FN Archimer Export Format
PT J
TI Connectivity between seamounts and coastal ecosystems in the Southwestern Indian Ocean
BT 
AF Crochelet, Estelle
   Barrier, Nicolas
   Andrello, Marco
   Marsac, Francis
   Spadone, Aurélie
   Lett, Christophe
AS 1:1,2;2:3,4;3:3,4;4:3,4;5:5;6:3,4;
FF 1:;2:;3:;4:;5:;6:;
C1 ARBRE - Agence de Recherche pour la Biodiversité à la Réunion, 34 avenue de la Grande Ourse, 97434, Saint-Gilles, La Réunion, France
   IRD / ESPACE-DEV (UMR 228), Parc Technologique Universitaire, 2 rue Joseph Wetzell, CS 41 095, 97495, Sainte Clotilde Cedex, La Réunion, France
   Institut de Recherche pour le Développement (IRD), Sète, France
   MARBEC, Univ Montpellier, CNRS, Ifremer, IRD, Sète, France
   IUCN – International Union for Conservation of Nature, Gland, Switzerland
C2 ARBRE, FRANCE
   IRD, FRANCE
   IRD, FRANCE
   IRD, FRANCE
   IUCN, SWITZERLAND
UM MARBEC
IN WOS Cotutelle UMR
   copubli-france
   copubli-int-hors-europe
IF 2.732
TC 17
UR https://archimer.ifremer.fr/doc/00613/72461/71423.pdf
LA English
DT Article
CR MAD-RIDGE-1
   MAD-RIDGE-2
BO Antea
DE ;Seamounts;Connectivity;Larval duration;Larval drift;Lagrangian modelling;Biophysical model;Surface drifters;Southwestern indian ocean;Ichthyop
AB Understanding larval connectivity patterns is critical for marine spatial planning, particularly for designing marine protected areas and managing fisheries. Patterns of larval dispersal and connectivity can be inferred from numerical transport models at large spatial and temporal scales. We assess model-based connectivity patterns between seamounts of the Southwestern Indian Ocean (SWIO) and the coastal ecosystems of Mauritius, La Réunion, Madagascar, Mozambique and South Africa, with emphasis on three shallow seamounts (La Pérouse [LP], MAD-Ridge [MR] and Walters Shoal [WS]). Using drifter trajectory and a Lagrangian model of ichthyoplankton dispersal, we show that larvae can undertake very long dispersion, with larval distances increasing with pelagic larval duration (PLD). There are three groups of greater connectivity: the region between the eastern coast of Madagascar, Mauritius and La Réunion islands; the seamounts of the South West Indian Ridge; and the pair formed by WS and a nearby un-named seamount. Connectivity between these three groups is evident only for the longest PLD examined (360 d). Connectivity from seamounts to coastal ecosystems is weak, with a maximum of 2% of larvae originating from seamounts reaching coastal ecosystems. Local retention at the three focal seamounts (LP, MR and WS) peaks at about 11% for the shortest PLD considered (15 d) at the most retentive seamount (WS) and decreases sharply with increasing PLD. Information on PLD and age of larvae collected at MR and LP are used to assess their putative origin. These larvae are likely self-recruits but it is also plausible that they immigrate from nearby coastal sites, i.e. the southern coast of Madagascar for MR and the islands of La Réunion and Mauritius for LP. 
PY 2020
PD JUL
SO Deep-sea Research Part Ii-topical Studies In Oceanography
SN 0967-0645
PU Elsevier BV
VL 176
UT 000556810400003
DI 10.1016/j.dsr2.2020.104774
ID 72461
ER

EF