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SEDIMENT ORGANIC MATTER CONTENT BASED ON THE DIFFERENT AGES OF MANGROVE VEGETATION IN THE LANTEBUNG MANGROVE ECOTOURISM AREA, MAKASSAR Mashoreng, Supriadi; Hatta, Muh.; Rusti, Rusti
Jurnal Ilmu Kelautan SPERMONDE VOLUME 8 NUMBER 1, 2022
Publisher : Hasanuddin University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20956/jiks.v8i1.19589

Abstract

Salah satu peran ekosistem mangrove bagi lingkungan adalah sebagai penyedia bahan organik melalui serasah yang jatuh. Serasah tersebut sebagian besar didekomposisi oleh bakteri pada sedimen, sebagian lainnya diekspor ke ekosistem lain dan sebagian kecil dimanfaatkan langsung oleh biota. Kandungan bahan organik pada sedimen diduga berkaitan dengan umur vegetasi mangrove. Penelitian dilakukan di kawasan ekowisata mangrove Lantebung Kota Makassar. Sebanyak empat stasiun sampling dibuat untuk menganalisis kandungan bahan organiknya. Stasiun tersebut ditempatkan berdasarkan jarak dari darat dengan asumsi bahwa semakin jauh dari darat, maka umur vegetasi mangrove semakin muda. Analisis bahan organik pada sedimen dilakukan menggunakan metode pembakaran pada suhu tinggi. Hasil penelitian menunjukkan terdapat tiga jenis mangrove yaitu Avicennia marina, Rhizophora mucronata dan Excoecaria agallocha. Jenis A. marina dominan pada bagian dalam dan tengah, sedangkan R. mucronata dominan pada bagian luar. Kandungan bahan organik sedimen berkisar 5,77-7,40% dengan rata-rata 6,68±0,68%. Pada lapisan sedimen 0-30 cm, terlihat bahwa semakin muda umur vegetasi mangrove maka kandungan bahan organik semakin kecil. Namun pada lapisan sedimen di bawahnya kandungan bahan organik relatif sama antar umur vegetasi yang berbeda. Total bahan organik pada kawasan mangrove Lantebung yang dijadikan sebagai area ekowisata (6,5 ha) sebesar 2.769 ton atau rata-rata 426 ton per hektar.
DENSITY AND DISTRIBUTION PATTERNS OF FULL-BLOODED CLAM (GELOINA EXPANSA; MOUSSON, 1849) IN MANGROVE ECOSYSTEMS Syahputri, Nuryani Khadijah; Mashoreng, Supriadi; Haris, Abdul; Rani, Chair; La Nafie, Yayu A.
Jurnal Ilmu Kelautan SPERMONDE VOLUME 9 NUMBER 1, 2023
Publisher : Hasanuddin University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20956/jiks.v9i1.19757

Abstract

Geloina expansa is a clam found in mangrove forests. The high level of public consumption and high economic value, is suspected as the cause of overfishing. It is not impossible that continuous harvesting will result in a decrease in the population of G. expansa. The habitat of G. expansa has experienced a lot of land conversion and this will result in a decrease in the natural carrying capacity of its habitat. The purpose of this study was to determine the distribution and density, distribution pattern and size distribution of the population of G. expansa based on the ecology of its habitat in West Malangke waters. The method was carried out randomly, the transect was placed in a 5x5 m2 sample plot with 3 replications and collected directly by hand. Sampling was carried out on each plot at the lowest ebb. Environmental parameters measured in the field included salinity, temperature and substrate while parameters measured in the laboratory were total organic matter (TOM). The density value of G. expansa in the intertidal zone was 9.90 ind/m2 while in the subtidal zone it was 0.78 ind/m2. The distribution pattern found in the intertidal and subtidal zones is clustered. The size distribution of G. expansa in the intertidal zone found that the dominant G. expansa was adult size, and the lowest was in the old size class while in the subtidal zone the dominant size was young and the lowest was in the old size class. Zone and type of substrate affect the existence of G. expansa. G. expansa was found more in the intertidal zone than in the subtidal zone and clay-type of substrates were a determining factor for the presence of full-blooded clams while clay and sand-type substrates were limiting factors for the presence of full-blooded clams.
SENTINEL IMAGE APPLICATION FOR ASSESSMENT OF MACROALGAE CONDITIONS AT BONE MALAYA, MAKASSAR CITY 2015-2020 Raj, Mayang Nizhar; Selamat, Muh Banda; La Nafie, Yayu Anugrah; Nurdin, Nurjannah; Mashoreng, Supriadi
Jurnal Ilmu Kelautan SPERMONDE VOLUME 8 NUMBER 2, 2022
Publisher : Hasanuddin University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20956/jiks.v8i2.19864

Abstract

This study was aimed to analyze and map the presence and percent cover of macroalgae in Bone Malalaya to determine the condition before and after the construction of the new port, as well as to analyze the distribution of suspended solids loads and environmental parameters and their relationship to changes in macroalgae cover in Bone Malalaya. The image used in this research is sentinel imagery 2A level 2A with the acquisition date of 28 October 2015, 14 July 2018 and 10 December 2020 which was processed using geographic information software to obtain a map of algae cover in Bone Malalaya. Sampling of water and physical parameters at the research location was carried out at 8 sampling stations, while algae sampling stations were carried out at 3 stations and 9 substations. There were no seagrass found in the research location, but algae species of  Sargassum sp. With cover changes based on the calculation of image pixels, namely 36.49 Ha in 2015, 26.45 Ha in 2018 and 35.73 Ha in 2020. The highest Total Suspended Solid value at the study site was at station 8 with a value of 33.1 mg/L and the lowest value was at station 1 with a value of 16.3 mg/L. Seagrasses were not found at the research site due to unsupported physical parameters and port activities that interfere with seagrass life. The presence of macroalgae Sargassum sp at the research site is assumed because Sargassum sp has a high tolerance for physical parameters that exceed the quality standards set by the Ministry of Environment in 2004.  
METABOLISM CHARACTERISTICS OF SEAGRASS HALOPHILA SPINULOSA: CARBON DIOXIDE ABSORPTION RATE IN PHOTOSYNTHESIS AND OXYGEN USE IN RESPIRATION Mashoreng, Supriadi; Rahman, Much. Faizal; Sadlie, Airine Universe; Tahir, Jasminati Nur
Jurnal Ilmu Kelautan SPERMONDE VOLUME 8 NUMBER 2, 2022
Publisher : Hasanuddin University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20956/jiks.v8i2.23133

Abstract

One of the roles of seagrass is as a carbon sink so its presence in the waters is very important. Each species of seagrass has a different character related to photosynthesis and respiration. The study was conducted to analyze the rate of carbon dioxide uptake in photosynthesis and the rate of oxygen use in respiration of Halophila spinulosa seagrass. The research was conducted in July 2022 in Puntondo Waters, Takalar Regency, South Sulawesi. Seagrasses were taken whole from waters 1 meter deep and then cleaned. The method used to analyze carbondioxide uptake and oxygen use was oxygen changes using clear and dark bottles. Each one shoot of H. spinulos was incubated using a clear and dark glass bottle with a volume of 270 ml. Incubation was carried out at 09.20 WITA (Middle Indonesian Time) - 12.20 WITA at a depth of 50, 100 and 150 cm with 5 replicate bottles at each depth. In addition, incubation of seawater (containing phytoplankton) was also carried out with 5 replicate bottles as a correction. At the beginning of incubation, the dissolved oxygen concentration in the water was measured. After incubation, oxygen was measured in clear and dark bottles. Seagrass leaves that have been used were scanned and analyzed using Image-J software to determine the extent. Seagrass leaves were dried in the oven, then weighed to determine the biomass. The results showed that carbon dioxide uptake per shoot ranged from 0.53 to 0.84 mgCO2/shoot/hour, per biomass 12.98-28.34 mgCO2/g/hour, and per leaf area 0.02-0.05 mgCO2/cm2/hour. The highest rate of carbon dioxide uptake was at a depth of 150 cm, both carbon uptake per shoot, biomass and leaf area. In contrast to the absorption of carbon dioxide, the rate of use of oxygen for respiration is highest at a depth of 50 cm. The use of oxygen per shoot ranged from 0.078-0.157 mgO2/shoot/hour, per leaf biomass 2.227-3.091 mgO2/g/hour and per leaf area 0.006-0.010 mgO2/cm2/hour.
ANALYSIS OF THE OCEANOGRAPHIC CONDITIONS OF MEOSBEKWAN ISLAND (RAJA AMPAT DISTRICT) FOR THE SUITABILITY OF SEAWEED CULTIVATION Lanuru, Mahatma; Amri, Khairul; Mashoreng, Supriadi; Dahlan, Dahlan; Paulangan, Yunus
Jurnal Ilmu Kelautan SPERMONDE VOLUME 9 NUMBER 2, 2023
Publisher : Hasanuddin University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20956/jiks.v9i2.27367

Abstract

Seaweed cultivation is an alternative community livelihood that potentially helping to reduce pressure on coral reefs in the area of Raja Ampat Archipelago. This study was aimed to conduct an oceanographic analysis of the waters of Meosbekwan Island (Raja Ampat Regency) for the suitability of seaweed cultivation. Oceanographic data collection was carried out at three points (M1, M2, and M3) on the western side of Meosbekwan Island. Analysis of suitability for aquaculture was initiated with an analysis of key parameters, i.e., depth, protection and shipping traffic. The suitability analysis was followed by an analysis of the oceanographic parameters of the waters by weighting them using a ranking system. Furthermore, the final stage of suitability analysis was to evaluate the feasibility level of seaweed cultivation. The results showed that the depth of the waters on the western side of Meosbekwan Island ranged from 1.3 m – 5.8 m with an average depth of 1.5 m in the south (M1), 2.2 m in the middle (M2), and 3.9 m to the north (M3). Wave height during the study ranged from 0.1 – 0.3 m with an average value of 0.25 m at all points. The velocity of the water currents ranged from 0.08 – 0.25 m/s. The salinity of the waters was relatively homogeneous (30 - 31 o/oo). Water temperature also has small and relatively homogeneous variations with a range of 30 - 31˚C. The brightness of the waters ranged from 2.5 – 3.5 m. The bottom of the waters on the west side of Meosbekwan Island generally consists of coarse sand, rubble, and seagrass vegetation Enhalus acoroides and Cymodocea sp. In general, the oceanographic conditions of the waters are suitable for the life and growth of seaweed. The results of the location suitability evaluation indicated that the waters on the western side of Meosbekwan Island were technically feasible to serve as a location for seaweed cultivation.