Seagrass burial by dredged sediments: benthic community alteration, secondary production loss, biotic index reaction and recovery possibility.
作者： V. Tu Do , Xavier de Montaudouin , Hugues Blanchet , Nicolas Lavesque
DOI: 10.1016/J.MARPOLBUL.2012.08.025
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摘要: Abstract In 2005, dredging activities in Arcachon Bay (France) led burying 320,000 m2 of Zostera noltii intertidal seagrass. Recovery by macrobenthos and seagrass was monitored. Six months after works, absent drastically different from surrounding vegetated stations. Rapidly due to sediment dispersal, disposal area divided into a sandflat with specific benthic community which maintained its difference until the end survey (2010), mudflat where associated fauna became similar those adjacent Macrobenthic needs 3 years recover while 5 years station impacted mud. The secondary production loss works low. this naturally carbon enriched system, univariate biotic indices did not perform well detect destruction recovery. Multivariate index MISS gave more relevant conclusions simplified version tested success, at local scale.
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