FN Archimer Export Format
PT J
TI Seasonal modification of tidal flat sediment dynamics by seagrass meadows of Zostera noltii (Bassin d'Arcachon, France)
BT 
AF GANTHY, Florian
   SOTTOLICHIO, Aldo
   VERNEY, Romaric
AS 1:1,2;2:1;3:2;
FF 1:;2:;3:PDG-ODE-DYNECO-PHYSED;
C1 Univ Bordeaux 1, EPOC Lab, UMR 5805, CNRS, F-33405 Talence, France.
   IFREMER, Dept Dynam Environm Cotier, Equipe PHYSED, F-29280 Plouzane, France.
C2 UNIV BORDEAUX, FRANCE
   IFREMER, FRANCE
SI BREST
SE PDG-ODE-DYNECO-PHYSED
IN WOS Ifremer jusqu'en 2018
   copubli-france
   copubli-univ-france
IF 2.476
TC 45
UR https://archimer.ifremer.fr/doc/00067/17825/105348.pdf
LA English
DT Article
BO Planula IV
DE ;Ecosystem engineer;Zostera noltii;Growth dynamics;Sediment level;Biometric survey;Arcachon lagoon;Acoustic altimetry
AB The Arcachon lagoon (Atlantic coast, SW France) is a mesotidal embayment where seagrass beds colonize the majority of intertidal areas. In recent years, the surface area of Zostera noltii meadows has considerably decreased, with possible consequences for the sediment balance of the lagoon. However, such interactions are poorly understood, and knowledge of the relationship between hydro-sedimentary processes and small intertidal meadows, such as Z. noltii, is limited.An intertidal mudflat, with variable meadow coverage, was studied during an annual survey. The study consisted in continuous high-frequency monitoring of bed altimetry, tidal elevation and waves. Sediment parameters and meadow characteristics were analyzed using samples collected monthly. Acoustic altimetry was validated as an efficient method to measure bed elevation in a vegetated environment, despite the presence of leaves under the transducer. The acoustic altimeter was also shown to have the potential to accurately estimate canopy height in a submerged environment. Our survey data showed centimetric bed accretion at all vegetated stations. Accretion was positively correlated with seasonal growth of themeadows. During seasonal degeneration, themeadow prevented erosion of the sea bed. These results highlight the important role of seagrasses as ecosystem engineers.
PY 2013
PD JAN
SO Journal Of Marine Systems
SN 0924-7963
PU Elsevier Science Bv
VL 109
UT 000314427500018
DI 10.1016/j.jmarsys.2011.11.027
ID 17825
ER

EF