The impact of easily oxidized material (EOM) on the meiobenthos: Foraminifera abnormalities in shrimp ponds of New Caledonia; implications for environment and paleoenvironment survey
|Author(s)||Debenay J.P.1, Della Patrona Luc2, Herbland Alain, Goguenheim H3|
|Affiliation(s)||1 : IRD, UR Paleotrop 055, F-98848 Noumea, France.
2 : IFREMER, Ifremer LEAD Lagons Ecosyst & Aquaculture Durable, F-98846 Noumea, Nouvelle Caledo, France.
3 : TAHITI, F-98719 Polynesie Francaise, France.
|Source||Marine Pollution Bulletin (0025-326X) (Elsevier), 2009-09 , Vol. 59 , N. 8-12 , P. 323-335|
|WOS© Times Cited||14|
|Keyword(s)||SW Pacific, Bioindicators, Organic matter, Shrimp ponds, Deformations, Foraminifera|
|Abstract||This study was carried out in shrimp ponds from New Caledonia, in order to determine the cause of the exceptional proportion of abnormal tests (FAI) (often >50%, sometimes >80%). FAI was positively correlated to the quantity of easily oxidized material (EOM) deposited on the bottom of the ponds and to the sediment oxygen demand, and negatively correlated to redox. These results suggest that a very high FAI is a potential indicator for great accumulations of native organic matter, leading to a high sediment oxygen demand. When studying ancient sediments in core samples, exceptional abundances of abnormal tests may indicate periods of high accumulation of EOM, and therefore of oxygen depletion. This finding should help in better management of aquaculture ponds, but should also allow new insight into the interpretation of sedimentary records, providing a useful proxy for paleoenvironmental reconstructions.|