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All Journal Jurnal Ilmu dan Teknologi Kelautan Tropis Jurnal Segara OSEANA
Rachma Puspitasari
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Biochemistry, Genetics & Molecular Biology Decision Sciences, Operations Research & Management Earth & Planetary Sciences Environmental Science Library & Information Science Materials Science & Nanotechnology Other

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Chaetoceros gracilis AS A BIOINDICATOR OF SEDIMENT QUALITY Rachma Puspitasari; Lestari Lestari
Jurnal Ilmu dan Teknologi Kelautan Tropis Vol. 6 No. 1 (2014): Electronik Jurnal Ilmu dan Teknologi Kelautan Tropis
Publisher : Department of Marine Science and Technology, Faculty of Fisheries and Marine Science, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (422.629 KB) | DOI: 10.29244/jitkt.v6i1.8640

Abstract

Chronic sediment toxicity tests could be used to evaluate the effects of sediment on critical stages in the life of an organism like invertebrate larvae and microalgae. Microalgae play an important role in aquatic ecosystem due to their role as producer in food chain producing organic matter and oxygen through photosynthesis process. This paper aimed to assess sediment quality of Semarang water using chronic sediment toxicity test. Research was conducted by testing 13 sediment samples from Semarang coastal region in August, 2010. Results showed that sediments exposed for 96 hours were still able to stimulate the growth of C. gracilis eventhough the copper concentration was above standard value provided by the CCME. The conclusion from this research was that sediment in Semarang still in good condition and can support growth of C. gracilis as primary producer. Chronic sediment toxicity test using C. gracilis could be combined with heavy metal measurement for sediment quality asessment. Keywords: sediment, bioindicator, diatomae, C. gracilis, chronic toxicity, Semarang
Sensitivitas Nitzschia Sp Terhadap Tembaga dan Kadmium Rachma Puspitasari; Triyoni Purbonegoro
Jurnal Segara Vol 15, No 1 (2019): April
Publisher : Pusat Riset Kelautan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (455.682 KB) | DOI: 10.15578/segara.v15i1.6491

Abstract

Penggunaan organisme uji yang sesuai dengan bahan yang diuji adalah faktor yang sangat penting dalam bioassay. Berbagai organisme uji tropis telah banyak digunakan di Indonesia seperti ikan, bulu babi, dan fitoplankton. Fitoplankton seperti Chaetoceros gracilis, Tetraselmis sp., Isochrysis sp., Pavlova sp., yang hidup di kolom air telah dimanfaatkan dengan baik untuk bioassay. Namun, fitoplankton bentik seperti Nitszchia sp. belum dikenal secara luas. Tulisan ini bertujuan untuk menguji potensi Nitzschia sp. sebagai biota uji sedimen. Parameter yang diteliti adalah kurva pertumbuhan dan sensitifitas terhadap kadmium dan tembaga. Hasil penelitian menunjukkan bahwa pertumbuhan Nitszchia sp. meningkat pesat pada hari keempat hingga hari keenam. Setelah hari keenam, pertumbuhannya cenderung menurun. Kepekaan terhadap toksikan diindikasikan dengan nilai IC50 (Inhibition Concentration) sebesar 0,078 mg/Luntuk tembaga dan 0,26 mg/L untuk kadmium. Kesimpulan dari penelitian ini adalah Nitszchia sp. dapat digunakan sebagai organisme uji untuk bioassay sedimen karena memenuhi persyaratan kepadatan minimum uji serta sensitif terhadap kadmium dan tembaga. Nilai LOEC dan NOEC untuk tembaga berturut-turut sebesar 0,056 dan 0,032 mg/L sedangkan untuk kadmium sebesar 0,18 dan <0,18 mg/L. Nitzschia sp. tiga kali lebih sensitif terhadap tembaga dibandingkan dengan kadmium.
PENGEMBANGAN Nitzschia sp. SEBAGAI BIOTA UJI SEDIMEN Rachma Puspitasari
OSEANA Vol 42 No 1 (2017)
Publisher : Pusat Penelitian Oseanografi LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/oseana.2017.Vol.42No.1.36

Abstract

DEVELOPMENT of Nitzschia sp. AS SEDIMENT TEST ORGANISM. Sediment bioassay requires a test organism which suitable with the test material, for example sediment. However, benthic phytoplankton as the test organism has not been widely applied in Indonesia. Recently, bioassay test still uses phytoplankton which lives in water column such as Chaetoceros gracilis, Tetraselmis sp., Isochrysis sp., or uses another test organism like mussel, sea urchin larvae and amphipod. In addition, Nitszchia sp. is one of culture collection at Research Centre for Oceanography so it could be added value of culture collection. Therefore, this paper aims to describe the potential use of phytoplankton benthic, Nitzschia sp. as sediment test organism.
Co-Authors Lestari Lestari Triyoni Purbonegoro