Sediment ejected by the shrimp from their burrows had elevated levels of Zn (relative to surface sediments) at one of the sites. Levels of both Zn and Cd were significantly higher in burrow walls than in surface sediments. Densities of ghost shrimp ( Sergio trilobata and Lepidophthalmus louisianensis) averaged 33/m 2 at our sites, and they ejected sediment at an average rate of 28 g/burrow/day. Ghost shrimp densities and their rate of sediment ejection were also quantified, as were sediment organic content and silt + clay content. ![]() We measured levels of HNO 3-extractable zinc and cadmium in surface sediment, in ghost shrimp burrow walls and in sediment ejected by the ghost shrimp from their burrows, at five sandy intertidal sites in Tampa Bay. This study investigated the effects that ghost shrimp have on the distribution of metals in sediment.
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