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INDONESIA
Jurnal Natur Indonesia
Published by Universitas Riau
ISSN : 14109379     EISSN : 25030345     DOI : https://doi.org/10.31258/jnat
Core Subject : Science, Agriculture,
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemistry Earth & Planetary Sciences Physics
Jurnal Natur Indonesia has been published since 1998, is a science journal that presents articles on research results, thoughts and views from researchers and experts in biosciences (basic science), including biology, physics, chemistry and mathematics. Jurnal Natur Indonesia involves reviewers who review each article according to their field of knowledge. The names and institutional origins of the Reviewers are listed on the normal two pages of each volume of publication. The journal is published twice a year, in April and October. In the field of biosciences (basic science) Biology, Physics, Chemistry, Mathematics.
Arjuna Subject : Biokimia, Genetika dan Biologi Molekuler - Biokimia, Genetika dan Biologi Molekuler (Lain-Lain)
Articles 84 Documents
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Analysis of Microplastics on Sediments in the Waters of Selat Panjang of Tebing Tinggi Subdistrict, Meranti Islands Regency, Riau Province Pasaribu, Ridwan Saiful Basri; Nedi, Syahril; Elizal, Elizal
Jurnal Natur Indonesia Vol. 19 No. 2 (2021): October
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jnat.19.2.51-56

Abstract

The study was conducted from March to May 2021 which aims to identify the types, abundance of microplastics and compare the abundance of microplastics between stations in the waters of the Long Strait of High Cliff Subdistrict. Survey methods are applied and PVC pipes are used to collect sediment samples from three different stations with three sampling points at each station. The types of microplastics found are fragments with the most jumblah with film and fiber. The most widely found types are fragments, followed by film and fiber. The abundance of microplastics at Tanjung Harapan Port (5900.00 partkels /kg of dry sediment) is higher than the mouth of the Dorak coastal river (5306.67 partkels/kg of dry sediment) and Banglas Village Mangrove Ecotourism (4120.00 partikels/kg of dry sediment). The results showed that the abundance of microplastics between stations differed significantly. Microplastic differences based on further independent test samples t-test showed that each station compared to mangrove ecotourism area will be significantly different, while between Tanjung Harapan Port and the mouth of the Dorak coastal river showed no significant difference
Seaweed Diversity at Muluk Beach, Sengkol Village, Pujut Sub-District, Central Lombok Regency, Nusa Tenggara Barat Nunik Cokrowati; Nur Yatin; Jayusri Jayusri; Muhammad Jum’at; Salnida Yuniarti Lumbessy; Wiyat Zahroh Sepia Utami
Jurnal Natur Indonesia Vol. 22 No. 1 (2024): April
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jnat.22.1.57-67

Abstract

Seaweed can produce compounds that have diverse biological activities, including antioxidants. These compounds can be used in food, food sources, and medicines. This study aimed to analyze the types of seaweed that grow wild in the waters of Muluk Beach. The research was conducted at Muluk Beach, Sengkol Village, Pujut District, Central Lombok Regency. The research methods used in this study were survey methods and laboratory experiments. The results explained that the type of wild seaweed that grows in the waters of Muluk Beach is Padina sp, Gracilaria coronopifolia, Sargassum cristaefolium, Gracilaria sp, Caulerpa taxifolia, C. taxifolia, Ulva intestinalis, Halimeda opuntia, Ulva sp, Codium, H.tuna, G.salicornia, G.verrucosa, and Acanthopora. The type with the highest antioxidant content is Padina sp, which is 81,31% and has 14,39 mg/L chlorophyll-a levels. The species with the lowest antioxidant content was H.opuntia at 1,79% and chlorophyll at 8,83 mg/L.
Hydro-Oceanographic Dynamics in the Rupat Utara Coastal Area Ilham Ilahi; Mubarak Mubarak; Maellynia Mustofa; Novia M. Afianti
Jurnal Natur Indonesia Vol. 22 No. 1 (2024): April
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jnat.22.1.68-75

Abstract

Coastal areas are one of the areas that have very potential both functionally and economically as a source of life for the surrounding community. However, if the management of coastal resources does not have sustainability, various problems will arise. Rupat Island is one of the water areas that is a crossing path between countries. Sustainable management of coastal areas must follow planning, utilization, supervision, and control of the impact that will be caused both by humans in utilizing it and the effect of oceanographic phenomena on coastal areas, such as hydro-oceanographic factors. This research aims to analyze the characteristics and factors that cause coastal environmental degradation, as well as the ecological carrying capacity of coastal areas in terms of physical aspects of oceanography. The method used in this research is a survey method, which involves interviews and questionnaires analyzed qualitatively and quantitatively. Data collection was done using a purposive sampling method based on affordability. The resulting bathymetric contours indicate that the waters in the middle of the Malacca Strait have a high depth (40 m) with more inland areas (approaching Rupat Island), and the sea depth decreases. The tides shown are field and secondary tides obtained through the prediction of tidal data by NAOTide software. The results of the graph displayed are very appropriate, which shows that the tidal type of Rupat Utara is a mixed tide inclined to double daily (Mixed Tide Prevailling Semi-diurnal). Current patterns from low to high tide have the same direction, from the northeast towards the southeast, with the highest current velocity occurring in February and the current velocity value above 0.5 m/s. While at high tide towards low tide, the current pattern has the opposite direction, namely from the southeast to the northeast, with the highest current speed occurring in December and above 0.8 m/s. The IKP calculation of the entire research area of Tanjung Punak Village is the area with the highest vulnerability level value, with a GPA value of 1215, and the lowest vulnerability level value in Tanjung Medang Village, with a GPA value of 216. The phenomenon of coastal area damage in the Rupat Utara area is almost found in every observation location, which is caused by the impact of both hydro-oceanographic factors and anthropogenic factors.
Effect of Noni Extract (Morinda citrifolia L.) on Spermatozoa Quality of Mice (Mus musculus L.) Mita Ariani; Ardelia Febriana; Feby Djumaita Sari; Khairunisa Khairunisa; Yusni Atifah; Helsa Rahmatika
Jurnal Natur Indonesia Vol. 21 No. 2 (2023): October
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jnat.21.2.87-92

Abstract

This study aims to see the effect of giving noni extract (Morinda citrifolia L.) on the quality of spermatozoa of mice (Mus musculus L.). This study was conducted using an experimental method, with a completely randomized design (RAL), 3 treatments with 5 replicates with 15 male mice divided into three treatment groups, namely the control group (P0), the treatment group with a concentration of 0.3 g/BW (P1), and the treatment group with a concentration of 0.6 g/BW (P2) which then the data were analyzed using ANOVA. This research was conducted from March 2 to April 4, 2023. Observations of the effect of giving noni extract were made by making wet preparations of mice sperm and then observing under a microscope. Based on the research conducted, it was found that noni extract had a different effect from each concentration on motility and morphology in sperm. From the research, it can be concluded that the higher the concentration of noni extract given to mice will reduce the quality of sperm in mice However, at a concentration of 0.3 g/BB, it was found that noni had a positive effect on sperm morphology and motility in mice (Mus musculus L).
Bioremediation, Biosorption, and Biodegradation of the Textile Dye Reactive Black 5 by Life Cultures of Trichoderma asperellum LBKURCC1 Titania Tjandrawati Nugroho; Putri Nabilah; Nuria Wulandari; Yuana Nuralita; Andi Dahliaty; Yanti Yanti
Jurnal Natur Indonesia Vol. 21 No. 2 (2023): October
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jnat.21.2.93-99

Abstract

Reactive black 5 (RB5) is an azo dye widely used in the textile industry for dyeing fabrics. It is categorized as a recalcitrant dye that is hard to degrade and an environmental pollutant. Therefore, textile waste effluents containing this dye must be treated to remove or degrade the dye, before being released into the environment. One method that can be used to degrade synthetic dyes such as RB5 is to use biological methods, by directly using live fungal cells or using laccase enzymes. Trichoderma asperellum LBKURCC1 is a filamentous fungus isolated from cacao plantation soil in Riau, Indonesia, and it is a laccase enzyme producer. To be able to determine the ability of T.asperellum LBKURCC1 life cultures to decolorize RB5 dye, several RB5 dye removal tests were carried out. Incubation of 50 ppm RB5 with life cultures of T. asperellum LBKURCC1 at room temperature (30°C, pH 6.5) for 24 hours resulted in 22% bioremediation, 3.2% biosorption and 19.1% biodegradation of the RB5 dye. The results of this study show that the live culture of T.asperellum LBKURCC1 is capable of biodegrading RB5. This is indicated by the degradation of RB5 by extracellular enzymes produced by these filamentous fungi.
The Effect of Different Substrates on Laboratory Scale Cultivation of Kappaphycus alvarezii Muhammad Heri Hariadi; Nunik Cokrowati; Muhammad Marzuki
Jurnal Natur Indonesia Vol. 21 No. 2 (2023): October
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jnat.21.2.100-108

Abstract

Seaweed is a leading commodity in the Indonesian fisheries sector. Indonesia is the second largest seaweed-producing country in the world after China. K.alvarezii is a type of seaweed that produces kappa carrageenan which can be used as a raw material in industry, making K.alvarezii seaweed very popular for cultivation. Cultivation of K.alvarezii seaweed has developed widely in Indonesian waters. The success of cultivating K.alvarezii seaweed can be achieved if it is supported by a suitable environment for its growth. One of the environmental aspects that influences the growth of K.alvarezii seaweed is the bottom substrate of the waters. This research aims to analyze the best substrate for the survival rate of brown K.alvarezii seaweed cultivated on a laboratory scale. This research used an experimental method using a Completely Randomized Design (CRD) consisting of 4 treatments and each treatment was carried out 3 times to obtain 12 experimental units. The treatments tested were different substrates consisting of sand, coral, volcanic rock, and coral sand. The results of the research show that different types of substrate have a real influence on the survival rate of brown K.alvarezii seaweed cultivated on a laboratory scale. Coral substrate gave the best results with a survival rate of 100%, final weight of 20 g, and carrageenan yield value of 26%.
Optimalization of Water for Nursery and Rearing of Asian Redtail Catfish (Mystus nemurus C.V) Mulyadi Mulyadi; Niken Ayu Pamukas
Jurnal Natur Indonesia Vol. 21 No. 2 (2023): October
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jnat.21.2.109-117

Abstract

Fish culture activities usually release wastes to environments such as faeces, urine, uneaten food and other by-product metabolism activities. For increased water quality, ideally in aquaculture media, various methods could be used, such as filtering techniques and sinking and dissolving methods. Various filter materials could be used to increase water quality, such as silt, gravel, charcoal, coconut shell, palm fiber, and zeoliteThe study on the effect of recirculation systems using various filter materials and aquaponic systems on water quality has been carried out. Several filter materials were used in four kinds of treatment, namely aquarium using aerators (control), aquarium using silt, gravels and palm fiber (recirculation), aquarium using mustard greens (aquaponic system) and aquarium using spoons (recirculation). The study results showed that different filter materials significantly affected nitrate and nitrite concentration in the catfish culture media. It was invented that the treatment of a recirculation system combined with an aquaponic system could increase water quality parameters such as CO2 (7.99 - 11.98 mg.L-1), NH3 (0.02 - 0.07 mg.L-1), NO2 (2.43 - 0.02 mg.L-1), NO3 (4.32 - 0.04 mg.L-1) respectively. Still, the other water quality parameters were similar. The best results were achieved at the same treatment, namely absolute growth rates (4.01 g), daily growth rates (1.96 %) and survival rates (91.11 %), respectively.
Pancreas Histology of Hyperglycemia of Mice (Mus musculus L.) After Treatment Basil (Ocimum x africanum Lour.) Leaf Extract and Papaya (Carica papaya L.) Elsa Safitri; Sutyarso Sutyarso; Sri Wahyuningsih; Rochmah Agustrina
Jurnal Natur Indonesia Vol. 21 No. 2 (2023): October
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jnat.21.2.118-123

Abstract

Hyperglycemia is a condition in which the level of glucose in the blood is abnormally high. Hyperglycemia is caused by disturbances in the metabolic system in secreting insulin. Hyperglycemia if left unchecked can cause a disease which is usually called diabetes. Basil (Ocimum x africanum Lour.) and papaya (Carica papaya L.) leaf extracts can reduce blood glucose levels in people with diabetes mellitus because they contain active compounds of flavonoids, alkaloids and tannins which function as anti-diabetics. The aim of this study was to examine the effectiveness of the effects of basil and papaya leaf in affecting the level of islet damage, and repairing pancreatic histological damage in hyperglycemic mice. This study used a completely randomized design with 5 treatment groups and 5 replications. Group K(N) as normal control, group K(+) as positive control, group K (-) as negative control, group P 1 (alloxan induced and treated with ethanol extract of basil leaves 24.5 mg/35g BW mice) 14 days oral) , P 2 group (induced by alloxan and treated with papaya leaf ethanol extract 24.5 mg/35 g BW mice (14 days oral). Data on the level of histological damage to the pancreas of hyperglycemic mice were analyzed using the Kruskal-Wallis method and the Wilcoxon-MannWhitney test at a significant level of 5%. Data histological appearance of the Langerhans were analyzed descriptively.The results showed basil leaf extract and papaya had an effect on the level of damage to the pancreas of mice, basil leaf extract was effective compared to papaya in histological repair of the mice pancreas.
Abundance and Distribution Patterns of Gastropods in the Intertidal Bay of Kambang Lengayang Sub-District, Southern Coastal District, West Sumatera Ichwanul Harif; Afrizal Tanjung; Elizal Elizal
Jurnal Natur Indonesia Vol. 19 No. 2 (2021): October
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jnat.19.2.37-42

Abstract

This study aims to determine the abundance and distribution pattern of gastropods in the intertidal bay, Kambang Lengayang District, Pesisir Selatan Regency, West Sumatra. The benefits of this research are expected to be a reference or information for further research in Kambang Bay which in the end is expected to minimize the adverse effects of gastropod hunting. The research method used in this study is a survey method, namely direct observation and sampling which is divided into 3 stations where the sampling station 1 is taking in the coastal waters of the bay in an area where there is no community activity, station 2 is taking in the waters of the bay in the fishing trawl area. station 3 taking in the coastal waters of Kambang in the reclamation area. Based on the analysis of organic sedimentary material in the study area, the average value was obtained at station 1 (3.55%), station 2 (4.20%) and station 3 (3.33%). Based on the analysis, the sediment fraction that dominates each station is sand. The gastropods found at the study site were Clypeomorus bifasciata, Littoraria scabra and Cerithulata cingulata. The abundance of gastropods in the coastal waters of Kambang ranged from 2.33 to 5.00 Ind/m2. The results of the ANOVA test showed that the abundance of gastropods in the bay waters showed 0.214 beaches, indicating that the difference in abundance between stations was not significant. The gastropod pattern found at the study site is generally in groups
Study of Gastropod Community Structure After Development of Tourism Activities on the Senjoyo River Marsahanda Astri Ramagita; Sucahyo Sucahyo; Desti Christian Cahyaningrum
Jurnal Natur Indonesia Vol. 21 No. 2 (2023): October
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jnat.21.2.124-133

Abstract

It is thought that the development of the Senjoyo River as a tourist attraction in Semarang Regency will cause changes to the natural ecosystem in the area, one of which is changing the structure of the existing gastropod community. This research is a quantitative analysis research using a survey method that aims to examine the structure of the gastropod community after the development of tourism activities on the Senjoyo River. Gastropod samples were taken from 10 different observation stations along the Senjoyo River, which are located at 7˚22'23"S and 110˚31'37"E. Observation station locations were determined by the purposive random sampling method, based on tourism activity density. The result showed types of gastropods that were found in the Senjoyo River namely, Sulcospira testudinaria, Tarebia granifera, Brotia costula, Thiara scraba, and Melanoides tuberculata with clustered distribution patterns (Id>1). Statistical analysis showed that location affected gastropod abundance (Asymp. Sig of 0.043), with the highest abundance found at station seven (45,11 individuals/m2). So station seven, with sandy and muddy substrate conditions, moderate current speed (0.257 m/s), and rarely found human activity, is the most suitable location to support the survival of gastropods in the Senjoyo River. Furthermore, the gastropod community structure indicates environmental changes at observation stations nine and ten, the locations where the most activities and construction of tourism facilities were found. That was indicated by the low diversity (H’= 0.00-0.01) and evenness (E = 0.00) index of gastropods, and there is dominance by Sulcospira testudinaria (C= 0.98-1.00).

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