Pengaruh Kontaminasi Logam Berat Di Sedimen Pada Komunitas Makrozoobentos Di Beberapa Situ Dan Waduk Di Jawa Barat (Effect of Heavy Metals Contamination in Sediments on the Macrozoobenthos Community in Some Small Lakes and Reservoirs)

摘要

Presence of heavy metals in aquatic ecosystems have been reported to cause problems in aquatic organisms. One of the aquatic organisms that have risk for exposure by heavy metals from sediments is macrozoobenthos. This paper aims to describe the influence of heavy metal contamination in sediments to the structure of macrozoobenthos communities in lentic ecosystem (small lakes and reservoirs). This study was conducted in June 2009 to September 2011 in some small lakes and reservoirs which are in West Java and Jakarta provinces. Macrozoobenthos samples were collected by using Ekman grab. The results showed that there is a low correlation index with a high diversity of macrozoobenthos contamination by arsenic. The contribution of Pb and Cd in giving effect to diversity index is relatively small. The existence of macrozoobenthos Coleoptera (Simsonia sp.), Leeches (Placobdella sp.), Chironomid larvae (Ablabesmyia sp.), and (Tanytarsus sp.) relatively tolerant to high contamination arsenic in sediment, and low pH and temperature. The use of diversity index in this study was relatively sensitive to reflect the disruption caused by heavy metal.