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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 293 Documents
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Abundance of Chaetodontidae Family Reef Fish and Coral Reef Condition in the Sikuai Island Area, West Sumatra Yosefa, Bella; Thamrin, Thamrin; Tanjung, Afrizal
Journal of Coastal and Ocean Sciences Vol. 6 No. 2 (2025): May
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.6.2.108-113

Abstract

Coral reefs are massive piles of sediment from calcium carbonate produced by the phylum cnidaria, class Anthozoa, and order Madreporaria, with the addition of calcareous algae and other organisms that produce calcium carbonate. One group of biota that lives in association with coral reefs and plays a vital role in the coral reef ecosystem is the Chaetodontidae fish. The taking of the Chaetodontidae family as research material is because the coral fish of the Chaetodontidae family are indicator fish for coral reef health that can assess, monitor and predict the condition of coral reefs. Given the importance of the function and the existence of coral reefs. This study aimed to determine the condition of coral reef cover, analyze the abundance of reef fish in the Chaetodotidae family, and determine the relationship between coral reef cover and the abundance of reef fish in the Chaetodotidae family. This study was conducted in December 2024 in Sikuai Island, West Sumatra. This study used survey methods, such as UVC (underwater visual census) and UPT (underwater photo transect). The research location was divided into three stations in the southern part of Sikuai Island because the southern part is relatively protected from large waves during the west wind season. Station I is next to Sirandah Island, Station II is in the harbour area, and Station III is in the abandoned ship area. The analysis showed that the highest percentage of coral cover was found at Station III, namely 45.13%, and the lowest rate was found at Station I, 6.47%. The calculation of reef fish abundance showed that the highest abundance of reef fish was found at station III, namely 5000 ind / ha and the abundance of reef fish at station I was 6.47%.
Analysis of Environmental Conditions in Red-Eyed Snail Silvofishery in Buruk Bakul Village Simangunsong, Gusnar; Budijono, Budijono; Fauzi, Muhammad
Journal of Coastal and Ocean Sciences Vol. 6 No. 2 (2025): May
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.6.2.102-107

Abstract

Buruk Bakul Village has a mangrove distribution covering approximately 168 hectares. However, coastal abrasion, which reaches an average of 4 meters per year, directly impacts biodiversity, including a decline in gastropod populations due to loss of shelter and food sources. One affected species is the red-eyed snail (Cerithidea obtusa), which plays a vital role in the food chain of coastal ecosystems. This study aims to determine the practice of silvofishery on C. obtusa and environmental quality, as well as changes in environmental quality due to silvofishery practices. Sampling technique: Sampling was done using the stratified random sampling method. The results showed that Silvofishery practices integrating mangrove conservation with red-eyed snail cultivation in Buruk Bakul Village showed varying results depending on environmental conditions. Plot 3 recorded the best growth with a length of 1.22 cm and a weight of 1.91 g, which was supported by the fine mud substrate and high organic matter content. In contrast, plot 1 showed the lowest results with a length of 0.77 cm and a weight of 0.48 g. Environmental conditions such as soil pH, temperature, and organic matter significantly influence snail growth, with soil pH and temperature as the dominant factors.
Organic Carbon Stock in Sediment of the Rehabilitated Mangrove Ecosystem in Kedabu Rapat Village, Meranti Islands Regency Cahyo, Bintang Dwi; Efriyeldi, Efriyeldi; Amin, Bintal
Journal of Coastal and Ocean Sciences Vol. 6 No. 2 (2025): May
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.6.2.94-101

Abstract

Global climate change caused by increasing atmospheric CO₂ emissions threatens coastal ecosystems, including mangrove forests that function as carbon sinks. Kedabu Rapat Village in Meranti Islands Regency has implemented a mangrove rehabilitation program since 2017 to overcome coastal abrasion and restore the ecosystem. This study examines mangrove density, organic carbon stock in sediment, the relationship between density and carbon stock, and variations in carbon stock between sediment depths. The study was conducted at three stations according to the year of rehabilitation using a survey method with sediment sampling as deep as 30 cm, Organic carbon was analyzed using the LOI method. The study's results identified one mangrove species, Avicennia alba, from the Acanthaceae family, which dominated all observation stations. Vegetation density is classified as very dense, averaging 7,911 ind/ha, with the highest density at Station 1 (8,935 ind/ha). All stations' average sediment carbon stock reached 117.23 tons/ha, with the highest value at Station 3 (135.19 tons/ha) and the lowest at Station 1 (96.97 tons/ha). Statistical analysis revealed a weak correlation (r = 0.218; p > 0.05) between mangrove density and sediment carbon stock, indicating that other environmental factors, such as sedimentation and sediment input, play a more significant role. The distribution of carbon stock by depth was relatively uniform, ranging from 38.25 to 40.58 tons/ha. These results indicate that external factors are also determinants of carbon absorption rates
Relationship Between Microplastics Abundance and Sediment Organic Content in Dumai Coastal Waters Zientika, Zientika; Amin, Bintal; Yoswaty, Dessy
Journal of Coastal and Ocean Sciences Vol. 2 No. 3 (2021): 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/

Abstract

Plastics in the environment would eventually be degraded into plastic granules which are called microplastics. In recent years, microplastics have been spread widely not only inland but also in aquatic habitats, where averagely 5% of the plastic produced each year will end up in marine waters. The purpose of this study which was conducted in October to November 2020 was to identify the type and abundance of microplastics in the sediment as well as its possible relationship with the sediment organic matter in Dumai waters. Sediment samples were taken from Dumai coastal waters by using purposive sampling method. Identification of the types and abundance of microplastics as well as the analysis of sediment organic content were carried out in the Laboratory of Chemical Oceanography, Department of Marine Sciences, Universitas Riau. Microplastic and sediment particles were separated using 150 ml saturated NaCl solution. The types of microplastics found are fiber, fragment and films, where fiber was found to be the most commonly found (36.43%), followed by fragments (31.97%) and films (31.60%), respectively. No significant correlation found between microplastic abundance and the sediment organic content in Dumai coastal waters.
Community Structure of Benthic Epifauna in Mangrove Forest Rehabilitation of Kedaburapat Village Kepulauan Meranti District Syafrhani, Wan Nabila; Efriyeldi, Efriyeldi; Zulkifli, Zulkifli
Journal of Coastal and Ocean Sciences Vol. 2 No. 3 (2021): 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/

Abstract

The mangrove forest area is important for benthic epifauna because it is a habitat for benthic epifauna. This research was conducted in September 2020 in the mangrove forest rehabilitation area of ​​Kedaburapat Village, Kepulauan Meranti. In this study, it was divided into 2 areas, namely the mangrove planting period 2018 and the planting period 2019. The result of this study found 18 species from 2 classes, Gastropods and Malacostraca. Gastropod class namely Littoraria melanostoma, Nerita balteata and Sphaerassiminea miniata; and Malacostraca classes namely Macrophthalmus convexus, Clibanarius longitarsus and Clibanarius ambonensis. Macrozoobenthic abundance values ​​ranged from 50.33 to 46.63 ind/m2, the diversity index value (H ') was between 1.23-2.27, the dominance index value was 0.30-0.65, the uniformity index (E) ranged from 0.32-0.67 and the distribution ranges from 0.94-1.61. Water quality parameters measured include temperature, salinity, pH, organic matter, TSS and substrates that affect the presence of benthic epifauna.
Structure of the Mangrove Community in Batang Masang Beach Tiku V Jorong Tanjung Mutiara District Agam Regency West Sumatera Syarif, Wilman; Nasution, Syafruddin; Mubarak, Mubarak
Journal of Coastal and Ocean Sciences Vol. 3 No. 2 (2022): May
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/

Abstract

The survey was conducted in March 2021. The purpose of this survey was to analyze the structure of the mangrove community at Batang Masang Beach Nagari Tiku V Jorong Tanjung Mutiara District Agam Regency West Sumatra. The method used in this study is a survey method. In the mangrove area of ​​Batang Masang, 3 observation stations have been determined. Each observation station was drawn by 3 transects over 50 m drawn from the mangrove boundary of the sea to the land. In each transect, 3 plots were placed, each plot consisting of 3 sizes, namely 10 x 10 m for the tree category, 5 x 5 m for the sapling category, and 2 x 2 m for the seedling category. The results of the survey revealed that there were 2 classes, namely the Magnoliopsida class and the Liliopsida class. In the magnoliopsida class, there are 3 genera namely Acanthus, Rhizophora, and Sonneratia, and there are 3 species namely A. ilicifolius, R. apiculata, and S. alba. In the class Liliopsida there is only 1 genus, namely Nypa, and 1 species N. fruticans. Zone I is dominated by S. alba species, in zone II there are 2 dominant species, namely S. alba and R. Apiculata, and zone III is dominated by R.apiculata species. The criteria for mangrove vegetation are in the scarce criteria with densities ranging from 277.78 to 1066.67 ind/ha.
Distribution and Abundance of Blood Shells (Anadara granosa) on the Coast of Concong Luar Village Indragiri Hilir Regency Fadhil, Mohd. Isfan; Mulyadi, Aras; Tanjung, Afrizal
Journal of Coastal and Ocean Sciences Vol. 3 No. 2 (2022): May
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/

Abstract

This study was conducted in September 2021, around the coastal of Concong luar village Indragiri Hilir Regency with the aim to find out the abundance, distribution, and morphometrics of blood shell (Anadara granosa). The method used survey methods, in which blood shell sampling and aquatic substrates, as well as measurements of environmental parameters, were conducted in the field and in the laboratory. Determination of sampling location by purposive sampling is based on the character of the environment in the location of the research. Based on the results of research that has been obtained an abundance value at the station 1 = 4,8 Ind/m2, station 2 = 8,7 Ind/m2, and station 3 = 3 Ind/m2. The pattern of blood shell levy in the waters of Concong Luar Village stations 1 and 2 is clustered, while station 3 is evenly distributed. Furthermore, the results of measurement of the width of the highest blood shells are 16 - 30 mm in 70 individuals, followed by size >31 mm in 43 individuals, the lowest measurement result is <15 mm in 27 individuals and the highest measurement of the length of the blood shells 16 – 30 mm of 77 ind, followed by a size >31 mm of 42 ind, and the lowest measurement result is <15 mm of 29 ind.
Size and Distribution of Bivalva in the Interidal Zone in Sambungo Village, Silaut District, Pesisir Selatan Regency, West Sumatera Province Silaban, Tulus Gandra Saputra; Tanjung, Afrizal; Siregar, Yusni Ikhwan
Journal of Coastal and Ocean Sciences Vol. 3 No. 2 (2022): May
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/

Abstract

This research was carried out in January 2021 in the Intertidal Zone of Sambungo Village, Silaut District, Pesisir Selatan Regency, West Sumatra Province. The purpose of this study was to determine the size variation of the bivalve, the distribution pattern of the bivalve, the effect of the type of sediment fraction on the size, and the distribution of the bivalve in the intertidal zone. The method used in this research is a survey method which is carried out by direct observation and sampling in the field. Bivalve samples obtained were identified at the Marine Biology Laboratory and Sediment Fraction Analysis was carried out at the Chemical Analysis Laboratory, Faculty of Fisheries and Marine, Universitas Riau. Based on the results of the study, the highest number of bivalves was at station 1 as many as 11 individuals. The distribution pattern of macrozoobenthos in the intertidal zone of Sambungo Village ranges from 3.86 to 5.07 with the highest morisita index value being at station 1. The highest percentage of sediment fraction is 96.53% in the lower zone and the highest organic matter content is at station 1 of the lower zone. with a total percentage of 6.65%. Based on the criteria for the morisita index at station 1, station 2, and station 3 with an Id>1 value, it can be concluded that the distribution of Bivalvia in the intertidal zone in Sambungo Village is clustered.
Analysis of Coastal Line Changes in Coastal Area of the Pantai Cermin and Perbaungan Sub District, Serdang Bedagai District Ramadhan, Alif Ridho; Mubarak, Mubarak; Mulyadi, Aras
Journal of Coastal and Ocean Sciences Vol. 3 No. 2 (2022): May
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/

Abstract

This research was conducted in January 2021 in the Coastal Area of ​​ Pantai Cermin and Perbaungan Districts, Serdang Bedagai Regency. The purpose of this study is to analyze shoreline changes from 1985 to 2021 and predict shoreline changes for 2040 in the Coastal Area of ​​ Pantai Cermin and Perbaungan Districts, Serdang Bedagai Regency. The method used is the survey method. The analysis was carried out using the Digital Shoreline Analysis System (DSAS) The results showed that the Coastal Area of Pantai Cermin and Perbaungan District, Serdang Bedagai Regency had experienced 89.62% abrasion and 10.38% accretion. With this, it can be seen that the Coastal Areas of Pantai Cermin and Perbaungan Subdistricts have mostly experienced an abrasion. Oceanographic factors in the waters of the Malacca Strait, such as currents and waves, the existence of poor mangrove forests, sloping water topography, and human activities in every part of the research area. Prediction results of shoreline changes in 2040 the abrasion are 319.1 m, while the accretion is 239.7 m.
Phytoplankton Community Structure in Carocok Tarusan Beach Pesisir Selatan Regency West Sumatra Province Adrizal, Taufik; Siregar, Sofyan Husein; Nurrachmi, Irvina
Journal of Coastal and Ocean Sciences Vol. 3 No. 2 (2022): May
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/

Abstract

The existence of phytoplankton in the aquatic environment greatly affects aquatic life itsself. Through photosynthesis, phytoplankton is responsible for producing oxygen and nutrients, especially for other marine organisms. Furthermore, phytoplankton can be indicators of fertility and the quality of an aquatic ecosystem. The waters of Carocok Tarusan beach have congested anthropogenic activities, like shipyard and shipping, tourism, and domestic activities. This of course greatly affects the existence of phytoplankton which is very dependent on environmental conditions. This study aims to determine the structure of the phytoplankton community and its relation to the characteristics along with the quality of the waters in Carocok Tarusan beach. Phytoplankton samples were collected by using plankton net number 25 at three stations that have been determined by the purposive sampling method. The results showed that the temperature values ranged from 29.3-29.7ºC, salinity 27.7-31.3‰, brightness 1.8-3 m, pH 7, 0.3-0.6 m/s. There are 12 species from 3 classes found. The most common species found were Navicula sp, Synedra ulna sp., and Isthmia sp. The average abundance of phytoplankton at each station is 57.86-92.58 Ind/L. The results of the ANOVA test on the abundance of phytoplankton showed a significant value of 0.108, which means the P value> 0.05, this indicates that there is no significant difference in the abundance of phytoplankton between stations. The value of the species diversity index (H') of phytoplankton has an average value of 1.7436 - 2.0028. The Uniformity Index (E) has an average value ranging from 0.1393 to 0.1464. Meanwhile, the phytoplankton dominance index shows an average value of 0.2661 – 0.3191.

Page 25 of 30 | Total Record : 293

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