Sebaran Bentik Foraminifera pada Sedimen Permukaan di Perairan Pantai Sergang dan Marok Tua Kabupaten Lingga

The research was conducted in June 2015. The sampling and measurement of water quality were carried out in Sergang and Marok Tua coastal waters of Singkep Island, Riau Archipelago. This study was aimed to determine the distribution of benthic foraminifera and relative sedimentation rate in both areas. Survey method was used by taking samples from 2 stasions with 3 replicates at each stasion. Samples of sediments were taken and then analyzed to determine the number of individual, species, distribution pattern, the relative sedimentation rate and sediment fractions. The results showed that the number of individual of benthic foraminifera found in the wartes of Sergang were higher than in Marok Tua. In contrary the number of species of benthic foraminifera found in Marok Tua were higher than in Sergang. Sediment fraction in Sergang was dominated by fine sand and very fine sand. Based on Morisita index, the pattern of benthic foraminifera distribution was categorized as cluster. Results of the relative sedimentation rate calculation were divided into high in Sergang coastal waters that has limited antrophogenic activities with an average of 83.06 %. Lower sedimentation rate was found in Marok Tua with an average of 67.47%. Marok Tua coastal waters has more antrophogenic activities such as fishing boat activities, residential as well as tin and sand mining areas

Heavy Metal Concentrations of Cd and Zn in Seawater and Sediment of the West Coast of Karimun Besar Island Riau Islands Province

This research was conducted from January to March 2015 by taking samples of seawater and sediment from the west coast of Karimun Besar Island of Riau Islands Province and analyzed their heavy metals concentrations. Analysis of samples was carried out in Marine Chemistry Laboratory, Faculty of Fisheries and Marine Sciences, University of Riau by using Atomic Absortion Spectrophotometer. The results showed that the highest concentrations of Cd (0.109 mg/L) and Zn (0.227 mg/L) in seawater were found in the area of the boat and harbour activities, whilst the highest concentration in the sediment samples were found for Cd in Pelawan Coast (3.664 μg/g) and Zn (6.552 μg/g) in the ferry port area. The highest organic matter in the sediment was found in the ferry port (3.82%) and the lowest was in the Pelawan Coast (0.65%). Zn concentrations in sediment were still below the range of the ERL but Cd concentration has already exeeded the ERL but still below the ERM value. Based on Potential Ecological Risk Index, Cd may cause possible negative impact on the aquatic ecology of the West Coast of Karimun Besar Island

Effect of Addition of Different Nitrate Concentration on Spirulina Platensis Biomass with Semi Outdoor System

Spirulina platensis is one type of microalgae that has high nutrient and protein content and can live in fresh and marine waters. In the growth of S. platensis requires several supporting factors in its growth period, one of which is nitrate (NO3). Nitrate is needed in the formation of proteins and amino acids in cells and also helps in increasing biomass. This study was conducted with the aim to see the effect of adding different nitrate concentrations to S. platensis biomass with a semi-outdoor system. This research was conducted in MarchApril 2019 using the experimental method. Water quality parameters during the study obtained in the form of temperatures ranging from 29 – 30oC, pH 9 and salinity 25 ppt. The optimum nitrate concentration for the growth of S. platensis was at a concentration of 9 ppm with a total biomass of 0.669 grams

The Concentrations and Distributions of Heavy Metals Pb, Cu and Zn in the Sea Water and Sediment in Estuary Area of Dumai, Riau Province.

The research of heavy metal (Pb, Cu, Zn) has been conducted in June 2015in the estuary area of Dumai, Riau Province. The samples of water and sedimentwere taken in difference area, consisting of 15 stations by purposive samplingmethod. The analysis showed heavy metal contents were as followes Pb 0.051 –0.061 mg/l, Cu 0.038 – 0.047 mg/l, and Zn 0.182 – 0.243 mg/l respectively. Theheavy metal contents in water has exceeded the quality standard ofKep.MENLH/51/2004 on sea water quality standard for marine organism. On theother hand, the sediment analysis showed heavy metal contents were Pb 2.700 –3.500 μg/g, Cu 2.522 – 6.97 μg/g and Zn 15.977 – 18.059 μg/g. According to thisresearch it was concluded that the estuary area of Dumai has been contaminated

Analysis Of Organic And Anorganic Debris In Air Manis Beach, Nirwana Beach And Carolina Beach Of Padang City West Sumatera Province

This research was conducted in June 2019 to determine the kind of marine debris, source, production and the correlation with the number of tourists in Air Manis, Nirwana, and Carolina Beach of Padang City, West Sumatera. Three sampling stations were surveyed. The results showed that marine debris found in those beaches were categorized organic, such as: fruits, leaves, wood, bamboo, sea plants and else an organic especially: plastic, glass, rubber, metal, etc. Air Manis Beach had the highest production of marine debris (1340 pcs), followed by Nirwana Beach (538 pcs) and Carolina Beach (500pcs). The source of marine debris were assessed to come from visitors and from outside those beac hes carried by sea current. The total of marine debris production was 29.165 kg. Plastic was the most common type of debris found. The production of garbage in the number of visitors shows very strong relationships (Y = -94,505 + 2,018x ; r = 0,97 ). There is strong correlation between the number of visitors and marine debris production in those beaches

Analysis of Sediment Organic Content and Macrozoobenthos Abundance in the Estuary of Batang Arau River Padang City West Sumatera Province

This research was conducted in April 2017 by taking samples of sediment and macrozoobenthos from Estuary of Batang Arau River of Padang City, West Sumatera Province. The aim of the study was to analyze the content of organic sediment and macrozoobenthos abundance and the relationship of organic sediment with macrozoobenthos abundance. The method used is a survey method consisting of 4 stations with 3 replications at each station. The results showed that the average content of organic sediment material in Estuary of Batang Arau River is 10.78% and the content of organic sediment material between different stations is significantly different (P0.05). The content of organic sediment material and macrozoobenthos abundance showed a weak positive relationship with the regression equation Y = 7.024 + 0.461X

Analysis of Chromium (Cr) and Nickel (Ni) in the West Coast of Karimun Island Riau Archipelagos Province

This research was conducted in March 2015 by collecting samples of water and sediments from the west coast of Karimun island. The purpose of this study was to determine the concentration of heavy metals chromium (Cr) and nickel (Ni) in seawater and sediments. Sample collection was done by purposive sampling method in which the three selected station. The highest Cr concentration in sea water was found in Station 2 (0.148 mg/L) and Ni in Station 3 (0.071 mg/L) whilst highest Cr and Ni concentrations in Station 2 (4.643 and 2.289 μg/g). Compared tothe Standard Quality Guideline for Sediment, the concentrations of Cr and Ni were still below the value of ERL and still very far below the value of ERM. In contrast with Ni, which has negative correlation with its concentration in sediment, the Cr concentration in sea water was positively correlated with its concentration in sediment