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Journal of Coastal and Ocean Sciences
Published by Universitas Riau
ISSN : 27454355     EISSN : 27464512     DOI : -
Core Subject : Science, Agriculture, Social,
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Environmental Science Immunology & microbiology Physics
Journal of Coastal and Ocean Sciences is a journal publishes scientific articles from research by lecturers and other researchers in the marine sector. Covers aspects of biology, physics and chemistry, both for brackish waters (mangrove swamps, river estuaries) and marine waters (coastal and offshore seas).
Arjuna Subject : Ilmu Pertanian dan Biologi (Semua) - Ilmu Perairan
Articles 10 Documents
 1 
Search results for , issue "Vol. 6 No. 3 (2025): September" : 10 Documents clear
Relationship between Coral Reefs and the Abundance of Reef Fish of the Pomacentridae Family in the Waters of Setan Island, West Sumatra Wardana, Rangga; Thamrin, Thamrin; Rifardi, Rifardi
Journal of Coastal and Ocean Sciences Vol. 6 No. 3 (2025): September
Publisher : Department of Marine Science, Faculty of Fisheries and Marine Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jocos.6.3.157-165

Abstract

Coral reefs play a role in maintaining marine biodiversity by providing habitat for various aquatic organisms, including reef fish from the Pomacentridae family. This study aims to analyze the relationship between coral reef cover and the Abundance of Pomacentridae reef fish in the waters of Setan Island, West Sumatra. The underwater photo transect (UPT) method is employed for coral cover analysis, while the underwater visual census (UVC) method is utilized for collecting fish abundance data. The results showed that the average percentage value of coral reef cover at a depth of 3 m was 20.38%, and at a depth of 6 m, it was 17.51%, indicating a poor category for the percentage value of coral reef cover. Data collection was conducted at four different stations. The highest coral cover was recorded at Station I (31.35%), while the lowest was at Station IV (0.33%). The Abundance of Pomacentridae reef fish varied between stations, with the highest Abundance observed in areas with higher coral cover. Based on simple linear regression analysis, the percentage of live coral cover accounts for 56.19% of the variation in the abundance value of Pomacentridae coral fish (R² = 0.5619), with a strong correlation (r = 0.7496). This indicates that declining coral reef conditions can harm fish populations. This finding underscores the significance of coral reef conservation efforts in maintaining marine biodiversity and ecosystem balance
Analysis of Mangrove Forest Health in the Coastal Area of Kutawaru Village, Cilacap Regency, Central Java Oktaria, Rusiani; Efriyeldi, Efriyeldi; Zulkifli, Zulkifli
Journal of Coastal and Ocean Sciences Vol. 6 No. 3 (2025): September
Publisher : Department of Marine Science, Faculty of Fisheries and Marine Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jocos.6.3.150-156

Abstract

Mangroves are forests that grow in coastal areas and play a crucial role in maintaining environmental balance, as the health of this ecosystem significantly impacts the stability of coastal areas and the survival of communities that depend on natural resources. This study aims to analyze the Mangrove Health Index (MHI) in the coastal area of Kutawaru Village, Cilacap Regency, Central Java. The transect method was used at three research stations representing mangrove forests. The observed parameters included type identification, canopy cover, stem diameter, and density of trees and saplings. A total of 14 mangrove species were identified, with Rhizophora apiculata as the dominant species, having the highest Importance Value Index (IVI) of 104.69%. The highest tree density is found at Station 3, with a value of 4,611.11 trees/Ha, and the average canopy cover is 80.8%, which is classified as very dense. The average MHI value of 73.74% shows that the condition of the mangrove ecosystem in this region is relatively good. The results of this study are expected to serve as a reference for the formulation of sustainable mangrove management and conservation policies
Assessment of Marine Ecotourism Development Potential in Lapin Beach, North Rupat, Riau Province Akbar, Aidil Rahmad; Samiaji, Joko; Yoswaty, Dessy
Journal of Coastal and Ocean Sciences Vol. 6 No. 3 (2025): September
Publisher : Department of Marine Science, Faculty of Fisheries and Marine Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jocos.6.3.139-149

Abstract

Lapin Beach in North Rupat, Riau Province, has excellent potential to be developed as a marine ecotourism area due to its natural beauty and local cultural richness. However, no scientific research has explored this potential in depth. This study aims to analyze the potential and formulate strategies for the sustainable development of marine ecotourism in Lapin Beach to improve the welfare of local communities. The research was conducted from December 2024 to February 2025. Data were collected through observation, interviews, questionnaires, and water quality measurements. The analysis used is the coastal tourism suitability index and the SWOT approach. The results showed that Lapin Beach has strong potential for ecotourism, supported by easy access, natural panoramas, and community participation. The tourism suitability index ranged from 83.97 to 86.53%, indicating a high suitability (S1). Water quality and coastal topography support tourism activities. SWOT analysis suggested strategies including promotion, facility improvements, and community engagement in maintaining sustainability. Recommended development strategies include optimizing natural attractions, empowering local businesses, improving infrastructure, and enhancing monitoring efforts. Further studies should consist of aspects of biota, vegetation, and economic impact to support sustainable ecotourism management and enhance community well-being.
Species Composition and Abundance of Zooplankton at Different Depths in the Waters of Teluk Makmur Subdistrict, Dumai City Sinaga, Merisa Debora; Nurrachmi, Irvina; Samiaji, Joko
Journal of Coastal and Ocean Sciences Vol. 6 No. 3 (2025): September
Publisher : Department of Marine Science, Faculty of Fisheries and Marine Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jocos.6.3.182-188

Abstract

Teluk Makmur in Dumai City is a coastal area experiencing ecological pressure due to human activities, such as tourism and industry. Changes in water quality in this region may affect the structure of the zooplankton community, which plays a crucial role in the food chain. This study aims to determine the species and abundance of zooplankton at various depths and stations. The research was conducted in November 2024 at Koneng Beach, Marina Beach, and Puak Beach. At each station, samples were collected at three depths (1 m, 3 m, and 5 m) using survey and purposive sampling techniques. Water quality parameters such as temperature, salinity, DO, pH, transparency, current, nitrate, and phosphate were also measured. Identification revealed five zooplankton species from the class Hexanauplia: Acartia sp., Calanus sp., Temora turbinata, Oithona sp., and Nauplius sp. The highest abundance was recorded at a depth of 5 m (41,542 ind/l), while the lowest abundance was found at depths of 1 m and 3 m (0 ind/l). Based on stations, the highest abundance was observed at Station I (27,694.67 ind/l) and the lowest at Station II (8,308.33 ind/l). One-way ANOVA test results showed no significant difference in zooplankton abundance either between depths or between stations (p > 0.05).
Abundance and Diversity of Sea Cucumber (Holothuroidea) in Hajoran Beach, Central Tapanuli, North Sumatra Bethanya, Ela Nanda; Zulkifli, Zulkifli; Samiaji, Joko
Journal of Coastal and Ocean Sciences Vol. 6 No. 3 (2025): September
Publisher : Department of Marine Science, Faculty of Fisheries and Marine Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jocos.6.3.202-206

Abstract

Hajoran is a beach located on the coast of Pandan District, Tapanuli Tengah Regency, North Sumatra. This beach is one of the popular tourist destinations. It boasts high marine biodiversity, including a diverse array of marine organisms, which are part of the invertebrate animal group. This study was conducted in December 2024 along the Hajoran coast. The objective of this study was to determine the species, abundance, and diversity of sea cucumbers. The study also utilized supporting data, including water quality parameters that characterize the habitat conditions of sea cucumber species, such as temperature, salinity, depth, dissolved oxygen (DO), and total suspended solids (TSS). The study employed a survey method with sample collection using the quadrant transect method at three stations. Based on the study's results, four species were identified at the study site: Holothuria atra, H. scabra, Stichopus ananas, and S. chlorosomatus. The average abundance at all stations ranged from 9.600 to 14.000 ind/ha; the highest abundance was recorded at station III. The relative abundance values for each sea cucumber species ranged from 8 to 100%. The lowest relative diversity value was shown by the species S. chloronotus, with a value of 8% at station III. Conversely, the species H. atra exhibited the highest relative diversity value. The diversity index (H') of sea cucumbers at the research site was classified as moderate. Overall, the relatively stable and standardized water quality conditions at Hajoran Beach support the abundance and diversity of sea cucumber species
Analysis of Coastline Changes and Water Current Circulation Patterns in Batam City, Riau Islands Province Nainggolan, Robby; Mubarak, Mubarak; Nursyirwani, Nursyirwani
Journal of Coastal and Ocean Sciences Vol. 6 No. 3 (2025): September
Publisher : Department of Marine Science, Faculty of Fisheries and Marine Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jocos.6.3.174-181

Abstract

Environmental damage is caused by coastal reclamation to advance the economic sector in Batam City. Reclamation can cause changes in the coastline of Batam City. This study aims to determine the extent of changes in the coastline that occurred in Batam City from 2003 to 2023 and to understand the pattern of ocean current circulation in Batam City before reclamation in 2003 and after reclamation in 2023. This study was conducted in January 2024. The method used for data analysis to observe changes in the coastline is the Digital Shoreline Analysis System. Numerical models available in the MIKE21 software to model water circulation in estuary beaches. The study results show that land additions dominated changes in the coastline of Batam City from 2003 to 2023. The sub-district with the most significant addition was Bengkong, with an addition of 816.58 m and an addition rate of 39.79 m/year, followed by Nongsa, with an addition of 279.05 m and an accretion rate of 13.59 m/year. The flow pattern during the ebb and flow before reclamation had a maximum speed of 0.27 m/s, while after reclamation, the maximum current speed increased to 0.33 m/s. It can be concluded that the progression of the coastline primarily drove the changes in Batam City's coastline from 2003 to 2023. Meanwhile, the increasing current speed can reach 0.33 m/s
Heavy Metal (Pb, Cu, and Zn) Content in Geloina erosa and Cerithidea obtusa from the Western Coast of Dumai, Riau Province Fajriani, Annisa; Amin, Bintal; Efriyeldi, Efriyeldi
Journal of Coastal and Ocean Sciences Vol. 6 No. 3 (2025): September
Publisher : Department of Marine Science, Faculty of Fisheries and Marine Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jocos.6.3.166-173

Abstract

Industrial and shipping activities in coastal areas have the potential to increase heavy metal pollution, which can accumulate in marine organisms and impact food safety. On the west coast of Dumai, Geloina erosa and Cerithidea obtusa are widely consumed by the local community, making it important to study their heavy metal content. This study aims to analyse the levels of Pb, Cu, and Zn in the soft tissues of these two species and compare the differences between species and sampling locations. The study was conducted in February 2025 at two stations: Station 1 (Purnama) and Station 2 (Pangkalan Sesai). Samples were collected using purposive sampling and analysed using Atomic Absorption Spectroscopy (AAS). The results showed that the average Pb, Cu, and Zn content in G. erosa were 6.79 µg/g, 6.13 µg/g, and 8.36 µg/g, respectively, while in C. obtusa they were 7.09 µg/g, 6.27 µg/g, and 7.41 µg/g. Significant differences (p < 0.05) were detected in the Cu and Zn content in G. erosa, as well as Zn in C. obtusa, between stations. Pb and Cu were generally higher in both species at Station 2, while the highest Zn levels were found in G. erosa at Station 1 (9.12 µg/g) and C. obtusa at Station 2 (8.50 µg/g). The highest PTWI value was found in G. erosa at Station 1; however, all results remained within safe consumption limits. Therefore, both species are deemed safe for consumption, despite variations in heavy metal content between species and research locations
Heavy Metal Concentrations in Avicennia alba from the Western Coast of Dumai City, Riau Province Yona, Fitria Mai; Amin, Bintal; Efriyeldi, Efriyeldi
Journal of Coastal and Ocean Sciences Vol. 6 No. 3 (2025): September
Publisher : Department of Marine Science, Faculty of Fisheries and Marine Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jocos.6.3.132-138

Abstract

Coastal ecosystems play a crucial role in supporting biodiversity, but are increasingly threatened by heavy metal pollution from industrial and domestic activities. The mangrove species Avicennia alba can absorb heavy metals through phytoremediation processes, making it a promising bioindicator of environmental contamination. This study aimed to analyze the concentrations and variations in the accumulation of lead (Pb) and copper (Cu) in A. alba roots, stems, and leaves along the western coast of Dumai City, Riau Province. Fieldwork was conducted from January to February 2025 at two sampling sites: Pangkalan Sesai Village (Station 1) and Purnama Village (Station 2). Heavy metal concentrations were determined using Atomic Absorption Spectrophotometry (AAS) following wet digestion. Environmental parameters were also measured, including temperature, salinity, and pH. Data analysis involved descriptive statistics, non-parametric tests, and independent t-tests. The results indicated that Pb and Cu were present in all plant parts. The highest concentration of Pb was found in the stems (7.05 µg/g), while Cu was most concentrated in the roots (5.38 µg/g). No statistically significant differences were observed among plant parts (p > 0.05); however, a significant spatial difference in Pb concentrations between the two stations was detected (p < 0.05). These findings suggest that anthropogenic activities and local water quality conditions likely Influence the observed variations. Overall, A. alba demonstrates strong potential as a bioindicator species for monitoring heavy metal contamination in coastal environments.
Potential Carbon Stock and Absorption in Mangroves in Penempul Village, Sungai Sembilan District, Dumai City, Riau Province Yuhanda, Sabina Dwi; Siregar, Yusni Ikhwan; Tanjung, Afrizal
Journal of Coastal and Ocean Sciences Vol. 6 No. 3 (2025): September
Publisher : Department of Marine Science, Faculty of Fisheries and Marine Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jocos.6.3.189-196

Abstract

Global warming is caused by increased greenhouse gas emissions, particularly CO₂, and can be controlled through carbon sequestration by vegetation, including mangrove forests. The study was conducted in January and February 2025 in the mangrove area of Penempul Village, Sungai Sembilan District, Dumai City, Riau Province, to determine the density in relation to biomass, carbon stock, and CO₂ absorption, as well as to investigate the relationship between density and biomass, carbon stock, and CO₂ absorption. The method used in this study was a survey method with a purposive sampling technique, which involved measuring the diameter of mangrove tree trunks at chest height (DBH). Mangrove biomass calculations were performed using allometric equations, and biomass was converted into carbon stock and CO₂ absorption. The study results indicated the presence of 11 mangrove species, with average estimated biomass, carbon stock, and CO₂ absorption values of 521.84 tons/ha, 245.25 tons/ha, and 899.35 tons/ha, respectively. The ANOVA results showed significant differences (p > 0.05) between the three stations regarding biomass, carbon stock, and CO₂ absorption. Mangrove density had a weak correlation with biomass, carbon stock, and CO₂ absorption, with a correlation coefficient of 0.299.
Storage Temperature on the Product Quality of Several Pro Coffee Variants That Contain (Bacillus cereus SN7) Farisy, Muhammad Fhito Al; Feliatra, Feli; Batubara, Ummi Mardhiah
Journal of Coastal and Ocean Sciences Vol. 6 No. 3 (2025): September
Publisher : Department of Marine Science, Faculty of Fisheries and Marine Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jocos.6.3.197-201

Abstract

This study aims to analyze the effect of storage temperature on microbial growth in several pro coffee variants and to investigate the impact of storage temperature on the quality of pro coffee containing B. cereus SN7. The coffee variants used were original, latte, original jelly, and latte jelly at temperatures of 10, 25, and 37°C for 7 days of storage. Microbial growth was observed using the total plate count method, while the pro coffee quality was analysed using the organoleptic test. The results showed that low storage temperatures can inhibit microbial growth and maintain the quality of pro coffee. The lowest total number of microbes was found in the original variant with a storage temperature of 10°C, with a value of 0.11 × 103 CFU/mL, and the highest total number of microbes was found in the latte jelly variant with a storage temperature of 25°C, with a value of 3.476 × 103 CFU/mL. In the organoleptic test, the highest value was found in the latte variant coffee at a storage temperature of 10°C, categorized as 'very like', with a value of 35% for taste, 30% for aroma, and 30% for colour. The effect of temperature on the product quality of several probiotic coffee variants containing B. cereus SN7 showed a significant difference (p < 0.05) in microbial growth and the quality value of the probiotic coffee. Statistical analysis showed the effect of temperature on the product quality of several pro coffee variants containing B. cereus SN7.

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