scholarly journals ANALYSIS OF NITRATE, PHOSPHATE, AND SILICATE CONTENT AND THEIR EFFECTS ON PLANKTONIC ABUNDANCE IN THE ESTUARY WATERS OF BATANG ARAU OR PADANG CITY WEST SUMATRA PROVINCE

2021 ◽  
Vol 4 (1) ◽  
pp. 1-12
Author(s):  
Weni Indah Wahyuni ◽  
Bintal Amin ◽  
Sofyan Husein Siregar
Keyword(s):  
Anthropogenic Activities ◽  
Negative Relationship ◽  
Aquatic Organisms ◽  
Household Waste ◽  
Survey Method ◽  
Nitrate Content ◽  
Sampling Station ◽  
Silicate Content ◽  
Diatom Abundance ◽  
West Sumatra

The entry of nutrients (nitrate, phosphate and silicate) from land-based anthropogenic activities (industry, agriculture and household waste) through rivers can potentially cause changes in water quality and will affect fertility and aquatic organisms such as phytoplankton. These three nutrients play an important role in the living tissue cells of living organisms and in the photosynthesis process. This study aims to analyze the effect of nitrate, phosphate and silicate content on the plankton abundance in the estuary of the Batang Arau River, Padang, West Sumatra. The method used is a survey method, the determination of the sampling station is done by purposive sampling, data were analysed by Excel and SPSS Software. Based on the results of laboratory analysis, the nitrate content ranged from 0,117 to 0,485 mg/l, phosphate content from 0,239 to 0,704 mg/l, and  silicate content from 0,031 to 0,685 mg/l. Planktonic diatom abundance in the estuary of the Batang Arau River ranges from 194 to 750 ind/l. The results of the statistical analysis of the effect of nitrate, phosphate and silicate with an abundance of diatoms are expressed by the equation Y = 743,019 - 481,828Nitrate - 199,552Phosphate - 172,971Silicate. This equation explains that the effect of nitrate, phosphate and silicate content on diatom abundance has an inverse or negative relationship, where nitrate, phosphate and silicate levels increase, the diatom abundance will decrease. The difference of content and the relationship between parameters analyzed in this research are discussed.

scholarly journals ANALYSIS OF METAL Pb AND Cu CONTENT IN SEAGRASS (Sargassum sp) IN BAYUR BAYS OF WEST SUMATERA PROVINCE

2021 ◽  
Vol 4 (1) ◽  
pp. 36-43
Author(s):  
Yuliza Fitri ◽  
Yusni Ikhwan Siregar ◽  
Bintal Amin
Keyword(s):  
Water Quality ◽  
Heavy Metal ◽  
Metal Pollution ◽  
Heavy Metal Pollution ◽  
Anthropogenic Activities ◽  
Survey Method ◽  
Cu Content ◽  
Port Area ◽  
Sea Transportation ◽  
West Sumatra

Located in Teluk Bayur bay the port is of the five biggest and busiest ports in Indonesia. High sea transportation activities and anthropogenic activities may lead to heavy metal pollution. The purpose of this study was to determine the concentration of Pb and Cu metals, in seagrass (Sargassum sp.) and to analyze the feasibility of consuming Sargassum sp. The method used in this study is a survey method, by analyzing heavy metal at Laboratory Pekerjaan Umum of Riau Province. The water quality temperatures 30-31oC, and salinity of 30-31 ppt, appeared curred velocity 0.06-0.08 m/sec, water transparency 100% with a depth of ± 1 m and pH 7. Pb concentrations the highest is 2.9367 μg/g at stations close to the port and the lowest is 2.2506 μg/g at stations close to tourist areas, and the concentration of Cu metal shows the highest 3.3850 μg/g at stations close to community settlements, and the lowest is 2.7772 μg/g near the port area of ​​Teluk Bayur. Based on the PTWI value, Sargassum sp. those originating from the waters of Teluk Bayur, West Sumatra, are still safe for consumption. Based on the Anova Pb and Cu tests in Sargassum sp. do not different (p> 0.05).

scholarly journals CONTENTS OF NITRATES, PHOSPHATES, SILICATES AND MISTAKES DIATOMS (Epiphytic) IN SEAGRASSES (Thalassia hemprichii) WATERS NIRWANA BEACH KECAMATAN TELUK NIBUNG KOTA PADANG SUMATERA BARAT PROVINCE

2020 ◽  
Vol 2 (1) ◽  
pp. 39-48
Author(s):  
Sakinah Rachmadani Rambe ◽  
Irvina Nurachmi ◽  
Syahril Nedi
Keyword(s):  
Growth And Development ◽  
Survey Method ◽  
Total Abundance ◽  
Thalassia Hemprichii ◽  
Silicate Content ◽  
Epiphytic Diatoms ◽  
West Sumatra ◽  
Diatom Genus ◽  
Relationship Of ◽  
The Relationship

Epiphytic diatoms are diatoms whose lives are associated with plants, one of which is seagrass. Nitrates, phosphates and silicates are needed to support growth and development, especially epiphytic which attaches to seagrass leaves. The research was conducted in May 2018 in the waters of Nirwana Beach, Teluk Nibung Subdistrict, Padang City, West Sumatra Province. The aim of this study was to determine the relationship of nitrate, phosphate, and silicate content to the abundance of diatoms. The method used in this study is the survey method. Taking diatom samples is done by grinding the surface of seagrass leaves using a brush, while sampling nitrates, phosphates and silicates is done using a water sampler. The results of this study indicate that nitrate concentrations ranged from 1,250-1,255 mg / l, phosphate 0,031-0,570 mg / l and silicate 1,180-1,700 mg/l. The total abundance of diatoms ranges from 459-3446 ind / cm2, where the diatom genus that dominates at each station is Navicula, Isthmia, and Stephanopyxis. Based on statistical analysis shows that the content of nitrate, phosphate, and silicate has a positive relationship to the abundance of epiphytic diatoms.

scholarly journals The Relation of Nitrate and Phosphate to Phytoplankton Abundance in the Upstream Citarum River, West Java, Indonesia

2021 ◽  
pp. 21-31
Author(s):  
Kristina Marsela ◽  
Herman Hamdani ◽  
Zuzy Anna ◽  
Heti Herawati
Keyword(s):  
Water Quality ◽  
Diversity Index ◽  
Anthropogenic Activities ◽  
Sampling Technique ◽  
Survey Method ◽  
Nitrate Content ◽  
Phosphate Content ◽  
Phytoplankton Abundance ◽  
Dominance Index ◽  
West Java

Citarum River is the longest river in West Java Province, it is utilized for various anthropogenic activities that will affect the water quality, ecological state, and parameters of nitrates and phosphates in the waters of Citarum River. Nitrate and phosphate content can affect Phytoplankton abundance. Phytoplankton is a bioindicator to determine water quality. The purpose of this study is to determine the association of nitrates and phosphates with the abundance of phytoplankton and determine the quality of water in the Citarum River. The study began in August 2020 until September 2020. The research uses a survey method with a purposive sampling technique. Sampling was carried out at 5 stations with 5 times repetitions every 7 days. The water parameter analyzed are transparency, temperature, current, pH, DO, BOD, PO42-,NO3-, Phytoplankton abundance, diversity index, and dominance index. Results showed that phytoplankton in the citarum river there were 24 genera divided into 4 phylum. Diversity index during the study reached between 0,91 – 0,99 and dominance index was in the range 0,01 – 0,2. Phytoplankton abundance ranges from 11 to 1292 ind/L. The highest genera phytoplankton composition at each station was found is Synedra as much as 1087 ind/ L. Nitrate content ranges from 0.13 - 0.33 mg/l and phosphate content range from 0.13 - 0.29 mg/l. The acquisition of R square value based on the simultaneous analysis of the relationship between nitrate and phosphate and the abundance of phytoplankton was 43,9% and 56,1% was influenced by other several factor namely temperature, water transparency, nutrient, and water flow.

scholarly journals ANALYSIS CONCENTRATION OF SURFACTANT ANIONIC AND THE RELATION WITH DIATOM ABUNDANCE IN BUNGUS WATER, PADANG WEST SUMATERA

2020 ◽  
Vol 3 (1) ◽  
pp. 1-10
Author(s):  
Rukiana ◽  
Syahril Nedi ◽  
Irvina Nurachmi
Keyword(s):  
Water Quality ◽  
Linear Regression ◽  
Laboratory Test ◽  
Multiple Linear Regression ◽  
Correlation Coefficient ◽  
Quality Parameters ◽  
Water Quality Parameters ◽  
Survey Method ◽  
Sampling Station ◽  
Diatom Abundance

This research aims to analyze  surfactant anionic concentration and diatom abundance that has been implemented at May 2018 in Bungus rivers, Padang.  This Research were conducted in survey method, four station were eshtablished with three replication of each sampling station. Analysis of surfactant anionic and diatom content was done at Chemistry Oceanography Laboratory and diatom identification was performed at Biology Oceanography Laboratory. The results showed that surfactant content in the waters ranged from 0,309-0,773 ppm and diatom abundance based on laboratory test on ranged 40,7407-81,4815 Ind/l. The correlation of surfactant and diatom content in waters by using linear regression y = Y = 94.56 -66.8x with correlation coefficient r = 0,809 and correlation  water quality parameters with diatom abundance by using multiple linear regression Y= 787,189 -238,828X1 -9,032X2 -6,185X3 +5,371X4 +303,081X5 -35,631X6 with determination regression 0,995 and correlation coefficient r = 0,997.

scholarly journals PERANAN TATA GUNA LAHAN BAGIAN HULU TERHADAP KESUBURAN PERAIRAN PADA WADUK JATIBARANG, SEMARANG

2018 ◽  
Vol 7 (1) ◽  
pp. 39-48
Author(s):  
Yohana T. E. Silitonga ◽  
Bambang Sulardiono ◽  
Pujiono Wahyu Purnomo
Keyword(s):  
Land Use ◽  
Rice Field ◽  
Household Waste ◽  
Survey Method ◽  
Nitrate Content ◽  
Eutrophic Water ◽  
Negative Effect ◽  
Chemical Character ◽  
City Construction ◽  
Physical And Chemical

Kota Semarang dikenal sebagai kota yang sering mengalami banjir. Pembangunan Waduk Jatibarang merupakan salah satu cara untuk mengatasi permasalahan banjir di kota Semarang. Tata guna lahan adalah sebuah pemanfaatan lahan dan penataan lahan yang dilakukan sesuai dengan kondisi eksisting alam. Kegiatan manusia dan penggunaan kawasan yang tidak terkendali memberikan pengaruh negatif yang berpotensi menyumbang limbah rumah tangga dan mempengaruhi tingkat kesuburan perairan Waduk Jatibarang. Tujuan penelitian ini adalah untuk mengidentifikasi tata guna lahan bagian hulu di sekitar Waduk Jatibarang dan mengetahui tingkat kesuburan perairan Waduk Jatibarang. Metode yang digunakan adalah metode survey. Penelitian dilaksanakan pada tanggal 15 - 27 September 2017. Penelitian ini dilakukan pada 6 titik sampling di Waduk Jatibarang. Hasil penelitian menunjukkan bahwa lahan bagian hulu Waduk Jatibarang terdiri dari 50 % vegetasi, 20% pemukiman, 25% persawahan,dan 5% tegalan. Karakter fisika dan kimia perairan Waduk Jatibarang tergolong baik. Kandungan DO antara 4,80 – 6,96 mg/l, kandungan nitrat antara 0,64 – 1,10 ppm, total fosfat antara 0,13 – 0,26 ppm, dan klorofil-a antara 2,72 – 4,29 ppm. Indeks TSI Carlson berkisar antara 52,57 – 55,36 menunjukkan status kesuburan perairan eutrofik ringan.  Semarang City is known as flooded city. Construction of Jatibarang Reservoir is a solution to solve the flood problem in Semarang city. Land use is a utilization land and land arrangement in accordance of the nature existantion condition. Human activities nearby the waters can lead to the entry of various substances into the aquatic system. Uncontrolled use of the area has a negative effect that potentially contributes to household waste and affect the water thropic level. The purpose of this study is to identify the upstream of land use in Jatibarang Reservoir and to know Water Thropic State at Jatibarang Reservoir. Research reference is using survey method. The research was conducted on 15 – 27  September 2017. This research was conducted on six sampling points, the scope of land studied by upstream area in Jatibarang Reservoir with percentage of 50% vegetation, 20% settlement, 25% rice field, and 5% moor. Physical and chemical character of Waters of Jatibarang Reservoir are good. DO content between 4,80 - 6,96 mg / l, nitrate content between 0,64 - 1,10 ppm, total phosphate between 0,1305 - 0,2695 ppm , and chlorophyll-a between 2,72 – 4,29 ppm. The Carlson TSI index ranged from 52,57 to 55,93 indicates the mild eutrophic water thropic state.

The Relationship Among Job Satisfaction, Oreganizational Commitiment and Employees’ Turnover at Unilever Corporation in Nigeria

2017 ◽  
Vol 5 (1) ◽  
pp. 370
Author(s):  
Chiemeke Kingsley Chiedu ◽  
Choi Sang Long ◽  
Hapriza BT Ashar
Keyword(s):  
Job Satisfaction ◽  
Organizational Commitment ◽  
Organizational Performance ◽  
Employee Turnover ◽  
Turnover Intentions ◽  
Pearson Correlation ◽  
Negative Relationship ◽  
Survey Method ◽  
Employee Turnover Intentions ◽  
The Relationship

Employee turnover has become a key performance indicator for many organizations as they struggle to retain talented employees. The negative impact of turnover on organizational performance has continually forced organizational leaders to seek better ways of retaining valuable employees. The relationship between man and work has always attracted the attention of philosophers. A major part of men’s life is spent at work. Work is social reality and social expectation to which men seem to conform. It not only provides status to the individual but also binds him to the society. An employee who is satisfied with his job would perform his duties well and be committed to his job, and subsequently to his organization. This paper examines relationship among job satisfaction, organizational commitment and employees’ turnover intentions at Unilever Corporation in Nigeria. The data for this study was collected from 117 employees currently working at Unilever Nigeria PLC using the survey method via the questionnaire. Pearson Correlation and the multiple regression analysis techniques using the SPSS version 22.0 was used for the data analysis. The findings of the study revealed that both job satisfaction and organizational commitment have significant negative relationship with employee turnover intentions. In addition, organizational commitment was revealed to have a more dorminant influence on employee turnover intentions than job satisfaction. Based on these findings, the implications, recommendations, practice, and theory were discussed.

scholarly journals The Role of Aquatic Ecosystems (River Tua, Portugal) as Reservoirs of Multidrug-Resistant Aeromonas spp.

Water ◽  
2021 ◽  
Vol 13 (5) ◽  
pp. 698
Author(s):  
Sónia Gomes ◽  
Conceição Fernandes ◽  
Sandra Monteiro ◽  
Edna Cabecinha ◽  
Amílcar Teixeira ◽  
...  
Keyword(s):  
Antibiotic Resistance ◽  
Antimicrobial Resistance ◽  
Nalidixic Acid ◽  
Water Samples ◽  
Aquatic Ecosystems ◽  
Anthropogenic Activities ◽  
Aquatic Organisms ◽  
Resistant Bacteria ◽  
Anthropogenic Pressures ◽  
Resistance Rates

The inappropriate use of antibiotics, one of the causes of the high incidence of antimicrobial-resistant bacteria isolated from aquatic ecosystems, represents a risk for aquatic organisms and the welfare of humans. This study aimed to determine the antimicrobial resistance rates among riverine Aeromonas spp., taken as representative of the autochthonous microbiota, to evaluate the level of antibacterial resistance in the Tua River (Douro basin). The prevalence and degree of antibiotic resistance was examined using motile aeromonads as a potential indicator of antimicrobial susceptibility for the aquatic environment. Water samples were collected from the middle sector of the river, which is most impacted area by several anthropogenic pressures. Water samples were plated on an Aeromonas-selective agar, with and without antibiotics. The activity of 19 antibiotics was studied against 30 isolates of Aeromonas spp. using the standard agar dilution susceptibility test. Antibiotic resistance rates were fosfomycin (FOS) 83.33%, nalidixic acid (NA) 60%, cefotaxime (CTX) 40%, gentamicin (CN) 26.67%, tobramycin (TOB) 26.67%, cotrimoxazole (SXT) 26.67%, chloramphenicol (C) 16.67%, and tetracycline (TE) 13.33%. Some of the nalidixic acid-resistant strains were susceptible to fluoroquinolones. Multiple resistance was also observed (83.33%). The environmental ubiquity, the natural susceptibility to antimicrobials and the zoonotic potential of Aeromonas spp. make them optimal candidates for studying antimicrobial resistance (AMR) in aquatic ecosystems. Aquatic environments may provide an ideal setting for the acquisition and dissemination of antibiotic resistance because anthropogenic activities frequently impact them. The potential risk of multi- and pan-resistant bacteria transmission between animals and humans should be considered in a “One Health—One World” concept.

Analisis Indikator Makro Ekonomi Terhadap Tingkat Kemiskinan di Provinsi Sumatera Barat

2021 ◽  
Vol 5 (1) ◽  
pp. 1-7
Author(s):  
Cempaka Rizki Ambar Sari ◽  
Dela Resina ◽  
Neng Kamarni
Keyword(s):  
Economic Growth ◽  
Negative Relationship ◽  
Poverty Rate ◽  
Variable Rate ◽  
Poverty Level ◽  
Economic Growth Rate ◽  
West Sumatra ◽  
Macroeconomic Indicators ◽  
Interesting Discussion

Poverty is a problem of economic development which is always an interesting discussion. Poverty has an impact on socio-economic burdens, increases in crime, decreases the quality of life, and hinders the creation of superior human resources. The objectives of this study were to 1) analyze the concept and development of poverty in West Sumatra Province; and 2) to analyze the effect of macroeconomic indicators on poverty in West Sumatra Province. The macroeconomic indicators used are Economic Growth Rate based on Gross Regional Domestic Product (GRDP) and Human Development Index (HDI). The analytical tool used is multiple linear regression which includes data from 19 districts and cities in West Sumatra Province during the period 2015-2019. From the results of this study, it was found that in general the poverty rate in West Sumatra Province from 2015-2019 continued to decline. The variable rate of economic growth has a positive relationship with the level of poverty in West Sumatra Province. Meanwhile, the HDI variable has a significant effect on the poverty level and has a negative relationship.

scholarly journals Lake water dissolved inorganic carbon dynamics revealed from monthly measurements of radiocarbon in the Fuji Five Lakes, Japan

Elem Sci Anth ◽  
2021 ◽  
Vol 9 (1) ◽  
Author(s):  
Kosuke Ota ◽  
Yusuke Yokoyama ◽  
Yosuke Miyairi ◽  
Shinya Yamamoto ◽  
Toshihiro Miyajima
Keyword(s):  
Lake Water ◽  
Inorganic Carbon ◽  
Environmental Changes ◽  
Dissolved Inorganic Carbon ◽  
Anthropogenic Activities ◽  
Aquatic Organisms ◽  
Human Society ◽  
History Of ◽  
Lake Waters ◽  
Reservoir Age

Lakes are sensitive recorders of anthropogenic activities, as human society often develops in their vicinity. Lake sediments thus have been widely used to reconstruct the history of environmental changes in the past, anthropogenic, or otherwise, and radiocarbon dating provides chronological control of the samples. However, specific values of radiocarbon in different carbon reservoirs due to the different pathways of radiocarbon from the upper atmosphere to the lake, called the radiocarbon reservoir age, is always difficult to evaluate because of dynamic processes in and around lakes. There are few systematic studies on radiocarbon reservoir ages for lakes owing to the complex radiocarbon transfer processes for lakes. Here, we investigate lake waters of the Fuji Five Lakes with monthly monitoring of the radiocarbon reservoir effects. Radiocarbon from dissolved inorganic carbon (DIC) for groundwater and river water is also measured, with resulting concentrations (Δ14C) at their lowest at Lake Kawaguchi in August 2018 (–122.4 ± 3.2‰), and at their highest at Lake Motosu in January 2019 (–22.4 ± 2.5‰), despite a distance of 25 km. However, winter values in both lakes show similar trends of rising Δ14C (about 20‰). Our lake water DIC Δ14C results are compared to previously published records obtained from sediments in Lake Motosu and Lake Kawaguchi. These suggest that total organic carbon and compound-specific radiocarbon found in sediments are heavily influenced by summer blooms of aquatic organisms that fix DIC in water. Thus, future studies to conduct similar analyses at the various lakes would be able to provide further insights into the carbon cycle around inland water, namely understanding the nature of radiocarbon reservoir ages.

scholarly journals Evaluation of potential and local forages nutrition as ruminant feed-in Payo Agro-Tourism Area, Solok City, West Sumatera, Indonesia

2021 ◽  
Vol 888 (1) ◽  
pp. 012055
Author(s):  
Adrizal ◽  
Roni Pazla ◽  
Riesi Sriagtula ◽  
Adrinal ◽  
Gusmini
Keyword(s):  
Crude Protein ◽  
Gliricidia Sepium ◽  
Survey Method ◽  
Calliandra Calothyrsus ◽  
Panicum Maximum ◽  
Nutritional Content ◽  
Corn Straw ◽  
Bidens Pilosa ◽  
West Sumatra ◽  
Ruminant Feed

Abstract This study aims to evaluate local forage’s potential and nutritional content in the Payo agro-tourism area of Solok, West Sumatra, Indonesia, to be used as a ruminant feed. This study used a survey method by taking a sample of the forage that grows a lot in the area and then analyzed its nutritional content. The nutritional content analyzed were dry matter, ash, crude protein, crude fiber, crude fat, calcium, and phosphorus minerals. At the same time, the TDN value and the extracted material without nitrogen were calculated based on the formula. The results showed that 12 types of forage have the potential as ruminant feed, namely Panicum maximum, Tithonia diversifolia, Gliricidia sepium, Digitaria sp, Centrocema pubescens, Calliandra calothyrsus, Stachytarpheta jamaicensis, Bidens pilosa, Ipomea triloba, Micania Scandens, Asystasia gangetica, and corn straw. This study shows that Calliandra calothyrsus has the highest crude protein content, and Corn straw contains the lowest crude protein. The highest and lowest TDN values were Gliricidia sepium and Panicum maximum, respectively. Through the linear programming program, these 12 plants can be formulated into 4 ration formulations with 58% TDN and 15-16% crude protein.

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