Mangrove has the ability to absorb waste and pollutants including heavy metals Pb. This study aims to identify sources of metals Pb contamination in mangrove forest area in Waiheru District and to analyze Pb content of in sediment and mangrove roots. The data collection method used was the direct observation (in situ measurement) and analysis of laboratory. Sediments and mangrove roots were analyzed by atomic absorption Spectrophotometry (AAS). Findings showed that It was identified three types of activity expected to become the potential of contamination sources of metal Pb in the area around mangrove forests namely; the agriculture activity, settlement and a motorboat. The metal content of Pb in sediment in around Sonneratia alba and Rhizophora apiculata exhibited the highest concentrations of 1, ISSN 2168-9148 2015 9129mg/kg and 1.7965 mg/kg, respectively. Meanwhile, the lowest was in around mangrove from species Avicennia marina with the Pb concentration of 0.7259 mg/kg. Among the three species of mangrove, A. marina roots indicated highest Pb concentration (0.2857 mg/kg). It means that A. marinawas more effective in reducing of the contaminant material of the metal Pb. Aquatic Science and Technology

Salah satu potensi ekosistem pesisir yang cukup luas ada di perairan Teluk Ambon Dalam adalah ekosistem mangrove. Ancaman bagi ekosistem mangrove yang ada di perairan Teluk Ambon adalah aktivitas yang berlangsung di sekitarnya (antropogenik). Adanya beberapa sungai yang bermuara di Teluk Ambon menjadi pendukung masuknya buangan/limbah dari darat. Logam berat Pb dan Cd telah terdeteksi pada air laut di perairan Teluk Ambon, sehingga dianggap penting untuk melakukan penelitian pada sedimen ekosistem mangrove. Tujuan dari penelitian ini adalah untuk mengetahui konsentrasi logam berat (Pb dan Cd) dalam sedimen pada ekosistem mangrove Teluk Ambon. Penentuan titik pengambilan sampel sedimen pada ekosistem mangrove dilakukan dengan menggunakan metode purposive sampling. Analisis sampel dilakukan dengan menggunakan metode Nitric Acid-Perchloric Acid Digestion. Hasil penelitian menunjukkan bahwa konsentrasi logam berat Plumbum (Pb) berkisar antara 18,25-35,98 mg/kg dan Cadmium (Cd) 1,57-2,70 mg/kg. Hasil analisis menunjukkan bahwa, Pb walaupun didapati dalam konsentrasi yang cukup tinggi namun belum melampaui ambang batas toksik, sementara Cd telah mendekati ambang batas toksik. Secara keseluruhan dapat disimpulkan bahwa, sedimen telah terkontaminasi logam berat Pb dan Cd namun belum berpengaruh pada ekosistem mangrove, dan merupakan indikasi bahwa terjadi filtrasi alami.

The waters of the Haruku Strait are one of the waters in Maluku Province highly used, both on the coast and in the sea. This allows waste ingress into the waters, this results in pollution which causes declining water quality. An indicator of declining aquatic environment quality is the presence of dissolved oxygen. Oxygen solubility in the waters is also influenced by the character of the water mass. The purpose of this study was to examine the water quality of the Haruku Strait, especially the DO, BOD and pH, turbidity and brightness. The research was carried out in July-September 2021. The method used was in situ measurement of parameter values by taking water samples using Niskin bottles. Furthermore, the concentrations of pH, DO and BOD were measured using a DO and BOD meter Instrument (Hanna Instrument) and a pH meter. The data were then analyzed with the help of Surfer 12 software and Microsoft Excel, the results were displayed in the form of a horizontal distribution map and a vertical distribution graph. The results showed that the concentration of dissolved oxygen (DO) in the waters of the Haruku Strait ranged from 5.76-8.82 mg/L, while the BOD ranged from 5.22-10.43 mg/L and the pH value was 7.0-8.5, brightness 5.5-13.5 m, and turbidity 0.35-1.75 FTU. The waters quality is classified as good and the health of the waters of the Haruku Strait based on the parameters of pH, DO and BOD can be categorized as clean when referred to the quality standards for ports, marine tourism and marine life.