSATLANTIQUE
BO Antea
DE ;Seaweed;Brown macroalgae;Sargasso;Carbon;Nitrogen;Phosphorus;Algal bloom;In-situ culture
AB Holopelagic Sargassum blooms in the tropical North Atlantic since 2011 are composed of two species, Sargassum natans and S. fluitans, and three morphotypes: S. natans VIII, S. natans I and S. fluitans III. The distinct morphology and the variations in space and time of the proportion of these three morphotypes suggest that they may have different physiology. For the first time, we have quantified the growth rates of these three morphotypes through in situ 9-day experiments on the coast of Martinique Island (French West Indies). Despite the non-optimal conditions for growth for these pelagic species and the short time of the experiment, we have observed that Sargassum fluitans III was growing faster (approximately twice as fast) than S. natans VIII and S. natans I. Sargassum natans I exhibited the slowest growth. The differences in tissue composition (CNP and CN natural isotopes) of morphotypes point to a greater benefit for S. fluitans III from the coastal localization of our experiment than for the two S. natans morphotypes, and suggest that S. natans I had achieved its last growth further offshore before our experiment. These contrasting growth performances are consistent with the dominance of S. fluitans III in recent observations in the Caribbean region and along the path from the Sargassum belt. This also makes this last morphotype the best candidate for cultivation. Making the distinction between the growth performances of morphotypes may improve the current predictive models about dispersal of these species. 
PY 2023
PD JUN
SO Aquatic Botany
SN 0304-3770
PU Elsevier
VL 187
UT 001054686000001
DI 10.1016/j.aquabot.2023.103644
ID 94089
ER

EF