Soft-bottom community responses in a marine area influenced by recurrent dumping activities and freshwater discharges

MARINE POLLUTION BULLETIN

卷:156

Article

Foulquier, Clemence^1,2  Baills, Julien¹  Blanchet, Hugues³  D'Amico, Frank²  Rihouey, Didier¹ 

[1] CASAGEC INGN, 18 Rue Maryse Bastie, F-64600 Anglet, France

[2] Univ Pau & Pays Adour, Lab Math & Leursapplicat Pau, UPPA E2S, CNRS,UMR 5142, F-64600 Anglet, France

[3] Univ Bordeaux, Stn Marine Arcachon, UMR EPOC 5805, 2 Rue Prof Jolyet, F-33120 Arcachon, France

关键词: Dredge spoil disposal;    Flood event;    Wave climate;    Multiple disturbance;    Times series;    French Basque Country;   

DOI  :  10.1016/j.marpolbul.2020.111259

来源: Elsevier

【 摘 要 】

The results of a 3 years monitoring program to assess the effects associated with recurrent dredged spoil disposal activity in a naturally stressed subtidal coastal area subjected to estuarine inputs are described. Changes observed through time in environmental and anthropogenic variables have been analyzed using cumulated sums and compared to macrobenthic community structure. Results revealed a scarce impact of the recurrent dumping activities, with faunal assemblages derived from the main Tellina-venus community. The magnitude of estuarine influence appeared indeed greater on the soft-bottom community than the putative changes due to anthropogenic activities. Through a combination of high energetic conditions, structural changes were observed and ascribed to a flushing action of the highly channeled estuary. Finally, an exceptional flood was recorded over the monitoring period, resulting in a short-term spatial homogenization of the benthic community with an abundance burst of A. alba. Origins of this main new species are discussed.

【 授权许可】

Free