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Ahmad Mutadi
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STRUKTUR DAN KOMPOSISI VEGETASI MANGROVE DI DUSUN II DESA PULAU SEMBILAN KECAMATAN PANGKALAN SUSU KABUPATEN LANGKAT SUMATERA UTARA Yolanda Rizwany; Yunasfi Yunasfi; Ahmad Mutadi
AQUACOASTMARINE Vol 4, No 3 (2016): JURNAL AQUACOASTMARINE
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Pertanian Universitas Sumatera Utara

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Abstract

Mangrove forest ecosystem is a type of forest that are mostly located along the coast or a river that survival is affected by the tide. Ecosystems mangrove in village II of sembilan island has long used surrounding peoples for land aquaculture and firewood. This research aims to determine the structure and composition of mangrove vegetation, water quality, soil pH conditions and the substrate. This research is done in March 2016 till May 2016. The research was conducted sampling analysis of vegetation transect method. Mangrove species found in the research is 27 species of 12 families. Mangrove density value at station I 4700 ind/ha, station II 4767 ind/ha, station III 4067 ind/ha, station IV 4800 ind/ha, station V 3667 ind/ha. Based on living environment minister No. 201/2004, the density of mangrove in village II of Sembilan Island included in the category of very dense (both categories). The quality of physical and chemical water, for the parameters temperature range of 29-30°C, the current velocity 0,045-0,017 m/s, pH of the water 7.03-7.33, salinity 24-26o/oo and soil pH 6,59-7,21. The value is still quite ideal (optimum) for mangrove growth. Mangrove substrate types in this research is loam, clay, sandy clay loam, and sandy clay.Key Words : Mangrove, Sembilan island, Substrate, Water quality
SRUKTUR KOMUNITAS MAKROZOOBENTHOS DI DUSUN II DESAPULAU SEMBILAN KECAMATAN PANGKALAN SUSUKABUPATEN LANGKATPROVINSI SUMATERA UTARA Nurul Andrifa Nasution; Yunasfi Djayus; Ahmad Mutadi
AQUACOASTMARINE Vol 4, No 4 (2016): AQUACOASTMARINE
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Pertanian Universitas Sumatera Utara

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Abstract

Macrozoobenthos is very well being use as indicator to have the change of territorial of water quallity because of nature of benthos which is quite of having the low mobillity so that getting many influences by environment. This reaserch aim’s to knowing the condition of Sembilan Island. This research is done in Maret to April 2016. The study used purposive random sampling method by taking and observation of density of molluscs and measurement of water quality parameters. Data analysis included analysis of Molluscs, analysis of water quality and analysis of the substrate. Found 9 species of Molluscs at the research site are Nerita balteata has the highest composition of 32%. Chicoreuscapucinus 25%, Cerithidea cingulata 24%, Littorina melanostoma 7%, Littorina scabra 4%, Cerithidea obtusa and Telescopium telescopium have the same compsition that is equal to 3%. Nassarius dorsatus 2% and Pugilina cochilidium 0%. The diversity index (H+) is about 1,20 – 1,54. The equitability is about 0,42 – 0,48. The index of dominance is about 0,26 - 0,39.Keywords: diversity, Molluscs, Sembilan Island.
HUBUNGAN KERAPATAN MANGROVE TERHADAP LAJU SEDIMEN TRANSPOR DI WILAYAH PESISIR DESA PULAU SEMBILAN KABUPATEN LANGKAT SUMATERA UTARA Rudi Hasonangan Siregar; Yunasfi Djayus; Ahmad Mutadi
AQUACOASTMARINE Vol 4, No 4 (2016): AQUACOASTMARINE
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Pertanian Universitas Sumatera Utara

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Abstract

Mangrove forests in coastal areas physically serves as a barrier of mud and sediment trap. Mangrove are often utilized by people aquaculture activities by means of mangrove forest logging and timber extraction as building materials and firewood, thereby reducing the catch mangrove roots as sediment traps. The purpose of this study was to determine in fluence of mangrove density on the sediment transfort rate in Coastal Pulau Sembilan Village. The research was conducted for two months from March to April 2014 in Coastal Pulau Sembilan Village. The method used is the method of transects and sediment trap method. The results of this study is the highest density of mangrove are found at statiun 4 with a value of 4930 stands/ha and lowest were in station 5 with a value 3662 stands/ha and categorized good. Relationship between the mangrove density and sedimen transfort rate exhibits a negative correlation with a value of -1 this means that sediment rate will be lower when mangrove density higher and vice versa.Key Word : Mangrove Density, Transect Method, Sediment Traps Method, Sediment .Transfort Rate.
DEKOMPOSISI SERASAH DAUN Rhizophora apiculata DAN KONTRIBUSI TERHADAP UNSUR HARA DI PERAIRAN PULAU SEMBILAN KECAMATAN PANGKALAN SUSU KABUPATEN LANGKAT M. Ridho Santoso; Yunasfi Djayus; Ahmad Mutadi
AQUACOASTMARINE Vol 4, No 4 (2016): AQUACOASTMARINE
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Pertanian Universitas Sumatera Utara

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Abstract

The mangrove litter which has been decomposed contributes organic matter as source of nutrients, mangrove and natural food source for many species of fish and other organisms in the mangrove ecosystem. The purpose of this research is to know the decomposition of R. apiculata leaf litter and to know the nutrient content of carbon (C), nitrogen (N) and phosphorus (P) in the R. apiculata leaf litter which been released during the decomposition time. This research was done at the waters of the Pulau Sembilan Districs Langkat District Pangkalan Susu, North Sumatra Province during March until June 2016. This research used purposive sampling method at three stations and the determination of the station is done by seeing the availability of R. apiculata at the waters of the Pulau Sembilan. The results showed that the decomposition of R. apiculata litter leaf on day 75 are 8,53 in stasiun I, 8,58 in station II and 10,18 in III station. The fastest decomposition is the station I with 10,18 and the slowest decomposition is the station I with 8,53. The nutrient of carbon during decomposition in 75 days are 17,41% at station I, 15,84% at station II and 17,41 % at station III. Nutrient of nitrogen which beendecomposed on day 75 are 0,98% in station I, 1,18 % in station II and 1,18 % in station III. Nutrient of phosphorus during decomposition in 75 days are 0,08% in station I, 0,09 % in station II and 0,10 % in station III.Keywords : Decomposition, Pulau Sembilan, R. apiculata. nutrient.
STRUKTUR KOMUNITAS MAKROZOOBENTHOS DI KAWASAN MANGROVE DESA BAGAN DELI KECAMATANMEDAN BELAWAN (Structure of Macrozoobenthos Community on Mangrove in Bagan Deli Village, Medan Belawan district) Tri Wulandari; Hesti Wahyuningsih; Ahmad Mutadi
AQUACOASTMARINE Vol 4, No 4 (2016): AQUACOASTMARINE
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Pertanian Universitas Sumatera Utara

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Abstract

Activitieson mangrove areas Bagan Deli Village, Medan Belawan district resulted inwater quality decrease, causing changes in ecological condition of the biota, especiallymacrozoobenthos. This research aims to determine the community structure of macrozoobenthosand water quality based on Abundance and Comparison (ABC) curve. This research was conductedin the mangrove area of the village of Bagan Deli Medan District Belawan from March until April2016. It was done by using purposive random sampling method on three stations. The samplingmacrozoobenthos and watter quality measurement was done and a half month. There were 13species of macrozoobenthoswhich found, namely Telescopium telescopium, Turritella terebra,Nassarius reeveanus, Cerithide acingulata, Chicoreus capucinus, Nerita lineata, Cerithidea obtusa,Littoraria melanostoma, Cassidula aurisfelis, Natica Tigrina, Uca vocans and Uca rosea. Thehighest density is worth 900 ind/dm2. Diversity index was ranged from 1,79 to 2,09 which is in highrated level. Uniformity index was ranged from 0,7 to 0,82 and dominance index was ranged from0,15 to 0,2. The conditional of mangrove area in Bagan Deli village is in the medium pollutedcategory based on the ABC curve.Keywords : ABC curve, Community Structure, Macrozoobenthos, Pollution Levels
Penentuan Kualitas Air di Danau Kelapa Gading Kelurahan Kisaran Naga Kabupaten Asahan Provinsi Sumatera Utara Nathasya Zaharuddin; Hesti Wahyuningsih; Ahmad Mutadi
AQUACOASTMARINE Vol 4, No 4 (2016): AQUACOASTMARINE
Publisher : Program Studi Manajemen Sumberdaya Perairan, Fakultas Pertanian Universitas Sumatera Utara

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Abstract

Lake Kelapa Gading is an artificial lake located in Kisaran Naga district, Asahan. Through the time, Lake Kelapa Gading has been used not only as a rain shelter, but also as a tourism place and floating fish cage. The purpose of this study was to determine the status of water quality of Lake Kelapa Gading. This research used Purposive Random Sampling method by selecting five activity-based-stations on Lake Kelapa Gading. Data were analyzed by using Storet Method and Pollution Index. Water sampling is done by using a modified Van Dorn Water Sampler. The measured parameters were Physics (temperature, TSS, Brightness and conductivity), Chemistry (DO, pH, BOD, COD, Nitrate and Phosphate) and Biology (total coliform). The result of water quality status using Storet Method, based on standard class II and III, scored -30 and -7 of each. The status of water quality using pollution index method, based on class II and III, scored 2.75 and 1.53 of each. Based on the Storet Method, the status of water quality of Lake Kelapa Gading was medium-polluted, while based on the pollution index, it was low-polluted.Keywords : Kisaran, Lake, Pollution, Water Quality.
Co-Authors Hesti Wahyuningsih M. Ridho Santoso Nathasya Zaharuddin Nurul Andrifa Nasution Rudi Hasonangan Siregar TRI WULANDARI Yolanda Rizwany Yunasfi Djayus Yunasfi Yunasfi