Dinamika Sebaran Bakteri Heterotrofik di Teluk Jakarta. Flandrianto Sih Palimirmo, Ario Damar, Hefni Effendi

ABSTRAK

Teluk Jakarta merupakan salah satu ekosistem perairan dengan tingkat pencemaran organik tertinggi di dunia. Kondisi ekologis perairan Teluk Jakarta akan memengaruhi kondisi ekosistem, termasuk sebaran bakteri heterotrofiknya. Penelitian ini bertujuan untuk mengetahui dinamika sebaran bakteri heterotrofik di perairan Teluk Jakarta. Pengambilan sampel dilakukan sebanyak 4 kali ulangan selama tahun 2013. Data yang digunakan berupa data primer dan sekunder. Hasil penelitian menunjukkan kelimpahan bakteri heterotrofik berfluktuasi dan relatif tinggi pada daerah dekat dengan muara sungai dan semakin menurun kelimpahannya di daerah laut. Kelimpahan tertinggi didapat di Stasiun 10 dengan kepadatan sebesar 3,5 × 106 CFU/ml dan kelimpahan terendah didapat di stasiun 1 dengan kepadatan sebesar 1,8 × 105 CFU/ml. Kepadatan tertinggi didapat pada bulan Oktober dengan rerata sebesar 1,3 × 106 CFU/ml dan kepadatan terendah didapat pada bulan Juli dengan rerata sebesar 3,5 × 105 CFU/ml. Kelimpahan bakteri heterotrofik memiliki hubungan erat dengan klorofil-a.

Kata kunci: bakteri heterotrofik, dinamika sebaran, teluk Jakarta

ABSTRACT

Jakarta Bay is one of the aquatic ecosystems with the highest level of organic pollution in the world. Ecological condition of Jakarta Bay’s water will affect the ecosystem, including the distribution of heterotrophic bacteria. This study aims to determine the dynamics of the heterotrophic bacteria distribution in the Jakarta Bay. Sampling was conducted four times in 2013. Primary and secondary data was used in this research. The results showed that the abundance of heterotrophic bacteria fluctuated and were relatively high in the area near the mouth of the river and it decreased towards the outer of the bay. The highest abundance was obtained at Station 10 with 3,5 × 106 CFU/ml density and the lowest one was at Station 1 with 1,8 × 105 CFU/ml density. The highest density was obtained in October with an average of 1,3 × 106 CFU/ml and the lowest density was obtained in July with the average of 3,5 × 105 CFU/ml. Abundance of heterotrophic bacteria had strong relationships with chlorophyll-a.

Keywords: distribution, heterotrophic bacteria, Jakarta bay

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