FN Archimer Export Format
PT J
TI Live (stained) benthic foraminifera from the West-Gironde Mud Patch (Bay of Biscay, NE Atlantic): Assessing the reliability of bio-indicators in a complex shelf sedimentary unit.
BT 
AF Fontanier, Christophe
   Deflandre, B.
   Rigaud, S.
   Mamo, B.
   Dubosq, N.
   Lamarque, B.
   LANGLET, Dewi
   Schmidt, S.
   Lebleu, P.
   Poirier, D.
   Cordier, M.A.
   Grémare, A.
AS 1:1,2,3;2:1;3:4;4:5;5:1;6:1;7:6;8:1;9:1;10:1;11:1;12:1;
FF 1:;2:;3:;4:;5:;6:;7:;8:;9:;10:;11:;12:;
C1 Université de Bordeaux, UMR CNRS 5805 EPOC – OASU, Allée Geoffroy Saint-Hilaire,CS 50023, F-33615, Pessac, France
   FORAM, Study Group, 9 rue des Fauvettes, F-49125, Tiercé, France
   Université d’Angers, 4 boulevard Lavoisier, F-49000, Angers, France
   Université de Nîmes, EA 7352 CHROME, rue du Dr Georges Salan, F-30021 Nîmes, France
   Department of Biology, Macquarie University, North Ryde, NSW, 2109, Australia
   Evolution, Cell Biology and Symbiosis Unit, Okinawa Institute of Science and Technology Graduate University, 1919-1 Tancha, Onna-son, Kunigami-gun, 904-0495, Japan
C2 UNIV BORDEAUX, FRANCE
   FORAM, FRANCE
   UNIV ANGERS, FRANCE
   UNIV NIMES, FRANCE
   UNIV MACQUARIE, AUSTRALIA
   OKINAWA INST SCI TECH OIST, JAPAN
TC 4
UR https://archimer.ifremer.fr/doc/00739/85137/90108.pdf
LA English
DT Article
CR JERICOBENT
   JERICOBENT-2
BO Côtes De La Manche
DE ;Benthic foraminifera;West-Gironde Mud Patch;Diversity;Organic matter;Sedimentary environment
AB Live (Rose Bengal stained) shelf foraminiferal faunas have been studied at seven stations located along a shore-open ocean transect between 39 and 69-m depth in the West-Gironde Mud Patch (WGMP) (Bay of Biscay, NE Atlantic) to understand how complex environmental conditions (e.g., organic matter, oxygenation, sedimentary facies) control their ecological patterns (i.e., diversity, faunal composition, standing stock, and microhabitats). To do so, the WGMP was sampled in August 2017, at the end of the succession of phytoplankton blooms occurring in spring and summer. This morpho-sedimentary unit is bathed by well-oxygenated bottom waters and characterized by clay-silt facies containing variably degraded phytodetritus and traces of terrestrial organic matter. Oxygen penetration depth within the sediment is less than 7 ± 3 mm, indicating efficient organic matter in-sediment mineralization by aerobic respiration. Foraminiferal richness (S) presents relatively moderate values ranging between 15 and 35 taxa. According to Shannon Index H’, foraminiferal diversity tends to increase with water depth. Accordingly, the relative contribution of Eggerelloides scaber, the dominant foraminiferal species at all stations, decreases with increased depth and decreased proximity to the coast. The shallowest station (Station 1, 39 m), closest to the shore, is characterised by E. scaber, Quinqueloculina laevigata and Ammonia beccarii, species typical of inner-shelf environments constrained by high-energy hydrodynamics and river discharge. Surficial sediments at Station 1 constitute of winnowed sands depleted in organic carbon. Towards the centre of the WGMP, where clay-silt facies contain variably degraded marine phytodetritus and terrestrial organic compounds, foraminiferal faunas are characterized by Bulimina aculeata, Ammonia falsobeccarrii, Nouria polymorphinoides and Nonionoides turgidus. Yet E. scaber remains the most dominant taxon. Deeper stations (>55 m depth) located at the distal part of the mud patch are dominated by B. aculeata, A. falsobeccarrii, N. polymorphinoides and E. scaber. Accompanying these taxa are Bulimina marginata, Rectuvigerina phlegeri, Nonion faba and Paracassidulina neocarinata, which are typical of mid- and outer-shelf ecosystems enriched in sedimentary organic matter. 
PY 2022
PD JAN
SO Continental Shelf Research
SN 02784343
PU Elsevier BV
VL 232
UT 000792572700003
DI 10.1016/j.csr.2021.104616
ID 85137
ER

EF