scholarly journals ANALISA KUALITAS PERAIRAN DITINJAU DARI TINGKAT SAPROBITAS DAN KANDUNGAN KLOROFIL DI MUARA SUNGAI BODRI KENDAL

2018 ◽  
Vol 6 (1) ◽  
pp. 67-76
Author(s):  
Okky Aditya Ramanda ◽  
Bambang Sulardiono ◽  
Churun Ain
Keyword(s):  
Water Quality ◽  
Sampling Method ◽  
High Tide ◽  
River Estuary ◽  
Sampling Location ◽  
Phytoplankton Abundance ◽  
Saprobic Index ◽  
Purposive Sampling ◽  
Repetition Time ◽  
Descriptive Method

ABSTRAK Penelitian ini bertujuan untuk mengetahui nilai saprobitas perairan (SI dan TSI), kandungan klorofil perairan, dan hubungan antara SI, TSI dengan kualitas perairan. Penelitian dilaksanakan pada bulan Agustus 2016 dengan materi yakni sampel air dari Muara Sungai Bodri dan metode deskriptif serta metode pengambilan sampel yakni Purposive Sampling Method. Sampling dilakukan dengan pengulangan waktu yakni pasang dan surut dengan 3 kali pengulangan dengan 4 Stasiun lokasi sampling. Hasil penelitian didapatkan 65 genera dengan 115 spesies yang didominasi oleh Bacillariophyceae seperti Synedra sp., Skeletonema sp., dan Asterionella sp. Kelimpahan fitoplankton tertinggi terjadi pada Stasiun 1 saat surut sebesar  85184 ind/L yang didominasi oleh Synedra ulna. Dari hasil penelitian didapatkan nilai SI pada kisaran 0.75-1.29 yang menyatakan perairan dalam kondisi β-Mesosaprobik hingga β-Mesosaprobik/Oligosaprobik. Sedangkan, untuk TSI didapatkan nilai 0.99-2.56 yang menyatakan perairan dalam kondisi β-Mesosaprobik hingga Oligosaprobik. Hasil pengukuran kadar klorofil-α menunjukkan bahwa klorofil-α pada wilayah di sekitar muara bernilai rendah. Hubungan antara nilai SI dan TSI dengan kualitas perairan menunjukkan nilai positif dengan keeratan lemah pada saat pasang serta nilai positif dan negatif dengan keeratan kuat pada saat surut. Kata Kunci : Muara Sungai Bodri; Klorofil-α; Indeks Saprobik; Tropik Saprobik Indeks ABSTRACT This study aims to determine the value of water saprobity (SI and TSI), chlorophyl-α content and the context of SI, TSI with water quality such as DO, TSS, Nitrate and chlorophyl-α in Bodri River Estuary. This study was conducted in August 2016. The material used in this study is a sample of water taken from Bodri Estuary. The method used in this study is descriptive method with also sampling method is Purposive Sampling. The sampling location consisted by 4 stasions and it done with repetition time of the high and low tide. The result showed 65 genera with 115 species dominated by Bacillariophyceae such as Synedra sp., Skeletonema sp. and Asterionella sp. The highest phytoplankton abundance occurs in Station 1 at low tide at value 85184 ind/L which dominated by Synedra ulna. SI values in the range 0.75-0.29 which states that the water in β-Mesosaprobic to β-Mesosaprobic/Oligosaprobic conditions. While using TSI, it obtained values at range 0.99-2.56 which it states that the water in β-Mesosaprobic to Oligosaprobic conditions. The results of clorophyl-α measurement showed that the chlorophyl-α in the area around the estuary at a low value. The connection between SI and TSI with water quality has a positive value with weak correlaion at high tide and positive and negative value with strong correlation at low tide. Keywords: Bodri River Estuary; Chlorophyl-α; Saprobic Index; Trophic Saprobic Index 

scholarly journals Indeks Pencemaran Muara Sungai Jodoh, Kota Batam

2020 ◽  
Vol 9 (2) ◽  
pp. 119-130
Author(s):  
R. M. Rachmad Rizal Akbar ◽  
Winny Retna Melani ◽  
Tri Apriadi
Keyword(s):  
Water Quality ◽  
Sampling Method ◽  
River Estuary ◽  
Quality Standards ◽  
Coliform Bacteria ◽  
Water Quality Standards ◽  
Purposive Sampling ◽  
Water Quality Status ◽  
Quality Status

ABSTRAK : Penentuan status mutu perairan perlu dilakukan sebagai acuan dalam melakukan pemantauan pencemaran kualitas air. Penelitian ini bertujuan untuk mengetahui tingkat pencemaran melalui nilai Indeks Pencemaran (IP) di perairan Muara Sungai Jodoh, Kota Batam. Lokasi pengambilan sampel berdasarkan metode purposive sampling di tujuh stasiun pada perairan Muara Sungai Jodoh Kelurahan Tanjung Uma Kota Batam. Parameter yang digunakan pada penelitian ini yaitu suhu, TSS, pH, DO, BOD, salinitas, dan bakteri coliform. Sebagai pembanding, digunakan baku mutu air laut untuk biota laut berdasarkan KEPMEN LH No.51 Tahun 2004. Perhitungan nilai IP dilakukan mengacu pada Keputusan Menteri Lingkungan Hidup Nomor 115 Tahun 2003 Tentang Penentuan Status Mutu Air. Berdasarkan hasil penelitian diketahui bahwa perairan muara Sungai Jodoh Kelurahan Tanjung Uma Kota Batam pada saat pasang maupun surut kualitas perairan tergolong tercemar ringan.  ABSTRACT : The determination of water quality status needs to be done as a reference to monitor water pollution. This study aimed to determine the level of pollutions through the level of Index Pollution (IP) in Jodoh River estuary, Tanjung Uma, Batam City . The location of sampling based on purposive sampling method of seven station in the waters of Jodoh River, Tanjung Uma, Batam City. Physical chemichal parameters used in this study were temperature, TSS, pH, DO, BOD, salinity and coliform bacteria. The water quality results were compared with water quality standards based on KEPMEN LH No.51 2004 for marine biotas. IP calculation was reference to the Minister of Environment No.115 2003 concerning on determination of water quality status. Based on the results of this study showed the estuary waters in the Jodoh River, Tanjung Uma, Batam City, when at high and low tide the water quality were slightly polluted.

scholarly journals STRUKTUR KOMUNITAS, KELIMPAHAN FITOPLANKTON, DAN KLOROFIL α DI SUNGAI TUNTANG DEMAK (Community Structure and Abundance of Phytoplankton, Chlorophyll α in Tuntang River Demak)

2018 ◽  
Vol 6 (4) ◽  
pp. 463-469
Author(s):  
Reyhan Fathullah Fauzi ◽  
Bambang Sulardiono ◽  
Niniek Widyorini
Keyword(s):  
Sampling Method ◽  
Environmental Parameters ◽  
Euphotic Zone ◽  
Nutrient Content ◽  
Sampling Location ◽  
Purposive Sampling ◽  
River Waters ◽  
Inorganic Substances ◽  
Aquatic Productivity ◽  
Descriptive Method

Fitoplankton mikroskopik adalah jasad renik yang melayang - layang di permukaan air. Fitoplankton merupakan tumbuhan yang banyak ditemukan di seluruh massa air pada zona eufotik, berukuran mikroskopis dan memiliki klorofil sehingga mampu membentuk zat organik dari zat anorganik melalui fotosintesis. Fitoplankton sebagai organisme autotrof menghasilkan oksigen yang akan  dimanfaatkan oleh organisme lain, sehingga fitoplankton mempunyai peranan penting dalam menunjang produktifitas perairan. Ketersedian fitoplankton suatu perairan dilihat berdasarkan kelimpahan dan klorofil ᾳ yang terjadi dalam perairan tersebut sangat ditentukan oleh keanekaragaman . Penelitian 1. Untuk mengetahui struktur komunitas fitoplankton,, klorofil α d perairan Sungai Tuntang, 2. Mengetahui indeks keanekaragaman, keseragaman dan dominasi fitoplankton di Sungai Tuntang. Penelitian dilaksanakan pada bulan Oktober 2015 di Sungai Tuntang Demak. Materi yang digunakan dalam penelitian adalah Fitoplankton dan Klorofil α . Metode yang digunakan adalah studi kasus, sedangkan pengambilannya Purposive Sampling Method. Sampling dilakukan dengan 3 kali pengulangan di 3 Stasiun lokasi sampling. Hasil penelitian didapatkan : 1. Jenis fitoplankton yang di temukan di Sungai Tuntang terdiri dari kelas  Cyanophyceae, kelas Diatome, kelas Desmidiacae, kelas Chlorophyceae, dan kelimpahan fitoplankton  yaitu  508 – 1261 ind/l, 2. Klorofil α berkisar antara 1,99 – 6,01 mg/m3, 3. Indeks keanekaragaman (H’) berkisar 1,72 – 2,20, indeks keseragaman (e) berkisar 0,53 – 0,69 dan indeks dominasi (c) berkisar 0,19 – 0,34.  Phytoplankton are floating microorganisms on the surface of the water. Phytoplankton is a plant that is frequently found throughout the mass of water in the euphotic zone, microscopic and has chlorophyll to be made of organic substances from inorganic substances through photosynthesis. Phytoplankton used as an autotrophic organism produces oxygen to be utilized by other organisms, so phytoplankton play an important role in supporting aquatic productivity. The existence of phytoplankton can be seen based on its abundance in waters, which is influenced by environmental parameters. This research is aimed to recognise the structure of phytoplankton community, chlorophyll existed in Tuntang waters, and to recognise the nutrient content (N, P) in Tuntang river waters. The research was conducted in October 2015 at Tuntang river,  Demak. The material used in this research is Phytoplankton and Chlorophyll α. The method used in this research is descriptive method and the sampling method is Purposive Sampling Method. Sampling is done by a repeating time that is 3 times repetition at the 3 stations of the sampling location. The results showed 4 genera with 24 species dominated by Diatome such as Nitzchia sp, Thalassiosira sp. The highest abundance of phytoplankton occurred at Station 1 during the 2nd repeat of 403 ind/L dominated by Nitzchia sp. The result of measurement of α-chlorophyll content obtained showed 0.28 - 0.62 mg/l. The highest chlorophyll-α values are at station I of 0.62 and the lowest is at station II of 0.28. This shows that α-chlorophyll around the river is at a low to moderate value.

scholarly journals ANALISIS PERBANDINGAN FITOPLANKTON DAN ZOOPLANKTON SERTA TSI (TROPHIC SAPROBIC INDEX) PADA PERAIRAN TAMBAK DI KAMPUNG TAMBAK LOROK SEMARANG

2018 ◽  
Vol 7 (3) ◽  
pp. 237-245
Author(s):  
Achmad Fuad Suwandana ◽  
Pujiono Wahyu Purnomo ◽  
Siti Rudiyanti
Keyword(s):  
Zooplankton Abundance ◽  
Residential Areas ◽  
Phytoplankton Abundance ◽  
Saprobic Index ◽  
Purposive Sampling ◽  
The Status ◽  
Index Value ◽  
Descriptive Method

Lokasi Tambak Lorok dekat dengan jalan raya, pemukiman penduduk serta pabrik-pabrik besar sehingga berpotensi menampung bahan pencemarnya. Bahan-bahan pencemar tersebut akan mengganggu keseimbangan organisme di dalam tambak salah satunya adalah plankton. Tujuan dari penelitian ini adalah untuk mengetahui kelimpahan fitoplankton dan zooplankton, mengetahui perbandingan fitoplankton dan zooplankton, dan mengetahui status saprobitas. Penelitian ini menggunakan metode deskriptif yang dilaksanakan pada bulan September 2017 di perairan tambak di Kampung Tambak Lorok Semarang. Sampling dilakukan dengan menggunakan purposive sampling pada 4 stasiun dengan masing-masing stasiun 3 titik. Variabel yang diukur adalah kelimpahan fitoplankton, kelimpahan zooplankton, dan nilai saprobitas. Hasil penelitian menunjukkan kelimpahan fitoplankton berkisar antara 47-154 ind/l dan kelimpahan zooplankton berkisar antara 0-9 ind/l. Perbandingan fitoplankton dan zooplankton berkisar antara 7:1 sampai 47:0. Nilai SI (Saprobik Indeks) berkisar antara 1,28-1,33 dan nilai TSI (Tropik Saprobik Indeks) berkisar antara 1,89-2,50. Berdasarkan nilai SI dan TSI dapat diketahui bahwa kondisi tambak di Kampung Tambak Lorok Semarang termasuk ke dalam perairan Oligosaprobik atau perairan belum tercemar sampai tercemar ringan dan sebagian besar dalam status β-Mesosaprobik atau tercemar ringan sampai sedang.  Tambak Lorok Village is located in residential areas-densely populated, not far from highway and large factories which potentially accomodating pollution. They, the pollutants disrupt the balance of organismd in the pond, one of them plankton are going to study is plankton. Purpose of this research is to know the abundance of phytoplankton and zooplankton, the comparison of phytoplankton and zooplankton as well as the status of saprobity. This research was carried out on September 2017 in the pond waters at Tambak Lorok Semarang Village by using descriptive method. Sampling was applied by using purposive at 4 station, each station using 3 point. Measured variables were phytoplankton abundance, zooplankton abundance, and saprobity value. The results showed that phytoplankton abundance ranged between 47-154 ind/l, while zooplankton abundance betweem 0-9 ind/l. Comparison of phytoplankton and zooplankton ranged from 7:1 to 47:0. The SI (Sabrobik Index) value ranged from 1,28-1,33 and the TSI (Tropic Saprobik Index) value ranged from 1,89-2,50. Based on SI dan TSI values mentioned above the condition of ponds in Tambak Lorok Village is classified as Oligosaprobik or uncured waters to minor contaminated and mostly in β-Mesosaprobik status or mild to moderate contamination. 

scholarly journals Jenis Fitoplankton di Perairan Sekitar PLTU Tambak Lorok Semarang

2021 ◽  
Vol 10 (1) ◽  
pp. 123-130
Author(s):  
Clarence Daffa Ananta ◽  
Ria Azizah Tri Nuraini ◽  
Ibnu Pratikto
Keyword(s):  
Power Plant ◽  
Sea Level ◽  
Sampling Method ◽  
Waste Heat ◽  
Steam Power ◽  
Purposive Sampling ◽  
Steam Power Plant ◽  
The Third ◽  
Ocean Environment ◽  
Descriptive Method

Salah satu pemanfaatan lingkungan pesisir dan laut adalah pembangunan Pembangkit Listrik Tenaga Uap (PLTU), karena sistem penyediaan air yang dibutuhkan untuk operasional PLTU berasal dari air laut. Kenaikan suhu permukaan laut akibat adanya aktivitas PLTU akan mempengaruhi organisme pada perairan tersebut, salah satunya adalah fitoplankton. Fitoplankton merupakan organisme autotroph yang mengandung pigmen klorofil sehingga dapat melakukan proses fotosintesis dengan memanfaatkan cahaya matahari. Tujuan penelitian ini adalah untuk mengkaji komposisi dan kelimpahan fitoplankton di perairan sekitar PLTU Tambak Lorok Semarang. Metode yang digunakan dalam penelitian ini adalah metode deskriptif eksploratif, sedangkan dalam pengambilan sampel penelitian, digunakan metode purposive sampling. Hasil kelimpahan fitoplankton secara keseluruhan di Perairan Tambak Lorok, yang tertinggi terdapat pada stasiun 3 dengan jumlah sebesar 4035,7 Ind/L sedangkan pada stasiun 2 dengan jumlah sebesar 2812,7 Ind/L dan kelimpahan terendah terdapat pada stasiun 1 dengan jumlah sebesar 1494,7 Ind/L. Terjadi kenaikan suhu sebesar 5OC dengan nilai suhu mencapai 36,2OC pada stasiun 1 yang memiliki jarak 300 m dari titik outfall, suhu kemudian mengalami penurunan sebesar 3 OC dengan nilai suhu sebesar 33,7OC pada stasiun 2, dan terjadi penurunan pada stasiun 3 hingga nilai suhu sebesar 32,8OC dimana suhu sudah mendekati nilai normal suhu perairan sebesar 31 OC. Dapat disimpulkan bahwa nilai kelimpahan fitoplankton mengalami penurunan seiring dengan meningkatnya kenaikan suhu permukaan laut pada Perairan Tambak Lorok Semarang.One of the utilization of coastal and ocean environment is the development of electric steam power plant since the water required for the operational comes from seawater. The disposal location of the used seawater is in the form of waste heat, streamed into the ocean; therefore it caused the rise of sea-level temperature. The rising sea level temperature will affect the organism on those waters; one of them is phytoplankton. Phytoplankton is an autotroph organism that contains chlorophyll pigment so it can do photosynthesis process using the sunlight. This research aims to study the abundance of phytoplankton in waters around electric steam power plant Tambak Lorok Semarang. The method used in this research is the explorative, descriptive method, while the sampling method is purposive sampling. The highest phytoplankton abudance in Tambak Lorok Waters is located on the third station with 4035,7 Ind/L, while on the second station is 2812,7 Ind/L and the lowest abundance is on the first station with only 1494,7 Ind/L. The increase of sea-level temperature is up to 5OC with the temperature value reached 36,2OC on the first station that located 300 m from the power plant outfall. The temperature then drops 3OC with the value of 33,7OC on the second station. The temperature then drops on the third station with the value of 32,8OC where it’s closed to average sea level temperature, which is 31OC. It can be concluded that the abundance of phytoplankton decreased along with the increase of sea level temperature in Tambak Lorok Waters.

scholarly journals Effect of Silvofishery on Ponds Nutrient Levels (Pengaruh Silvofishery Terhadap Kandungan Nutrien di Tambak)

2014 ◽  
Vol 19 (2) ◽  
pp. 81 ◽  
Author(s):  
Anna Ida Sunaryo Purwiyatno ◽  
Fitri Agustriani
Keyword(s):  
Water Quality ◽  
National Parks ◽  
National Park ◽  
Sampling Method ◽  
Phosphorus Content ◽  
Nutrient Content ◽  
Pond Water ◽  
Quality Parameters ◽  
Mangrove Forests ◽  
Purposive Sampling

Taman Nasional Sembilang merupakan salah satu taman nasional yang terletak di Sumatera Selatan dan menjadi kawasan mangrove terbesar di barat Indonesia. Sebagian besar wilayah mangrovenya telah mengalami alih fungsi menjadi tambak pasang surut. Hal ini menyebabkan timbulnya kekhawatiran kerusakan mangrove di taman nasional. Salah satu upaya untuk mempertahankan wilayah mangrove adalah dengan melakukan sistem silvofishery, yaitu penanaman mangrove dan budidaya bandeng dilakukan secara bersamaan di tambak. Penelitian ini bertujuan untuk menganalisis kualitas air dan kondisi nutrien di tambak di daerah restorasi silvofishery di Taman Nasional Sembilang. Penelitian dilakukan dengan metode purposive sampling di tambak silvofishery, tambak non-silvofishery, dan badan air sungai di seluruh wilayah taman nasional. Pengukuran dilakukan terhadap parameter kualitas air dan kandungan nutrien khususnya nitrat dan fosfat. Hasil penelitian menunjukkan bahwa kehadiran tanaman mangrove di daerah tambak mampu memperbaiki kandungan oksigen dan pH air tambak. Mangrove juga menunjukkan kemampuan dalam mengikat nitrat yang secara tidak langsung akan mencegah air tambak dari polusi. Namun, kandungan fosfat tinggi menunjukkan bahwa tanaman mangrove muda di wilayah restorasi belum mampu mengikat nutrien ini secara signifikan. Hasil penelitian ini menunjukkan bahwa hutan mangrove sangat bermanfaat bagi kegiatan budidaya tambak karena kemampuannya dalam menyerap polutan nutrient. Kata kunci: silvofishery; kolam; nitrat; fosfat; Taman Nasional Sembilang Sembilang National Park is one of the national parks which is located in South Sumatera and became the largest mangrove area in western Indonesia. Most of the mangroves area in this national park has been experiencing conversion to be tidal ponds. This has resulted in concerns on mangrove forest destruction in the park. One of the efforts to maintain mangroves area is by applying silvofishery system, which is mangrove planting and cultivation of milkfish in ponds performed simultaneously. This study aims to investigate the water quality and nutrient condition in the ponds in the area of silvofishery restoration at Sembilang National Park. The study was conducted by purposive sampling method in the silvofishery ponds, non-silvofishery ponds, and river water bodies throughout the park. Measurements conducted on water quality parameters and nutrient content, especially nitrate and phosphate. The results showed that the presence of mangrove in the ponds area is able to improve the oxygen content and pH of pond water. Mangroves also demonstrated the ability to bind nitrates which indirectly will prevent the pond water from pollution. However, the high phosphorus content showed that young mangrove plants in the restoration area have not been able to significantly bind the of this nutrient. The results of this study showed that mangrove forests are very beneficial for aquaculture activities because of its ability to absorb nutrient pollutants. Keywords: silvofishery; ponds; nitrate; phosphate; Sembilang National Park

scholarly journals KESESUAIAN DAN DAYA DUKUNG EKOWISATA MANGROVE DI DESA KURAU DAN DESA KURAU BARAT KABUPATEN BANGKA TENGAH

2019 ◽  
Vol 13 (2) ◽  
pp. 94-104
Author(s):  
Meli Zulia ◽  
Okto Supratman ◽  
Suci Puspita Sari
Keyword(s):  
Carrying Capacity ◽  
Sampling Method ◽  
Secondary Data ◽  
Primary Data ◽  
Purposive Sampling ◽  
Mangrove Ecosystems ◽  
Suitability Index ◽  
Calculation Results ◽  
Index Value ◽  
Descriptive Method

ABSTRACT Mangrove ecosystems are one ecosystem that is vulnerable damaged. Mangrove ecotourism is one of the efforts that can do to reduce damage in the utilization of mangrove ecosystems.This study aims to calculate the suitability and carrying capacity of mangrove ecotourism in the  Kurau Village and West Kurau Village, Central Bangka Regency. This research was conducted in March 2019 at the Mangrove ecotourism area of ​​Kurau Village and West Kurau Village. The study location determined using a purposive sampling method consisting of 3 substations in one location to get primary data and secondary data. Descriptive method was used to analyze the Tourism Suitability Index (IKW) and the Regional Carrying Capacity (DDK). The calculation results show that the mangrove ecotourism area of ​​Kurau Village is included in the suitable category (S2) with a Suitability Index value is 74.36% and the Regional Carrying Capacity (DDK) is 44 people per day (10 hours  / day) and West Kurau Village is included in suitable category (S2) with a Suitability Index value of 74.36% and the Regional Carrying Capacity (DDK) is 55 people per day (10 hours open / day).

scholarly journals ANALISIS PERFORMA BOILER BASUKI BERDASARKAN RASIO ANTARA BAHAN BAKAR DAN STEAM DI PT. INDO ACIDATAMA Tbk.

2019 ◽  
Vol 1 (1) ◽  
pp. 45
Author(s):  
Maedanu Fasola Putra ◽  
Danar Susilo Wijayanto ◽  
Nugroho Agung Pambudi
Keyword(s):  
Fuel Consumption ◽  
Sampling Method ◽  
Heating Value ◽  
Purposive Sampling ◽  
Daily Record ◽  
Quantitative Descriptive ◽  
Descriptive Method ◽  
Steam Production

<p><em>The research aims to investigate the condition of Basuki boiler based on the ratio between fuel consumption and steam production. The research used quantitative-descriptive method. The population of this research was daily record of Basuki boiler. The sample was daily record of Basuki boiler performance for 1 year (February 2015 to January 2016). The sample was taken using purposive sampling method. The research analyzed the ability of fuel to produce a ton (1000 kilograms) of steam. The ability of fuel was depended on the highest heating value (HHV) and water contain in the coal. Based on the result of the research, it can be concluded that Basuki boiler condition based on its ratio between fuel consumption and steam production was good, because the ratio that shown (144.09) was less than the company’s target (150), it meant that the boiler only used 144.09 kilograms of coal to produce a ton of steam. The average of fuel consumption for 1 year was 1,484.99 kg/h and the average of steam production was 10,305.76 kg/h.</em></p>

scholarly journals Keterkaitan antara Kelimpahan Zooplankton dan Parameter Lingkungan di Perairan Pantai Morosari, Kabupaten Demak

2020 ◽  
Vol 9 (2) ◽  
pp. 157-165
Author(s):  
Titik Mariyati ◽  
Hadi Endrawati ◽  
Endang Supriyantini
Keyword(s):  
Water Quality ◽  
Sampling Method ◽  
Diversity Index ◽  
Quality Parameters ◽  
Water Quality Parameters ◽  
Marine Resources ◽  
Water Parameters ◽  
Purposive Sampling ◽  
Relationship Analysis ◽  
Close Relationship

Zooplankton berperan sebagai konsumen tingkat pertama, yaitu memindahkan energi dari produsen ke konsumen tingkat dua. Zooplankton dapat digunakan sebagai bahan kajian untuk mengetahui kualitas dan kesuburan suatu perairan yang sangat diperlukan untuk mendukung pemanfaatan sumberdaya pesisir dan laut. Perairan Morosari mengalami degradasi akibat rob dan berkurangnya tanaman mangrove Penelitian ini bertujuan untuk mengetahui hubungan parameter kualitas air dengan kelimpahan zooplankton di Perairan Pantai Morosari, Demak. Penelitian menggunakan metode survei dan penentuan lokasi dipilih dengan menggunakan metode purposive sampling, analisis data meliputi kelimpahan, indeks keanekaragaman, keseragaman, dominasi dan analisis hubungan. Hasil penelitian menunjukkan bahwa nilai korelasi parameter kualitas air yaitu 0,799 (DO), 0,928 (suhu), 0,758 (salinitas), -0,019 (pH), -0,318 (arus). Berdasarkan hasil pengamatan parameter kualitas air terutama DO, suhu, dan salinitas mempunyai kaitan yang erat terhadap kelimpahan zooplankton di perairan Pantai Morosari. Zooplankton acts as the first level consumer, i.e. transferring energy from producers to second level consumers, zooplankton can be used as study material to find out the quality and fertility of water that is needed to support the use of coastal and marine resources. This study aims to determine the abundance of zooplankton, the types of zooplankton and the relation of water quality parameters with the abundance of zooplankton in Morosari Coastal Water, Demak. Research using methods of surveying and determining the location was chosen using the purposive sampling method, data analysis includes abundance, diversity index, uniformity, dominance, and relationship analysis. The results showed that correlation value between water parameters and abundance of zooplankton is 0,799 (DO), 0,928 (temperature), 0,758 (salinity), -0,019 (pH), -0,138 (current). Based on the results of the water quality parameters, especially DO, temperature, and salinity have a close relationship to the abundance of zooplankton in the waters of Morosari Beach.

scholarly journals PENGARUH PEMBIAYAAN MUDHARABAH, MUSYARAKAH, MURABAHAH, DAN IJARAH TERHADAP PROFITABILITAS 4 BANK UMUM SYARIAH PERIODE 2013-2016

2018 ◽  
Vol 14 (2) ◽  
pp. 140-150
Author(s):  
Purnama Putra
Keyword(s):  
Sampling Method ◽  
Research Result ◽  
Secondary Data ◽  
Significant Positive Effect ◽  
Financial Reports ◽  
Purposive Sampling ◽  
Negative Effect ◽  
Quantitative Descriptive ◽  
Positive Effect ◽  
Descriptive Method

This research employ quantitative descriptive method aimed at testing the effects of Mudharabah, Musyarakah, Murabahah, and Ijarah Financings simultaneously and partially on the profitability of Sharia Banks in 2013-2016. This research uses secondary data taken from financial reports of Sharia Banks (Bank Umum Syariah/BUS) registered at the Bank of Indonesia. The data is analyzed using multiple linear regression. Four Sharia Banks were used as samples in this study which provide financial reports per three months. They are chosen using purposive sampling method. From the research result, it can be inferred that mudharabah financing does not have significant effect, musyarakah financing has significant negative effect, while murabahah and ijarah financings have significant positive effect by partially on profitability. Whereas simultaneously have positive significant to profitability. Penelitian ini bertujuan untuk mengetahui pengaruh pembiayaan mudharabah, musyarakah, murabahah, dan ijarah terhadap profitabilitas Bank Umum Syariah yang terdaftar di Bank Indonesia Periode 2013-2016. Data yang digunakan adalah laporan keuangan Bank Umum Syariah (BUS) yang terdaftar di Bank Indonesia. Data dianalisis menggunakan regresi linear berganda. Sampel dalam penelitian ini sebanyak 4 Bank Umum Syariah, yang menyediakan laporan keuangan per triwulan. Sampel diambil menggunakan teknik pengambilan purposive sampling. Hasil dari penelitian ini menunjukkan secara parsial bahwa pembiayaan mudharabah tidak berpengaruh, pembiayaan musyarakah berpengaruh negatif signifikan, pembiayaan murabahah berpengaruh positif signifikan, pembiayaan ijarah berpengaruh positif signifikan terhadap profitabilitas ROE. Sedangkan secara simultan pembiayaan mudharabah, musyarakah, murabahah dan ijarah berpengaruh positif signifikan terhadap profitabilitas.

scholarly journals SEBARAN SPASIO TEMPORAL KELIMPAHAN FITOPLANKTON DAN KLOROFIL-A DI PERAIRAN UJUNG KARTINI JEPARA (Spatial and Temporal Distribution Abundance of Phytoplankton and Chlorophyll-a in Ujung Kartini Waters Jepara)

2018 ◽  
Vol 14 (1) ◽  
pp. 1
Author(s):  
Muchtar Yulianto ◽  
Max Rudolf Muskananfola ◽  
Arif Rahman
Keyword(s):  
Chlorophyll A ◽  
Descriptive Analysis ◽  
High Tide ◽  
Temporal Distribution ◽  
Nutrient Content ◽  
Sampling Location ◽  
Purposive Sampling ◽  
Aquatic Productivity ◽  
High Level

Perairan Ujung Kartini merupakan perairan yang menjadi muara dari Sungai Wiso dan Sungai Kanal yang terletak di sisi barat Kabupaten Jepara. Di sekitar Perairan Ujung Kartini terdapat kegiatan manusia yang dikhawatirkan dapat menyebabkan perubahan kualitas air terutama kandungan unsur hara. Perubahan kandungan unsur di perairan akan berdampak terhadap persebaran dan kelimpahan fitoplankton serta konsentrasi klorofil-a. Penelitian ini bertujuan untuk mengetahui tingkat kesuburan perairan dan hubungan antara kelimpahan fitoplankton dengan konsentrasi klorofil-a. Penelitian dilakukan pada bulan November dan Desember 2017. Penelitian ini termasuk jenis penelitian analisis deskriptif dan penentuan lokasi sampling menggunakan metode purposive sampling. Pengambilan sampel air dan fitoplankton dilakukan di tiga stasiun yang ditentukan berdasarkan tinggi rendahnya kegiatan manusia. Pengambilan sampel tersebut dilakukan pada saat kondisi pasang dan surut dengan dua kali pengulangan. Hasil penelitian yang diperoleh menunjukan bahwa kelimpahan fitoplankton pada saat pasang dan surut berkisar antara 6.375 – 13.725 sel/l dan konsentrasi klorofil-a pada saat pasang dan surut berkisar antara 0,126 – 1,392 mg/m3. Nilai diatom quotient sebesar 1,533 yang berarti perairan yang diteliti termasuk ke dalam kategori perairan eutrofik. Kelimpahan fitoplankton dan konsentrasi klorofil-a pada saat pasang lebih tinggi daripada saat surut. Keduanya mempunyai hubungan yang sangat erat. Ujung Kartini Waters is part of the estuary of the Wiso River and Kanal River which are located on the west side of Jepara Regency. In the surrounding area, there are human activities that are feared to cause changes in water quality, especially nutrient content. Changes in nutrients content in the waters will have impact on the distribution and abundance of phytoplankton and concentration of chlorophyll-a.  This study aims to determine the level of aquatic productivity and the relationship between phytoplankton abundance with chlorophyll-a concentration. The study was conducted from November to December 2017. This research includes descriptive analysis and determination of sampling location using purposive sampling method. Samples of water and phytoplankton were collected at three stations based on the level of human activity. Sampling was carried out during high tide and low tide with two repetitions. Based on the results of the research, the abundance of phytoplankton at high and low tides ranged between 6.375 - 13.725 cells/l and chlorophyll-a concentrations at high and low tides ranged between 0,126 – 1,392 mg/m3. The value of diatom quotient is 1,533 which means that the waters of study area belong to the eutrophic category. The abundance of phytoplankton and concentrations of chlorophyll-a at high tide is higher than at low tide. Both show a high level relationship.

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