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- W1964990005 abstract "Abstract Previous laboratory experiments have shown that the common amphipod Monoporda affinis has low tolerance to sulphide and hypoxia but is able to sustain high sulphide concentrations in the sediment, for several weeks, by creating microhabitats where sulphide is rapidly oxidised. These amphipods exhibit nocturnal swimming activity and re-enter the sediment at dawn, where they remain buried during the day. We tested, in the laboratory, if the amphipods are indifferent to the presence of sulphide when entering sediments. In a sediment choice experiment, where the amphipods were offered to burrow in sulphide rich sediment (SR) with or without added food or sulphide free sediment (SF) with food, the amphipod showed clear preference for SF both at medium and high field densities and showed no preference to added food resources in SR. The oxygen penetration in the sediment was much higher in SF than SR both at the start and at the end of the experiment. There was also a highly significant correlation between the number of amphipods found in the sediment and the depth of the oxygen layer. When amphipods were given the choice of SR only either with or without added food there was a clear initial (1st and 2nd week) preference for sediments without added food while no difference was found at the end of the experiment after eight weeks. We conclude that the amphipods are unlikely to exploit open habitats when anoxic or hypoxic bottoms turn oxic by active immigration from adjacent areas. However, the amphipods are likely to play an important part in the recovery of larger previously anoxic areas when passively carried by currents from distant normoxic areas." @default.
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- W1964990005 date "2002-09-01" @default.
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- W1964990005 title "Recovery of soft-bottoms after anoxic events: Laboratory experiments with the amphipodMonoporeia affinisfrom the Baltic Sea" @default.
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- W1964990005 doi "https://doi.org/10.1080/00785236.2002.10409494" @default.
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