CONTENT OF HEAVY METALS (Cr, Cu, Pb, and Zn) IN MACROZOOBENTHOS AT JAKARTA BAY

Abstract

Trace metal contamination of marine environments can be determined by measuring trace metal
concentration in sediments, water or biota. Biomonitor organisms have the advantages over other
measurements that they concentrate the portion of metals that are in a biologically available form, and this
portion which is usually of interest when assessments is being made of trace metal contamination.
Correspondingly, whole tissue trace metal concentrations of 4 metals in common Jakarta Bay benthic species
(polychaetes, molluscs, crustaceans) from contaminated locations were measured. The mean concentration
for Cu was 17.5 ± 21.8 μg g-1 dw in polychaetes, 11.9 ± 8.8 μg g-1 dw in molluscs, and 12.2 ± 5.5 μg g-1 dw in
crustaceans. The mean concentration for Cr was 172.8 ± 262.5 μg g-1 dw in polychaetes, 31.8 ± 62.8 μg g-1
dw in molluscs, and 28.5 ± 29.0 μg g-1 dw in crustaceans. The mean concentration for Zn was 152.4 ± 76.4
μg g-1 dw in polychaetes, 132.0 ± 106.3 μg g-1 dw in molluscs, and 515.8 ± 503.5 μg g-1 dw in crustaceans.
The mean concentration for Pb was 6.3 ± 13.6 μg g-1 dw in polychaetes and was 2.0 ± 4.5 μg g-1 dw in
molluscs. The study provides significant contribution to confirm the content of heavy metal in each common
benthic species inhabits coastal Jakarta Bay.