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Elizal, Elizal
Universitas Riau
Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Earth & Planetary Sciences Economics, Econometrics & Finance Education Energy Environmental Science Immunology & microbiology Materials Science & Nanotechnology Physics Public Health Social Sciences Other

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THE RELATIONSHIP BETWEEN NITRATE AND PHOSPHATE CONTENT AND DIATOM ABUNDANCE IN THE WATERS OF PANDAN ISLAND, WEST SUMATRA Moulidia, Candri; Nedi, Syahril; Elizal, Elizal
Asian Journal of Aquatic Sciences Vol. 7 No. 2 (2024): August
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/ajoas.7.2.226-231

Abstract

This research was conducted in the waters of Pandan Island, West Sumatra, to determine the content of nitrates, phosphates, and diatom abundance and the relationship between nitrate and phosphate concentrations and diatom abundance. The method used is the survey method. The sampling station is determined by purposive sampling based on cardinality. Define the relationship between nitrate and phosphate content content and diatom abundance using simple linear regression. The results showed that there were eight species of diatoms with the class Bacillariophyceae, including Isthmia sp, Amphora sp, Closterium sp, Nitzschia sp, Hemiaulus sp, Asterionella formosa, Leptocylindrus sp. The highest diatom abundance was at station IV, with an average abundance value of 14.092,09 ind/L, and the lowest abundance was at station I, with an average of 5.317,77 ind/L. The relationship between nitrate concentration and diatom productivity was obtained with the value of y = 31.184x-15.082 and the correlation coefficient (r) = 0.711. Meanwhile, the phosphate concentration on diatom productivity was obtained with a value of y = 51.543x-32.477 and a relational (r) coefficient value = 0.738. There is a strong relationship between nitrate and phosphate content and diatom abundance in the waters of Pandan Island, West Sumatra.
CORAL REEF DISTRIBUTION MAPPING CASE STUDY OF SETAN ISLAND WATERS, WEST SUMATRA Pambudi, Bagas Ariya; Thamrin, Thamrin; Elizal, Elizal
Asian Journal of Aquatic Sciences Vol. 7 No. 2 (2024): August
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/ajoas.7.2.318-328

Abstract

The research was conducted in May 2023 in Setan Island, West Sumatra. The study aimed to map the distribution of coral reefs, test the accuracy of the resulting map, and determine the condition of coral reef cover on Setan Island. The methods used are remote sensing methods using Sentinel-2 satellite imagery and field survey methods to validate the distribution of coral reefs resulting from image data processing (Groundcheck) and to observe the condition of coral reefs using the Underwater Photo Transect (UPT) method. Determination of sampling locations to ground check the distribution of coral reefs using a Stratified random sampling method while determining sampling locations for observations of coral reef cover using a purposive sampling method. The study results obtained a coral reef distribution map with a reef distribution area of 13.18 ha or 47.55% of the total shallow water area. The accuracy test found an accuracy value of 80% with a kappa coefficient 0.7, where the category is good and the level of trust is moderate. The condition of coral reef cover based on live corals in the waters of Setan Island is in the Fair and Poor categories. Percentages range from 0.33% to 31.36%. The dominating lifeform types are coral massive and coral submassive.
THE RELATIONSHIP OF THE DISTRIBUTION OF SEA SURFACE TEMPERATURE WITH RAINFALL AND WIND IN THE WATERS OF WEST SUMATRA Azmiada, Zela; Elizal, Elizal; Mulyadi, Aras
Asian Journal of Aquatic Sciences Vol. 7 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/

Abstract

This research was carried out in February-March 2023 in the West Sumatra waters. It aimed to determine the variability of sea surface temperature, rainfall intensity, wind direction, and speed in the West Sumatra waters. Sea surface temperatures were taken from three stations, namely: in the coastal waters of Pariaman City, Padang-Pariaman Regency, and Bungus, Padang. The survey method was used, which was directly observed in the field. The results showed that the Sea Surface Temperature of the study areas ranged from 29.25oC-30.28oC, while the rainfall went from 211.97-499.89 mm, and the dominant speed was between 0.50-2.10 m/s. The correlation analysis between rainfall and sea surface temperatures in Station 1 yielded an "r" value of 0.871, a powerful correlation category, and the determination coefficient (R2) was 0.579 or 57.9% during the western season. In the east season, the "r" value was 0.321, in the moderate correlation category, and the determination coefficient was 0.103 or 10.3%. At Station 2, the correlation coefficient (r) was 0.788, a powerful correlation category, and the determination coefficient (R2) was 0.622 or 62.2% during the western season. In the east season, the "r" value was 0.699, a strong correlation category, and the determination coefficient was 0.488 or 48.8%. At Station 3, the "r" value was 0.688, a strong correlation category, and the determination coefficient was 0.477 or 47.7% during the western season. In the east season, the "r" value was 0.743, a strong correlation category, and the determination coefficient was 0.579 or 57.9%.
ABUNDANCE OF MARINE DEBRIS ON PADANG AND PARIAMAN BEACHES WEST SUMATRA PROVINCE Gusmanti, Afni; Nedi, Syahril; Elizal, Elizal
Asian Journal of Aquatic Sciences Vol. 7 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/

Abstract

Padang and Pariaman Beaches are regional strategic locations for tourism and have been growing rapidly. However, waste has become a significant concern because of its anthropogenic impact. This study aims to identify and analyze the types of waste abundance on both beaches of these tourist destinations. This research was conducted in August 2022 using a survey method. This study found eight types of waste in the two locations. They comprise plastic, metal, glass, wood, paper, rubber, and cloth fragments. The total fragment on Padang Beach reached 3,392 items/m2, higher during the weekend than before the weekend (1,212 and 1,072 items/m2). Meanwhile, the total fragment on Pariaman Beach reached 2,484 items/m2 and was higher during the weekends than after the weekends (0.956 and 0.74 items/m2). Moreover, there was no significant difference between the two locations (p>0.05). It might relate to the characteristics of the same water quality parameters: the current velocity ranges from 0.3-0.4 m/s (medium current), so it does not have a different effect.
BIVALVE COMMUNITY STRUCTURE IN THE INTERTIDAL ZONE OF PASUMPAHAN ISLAND PADANG CITY WEST SUMATERA PROVINCE Zani, Rahma; Tanjung, Afrizal; Elizal, Elizal
Asian Journal of Aquatic Sciences Vol. 6 No. 2 (2023): August
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/

Abstract

Bivalvia is a class of the Mollusca phylum. Bivalvia is also known as Pelecypoda and Lamellibrankhiata. Bivalvia occupies an area of the intertidal zone, one of which is in the intertidal zone of Pasumpahan Island. But information about bivalves in the area does not exist. To know/understand information about the density and distribution pattern of bivalves on Pasumpahan Island, this research was conducted in January 2022. The sampling area was in the intertidal zone of Pasumpahan Island. Sampling was carried out at three stations, each station was divided into three transects. Bivalve sampling was carried out using a 1 x 1mm sieve. The movement of bivalves to the gravel substrate is very fast to avoid splashing waves. Bivalves samples were then identified. The density of bivalves in the intertidal zone of Pasumpahan Island ranged from 1.78-3.56 Ind/m2. Station 2 has a higher density of bivalves, namely 3.56 Ind/m2, the calculation of bivalves in the intertidal zone of Pasumpahan Island obtained bivalves distribution pattern data in groups.
MACROZOOBENTHOS COMMUNITY STRUCTURE IN SETAN ISLAND, MANDEH TOURISM AREA, PESISIR SELATAN, WEST SUMATRA Al-Izhar, Muhammad; Tanjung, Afrizal; Elizal, Elizal
Asian Journal of Aquatic Sciences Vol. 6 No. 2 (2023): August
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/

Abstract

Macrozoobenthos are aquatic organisms that live on the bottom of the water. Macrozoobenthos can be tolerant or sensitive to environmental changes. Organisms that live relatively sedentary and have varying adaptability to environmental conditions. However, there is no information about macrozoobenthos on Setan Island in Mandeh Tourism Area. To know/understand information about the density and distribution patterns of macrozoobenthos on Setan Island, this study was conducted in January 2022. The sampling area is in the intertidal zone of Setan Island. Sampling was conducted at three stations, each station was divided into three transects. Macrozoobenthos sampling was done using a sieve measuring 1mm x 1mm. The movement of macrozoobenthos to the gravel substrate was relatively slow to avoid the waves. Macrozoobenthos samples were then identified. The density of macrozoobenthos on Setan Island ranged from 2.89-3.89 ind/m2. Station 2 has a higher macrozoobenthos density of 3.89 Ind/m2, the calculation of macrozoobenthos on Setan Island obtained data on the distribution pattern of macrozoobenthos in clusters.
ANALYSIS OF LAND COVER CHANGES IN MANGROVE VEGETATION USING LANDSAT IMAGE DATA IN COASTAL, SUNGAI APIT DISTRICT, SIAK REGENCY, RIAU PROVINCE Armanda, Armanda; Mubarak, Mubarak; Elizal, Elizal
Asian Journal of Aquatic Sciences Vol. 4 No. 2 (2021): August
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/

Abstract

This research was conducted in March-April 2021 in the Coastal District of Sungai Apit, Siak Regency, Riau Province. The purpose of this study was to analyze changes in the land cover area of ​​mangrove vegetation and mangrove vegetation index in Sungai Apit District, Siak Regency, Riau Province. The method used in this study is a survey method with the interpretation of Landsat image data recorded in 2000, 2005, 2010, 2015, 2020. The results of the study obtained that mangrove forests with the highest area were in 2000 with an area of ​​mangrove vegetation reaching 7990,586 ha and there was a decline with the lowest number in 2015 with a vegetation area of ​​486,43 ha and in 2020 the mangrove vegetation area of ​​497,511 ha. Overall as much as 79% of the mangrove forest area has been damaged and changed its function within a period of 20 years. The NDVI value in Sungai Apit District is moderate with a value of 0,3-0,5, the category of meeting with a value of 0,5-0,6, and the very dense category of 0,6-0,8.
ANALYSIS OF COASTLINE CHANGES ON THE POTENTIAL OF MANGROVE FORESTS ON BENGKALIS ISLAND, RIAU PROVINCE Nabilla, Lulu Mayna; Mubarak, Mubarak; Elizal, Elizal
Asian Journal of Aquatic Sciences Vol. 4 No. 2 (2021): August
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/

Abstract

This study was conducted from January to February 2021 in coastal areas of Bengkalis Regency that is in Riau Province. This study aims to know the coastline changes to the potency of mangrove forests in that area. Field data was collected by survey methods such as direct observation and questioners, and it used different times of satellite imageries to find out the coastline changes over time. The results showed that the coastline of this regency had changed as much as 1036 Ha in average from the year of 1988 to 2020. It was due to coastal abrasion, wave actions, and reduction of mangrove forests; the coastline change reached 12.02 meters per year as the highest. The mangrove forest in the region of this regency plays important roles to the local life, the local economy, and the coastal waters; it was for fishermen, charcoal production, coastal tourism, and transportation as well.
COASTAL VULNERABILITY ANALYSIS IN PADANG PARIAMAN REGENCY, WEST SUMATERA Ramadhan, Fauzi; Mubarak, Mubarak; Elizal, Elizal
Asian Journal of Aquatic Sciences Vol. 3 No. 1 (2020): April
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/

Abstract

This research was conducted in June to July 2019. It aimed to analyzed the vulnerability and the shoreline change of coastal area of Padang Pariaman Regency, West Sumatera Province. Survey method with direct field observations were applied and different satellite imageries were also used to find out the shoreline change of coast under study. The results showed that there five categories of changes, namely high and low accretion (>2.1 m yr-1; 1 - 2 m yr-1); stable condition (-1 to 1 m yr-1); and high and low erosion (<-2 m yr-1; -1 to -2 m yr-1). Furthermore, the percentages of coastal vulnerability of the areas under study can be classified into five categories such as Very Low Condition (17.27 %), Low Condition (39.68 %), Medium Condition (29.02 %), High Condition (8.88 %), and Very High Condition (5,75 %). In addition, the districts of Sungai Limau and Batang Gasan had very high vulnerability condition.
RELATIONSHIP BETWEEN SEDIMENT TEXTURE AND ABUNDANCE OF Telescopium telescopium IN THE MANGROVE ECOSYSTEM OF THE NYALO RIVER, PESISIR SELATAN, WEST SUMATRA Armani, Shanya Puthi; Tanjung, Afrizal; Elizal, Elizal
Asian Journal of Aquatic Sciences Vol. 5 No. 3 (2022): December
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/

Abstract

The research was conducted in October-November 2021 in the Nyalo River Mangrove Ecosystem, South Coast of West Sumatra, aiming to determine the characteristics of sediment texture, an abundance of Telescopium snails (Telescopium telescopium), and the relationship between sediment particle size. The abundance of mangrove snail populations. Habitat parameters measured include physical and chemical parameters of marine waters. Station determination using purposive sampling method. Sampling locations are divided into 3 collection points or stations that are considered to represent the study area with one transect at each station. Mangrove snails were sampled using a 3m x 3m plot with three subplots placed along the transect. The results showed that the type of substrate varied at each station. The average size ranges from 3.58 – 2.05 with very fine sand classification dominating. The abundance of the mangrove snail population ranged from 1.78–14.89 ind/m2. The correlation between sediment particle size and the abundance of mangrove snail populations is related but not closely related.
Co-Authors ', Zefendra Aditya, M Afrizal Tanjung Al-Izhar, Muhammad Amari, Tomi Andre Febriadi Zaryano, Andre Febriadi Andrian, Fikri Andriani, Fikri Anggie Agustian Apriani, Cici Aras Mulyadi Arbaeyah &#039; Ardiana, Eka Arif Teguh Satria Arinalhaq, Aminah Aristi, Fiona Armanda Armanda Armanda, Armanda Armani, Shanya Puthi Athhary, Dhiva Danaya Azmiada, Zela Azrihaironi, Azrihaironi Baruza Arrizqa Bayu Putra U Irawan Bintal Amin Cahyani Fitrah Tanjung Cici Lestari Manurung Cut Intan Zahara Darul Amin Debby Irfandinata Deddy Bahagia Manik Dedek Susanto Dedi . Dedi Muksin Pane, Dedi Muksin Desmarina, Y. Despela, Despela Dessy Yoswaty Dewita Dewita Dimas Agung Guntara Efriyeldi, Efriyeldi Elfis Suanto Fadhil, Yozi Ahmad fajar sidik Febrianto Roby Mukhti Fertikasari, Indah Fikri, Ishlahul Gaol, Amelia Risnauli br. Lumban Ginting, T.B. Giovano Aldizia Gusmanti, Afni Gustasya, Yosy Halida Sisda Harahap Hamidah Dasno Vera Handoyo, Edi Hari Mulyadi, Hari Harif, Ichwanul Hutabarat, Mona Uli Hutapea, Yeru Daniel Octryan Ibad, Rizky Nur Ide Rival Dianta Sitepu Ikhsan Setiawan Ilham Ilahi Indah Fertikasari Irfandi, Muhammad Adri Irvina Nurachmi Irwan Effendi Irwan Irwan Joko Samiaji Juliamanda, Ghina Juliando Saputra Khairil Ihsan Khoiriyah, Latifatul Lulu Mayna Nabilla Mahzwan Putra Pratama Manik, Everson Manik, Yolanda Marlan Tamba, Marlan Masyurah, Dzaitul Metry, Gita Mifdhol Hafli, Raja Diddin Moulidia, Candri Mubarak Mubarak Mubarak Mubarak Mubarak Mubarak Muhammad Sofyan Musrifin Galib Musrifin Ghalib Mutia, Safira Nababan, Bastian Vepry Odynata Nabila Afifah Azuga Nabilla, Lulu Nabilla, Lulu Mayna Ningrum, Astrid Kusuma Novhitasari Simbolon Novriadi, Yoga Nuriska, Alda Nuro, Syazliana Nursyirwani, Nursyirwani Ogesnain Sinaga Oriza, Syucitra Pambudi, Bagas Ariya Panjaitan, Sutrisno Pasaribu, Ridwan Saiful Basri Putri, Zulherija Rahdian Putra Rahmanda, Melysa Rahmi Relva Rahmita, R. Raja Yogi Prayoga Ramadhan Ramadhan Ramadhan Ramadhan Ramadhan, A.R Ramadhan, A.R. Ramadhan, Fauzi Raphita, Suci Ridwan Manda Putra Rifaldi Rifaldi, Rifaldi Rifardi Rio Aprialis Safitra Rizki, A. Romanta A. Tamba Romanta Andrianus Tamba Romauli, Junita Romel Kefriansa Putra Sanora, Fifi Saragih, Desra Agus Surya Sari, D.J. Satria Putra Anggara Seven, Diko Alafchan Sherly Ayunarita Sidabalok, Westy Yulia Sihotang, Nico Darminto Sihotang, Yula Elawati Simamora, Yohanna Beata Sinaga, Ade Ferdinus Sinaga, Ogesnain Situmorang, Ally Wibowo Sofyan H. Siregar Sofyan Husein Siregar Sri Dewi Utami Suci Monika Putri Sukendi Sukendi Syafruddin Nasution Syahril Nedi Syahwandi, Muhammad Tanjung, Cahyani Fitrah Tanjung, Cahyani Fitrah Thamrin &#039; Thamrin Thamrin Thamrin Thamrin Tiara Sri Mulawanti Tomi Suhendra Ulfa Rahmi Wahyu Novra Wanda Wahyudi Wahyudi Wendy, Lovvia Wenika Fitria Dona Yandra, Yoli Yanti, D.H. Yoga Novriadi Yozi Ahmad Fadhil Yusni Ikhwan Zani, Rahma Zientika, Zientika Zulkifli &#039; Zurma, Intan Alsyahkina