scholarly journals The Impact of Coral Conditions on the Structure of the Megabenthos Community Associated with the Coral Reefs of the Spermonde Islands

2020 ◽  
pp. 37-50
Author(s):  
K.P. Beatrix Tatipata ◽  
Supriadi Mashoreng
Keyword(s):  
Coral Reefs ◽  
Diversity Index ◽  
Coral Cover ◽  
Live Coral ◽  
Sea Waves ◽  
Species Diversity Index ◽  
Coral Reef Ecosystems ◽  
Check Method ◽  
The Impact ◽  
Line Intercept

Coral reefs are organisms that live on the bottom of the waters and are in the form of limestone (CaCO3) which is strong against sea waves so that it can prevent coastal erosion and is also a place for various types of animals associated with coral reef ecosystems that utilize coral polyps. as his food. Mega-benthos are biota / organisms with a size of more than 1 cm that live on or in the seabed, including the sticking, creeping and burrowing biota that is visible with the camera. The research was conducted using the Line Intercept Transect Method and the Benthos Reef Check Method. The results showed that the highest percentage of live coral cover was found on Badi Island 71.46% (Good coral condition category), the moderate coral condition category was represented by Kapoposang Island (46.02%) and the bad coral condition category was represented by Ballanglompo Island ( 7.92%). The highest diversity of species (H ') Mega-benthos is at station 3 (Badi Island) with the value of H' = 2.528 while the lowest is at station IV (Lumu-lumu Island) with the value of H '= 0.6365. So that the category of the megabenthos species diversity index in the research location can be said to be in the low to moderate category.

scholarly journals Dampak Snorkeling Terhadap Persen Tutupan Terumbu Karang Di Pulau Gili Labak Sumenep Madura

2021 ◽  
Vol 10 (2) ◽  
pp. 151-161
Author(s):  
Insafitri Insafitri ◽  
Eka Nurahemma Ning Asih ◽  
Wahyu Andy Nugraha
Keyword(s):  
Coral Reef ◽  
Coral Reefs ◽  
Coral Species ◽  
Coral Cover ◽  
Observation Time ◽  
Live Coral ◽  
Marine Tourism ◽  
Coral Reef Ecosystems ◽  
Potential Impact ◽  
The Impact

Wisata snorkeling terumbu karang di perairan pulau Gili Labak merupakan salah satu sektor wisata bahari yang sedang dikembangkan oleh pemerintah kebupaten Sumenep Madura sejak tahun 2014 hingga saat ini. Peningkatan jumlah wisatawan yang terjadi pada beberapa tahun terakhir dapat menimbulkan resiko tekanan dan kerusakan ekosistem terumbu karang di area snorkeling secara berkala. Penelitian ini bertujuan untuk mengetahui dampak kegiatan wisatawan sebelum, selama dan sesudah snorkeling terhadap ekosistem terumbu karang yang dikaji dengan mengetahui jenis karang yang mendominasi, status persentase tutupan terumbu karang serta potensi Dampak Wisata Bahari (DWB) snorkeling di lokasi wisata snorkeling pulau Gili Labak Sumenep. Persentase penutupan lifeform karang pulau Gili Labak khususnya di area snorkelling didominasi oleh karang hidup sebanyak 74% dan unsur abiotik sebesar 22%. Jenis karang yang mendominasi pulau Gili Labak adalah Acropora Branching sebesar 19,88% dan Coral Foliose sebesar 10,25%. Selama waktu 6 minggu pengamatan terjadi penurunan total karang sebesar 0,64% yang termasuk kategori rusak ringan, dimana sebagian besar kerusakan terjadi pada karang dengan bentuk pertumbahan branching misalnya Acropora Submassive dan Coral Submassive. Penurunan persen tutupan karang yang tinggi terjadi setelah kegiatan snorkeling (after) yang dilakukan oleh wisatawan. Analisa potensi Dampak Wisata Bahari (DWB) snorkeling pada terumbu karang di perairan Gili Labak selama 6 minggu pengamatan masuk dalam kategori rendah yaitu berkisar 0,052% hingga 0,085%. Faktor penyebab kecilnya nilai presentase Dampak Wisata Bahari (DWB) ini diduga karena waktu pengamatan cenderung pendek dan jenis karang yang mendominasi yaitu Acropora. Acropora memiliki kemampuan regenerasi lebih cepat dibandingkan jenis lainnya.  The snorkeling activity around coral reefs in the waters of Gili Labak is one of the marine tourism sectors that is being developed by the Sumenep Madura district government since 2014. Increasing number of tourists that occurs in recent years pose a risk of pressure and damage to coral reef ecosystems in the snorkeling area. This study aims to determine the impact of tourist activities before, during and after snorkeling on coral reef ecosystems that are studied by knowing the type of dominated coral, the percentage status of coral cover and the potential Impact of snorkeling at the snorkeling sites of the island of Gili Labak Sumenep. The percentage of coral cover in the island of Gili Labak especially in the snorkelling area is dominated by live coral ( 74%) and abiotic elements by 22%. Coral species that dominate the island of Gili Labak are Acropora Branching at 19.88% and Coral Foliose at 10.25%. During the 6-week observation there was a decrease in live coral cover by 0.64% which was categorized as minor damage, most of the damage occurred to branching   Acropora, sub-massive Acropora and Coral Sub-massive. The high percent decrease in coral cover occurred after snorkeling conducted by tourists. Analysis of the potential impact of snorkeling on coral reefs in the waters of Gili Labak for 6 weeks of observation is in the low category, ranging from 0.052% to 0.085%. The factor causing the small impact of Marine Tourism is presumably because the observation time tends to be short and the dominant coral species is Acropora. Acropora has the ability to regenerate faster than other types.

scholarly journals Studi Ekosistem Terumbu Karang di Taman Nasional Kepulauan Seribu

2019 ◽  
Vol 9 (2) ◽  
pp. 352-365
Author(s):  
Linda Noviana
Keyword(s):  
Coral Reef ◽  
Coral Reefs ◽  
Coral Cover ◽  
Ecological Condition ◽  
Capital City ◽  
Live Coral ◽  
Life And Death ◽  
Natural Beauty ◽  
Coral Reef Ecosystems ◽  
Line Intercept

Taman Nasional Laut Kepulauan Seribu (TNLKpS) has a unique natural resource is the natural beauty of the sea and coral ecosystems are unique. But along with the rapid population growth of Jakarta as the capital city and the increasing number of tourists also affect the condition of coral reefs in TNLKpS. This study aimed to analyze and assess the ecological condition of coral reef ecosystems in the utilization zone travel TNLKpS by coral cover life and death, diversity as well as the factors causing the damage of the survey line intercept transect (LIT), literature review, interviews and analysis of the condition of coral reefs by Decree LH No. 4 of 2001 on Baku Criteria Damage Coral Karan. Condition of the reef by live coral cover otherwise damaged to moderate, based on the otherwise dead coral cover damaged high to moderate damage, then the number and type of reef fish more on the depth of 10 meters in comparison with 3 meters. Thecondition of coral reef ecosystems is common in 3 islands (Pulau Putri, Pulau Macan and Pulau Angin Angin Genteng) in TNKS is still quite good, but in some snorkeling spots it looks bad (3 stations) and medium (2 stations) when compared to spots diving (only 1 bad station).

scholarly journals Coral Reef Conditions of Hogow and Dakokayu Islands Southeast Minahasa Regency

2019 ◽  
Vol 7 (1) ◽  
pp. 186
Author(s):  
Billy N. Ompi ◽  
Unstain N.W.J. Rembet ◽  
Ari B. Rondonuwu
Keyword(s):  
Water Quality ◽  
Coral Reef ◽  
Coral Reefs ◽  
Coral Cover ◽  
Quality Parameters ◽  
Line Transect ◽  
Live Coral ◽  
Live Coral Cover ◽  
Coral Reef Ecosystems ◽  
Line Intercept

This research objective was to determine the condition of Coral Reef ecosystems in Dakokayu and Hogow Islands, Southeast Minahasa Regency. The method that has been used in this studies that is Line Intercept Transect (LIT) by diving activities at 5 meter and 10 meters depth with 50 meters transect length. Each biota passed by the line transect recorded according based on shape of growth.Coral Reefs conditon in Hogow Island in 5 meters and 10 meters depth were categorized as a “Good” where the percentage of live coral cover in 5 meters depth is 70.12% and in 10 meters depth  is 55.78%. The condition of Coral Reefs on Dokokayu Island at a depth of 5 meters is categorized “Good” with the percentage of live coral cover is 56.32% while in the 10 meters depth it is categorized as “Medium” with the percentage of live coral cover is 48.10%. Water quality parameters such as temperature, salinity, brightness, pH, and dissolved oxygen (DO) are within the range of tolerance for Coral Reefs to survive.Keywords: Condition, Coral Reef, Hogow, DokokayuABSTRAKTujuan penelitian untuk mengetahui kondisi ekosistem terumbu karang di Pulau Dakokayu dan Pulau Hogow, Kabupaten Minahasa Tenggara.  Metode yang telah digunakan dalam penelitian ini yaitu Line Intercept Transek (LIT) dengan melakukan penyelaman pada kedalaman 5 dan 10 meter dengan panjang transek 50 meter.  Setiap biota yang dilewati transek akan dicatat menurut bentuk pertumbuhannya. Secara umum, kondisi terumbu karang di Pulau Hogow pada kedalaman 5 meter dan 10 meter, dikategorikan Baik dimana persentasi tutupan karang hidup pada kedalaman 5 meter sebesar 70,12% dan pada kedalaman 10 meter sebesar 55,78%.  Kondisi terumbu karang di Pulau Dokokayu pada kedalaman 5 meter dikategorikan Baik  dengan persentase tutupan karang hidup 56,32% sedangkan di kedalaman 10 meter dikategorikan  Sedang  dengan persentase tutupan karang hidup 48,10 %. Parameter kualitas perairan seperti suhu, salinitas, kecerahan, pH, dan oksigen terlarut (DO) berada dalam kisaran toleransi bagi terumbu karang untuk dapat bertahan hidup.Kata Kunci : Kondisi, Terumbu Karang, Hogow, Dokokayu

scholarly journals Dampak Kegiatan Pariwisata terhadap Status Tutupan Terumbu Karang dan Valuasi Ekonomi di Kepulauan Karimunjawa The Impact of Tourism Activities on The Status of Coral Reef Cover and Economic Valuation in Karimunjawa Island

2020 ◽  
Vol 9 (1) ◽  
pp. 72-80
Author(s):  
Ary Hendri Pribadi ◽  
Suryanti Suryanti ◽  
Churun Ain
Keyword(s):  
Coral Reef ◽  
Coral Reefs ◽  
Coral Cover ◽  
Economic Valuation ◽  
Economic Value ◽  
Travel Cost ◽  
Travel Cost Method ◽  
The Status ◽  
The Impact ◽  
Line Intercept

ABSTRAK Pulau Karimunjawa adalah salah satu objek destinasi wisata keindahan ekosistem terumbu karang. Kunjungan wisatawan di Karimunjawa dapat berdampak pada terumbu karang dan nilai ekonomi pariwisata. Penelitian ini dilaksanakan pada April-Mei 2019 di Kepulauan Karimunjawa, Kabupaten Jepara. Tujuan dari penelitian ini untuk mengetahui dampak pariwisata terhadap nilai status tutupan terumbu karang dengan menggunakan metode Line Intercept Transect (LIT) di Pulau Tanjung Gelam, Pulau Menjangan Besar dan Pulau Cemara Kecil serta nilai valuasi ekonomi pariwisata dengan menggunakan metode biaya perjalanan atau Travel Cost Method (TCM). Hasil yang didapatkan dari penelitian ini yaitu jumlah kunjungan wisatawan yang datang ke Pulau Karimunjawa meningkat sejak tahun 2016 hingga tahun 2018. Kondisi status tutupan terumbu karang yang diperoleh dalam kondisi baik dengan nilai karang hidup yang didapatkan pada Pulau Tanjung Gelam 61,6%, Pulau Menjangan Besar 70,8% dan Pulau Cemara Kecil 57,3%. Luasan terumbu karang pada tahun 2016 hingga tahun 2018 di Pulau Mejangan Besar dan Cemara Kecil mengalami penurunan. Sedangkan nilai valuasi ekonomi tahun 2016 sejumlah Rp.125.426.860,- 2017 dan 2018 sejumlah Rp.135.437.480,- dan Rp.156.932.039,-. Dampak wisatawan yang berkunjung tahun 2016-2018 pada valuasi ekonominya tiap tahunnya mengalami peningkatan. Hasil nilai valuasi ekonomi yang didapatkan pada penelitian ini,nilai rata-rata TCM pada wilayah Kabupaten Jepara Rp.1.111.023,- dan nilai ekonomi pertahunnya Rp.3.369.031.988,-. Rata-rata biaya perjalanan luar wilayah Kabupaten Jepara Rp.1.146.314,- dan nilai biaya pertahunnya Rp.12.324.171.938,-. Nilai total valuasi ekonomi dari dalam wilayah Kabupaten Jepara dan luar wilayah Kabupaten Jepara yaitu Rp.156.693.203.925,-. ABSTRACT Karimunjawa Island is one of the tourist destinations of the beauty of the coral reef ecosystem. Tourist visits in Karimunjawa can have an impact on coral reefs and the economic value of tourism. This research was conducted in April-May 2019 in the Karimunjawa Islands, Jepara Regency. The purpose of this study was to determine the impact of tourism on the status of coral cover status using the Line Intercept Transect (LIT) method on Tanjung Gelam Island, Menjangan Besar Island and Cemara Kecil Island and the economic valuation value of tourism using the travel cost method or the Travel Cost Method ( TCM). The results obtained from this study are the number of tourist arrivals to Karimunjawa Island increased from 2016 to 2018. The status of coral cover status obtained in good condition with the value of live coral obtained on Pulau Tanjung Gelam 61.6%; Pulau Menjangan Besar 70.8% and Pulau Cemara Kecil 57.3%. The extent of coral reefs in 2016 to 2018 on Pulau Mejangan Besar and Pulau Cemara Kecil declined. While the value of economic valuations in 2016 amounted to Idr.125,426,860,- 2017 and 2018 amounted to Idr.135,437,480,- and Idr.156,932,039,-. The impact of tourists visiting 2016-2018 on their economic valuations has increased each year. The results of the economic valuation obtained in this study, the average value of TCM in the Jepara Regency region is Idr.1,111,023, and the annual economic value is Idr.3,369,031,988. The average cost of trips outside the area of Jepara Regency is Idr.1,146,314, and the annual cost is Idr.12,321,171,938. The total value of economic valuations from within the Jepara Regency and outside the Jepara Regency is Idr.156,693,203,925. 

scholarly journals Condition of coral reef in Batee Island waters, Peukan Bada Sub-District, Aceh Besar

DEPIK ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 115-119
Author(s):  
Maria Ulfah ◽  
Saiful Mahlil ◽  
Muhammad Nasir ◽  
Sayyid Afdhal El Rahimi ◽  
Syahrul Purnawan ◽  
...  
Keyword(s):  
Coral Reef ◽  
Coral Cover ◽  
Marine Biota ◽  
Live Coral ◽  
Small Islands ◽  
Live Coral Cover ◽  
Coral Reef Ecosystems ◽  
The Indian Ocean ◽  
Average Condition ◽  
Line Intercept

Batee Island is one of the small islands in the Aceh Besar region and is uninhabited and directly faces the Indian Ocean. Batee Island's waters have the potential for marine biota, especially coral reef ecosystems, and other associated biotas. This study aims to determine the percentage and comparison of live coral cover in Batee Island waters and determine the genus' composition in Batee Island waters. This research was conducted in October-November 2016. Collecting coral reef data using the LIT (Line Intercept Transect) method. The results showed that the live coral cover in Batee Island's waters differed between the East and West Batee Islands. The coral reefs' average condition in Batee Island waters at shallow depths (0-5m) is 41.41%, and deep (6-10m) is 36.52%. Overall, the conditions and live coral cover in the waters of Batee Island are classified as moderate. In the waters of Batee Island, there are 31 coral genera. The highest percentage of corals was the genus Acropora (50.02%).Keywords:Batee IslandConditionCoral reefCoral cover

scholarly journals Kondisi Terkini Presentase Tutupan Terumbu Pada Masa Pandemi Covid-19 di Gili Air, Taman Wisata Perairan Gili Matra, Nusa Tenggara Barat

2021 ◽  
Vol 7 (2) ◽  
pp. 238-247
Author(s):  
Nurliah Buhari ◽  
Mahardika Rizqi Himawan ◽  
Edwin Jefri ◽  
Paryono Paryono ◽  
Ibadur Rahman ◽  
...  
Keyword(s):  
Coral Reef ◽  
Coral Reefs ◽  
Coral Cover ◽  
Secondary Data ◽  
Live Coral ◽  
Conservation Areas ◽  
Core Zone ◽  
Biological Targets ◽  
The Core ◽  
Coral Reef Ecosystems

Gili Matra Aquatic Tourism Park has two conservation targets, namely biological targets and social, cultural and economic targets. Coral reef ecosystems, apart from being a conservation target, are also an attraction for tourists to visit. This research was conducted to determine the condition of the coral reef ecosystem to be used as the basis for the management of conservation areas. The research was conducted by collecting coral reef data either through surveys or secondary data from the results of previous studies. Coral reef survey using the standard Line Intercept Transect method. The survey results show that the condition of coral reefs in the utilization zone is better than the core zone. Live coral cover in the utilization zone reached 71% so it was categorized as good, while in the core zone it only reached 8% so it was categorized as bad. Coral reefs in the core zone are unable to recover even though the number of tourists has decreased during the Covid-19 pandemic. Therefore, the location of the core zone on Gili Air needs to be evaluated further so that the effectiveness of Gili Matra TWP management can be improved.  Key words: coral reefs; Gili Matra; Conservation

scholarly journals KELIMPAHAN IKAN CHAETODONTIDAEDAN POMACENTRIDAE PADA EKOSISTEM TERUMBU KARANG DI PERAIRAN BEDUKANG KABUPATEN BANGKA

2018 ◽  
Vol 12 (2) ◽  
pp. 76-83
Author(s):  
Fatimah Fatimah ◽  
Kurniawan Kurniawan ◽  
Indra Ambalika Syari
Keyword(s):  
Coral Reefs ◽  
Coral Cover ◽  
Good Condition ◽  
Principal Component ◽  
Environmental Services ◽  
Live Coral ◽  
Belt Transect ◽  
Relationship Of ◽  
Line Intercept ◽  
Amphiprion Clarkii

Bedukang waters areas have high natural resources and environmental services, including coral reefs ecosystem. The aim of this study to analyze the abundance of Chaetodontidae and Pomacentridae.Percentage of live coral cover, and relationship of Chaetodontidae and Pomacentridae with habitat conditions. This research was conducted in March 2018. Belt Transect method used to collect fishes data and Line Intercept Transect to coral reefs. Data analysis uses Principal Component Analysis (PCA) and Correspondent Analysis (CA). The results showed 14 fishes species, 2 species of fishes family Chaetdontidae, and 12 species of fishesPomacentridae 2.267 ind/ha. The highest species composition is Neoglyphidodon nigroris and the lowest Amphiprion clarkii. The abundance of Chaetodontidae and Pomacentridae 14 species. The highest abundance at station 4 was 4,860 ind/ha and the lowest at station 1 was 820 ind/ha. The percentage of coral reef cover is in poor, medium and good condition with an average of 39.66%. The abundance of Chaetodontidae and Pomacentridae fish in Bedukang waters is influence by the percentage of live coral and algae cover. Chaetodontidae and Pomacentridae in Bedukang waters favor Acropora, Euphylia, Favites, Fungia, Galaxia, Goniopora, Lobophyllia, Pavona, Porites, Psammocora,Turbinaria, Cypastrea, Montipora, Platygyra andSymphylliagenus

scholarly journals Diversity of Coral Genus Scleractinia in Tidung Island Waters, Seribu Islands, DKI Jakarta Province

2021 ◽  
Vol 9 (2) ◽  
pp. 157
Author(s):  
Jouvan Randy Ekel ◽  
Indri Shelovita Manembu ◽  
Hermanto Wem Kling Manengkey ◽  
Kakaskasen Andreas Roeroe ◽  
Medy Ompi ◽  
...  
Keyword(s):  
Coral Reefs ◽  
Diversity Index ◽  
Coral Growth ◽  
Limiting Factors ◽  
Anthropogenic Pressures ◽  
Conservation Area ◽  
Coral Genus ◽  
Rock Mining ◽  
The Impact ◽  
Line Intercept

Coral reefs are one of the most productive and diverse ecosystems on earth and provide ecosystem services. One of the islands of the Seribu Islands that has a coral reef ecosystem is Tidung Island. It is strategic and developing location makes this island used as a residential area, conservation area, and tourist destination. But the utilization has an impact on the damage of coral reefs through environmental and anthropogenic pressures. This study aims to determine coral diversity by identifying the coral genus Scleractinia and the factors that affect coral diversity. Observations were done on three different stations include 2 snorkeling areas and 1 natural area. The method used is LIT (Line Intercept Transect) and coral genus identification with Coral Finder Toolkit Indo Pacific 3.0. The results of identification obtained 16 coral genera namely genus Acropora, Montipora, Isopora, Favites, Leptastrea, Favia, Goniastrea, Montastrea, Platygyra, Echinopora, Porites, Pocillopora, Stylophora, Ctenactis, Pavona, dan Symphyllia, with the value of Diversity Index (H') in the waters of Tidung Island ranges from 0.94 – 2.34  in the category of low to moderate diversity. The parameters of water quality in Tidung Island, temperature, salinity, and acidity (pH) are relatively good for coral growth, but brightness is still relatively poor for coral growth. The impact of human activities such as snorkeling, ship anchors, fishing with destroyers, oil and waste pollution, and rock mining are factors that affect coral growth and diversity.Keywords: Coral Scleractinia; Limiting Factors; Coral Finder; Tidung IslandAbstrakTerumbu karang adalah salah satu ekosistem yang paling produktif dan beragam di bumi serta menyediakan jasa ekosistem. Salah satu pulau dari gugusan Kepulauan Seribu yang memiliki ekosistem terumbu karang yaitu Pulau Tidung. Letaknya yang strategis dan berkembang menjadikan pulau ini dimanfaatkan sebagai kawasan permukiman, daerah konservasi, dan kawasan tujuan wisata. Namun dari pemanfaatan tersebut memberikan dampak terhadap kerusakan pada terumbu karang melalui tekanan-tekanan lingkungan maupun antropogenik. Penelitian ini bertujuan untuk mengetahui keanekaragaman karang dengan mengidentifikasi genus karang Scleractinia dan faktor yang mempengaruhi keanekaragaman karang. Pengamatan di tiga stasiun berbeda yaitu di antaranya 2 kawasan wisata snorkeling, dan 1 kawasan yang masih alami. Metode yang digunakan yaitu LIT (Line Intercept Transect) dan identifikasi genus karang dengan Coral Finder Toolkit Indo Pasific 3.0. Hasil identifikasi didapatkan 16 genus karang yaitu genus Acropora, Montipora, Isopora, Favites, Leptastrea, Favia, Goniastrea, Montastrea, Platygyra, Echinopora, Porites, Pocillopora, Stylophora, Ctenactis, Pavona, dan Symphyllia, dengan nilai Indeks Keanekaragaman (H’) di perairan Pulau Tidung berkisar 0,94 – 2,34 berada pada kategori keanekaragaman rendah hingga sedang. Parameter kualitas perairan di Pulau Tidung, suhu, salinitas, dan derajat keasaman (pH) tergolong baik bagi pertumbuhan karang, namun kecerahan masih tergolong kurang baik bagi pertumbuhan karang. Dampak aktivitas manusia seperti snorkeling, jangkar kapal, penangkapan ikan dengan alat perusak, pencemaran minyak dan sampah, serta penambangan batu karang menjadi faktor yang mempengaruhi pertumbuhan dan keanekaragaman karang.

scholarly journals Profil Terumbu Karang Pulau Kangean, Kabupaten Sumenep, Indonesia [Coral Reef Profile of Kangean Island, Sumenep District, Indonesia]

2018 ◽  
Vol 10 (2) ◽  
pp. 76
Author(s):  
Apri Arisandi ◽  
Badrud Tamam ◽  
Achmad Fauzan
Keyword(s):  
Coral Reef ◽  
Reef Fish ◽  
Coral Cover ◽  
Marine Ecosystem ◽  
Marine Biota ◽  
Live Coral ◽  
Visual Census ◽  
Coral Reef Ecosystems ◽  
Marine Ecotourism ◽  
Line Intercept

Abstrak Ekosistem terumbu karang merupakan bagian dari ekosistem laut yang penting, karena menjadi sumber kehidupan bagi biota laut.  Penelitian ini bertujuan untuk mengumpulkan data berupa persentase penutupan karang hidup, lifeform dan jumlah karang.  Kelimpahan ikan karang dan kondisi perairan kepulauan yang terdapat ekosistem terumbu karang bisa menjadi dasar untuk mendukung kesesuaian suatu kawasan menjadi objek ekowisata bahari.  Penelitian dilaksanakan pada bulan juli-Agustus dan dilakukan menggunakan metode Line Intercept Transect (LIT), sepanjang 50 meter sejajar garis pantai pada kedalaman 3 dan 10 meter. Persentase penutupan karang mengacu kepada lifeform dan data ikan karang diambil menggunakan metode pencacahan langsung (visual census).  Hasil penelitian menunjukkan bahwa persentase tutupan karang berada pada kisaran 60-73% yang artinya kondisi ekosistem terumbu karang di Pulau Kangean adalah baik, dan merupakan habitat yang nyaman bagi ikan-ikan karang seperti spesies Apogon sp., Chelmon sp., Chaetodon sp., Lethrinus sp., dan Cheilodipterus sp. AbstractCoral reef ecosystems are part of an important marine ecosystem because they are a source of life for marine biota. This study was aimed to collect data in the form of a percentage of live coral cover, lifeform and number of corals. The abundance of reef fish and the condition of island waters that have coral reef ecosystems can be the basis for supporting the suitability of an area to become an object of marine ecotourism. The study was conducted in July-August and was carried out using the Line Intercept Transect (LIT) method, along 50 meters parallel to the coastline at depths of 3 and 10 meters. The percentage of coral cover refers to the lifeform and data on reef fish are taken using the visual census method. The results showed that the percentage of coral cover was in the range of 60-73%, which means that the condition of the coral reef ecosystem in Kangean Island is good, and is a comfortable habitat for reef fish such as the species Apogon sp., Chelmon sp., Chaetodon sp., Lethrinus sp., and Cheilodipterus sp.

scholarly journals The Status of the Coral Reefs of the Jaffna Peninsula (Northern Sri Lanka), with 36 Coral Species New to Sri Lanka Confirmed by DNA Bar-Coding

Oceans ◽  
2021 ◽  
Vol 2 (3) ◽  
pp. 509-529
Author(s):  
Ashani Arulananthan ◽  
Venura Herath ◽  
Sivashanthini Kuganathan ◽  
Anura Upasanta ◽  
Akila Harishchandra
Keyword(s):  
Sri Lanka ◽  
Coral Reefs ◽  
Coral Species ◽  
Diversity Index ◽  
Coral Cover ◽  
Northern Region ◽  
Live Coral ◽  
Northern Coast ◽  
Acropora Digitifera ◽  
The Status

Sri Lanka, an island nation located off the southeast coast of the Indian sub-continent, has an unappreciated diversity of corals and other reef organisms. In particular, knowledge of the status of coral reefs in its northern region has been limited due to 30 years of civil war. From March 2017 to August 2018, we carried out baseline surveys at selected sites on the northern coastline of the Jaffna Peninsula and around the four largest islands in Palk Bay. The mean percentage cover of live coral was 49 ± 7.25% along the northern coast and 27 ± 5.3% on the islands. Bleaching events and intense fishing activities have most likely resulted in the occurrence of dead corals at most sites (coral mortality index > 0.33). However, all sites were characterised by high values of diversity (H’ ≥ 2.3) and evenness (E ≥ 0.8). The diversity index increased significantly with increasing coral cover on the northern coast but showed the opposite trend on the island sites. One hundred and thirteen species of scleractinian corals, representing 16 families and 39 genera, were recorded, as well as seven soft coral genera. Thirty-six of the scleractinian coral species were identified for the first time on the island of Sri Lanka. DNA barcoding using the mitochondrial cytochrome oxidase subunit I gene (COI) was employed to secure genetic confirmation of a few difficult-to-distinguish new records: Acropora aspera, Acropora digitifera, Acropora gemmifera, Montipora flabellata, and Echinopora gemmacea.

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