Abstract
Abstract Secondary production of the amphipod Synchelidium lenorostralum was examined on a temperate sandy shore, southern Korea, on the basis of monthly samples from July 1996 to June 1997. Secondary production was estimated by the size-frequency method. Biomass structure showed two peaks in fall and spring, with maximum biomass in April. Biomass in the spring breeding period was higher than that in the fall. The annual secondary production of S. lenorostralum was 1.09 g DW m−2 yr−1 with an annual P/B ratio of 5.68. Secondary production of S. lenorostralum fell within the range observed for other amphipods from intertidal sandy shores, whereas the P/B ratio was higher than that recorded previously. The combination of high abundance and a high P/B ratio suggests an important role for S. lenorostralum in the sandy shore ecosystem as a trophic link from primary producers to higher consumers.
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