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Sulawesty, Fachmijany
Research Center for Limnology
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Environmental Science

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KARAKTER LIMNOLOGIS PERAIRAN EMBUNG DI LOMBOK TENGAH NUSA TENGGARA BARAT, APRIL 2012 Sulawesty, Fachmijany; Crismadha, Tjandra; Satya, Awalina; Yoga, Gunawan Pratama; Mardiati, Yayah; Mulyana, Endang; Widoretno, Mey R.
LIMNOTEK - Perairan Darat Tropis di Indonesia Vol 20, No 2 (2013)
Publisher : Research Center for Limnology

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Perairan embung memiliki peran penting dalam menunjang berbagai aktifitas kehidupan masyarakat propinsi Nusa Tenggara Barat (NTB) terutama untuk pertanian, peternakan dan air baku. Musim penghujan berdurasi lebih pendek dibandingkan musim kemarau, sehingga perairan embung pada dasarnya berfungsi sebagai penampung air di musim penghujan dan sumber air  di musim kemarau. Penelitian ini bertujuan untuk memperoleh data karakteristik limnologis perairan embung khususnya di Kabupaten Lombok Tengah, Propinsi Nusa Tenggara Barat. Pengambilan sampel dilakukan pada bulan April 2012 di enam stasiun pada lima embung, di Kabupaten Lombok Tengah, Nusa Tenggara Barat, yaitu 1) Batujai (Bendungan), 2) Batujai (karamba jaring apung/KJA), 3) Dabak (Sengkol), 4) Pengkemit, 5) Cerigi, dan 6) Pejanggi.  Parameter yang diukur adalah N-nitrat, N-amonia, N-nitrit, nitrogen total (TN), ortofosfat, fosfor total (TP), klorofil-a, materi organik total (TOM),  Suhu, pH, Konduktivitas, Total padatan terlarut (TDS), oksigen terlarut (DO), kejenuhan oksigen (DO saturation), kekeruhan, dan kedalaman Secchi.  Hasil pengamatan menunjukan bahwa perairan embung cenderung memiliki tingkat kesuburan yang tinggi  berdasarkan kandungan senyawa nitrogenik dan fosfor, serta klorofil-a. Kandungan materi organik total dan TDS cukup tinggi dan kekeruhan sangat tinggi di embung Pejanggi.   Kelimpahan, jumlah jenis dan indeks keragaman fitoplankton rendah,  sedangkan kelimpahan zoobenthos cukup tinggi.
KOMUNITAS FITOPLANKTON KAITANNYA DENGAN KUALITAS PERAIRAN DANAU SENTANI Sulawesty, Fachmijany
LIMNOTEK - Perairan Darat Tropis di Indonesia Vol 23, No 2 (2016)
Publisher : Research Center for Limnology

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Phytoplankton response to changes in the environment can be seen from changes in species diversity and abundance. Lake Sentani is one of the large lakes located in Papua Province, precisely in the district of Jayapura. Various activities in this lake will affect the waters quality of Lake Sentani, then made observations regarding the composition and abundance of phytoplankton in Lake Sentani. Observations were made in April 2014 at eight locations in the Lake Sentani are assumed to represent the condition of the waters of the lake. Samples taken as many as 10 liters of water, filtered using a plankton net no. 25, and preserved with Lugol 1%. Abundance computed using Sedgwick Rafter method. Analysis of the phytoplankton community structure seen by calculating the Diversity Index, Eveness Index and Dominance Index. There are six phyla and 50 species of phytoplankton were found, comprised of Chlorophyta (23 species), Cyanophyta (6 species), Bacillariophyta (18 species), Chrysophyta (1 species), dinoflagellate (1 species) and Euglenophyta (1 species). The abundance of phytoplankton in April 2014 ranged between 231-11.693 individual/Liter. Based on its abundance, the category of Lake Sentani mesotrofik, even when viewed from the dominant species, the tendency is eutrophic. Diversity Index ranged from 0.609 to 2.464 indicates low to moderate community stability, Eveness Index ranged from 0.047 to 0.243, this value is close to zero means the uniformity among species in community is lower, there is usually a species that dominates. If viewed from Dominance Index, dominance species occur in some areas of observation at Lake Sentani. CCA ordination showed no major effect of phosphate parameter on phytoplankton distribution in any location either on the surface and secchi depth. But in the bottom waters, phosphate, nitrate, dissolved oxygen, pH and temperature have an influence on the distribution of phytoplankton in Lake Sentani .
Co-Authors Crismadha, Tjandra Mardiati, Yayah Mulyana, Endang Satya, Awalina Widoretno, Mey R. Yoga, Gunawan Pratama