scholarly journals FLUKS GAS RUMAH KACA CO2, CH4DAN N2O PADALAHAN EKOSISTEM MANGROVE DI SUNGAI TALLO, MAKASSAR (Fluxes of greenhouse gases CO2, CH4 and N2O from mangrove soil in TalloRiver, Makassar)

2018 ◽  
Vol 18 (2) ◽  
Author(s):  
Rahman Rahman ◽  
Yusli Wardiatno ◽  
Fredinan Yulianda ◽  
Hefni Effendi ◽  
Iman Rusmana
Keyword(s):  
Gas Chromatography ◽  
Greenhouse Gases ◽  
High Tide ◽  
Mangrove Ecosystem ◽  
Gas Analysis ◽  
Gas Sampling ◽  
Mangrove Soil ◽  
Mangrove Ecosystems ◽  
Greenhouse Gas Flux ◽  
Ch4 And N2o

Studies on the fluxes of greenhouse gases in mangrove ecosystems especially during tides are relatively scarce. The research was conducted in Tallo River Makassar which is a mangrove ecosystem habitat. Gas sampling was done by utilising size 0,5x0,5x1 m3 chamber through a syringe during the tidal periods. Gas analysis was done using gas chromatography methods. The research shows that the flux of CO2 gasduring high tide was 204,84 mg m-2 hr-1 or 1,79 kg m-2 year-1  and 183,81 mg m-2 hr-1 or 1,61 kg m-2 year-1 during low tide, while the flux of CH4 gaswas 0,75 mg m-2 hr-1 or 0,007 kg m-2 year-1  during high tide and 0,62 mg m-2 hr-1 or 0,005 kg m-2 year-1 during low tide, and the flux of N2O gaswas 0,141 mg m-2 hr-1 or 0,0012 kg m-2 year-1  during high tide and 0,145 mg m-2 hr-1 or 0,0013 kg m-2 year-1  during low tide. Keywords : greenhouse gas flux, mangrove ecosystem, Tallo River

scholarly journals Karakter Rhizobakteri Pelarut Fosfat Potensial dari Rhizosfer Tumbuhan Mangrove Teluk Awur Kabupaten Jepara secara Mikrobiologi

2020 ◽  
Vol 18 (1) ◽  
pp. 58-66
Author(s):  
Eka Oktaviani ◽  
Arina Tri Lunggani ◽  
Rejeki Siti Ferniah
Keyword(s):  
Plant Growth ◽  
High Tide ◽  
Plant Growth Promoting Rhizobacteria ◽  
Mangrove Ecosystem ◽  
Mangrove Plant ◽  
Mangrove Ecosystems ◽  
Plant Growth Promoting ◽  
Growth Promoting ◽  
Phosphate Solubilizer

Ekosistem mangrove terdiri dari komponen penyusun komunitas mangrove yang berinteraksi dengan faktor lingkungan di habitat tersebut. Ekosistem ini mudah mengalami kerusakan akibat kondisi pasang naik dan pasang surut wilayah perairan laut maupun hilir sungai, yang bermuara ke perairan laut. Peran penting ekosistem ini adalah dalam perlindungan daerah pesisir karena mampu melawan kerusakan yang disebabkan oleh perairan laut, seperti tsunami dan badai siklon tropis. Akan tetapi, ekosistem ini sering tidak diperhatikan atas fungsi tersebut. Ekosistem ini dilindungi di dunia karena memiliki tingkat kerusakan komponen penyusun yang tinggi. Ekosistem mangrove Teluk Awur yang terletak di Kabupaten Jepara, Provinsi Jawa Tengah, merupakan  salah satu ekosistem mangrove yang mengalami kerusakan cukup parah karena perluasan lahan budidaya ikan (tambak), sehingga mendorong terjadinya erosi pantai. Peremajaan kembali dan konservasi ekosistem mangrove dapat dilakukan dengan menggunakan bakteri tanah yang mampu mendukung pertumbuhan tanaman atau yang biasa disebut Plant Growth Promoting Rhizobacteria (PGPR). Salah satu mekanisme pendukung pertumbuhan tanaman oleh kelompok PGPR dapat dilakukan dengan aktivitas pelarutan fosfat karena fosfat dalam tanah berada dalam bentuk senyawa yang sulit diserap oleh tanaman. Penelitian ini bertujuan untuk memperoleh isolat Rhizobakteri pelarut fosfat yang unggul dalam melarutkan fosfat secara in-vitro dan mengetahui karakter isolat yang diperoleh. Isolasi dan penapisan rhizobakteri pelarut fosfat dilakukan menggunakan medium Pikovskaya agar. Karakterisasi isolat potensial secara mikrobiologi dan uji aktivitas biokimia. Hasil penelitian menunjukkan bahwa rhizobakteri pelarut fosfat potensial yang berhasil diisolasi, secara mikrobiologi teridentifikasi ke dalam genus Enterobacter. Mangrove ecosystems consist of constituent components of mangrove communities that interact with environmental factors in the habitat. This ecosystem is susceptible to damage due to the high tide and tidal conditions of the sea and downstream rivers that flow into the ocean waters. The important role of this ecosystem is in the protection of coastal areas because it is able to resist damage caused by marine waters such as tsunamis and tropical cyclone storms. However, this ecosystem is often overlooked to these functions. This ecosystem is protected in the world because it has a high level of damage to its constituent components. Mangrove ecosystem of Teluk Awur, which is located in Jepara Regency, is one of the mangrove ecosystems that suffered severe damage due to the expansion of fish farming land (ponds). Rejuvenation and conservation of mangrove ecosystems can be done by using bacteria that support mangrove plant growth, which commonly called Plant Growth Promoting Rhizobacteria (PGPR). One of the supporting mechanisms of plant growth by the PGPR group can be carried out with phosphate dissolving activity because phosphate in the soil is in the form of compounds that are difficult to absorb by plants. This study aims to obtain potential phosphate solubilizer Rhizobacteria in dissolving phosphate in-vitro and to determine character of the obtained isolate. Isolation and screening of potential phosphate solubilizer Rhizobacteria were carried out using Pikovskaya agar medium. Microbiological characterization of potential isolates was carried out based on microbiological and/or biochemical activity. The results showed that potential phosphate solubilizer Rhizobacteria, microbiologically identified to genus of Enterobacter.

scholarly journals Mollusca diversity in mangrove ecosystem of Delta Tumpat Kelantan

2021 ◽  
Vol 8 (2) ◽  
pp. 99-102
Author(s):  
Raudatul Raihana Ahmad ◽  
Marinah Muhammad ◽  
Nur Khyairatul Syafinie Abdul Majid ◽  
Noor Janatun Naim Jemali
Keyword(s):  
Diversity Index ◽  
High Tide ◽  
Mangrove Ecosystem ◽  
Physical Habitat ◽  
Ecological Role ◽  
Mangrove Ecosystems ◽  
High Species Diversity ◽  
Aquatic Vertebrates ◽  
Mollusc Species ◽  
The Difference

Mangroves play a significant ecological role as a physical habitat and nursery grounds for a wide variety of aquatic vertebrates and invertebrates include molluscs. This study focuses on assessing the diversity and characteristics of mollusc species in disturbed and undisturbed mangrove ecosystem areas in Delta Tumpat, Kelantan. In each site, molluscs were collected using dredging method during high tide and gleaning technique during low tide. Physical characteristics and diversity index (H’) were calculated for both sites. A total of 14 mollusc species were found in the study area including five species from Bivalvia and nine species from Gastropoda class. More species were found in the undisturbed area which had produced a high species diversity (H’=1.99) compared to the disturbed area. The biggest species found at both areas was Telescopium telescopium with 7.62cm in size. Meanwhile, Cerithedia aurisfelis was the smallest species found with the size of 0.87cm. The difference in the growth of molluscs species in mangrove ecosystems depends on the quality and quantity of available food resources.

Species Density and Lead (Pb) Pollution in Mangrove Ecosystem, South Kalimantan

2020 ◽  
Vol 5 (1) ◽  
pp. 70-81
Author(s):  
Anang Kadarsah ◽  
Dafiuddin Salim ◽  
Sadang Husain ◽  
Marta Dinata
Keyword(s):  
Heavy Metal ◽  
Oil Palm ◽  
Ph Value ◽  
Coal Mines ◽  
Organic Matter Content ◽  
Mangrove Ecosystem ◽  
Organic Content ◽  
Species Density ◽  
Pb Pollution ◽  
Mangrove Ecosystems

Its crucial to get information about lead (Pb) heavy metal pollution from mining and oil palm plantation on species density in mangrove ecosystem, to anticipate its impacts. This study aimed is to compare the types and densities of vegetation in mangrove ecosystems allegedly due to mining in Setarap village, Tanah Bumbu Regency and oil palm plantations in Kuala Tambangan Village, Tanah Laut Regency. We also analysis the condition of waters (TDS, pH and DO) and organic content in sediments to acquire data from the South Kalimantan mangrove ecosystems. The results showed there were four species of true mangroves (Avicennia alba, Acanthus ebracteatus, Nypa fruticans and Rhizophora apiculate) could live well in the environment affected by mining or oil palm plantations. The species density for trees was low (933 ind/ha) for mangroves affected by coal mines, while those affected by oil palm plantations had higher densities (1,067 ind/ha). pH value of waters in affected area by coal mining showed more acidic value (pH 5.76) especially at the back, while those by palm oil plantations are more acidic (pH 6) in the estuary. Organic matter content in sediments affected by coal mines was in the range of 0.61-6.59%, while those affected by oil palm plantations showed higher values (0.12-2.19%). Lead heavy metal content (Pb) in waters affected by coal mines was 0.031-0.056 mg/L, while the area affected by oil palm plantations was of higher value (0.110-0.128 mg/L). Lead (Pb) levels in sediments indicate higher values than waters, which reach 3.512-6.046 mg/Kg (affected by coal mines), and in areas affected by oil palm plantations reaching 6.658-6.66 mg/Kg. The general conclusion is that vegetation densities in areas affected by coal mines are lower than oil palm plantations. The level of lead  (Pb) pollution in the sediments is higher than in the waters.

scholarly journals Fuzzy Algorithm for Power Transformer Diagnostics

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Nitin K. Dhote ◽  
Jagdish B. Helonde
Keyword(s):  
Gas Chromatography ◽  
Fuzzy Inference System ◽  
Fuzzy Inference ◽  
Power Transformer ◽  
Gas Analysis ◽  
Transformer Oil ◽  
Dissolved Gas ◽  
Inference System ◽  
Incipient Faults ◽  
The World

Dissolved gas analysis (DGA) of transformer oil has been one of the most reliable techniques to detect the incipient faults. Many conventional DGA methods have been developed to interpret DGA results obtained from gas chromatography. Although these methods are widely used in the world, they sometimes fail to diagnose, especially when DGA results fall outside conventional methods codes or when more than one fault exist in the transformer. To overcome these limitations, the fuzzy inference system (FIS) is proposed. Two hundred different cases are used to test the accuracy of various DGA methods in interpreting the transformer condition.

Calibration of a gas sampling valve for gas chromatography

1975 ◽  
Vol 47 (2) ◽  
pp. 355-356 ◽  
Author(s):  
John E. Cuddeback ◽  
Shelton R. Birch ◽  
William R. Burg
Keyword(s):  
Gas Chromatography ◽  
Gas Sampling

scholarly journals ANALISIS KESESUAIAN EKOWISATA MANGROVE DESA KAHYAPU PULAU ENGGANO

2016 ◽  
Vol 1 (2) ◽  
pp. 64-73
Author(s):  
Desi Fitriana ◽  
Yar Johan ◽  
Person Pesona Renta
Keyword(s):  
Survey Methods ◽  
Mangrove Ecosystem ◽  
Mangrove Ecosystems ◽  
Suitability Index ◽  
Ecological Suitability ◽  
The Village

The purpose of this study was to identify the potential of mangrove ecosystems as mangrove ecotourism objects and calculate suitability mangrove ecotourism in the village Kahyapu Enggano . This research was conducted using survey methods, measurements in the field and ecological suitability determination based on the multiplication of weights and scores obtained from any of the parameters consisting of five parameters: the thickness of the mangrove , mangrove density , types of mangrove , tidal and biota object . Mangrove ecosystem in the Village Kahyapu Enggano has the potential to be developed as an ecotourism mangrove . Based on the results, the results of IKW ( Travel Suitability Index ) at the stations I 60 % category S2 (Match ) , Station II 66 % category S2 (Match ) and Station III 71 % category S2 (Match ).

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