The influence of long emersion on biota, ammonium fluxes and nitrification in intertidal sediments of Marennes-Oleron Bay, France

摘要

A comparative study between waterlogged and reflooded intertidal sediments was under- taken in March and June 1999 through statistical analysis of selected sediment parameters (biota, salinity, O_2, E_h), pool sizes and benthic fluxes of nutrients and oligochaetes from upper nitrification rates. In March samples, absence of polychaetes and oligochaetes form upper sediment horizons were due to erosional events sweeping away surface sediments. Presence of richer annelid assemblages in June samples indicated more stable hydrodynamic conditions that favoured the development of benthic microalgae biofilms.