DEPIK Jurnal Ilmu-Ilmu Perairan, Pesisir dan Perikanan
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Potential resources through the suitability and tourism carrying capacity of Kurenai Beach, Bone Bolango Regency
Full text linkThe lack of information regarding the existence of potential natural resources supporting tourism activities and the suitability and capability of resources to support the implementation of good tourism activities can be a factor that hinders the sustainability of tourism in Kurenai Beach. Beach tourism activities can make a positive contribution to economic growth and the level of community welfare. On the other side, these activities also negatively impact the sustainability of coastal resources. For this reason, it is necessary to limit the tourists according to the carrying capacity of Kurenai Beach. This research gave the initial information to support the sustainability and management of Kurenai Beach tourism, Bone Bolango Regency. This research aims to determine potential resources through regional suitability and carrying capacity. Further, it is expected that the result of this study can be used as a recommendation in preparing a tourism development policy plan for Kurenai Beach, Bone Bolango Regency. The research was conducted from March to August 2023 in Tomini Bay waters, Kurenai Beach. This is a survey and interview research. The types of data used in this research were primary and secondary. The analysis used in this research was suitability analysis and carrying capacity analysis to determine the resource potential of Kurenai Beach. The research results showed that the suitability of Kurenai Beach tourism in the beach recreation category was divided into 3 (three) suitability categories, namely very suitable (S1), suitable (S2), and not suitable (S3). The carrying capacity of the Kurenai Beach tourist area could accommodate around 33,840 people/month. Kurenai Beach has some potential resources that are very suitable for beach tourism, amounting to 15,379 m2 and the total visitors of Kurenai Beach has not exceeded the carrying capacity of the Kurenai Beach tourist area so optimizing its use and management is highly possible.Keywords:Natural resourcesSustainable tourismTomini BayBotubarani Villag
Study on water quality based on physicochemical parameters and distribution of waste in the waters of Kelapa Dua Island
Full text linkKepulauan seribu archipelago is home to Kelapa Dua Island, a potential marine tourism destination and habitat for diverse marine life. The survival of marine biota hinges on suitable physical and chemical water parameters, encompassing temperature, pH, salinity, and dissolved oxygen (DO). This study aims to evaluate water quality and litter distribution on Kelapa Dua Island within Kepualauan Seribu National Park. Results reveal that the water quality largely aligns with established standards; however, specific points surpass limits, notably lower salinity at stasion 3 (26%o), and higher pH at station 2 (9.35). Despite meeting quality standards, the island's status as a populated area and tourist destination raises concerns about potential alterations to water quality. Furthermore, observations on litter distribution indicate a status categorized as B (0-4/m) and C (4-10/m), highlighting a relatively low level of litter presence. The interaction of human activities, both as inhabitants and visitors, may contribute to fluctuations in water quality. Understanding these dynamics is crucial for sustainable management, ensuring the preservation of Pulau Kelapa's ecological integrity as a cherished marine environment and tourist attraction. This study provides insights into the delicate balance between human interactions and environmental preservation in the context of Pulau Kelapa, Kepualauan Seribu.Keywords:Water qualityLitter DistributionKelapa Dua IslandKepulauan Serib
Analysis of abundance and ditribution of parrotfish (Leptoscarus vaigiensis) in seagrass ecosystems in Muris Besar Village, Demta District, Jayapura Regency, Papua
Full text linkParrotfish is the speciesLeptoscarus vaigiensis. Leptoscarus vaigiensisis a species of fish found in Muris Besar Village's waters, and it lives in seagrass meadow areas. This study aims to find parrot fish species abundance and distribution (Leptoscarus vaigiensis) in seagrass environments. Benefits from this research are anticipated to include supporting data and information, particularly for the fisheries industry in this water area, and significant information for preserving seagrass ecosystems as a specialized habitat for parrotfish (Leptoscarus vaigiensis). The Water Visual Census (UVC) is used to assess parrot habitat in the waterways. Direct observation at the research site is used to learn about and gather data about the object under study. Counting stationary points, transects, timed swimming at stationary sites, divers remaining in one location and surveying a specified radius for a certain amount of time are the major categories into which UVC methods fall. The research locations are Waipa Beach, Ugape Cape, Augara Beach, Muris Besar Village, Demta District, Jayapura Regency, Papua. The highest abundance value is at station 1, with an abundance value of 1,300 ind/m, while the lowest is at station 2, with an abundance value of 700 ind/m. Leptoscarus vaigiensis has a species distribution with a morality index value between 0.33 and 0.50. The distribution of parrotfish (Leptoscarus vaigiensis) in seagrass ecosystems is categorized as comparable according to the criteria for distribution patterns.Keywords:DistributionParrotfishMuris Besar VillagerAbundanceSeagrass bed
Analysis of water quality in watershed using heavy metal pollution index
Full text linkThe quality of rivers and coastal is gradually deteriorating along with rapid population and socio-economic growth in the watershed to the estuary. Sampling was conducted in Semarang city rivers and Demak district rivers, Central Java Province, Indonesia, at four different stations according to geography and designation: river basins, estuaries, and rivers affected by industrial and domestic waste. Research time is August - October 2023 during the dry season. The research method uses descriptive analysis to determine the variables to be studied based on the research results in the field. River and coastal pollution levels are measured using the Heavy Metal Pollution Index method, with several water quality parameters measured, such as BOD, COD, Ammonia, TDS, TSS, and Total Coliform. In contrast, the heavy metal parameters measured are Cd, Ni, Zn, Cu, and Pb. The heavy metals and water quality parameters analyzed guided by Government Regulation of the Republic of Indonesia Number 22 of 2021 class 2. Water quality and heavy metal analysis use the Heavy Metals Pollution Index (HPI). HPI is an assessment method that shows the influence of individual heavy metal compounds on overall water quality. The results show that the status of non-metal water quality in terms of HPI analysis shows that Sampling Station (SS) 1 is 224.30 (unsuitable for drinking), SS 2 is 645.98 (unsuitable for drinking), SS 3 is 320.09 (unsuitable for drinking), SS 4 is 252.09 (unsuitable for drinking), and metal parameters in terms of HPI analysis show that SS1 is 26.43 (good), SS2 is 2345.84 (unsuitable for drinking), SS3 is 26.43 (good), and SS4 is 12.64 (excellent). The conclusions from these four research areas indicate that the status of water quality, according to the HPI is unsuitable for drinking, however, indications of heavy metals in 2 areas are still tolerable, namely good and excellent. The decline in water quality in the research area is caused by domestic and industrial waste polluting the waters. In conclusion, this river area requires further management from the collaboration of various stakeholders.Keywords:Water QualityHeavy MetalCoastalWatershe
Suitability water quality parameters for Eucheuma cottonii culture at Majene Waters
Full text linkSeaweed cultivation in Majene Regency, West Sulawesi, has not experienced significant development as in neighboring Polewali Mandar and Mamuju Regency. This can be seen from the absence of active seaweed cultivation activities in Majene Regency. The aim of this research is to assess the physical and chemical aspects of water to determine the suitability of locations for cultivating Eucheuma cottonii seaweed in Majene waters. The method used to measure ecological suitability included parameters such as temperature, salinity, dissolved oxygen (DO), pH, phosphate, nitrate and salinity. Subsequently, the data is scored to determine suitability classes: suitable (S1) with values ranging from 37 to 48, moderately suitable (S2) with values between 36 and 25 and non sultable (S3)/N) with value 25. The results showed that after applying weighting and scoring, locations such as East Banggae, Pamboang 1, Tubo Sendana, and Sendana 2 showed suitable scoring result with scores of 39, 39, 40, and 40. While locations such as Pamboang 2, Pamboang 3, Malunda, and Sendana 1 showed moderately suitable scoring results with scores of 33, 33, 34 and 36. Majene waters have potential areas for seaweed cultivation based on classes S1 (suitable) and S2 (moderately suitable).Keywords:SeaweedMajene WatersLocation SuitabilityWater QualityAquacultur
Phytoplankton Abundance and Distribution Chloropyll-a in Reservoir
No full textOrganic matter entering through the inlet and activities in the Koto Panjang Reservoir body is feared to be the main source of nutrient contribution in the form of nitrogen (N) and phosphate (P) for reservoir waters. Nutrients N and P are utilised by phytoplankton in the photosynthesis process. If this condition continues, it is feared that it will affect water quality (blooming algae) which has an impact on aquatic biota. This study aims to determine the type and abundance of phytoplankton along with the distribution of chlorophyll a in reservoir waters. This study used descriptive, qualitative and quantitative methods and analysed the distribution of chlorophyll a using surfer software. Based on the results of the study, it is known that water quality is relatively good with temperatures ranging from 26-310C, brightness ranging from 0.69-1.96 m, dissolved oxygen (DO) is 5.60-6.80 mg/L and turbidity is 1-6 NTU. The results showed that phytoplankton composition was composed of 5 classes consisting of Euglenophyceae (1 species), Cyanophyceae (3 species), Conjugatophyceae or Zygnematophyceae (4 species), Chlorophyceae (4 species) and Bacillariophyceae (10 species). The dominating class in the reservoir zonation is different. In the riverine zone the Bacillariophyceae class dominates by 60.06%, in the transition zone the Cyanophyceae class by 91.60% and in the lacustrine zone the dominating class is Conjugatophyceae or Zygnematophyceae by 78.69%. Phytoplankton abundance ranged from 166.5-2,193 sell/m3. The highest abundance was located in the lacustrine zone and the lowest abundance in the riverine zone. The distribution of chlorophyll a in Koto Panjang Reservoir is varied, the highest distribution is located in the transition zone to the lacustrine zone
Modeling sea currents in working environment area of Parit Rempak Karimun port
Full text linkSea currents is an important indicator, especially if permanent infrastructure to be built in waters area. Based on Government Regulation No. 21/2O21 Regarding the Implementation of Spatial Planning, it is mandatory to have licensing for Sustainability of Marine Spatial Utilization Activities (SMSUA). Therefore, Karya Karimun Mandiri Company collaborated with authors to conduct this research at Parit Rempak port. This research only focus to sea current and aims to determine the existing conditions of sea currents and their modeling in planned location for construction of LPG-GFS jetty pier. The analysis includes surface current conditions, sea currents based on NOAA data, sea current rose directions, sea current modeling, bathymetry maps and sediment condition, which use primary and secondary data. Primary data was measured at 6 research stations, which were then analyzed using Mike 21 software. The research results showed that: (a) existing conditions surface current speed at high tide ranges from 0.0 to 0.83 m/s towards the east, at low tide it ranges from between 0.07 to 0.64 m/s towards the west; (b) based on NOAA data, sea currents at research location move relatively regularly and in a direction towards southeast, which were speed of sea currents varies according to season, with a range of 0.0 m/s to 0.125 m/s, non-tidal so it is relatively not turbulent; (c) sea current modeling that maximum current speed is 0.25 m/s and minimum current speed occurs at highest tides and lowest low tides, with direction of current movement to southwest and northeast; (d) bathymetric conditions with a depth between 0-5 meters, constitute shallow water and sediment consist of mud, muddy sand and gravelly sand, are safe for building a LPG-GFS jetty pier. Based on the conditions of sea currents and data above, SMSUA permits is eligible to be granted and must be issued.KeywordsSea currentHydro-oceanographicJetty pierCoastal ecosystemMarine spatial planningPort of Parit Rempa
Identification coral reef diatom using scanning electron microscope at Nature Reserve Pulau Sempu (NRPS), East Java
Full text linkDiatom, Bacillariophyceae, has an important role in environmental support because these algae contribute to 25% of the oxygen supply globally and each year represent 40% of primary production by fixed carbon using photosynthesis. Diatom samples were obtained from 3 different sites in around NRPS. Cleaning diatoms analyzed using SEM for describe ultrastructure in diatom valves. Three dominant diatoms Cocconeidaceae and Bacillariaceae from the south Java Sea (Indian Ocean). Basic information regarding the diversity of diatoms, and the success of photoautotrophic micro-algae that can be found both in marine and freshwater habitats, is very important to describe the role of each taxon from an ecology perspective in the future. Samples are taken from the substrate of 3 stations in Nature Reserve Pulau Sempu and prepared in the laboratory for scanning electron microscopy photographs. Clear and detailed features diatom frustule of SEM photograph reveal a schild diatom (Cocconeis) and panduriform diatom (Psammodictyon) are dominating taxa in NRSP areas.Keywords:Hard coralCocconeisPsammodictyonPulau SempuDiato