Browsing by Author "Nasution, Syafrudin"

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    Estimation of Mangrove Forest’s Carbon Stock in Kuala Indragiri Coastal Riau Province – Indonesia
    (2017-10-01) Mariana; Felix, Feliatra; Sukendi, Sukendi; Nasution, Syafrudin
    Mangrove forest act as natural carbon stores, but the carbon will release if the trees were felled and the area were deforested. The amount of carbon stored within an area are varies according to the type of the vegetations, so it is need to develop the low carbon stock areas. Mangrove is one of the ecosystem’s key in climate changes as the carbon’s storage. Most of areas in Kuala Indragiri are low-lying areas (93.31%), such as, regional stream sediment, peat swamp areas with soil (peat), brackish forest areas (mangrove). Some of the area approximately 0-3 meters above sea level. The research design is the explorative research, by using nested quadrate method. There are 5 locations of carbon stocks sampling in Kuala Indragiri coastal: Sapat as station 1, Tanjung Lajau as station 2, Tanjung Melayu as station 3, Sei Bela as station 4 and Sei Buluh as station 5. Each station has three line transects consisting three plots of each transect. The total plots are 45 in each determined mangroves land. The methods followed the procedures developed by the Center for International Forestry Research (CIFOR) for mangrove forests. Based on the finding, mangrove vegetation in the Kuala Indragiri coastal consisted of fourteen species. In this study, the researcher developed a general allometric equation to estimate the individual tree biomass and soil carbon content. The finding showed that the estimation of the carbon stock in the whole mangrove forest in Kuala Indragiri coastal: the average ground mass C stocks at each observed station were estimated to be 767.28 ton/ha (trees strata), 92.84 ton/ha (belta strata) and average soil carbon at each station to be 492 ton/ha respectively. estimation of mangrove forest’s carbon stock at above ground biomass and soil biomass in Kuala Indragiri coastal Riau province – Indonesia totally to be 1.352,31 Ton/Ha.
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    IDENTIFIKASI BAKTERI PATOGEN DI PERAIRAN WADUK KOTO PANJANG KABUPATEN KAMPAR RIAU
    (2016-07-13) Syawal, Henni; Nasution, Syafrudin; Ferdiansyah, Risman
    Penelitian ini bertujuan untuk mengetahui jenis-jenis bakteri patogen yang terdapat di Perairan Waduk Koto Panjang, yang berpotensi menyerang atau menginfeksi ikan-ikan yang dipelihara pada keramba jaring apung (KJA). Sehingga dapat menimbulkan wabah penyakit pada usaha budi daya ikan. Metode yang digunakan adalah metode survey, yaitu mengambil sampel di lapangan dan dianalisis di laboratorium. Pengambilan sampel dilakukan dilima stasiun yang memiliki kegiatan pemeliharaan ikan di KJA, yaitu stasiun 1 (Dam Site), stasiun 2 (Pulo Gadang), stasiun 3 (Batu Langkah Besar), stasiun 4 (Muara Mahat), dan stasiun 5 (Tanjung Alai). Pengambilan sampel dilakukan sebanyak tiga kali dalam waktu tiga bulan (bulan Juli, Agustus, September), setiap pengambilan sampel dilakukan ulangan sebanyak tiga kali. Berdasarkan hasil penelitian ditemukan 5 jenis bakteri patogen yang berpotensi menginfeksi ikan-ikan yang dibudidayakan di dalam keramba jaring apung, yaitu bakteri Streptococcus sp., Vibrio sp., Enterobacter sp., Aeromonas sp., dan Pseudomonas sp. Stasiun 1 (Dam Site) merupakan daerah yang paling banyak ditemukan jenis bakteri patogen pada bulan Juli, yaitu bakteri Streptococcus sp., Vibrio sp., Enterobacter sp., Aeromonas sp., dan Pseudomonas sp., sedangkan pada bulan September, ditemukan empat jenis, yaitu Streptococcus sp., Vibrio sp., Aeromonas sp., dan Pseudomonas sp.