The impact of organic waste contamination on the macrozoobenthos community and its potential as a bioindicator in Labuange Bay waters, Barru Regency, South Sulawesi Province

Abstract

Superintensive shrimp farming (Litopeneus vannamei) has been developed since 2012 in Barru district, South Sulawesi. Organic waste from uneaten shrimp feed has been discarded into Labuange waters during superintensive farming development. Accumulated organic waste in the sediment of Labuange sediment has an impact on the presence of macrozoobenthos. The study aims to analyze the structure of the macrozoobenthos community and its potential as a bioindicator of organic waste pollution in Labuange waters, Barru Regency, South Sulawesi. The study was conducted using a survey method. A sampling of Labuange sediment for macrozoobenthos analysis was carried out at six stations with six replications, respectively. The type of identified macrozoobenthos was then analyzed by CCA (Canonical Correlation Analysis) using PAST (Paleontological Statistics) software to calculate the strength of the relationship between the characteristics of the sediment and the macrozoobenthos indicator. Species and abundance of macrozoobenthos were analyzed using analysis of variance (ANOVA) to find out the differences of species and abundance of macrozoobenthos in each station. The results showed differences in macrozoobenthos abundance in each station, and found ten types of macrozoobenthos which had potential as an organic waste bioindicator, whose presence was directly related to the characteristics of sediments, in the form of organic carbon, organic matter, phosphate, pHf, redox potential and N-total namely Nassarius absconditus, Tenagodus sp., Nassarius sp., Tellina radiata, Tellina sp., Pinna sp., Vexillum sp., Arenicola sp., Cerithium sp., and Cerithium salebrosum. Based on the macrozoobenthos diversity index, heavy pollution was occurred at stations 1, 3, 4, 5, and 6, while station 2 was in moderate pollution.