The Composition and Distribution of Benthic Foraminifera at Coral Reef Ecosystem in Thousands Island

Toruan, Lumban Nauli Lumban; Soedharma, Dedi; Dewi, Kresna Tri

doi:10.28930/jitkt.v5i1.7741

Cited by 2 publications

(5 citation statements)

References 11 publications

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“…The islands in the study area are located about ~60-70 km in the far northwest from the Jakarta Bay which make the environment is still suitable for reef to develop well. The previous research at Kotok Besar island (Natsir, 2010) and at Karang Bongkok island (Toruan et al, 2013) also concluded that the environment condition of both area are considered conducive for coral reef growth.…”

Section: Resultsmentioning

confidence: 92%

“…A similar condition also occurs in Onrust island near Jakarta Bay, exhibiting a bad condition of coral reef. The condition is shown by higher percentages of several opportunistic genera compared to that of genera associated with coral reef (Toruan et al, 2013 (Noor, 2003).…”

Section: Resultsmentioning

confidence: 99%

“…In other words, foraminifers can be argued as an indicator to determine the environmental conditions in terms of reef health (Schueth and Frank, 2008). As the area geographically located in Coral Triangle, therefore the analysis is applicable in Indonesian water as previously observed by Dewi, et al (2010), Natsir (2010), Natsir and Subkhan (2012) and Toruan, et al (2013).…”

Section: Introductionmentioning

confidence: 83%

“…In addition, Kepulauan Seribu water is also well-known as a place with a high growth of reef community where their variety and abundance as well as the ecosystem are considered as specific and unique among other locations in Indonesia. These virtues take Kepulauan Seribu into consideration as a conservation area as mentioned in Natsir (2010) and Toruan, et al (2013), other than the fact that a number of the islands in Kepulauan Seribu are already implied environmental quality degradation.…”

Section: Introductionmentioning

confidence: 99%

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Analyses of Foraminifers Microfauna as Environmental Bioindicators in Kotok Besar, Kotok Kecil and Karang Bongkok Islands, Kepulauan Seribu, Dki Jakarta Province

Nurdin¹,

Gustiantini²

2016

BoMG

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Kepulauan Seribu is a well-known destination of marine tourism in Indonesia. Inevitably, the place has been affected by human activities. Hence it is important to preserve and conserve the area so as it is still suitable for reef community to grow and develop. One of the methods to evaluate the feasibility for reef environment is calculated by FoRAM Index (FI) values. Benthic foraminifera as a tool for environmental bioindicators were collected from 15 marine surface sediment samples in the vicinity areas of Kotok Besar, Kotok Kecil and Karang Bongkok islands in Kepulauan Seribu to assess the FI values. Approximately 20 genera of benthic foraminifera were found in the study area. The genera are dominated by Amphistegina and Calcarina along with Operculina, Quinqueloculina, Peneroplis, and Discorbis. The finding signifies reef flat environment as the dominant morphology, although the presence of fore slope is also observed particularly at the western part of Kotok Besar island. The assemblages of Operculina and Quinqueloculina suggest that the abundance of benthic foraminifera is influenced not only by the morphology of seafloor, but also by tidal current and terrestrial influence. The FI formula using foraminifers found in the study area results values above 4, thus the area can be reviewed as a decent environment for reef growth and development. Keywords: benthic foraminifera; bioindicator; FoRAM Index; coral community; seafloor morphology Kepulauan Seribu terkenal sebagai tujuan wisata laut di Indonesia, sehingga dapat dipastikan tempat ini dipengaruhi oleh aktifitas manusia. Oleh sebab itu sangat penting untuk menjaga dan melindungi kelestarian lingkungannya sehingga tetap cocok bagi komunitas karang untuk hidup dan berkembang. Salah satu metode untuk mengevaluasi kelayakan lingkungan terumbu adalah dengan menghitung nilai FoRAM Index (FI). Untuk analisis ini, foraminifera bentik dikoleksi dari 15 sampel sedimen permukaan laut dari daerah sekitar Pulau Kotok Besar, Kotok Kecil dan Pulau Karang Bongkok di Kepulauan Seribu. Hasil penelitian menunjukkan sekitar 20 genera foraminifera bentik yang ditemukan di daerah penelitian. Foraminifera didominasi oleh Amphistegina dan Calcarina, sedangkan jenis lain yang juga cukup berlimpah adalah Operculina, Quinqueloculina, Peneroplis, dan Discorbis. Hal ini menunjukkan lokasi penelitian memiliki jenis morfologi rataan karang sebagai morfologi dominan, walaupun kehadiran lereng karang (fore slope) juga teramati terutama pada bagian barat pulau Kotok Besar. Distribusi kelimpahan Operculina dan Quinqueloculina menunjukkan bahwa kelimpahan foraminifera bentik selain dipengaruhi oleh morfologi dasar laut juga dipengaruhi oleh pasang surut dan pengaruh terestrial. Hasil perhitungan FI berdasarkan foraminifera di wilayah penelitian menunjukkan nilai FI > 4 sehingga daerah ini dapat ditinjau sebagai lingkungan yang layak untuk pertumbuhan karang dan perkembangannya. Kata kunci: foraminifera bentik; bioindikator; FoRAM Index; komunitas koral; morfologi dasar laut

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Section: Resultsmentioning

confidence: 92%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 83%

Section: Introductionmentioning

confidence: 99%

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Analyses of Foraminifers Microfauna as Environmental Bioindicators in Kotok Besar, Kotok Kecil and Karang Bongkok Islands, Kepulauan Seribu, Dki Jakarta Province

Nurdin¹,

Gustiantini²

2016

BoMG

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“…The results of the present study indicate damage to coral reefs at all the observation stations, with the damage being most severe at stations 2 and 3. The causes of such damage are usually coral bleaching, environmental pressure, and human activities (Toruan & Soedharma, 2013). Coral bleaching occurs due to the loss of part of a population of the symbiont algae Symbiodinium and the resulting white discoloration.…”

Section: Biodiversity Habitatmentioning

confidence: 99%

Habitat Biodiversity as a Determinant of Fish Community Structure on Coral Reefs in Halang Melingkau Island, Kotabaru, South Kalimantan - Indonesia

Tony¹,

Soemarno²,

Wiadnya³

et al. 2021

Egypt. J. of Aquatic Biolo. and Fish.

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The ecosystem of coral reefs is a fundamental process for marine resources playing an important role in supporting the lives of various aquatic organisms, with coral reef fish being one of the main dependent sea animals. The current study was purposely undertaken to assess coral reef fish biodiversity and its association with coral coverage on Halang Melingkau Island, Kotabaru, South Kalimantan, Indonesia. This research was conducted in April 2019 on Halang Melingkau Island, Kotabaru, South Kalimantan, Indonesia. The research was carried out at 6 stations with 18 observation points that were considered to be representative of the conditions of coral reefs and coral reef fish in the waters of the island. The field observation method was applied by laying down 50-meter line transects (line intercept transects) and using visual census (underwater visual census) to obtain data concerning fish and coral populations. The findings indicated that the average coral reef coverage in Halang Melingkau Island was moderate (33.77%) , and it was remarkable that station 6 had the best coral reef coverage (53.71%). Additionally, station 6 possessed the highest fish population as well as the highest number of fish species. Findings of the present study predict that correlation analysis indicated a strong positive correlation between coral coverage and the abundance of coral reef fish. In this essence, when the coral coverage increases, the coral reef fish abundance would also increase. Simultaneously, a decrease in the coral reef coverage in a specific location could result in the decrease in the abundance of coral reef fish

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The Composition and Distribution of Benthic Foraminifera at Coral Reef Ecosystem in Thousands Island

Abstract: ABSTRACT

Cited by 2 publications

References 11 publications

Analyses of Foraminifers Microfauna as Environmental Bioindicators in Kotok Besar, Kotok Kecil and Karang Bongkok Islands, Kepulauan Seribu, Dki Jakarta Province

Analyses of Foraminifers Microfauna as Environmental Bioindicators in Kotok Besar, Kotok Kecil and Karang Bongkok Islands, Kepulauan Seribu, Dki Jakarta Province

Habitat Biodiversity as a Determinant of Fish Community Structure on Coral Reefs in Halang Melingkau Island, Kotabaru, South Kalimantan - Indonesia

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