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All Journal JFMR (Journal of Fisheries and Marine Research)
iis triyulianti
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Engineering Environmental Science

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The Marine Carbonate System at Maluku and Sulawesi Seas iis triyulianti; I Nyoman Radiarta; Agung Yunanto; Novia Arinda Pradistya; Fikhrul Islami; Mutiara R Putri
JFMR (Journal of Fisheries and Marine Research) Vol 2, No 3 (2018): JFMR VOL 2 NO 3
Publisher : JFMR (Journal of Fisheries and Marine Research)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (637.187 KB) | DOI: 10.21776/ub.jfmr.2018.002.03.8

Abstract

Maluku and Sulawesi Seas are parts of Indonesian Large Marine Ecosystem in the east area which has an important role for Indonesian fisheries activities.  Those areas are facing the climate change phenomena that could change their marine ecosystem quality.  Marine carbonate system is very important for controlling the circulation of CO2 between the atmosphere and the ocean as well as regulating the pH value of waters. We conducted in situ measurement of marine carbonate system parameters (pH, Total Alkalinity, Total CO2 (TCO2) and pCO2) during IJEP cruise on September 2016 to analyses spatial variations of the marine carbonate system in the Northwest Monsoon period.  The results of marine carbonate system showed that in general Maluku and Sulawesi Seas are under super saturation of CO2 or acts as source of CO2 which have range value of sea surface partial of CO2(pCO2) between 280 – 500 µatm.  Spatial distribution of sea surface pH values measured with optical sensor at study sites showed varied between 8,03 – 8,15.  Measurement results of Total alkalinity (TA) by using titration method varied between 2300 – 2400 µmol/Kg meanwhile range value of TCO2 was 2300 – 2500 µmol/Kg at surface waterand it’s increased through the deep water with the range value of TCO2 was 2500 – 2800 µmol/Kg at deeper layer of water.Characteristic of marine carbonate system between Maluku  and Sulawesi Seas was different in the Southeast monsoon period indicates complex marine biogeochemistry processes influences those system.
PENILAIAN STATUS TROFIK EKOSISTEM TERUMBU KARANG DAN LAMUN DIPERAIRAN SELAT LEMBEH DENGAN APLIKASI INDEKS TRIX (TROPHIC LEVELASESSMENT OF COASTAL AND SEAGRASS ECOSYSTEM IN LEMBEH STRAIT WATERS USING TRIX INDICES APLICATION) iis triyulianti; Eghbert Evan Lampou; Nuryani Widagti; I Gede Adi Swastana
JFMR (Journal of Fisheries and Marine Research) Vol 5, No 2 (2021): JFMR VOL 5 NO.2
Publisher : JFMR (Journal of Fisheries and Marine Research)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jfmr.2021.005.02.30

Abstract

Dalam pengelolaan sumber daya perairan dibutuhkan informasi dasar terkait status trofik untuk memberikan gambaran terkait pengkayaan nutrien yang menyebabkan peningkatan kesuburan perairan. Penilaian status trofik berguna untuk menggambarkan tingkat kesuburan suatu perairan.  Tingkat kesuburan perairan terukur dari unsur hara dan tingkat kecerahan serta aktivitas biologi lainnya yang terjadi di suatu badan air. Aplikasi indeks TRIX dapat digunakan untuk pemantauan kualitas lingkungan dan telah diaplikasikan untuk penilaian status trofik di lingkungan perairan pesisir. Penilaian status trofik dengan aplikasi indeks TRIX menggunakan kombinasi linear log dari 4 variabel yaitu Klorofil-a, Konsentrasi Oksigen Terlarut (DO), Total Nitrogen (Nitrat, Nitrit dan Amonia) dan Total Fosfat. Hasil penghitungan dengan formula untuk aplikasi indeks TRIX di perairan selat Lembeh diperoleh nilai indeks TRIX keseluruhan stasiun pengamatan adalah 2. Nilai indeks TRIX yang diperoleh menunjukkan bahwa lokasi studi memiliki kategori status trofik yang rendah atau Low Trophic Level. Low Trophic Level menunjukkan nilai indeks TRIX lebih rendah dari 4 yang umumnya berasosiasi atau mencirikan perairan pesisir.Basic information of tropic status or tropic level is needed in terms of aquatic management resources for giving us the description of water enrichment by nutrients that cause the increasing of water productivity. The assessment of tropic status is used for describing waters eutrophication level. The waters eutrophication level is measured from nutrient and the level of transparency waters includes biological activities in those water columns. TRIX index application used for environmental quality monitoring and it has been applied for assessing tropic status in coastal waters. The assessment of tropic status uses a linear logarithmic combination of 4 variables were Chlorophyll-a, concentration of dissolved oxygen, Total Nitrogen (Nitrate, Nitrite, Ammonia) and Phosphate. The result of trophic status assessment in marine coastal of Lembeh strait waters was obtained an index TRIX value for all stations respectively is 2. Those TRIX index values showed that the level status trophic index in our study location is in Low Tropic Level. Low Tropic Level indicating values lower than 4 TRIX units are associated with scarcely productive coastal waters
Co-Authors Agung Yunanto Eghbert Evan Lampou Fikhrul Islami I Gede Adi Swastana I Nyoman Radiarta Mutiara R Putri Novia Arinda Pradistya Nuryani Widagti