Foraminifera Bentik Dalam Sedimen Sebagai Indikator Kondisi Lingkungan Terumbu Karang Di Perairan Pulau Cemara Besar Dan Cemara Kecil Kepulauan Karimunjawa Jawa Tengah

Gustiantini, Luli; Ilahude, Delyuzar

doi:10.32693/jgk.10.1.2012.213

Cited by 3 publications

(4 citation statements)

References 2 publications

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“…This connectivity can answer the accretion level on the east side which is very high, as long as the sediment supply originates from Karimun Island at a rate that effective during the east and transition seasons II. This is in accordance with Gustiantini & Ilahude (2016) in the map presented illustration if Cemara Besar Island has the same sediment distribution as Karimun Island, which is muddy mud.…”

Section: Viewed Insupporting

confidence: 91%

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Shoreline Change Dynamics using Digital Shoreline Analysis in Cemara Besar Island

Ramdhan

Yulius

Kholik

2020

segara

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This paper will describe a study to find out the shoreline changes that occurred on Cemara Besar Island along with the accretion and abrasion. Data taken from the images was obtained through google earth as a result of radiometry and geometry correction from Landsat satellites in the last 5 years. Wind data is obtained from ecmwf interm every season for 5 years. Analysis of shoreline changes was carried out using the DSAS (Digital Shoreline Analysis) method and analyzed by wind and sea wave factors in each season. The results of the analysis obtained LRR and EPR values for 5 years, the extent of changes in island land mass, the value of Hs and Ts from the results of wave forecasting using wind data. To simplify the analysis, Cemara Besar Island is divided into 9 segments based on variations in LRR values. The results show that in general Cemara Besar Island have very high accretion in segments A, B and E with an average of 3.61 m and very high abrasion occurred in segment F with an average of -1.01 m. Abrasion occurs with the greatest speed of change in segment A with an average of 4.64 m/year and the largest accretion rate in segment F with an average of -1.21791 m/year. Analysis of oceanographic factors through wave forecasting shows that in the west and transition I season, waves occur with Hs 1.21 m, greater than the eastern season and transition II season with Hs 0.91 m. wind direction from north dominant direction 377.50 in west season and transition I, and from east direction 67,25 in east season and transition I season. Direction of wind blowing influences wave propagation and direction of wave coming towards shore which affects sediment transport which produces accretion and abrasion on the Cemara Besar Island.

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Section: Viewed Insupporting

confidence: 91%

“…Sediment cover on the majority island of gravel mud with distribution to Karimun Island and Menjangan Island. Furthermore sediment in the form of alluvium is typically composed of crust, gravel, sand, clay, coral fragments, and pumice (Gustiantini & Ilahude, 2016).…”

Section: Introductionmentioning

confidence: 99%

Shoreline Change Dynamics using Digital Shoreline Analysis in Cemara Besar Island

Ramdhan

Yulius

Kholik

2020

segara

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“…Tiap tahunnya kondisi terumbu karang semakin menurun akibat banyaknya aktifitas manusia. Kondisi yang dapat terjadi antara lain seperti kerusakan terumbu karang akibat limbah dan sampah rumah tangga (Gustiani dan Ilahude, 2012). Rusaknya terumbu karang dapat mengakibatkan terganggunya fungsi-fungsi ekologis terumbu karang yang sangat penting.…”

Section: Pendahuluanunclassified

Pengaruh Kedalaman Terhadap Produktivitas Primer Dan Densitas Zooxanthellae Pada Karang Dominan Di Pulau Cemara Kecil, Karimunjawa

Lakastri

Purnomo

Muskananfola

2018

Manage. Aqua. Resourc.J

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Pulau Cemara Kecil merupakan salah satu pulau yang dijadikan tujuan wisata di Kepulauan Karimunjawa. Terumbu karang merupakan ekosistem pesisir yang memiliki produktivitas tinggi. Nitrat merupakan nutrien sebagai salah satu faktor penentu terpeliharanya produktivitas perairan. Penelitian ini mempelajari perbedaan jumlah sel zooxanthellae yang berpengaruh terhadap nilai produktivitas primernya dan kandungan nitrat yang diserap terhadap perbedaan kedalaman. Tujuan penelitian ini untuk mengetahui perbedaan produktivitas primer bersih (NPP) ekosistem terumbu karang, kandungan nitrat dan densitas zooxanthellae pada kedalaman 1 meter dan 5 meter. Penelitian ini dilaksanakan di Pulau Cemara Kecil pada bulan Maret 2018 dengan metode deskriptif. Hasil penelitian yang diperoleh jenis karang yang dominan adalah Acropora sp. (26,58%) dan Porites sp (40,38%) dengan tutupan karang hidup pada kedalaman 1 meter (70,5%) kategori baik, kedalaman 5 meter (76,83%) kategori sangat baik. Terdapat perbedaan yang signifikan (sig.) pada densitas zooxanthellae (sig = 0,02) dan NPP (sig = 0,01) di kedalaman 1 meter dan 5 meter pada kedua jenis karang. Perbedaan yang kurang signifikan pada konsentrasi nitrat (sig = 0,395) pada kedua kedalaman. Nilai densitas Zooxanthellae dan NPP lebih tinggi pada kedalaman 1 meter dibandingkan kedalaman 5 meter. Kedalaman mempengaruhi jumlah sel zooxanthellae pada karang sehingga akan berpengaruh terhadap produktivitas primer yang dihasilkan. Penyerapan kandungan nitrat oleh zooxanthellae berbeda dipengaruhi oleh faktor fisika kimia lingkungan. Pulau Cemara Kecil is one of the island used as a tourist destination in Karimunjawa. Coral reef are coastal ecosystems that have high productivity. Nitrate is a nutrient as a determining factor for the preservation of marine productivity, nutrients becomes an important factor. This research will study the differences in zooxanthellae cells that effected on their primary productivity value and nitrate absorbed by the depth difference. The purpose of this research is to know the differences of coral reef Net Primary Productivity (NPP), nitrate concentration and density of zooxanthellae at depth of 1 meter and 5 meter. This study was conducted in Cemara Kecil Island on March 2018, with descriptive method. The research results obtained are the dominant species of coral Acropora sp. (26,58%) and Porites sp. (40,38%) with living coral cover at a depth of 1 meter (70,5%) categories are good, the depth of 5 meter (76,83%) categories are very good. There is a significant difference (sig) on the density of zooxanthellae (sig = 0,03) and NPP (sig = 0,01) at a depth of 1 meter and 5 meters on both types of coral. Less significant differences in the concentration of nitrates (sig = 0,395) on both the depth. Zooxanthellae densities values higher than NPP at a depth of 1 meter compared to a depth of 5 meters. Depth affect the density of zooxanthellae on corals so influential is also against the resulting primary productivity. Absorption of different content of nitrate by zooxanthellae are influenced b factors of chemical – physics environment.

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“…Benthic foraminifera, through the application of the FoRAM (Foraminifera in Reef Assessment and Monitoring) Index, have been used as part of monitoring the marine environments in areas with coral reefs, in a wide range of areas around the globe. In Indonesia, this index has been applied by several researchers (Natsir, 2010;Dewi and Darlan, 2008;Toruan et al, 2013;Aulia et al, 2012;Gustiani and Ilahude, 2012;Paringgi et al, 2018;Kalalo et al, 2020), and here we apply it to Manado Bay.…”

Section: Introductionmentioning

confidence: 99%

FoRAM Index in Manado Bay coral reef areas, Northern Sulawesi, Indonesia

et al. 2022

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Benthic foraminifera are protozoans that are readily preserved in marine sediments. The relative proportion of benthic foraminifera that harbor symbionts compared to the proportion that are opportunistic or small/heterotrophic can be used to indicate the quality of the aquatic environment for coral reefs via the FoRAM Index (Foraminifera in Reef Assessment and Monitoring). This study assesses the functional composition of benthic foraminifera in the waters of Manado Bay using the FoRAM Index. Sampling was carried out at 4 stations with 3 replicates each using SCUBA equipment at a depth of 3-6 meters. The 4,124 benthic foraminifera specimens collected were distributed over 37 genera and the FoRAM Index ranged from 1.90 to 9.12. The water conditions at three of the stations (Meras, Molas, and Malalayang) are very conducive to the growth of coral reefs, with FoRAM Index values ranging from 5.64 to 9.12, while at the Sario station the FoRAM Index value was only 1.90 to 2.04, indicating that this aquatic environment is unsuitable for the growth and development of coral reefs.

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Foraminifera Bentik Dalam Sedimen Sebagai Indikator Kondisi Lingkungan Terumbu Karang Di Perairan Pulau Cemara Besar Dan Cemara Kecil Kepulauan Karimunjawa Jawa Tengah

Cited by 3 publications

References 2 publications

Shoreline Change Dynamics using Digital Shoreline Analysis in Cemara Besar Island

Shoreline Change Dynamics using Digital Shoreline Analysis in Cemara Besar Island

Pengaruh Kedalaman Terhadap Produktivitas Primer Dan Densitas Zooxanthellae Pada Karang Dominan Di Pulau Cemara Kecil, Karimunjawa

FoRAM Index in Manado Bay coral reef areas, Northern Sulawesi, Indonesia

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