INVENTARIZATION OF CORAL REEFS IN THE WATERS OF RAKATA ISLAND, KRAKATAU ISLANDS

Abstrak Indonesia is an ideal place for coral growth because of the tropical climate. Rakata Island is included in the Krakatau Islands Nature Reserve and Marine Reserve area which is influenced by the volcanic activity of son of Krakatau Archipelago and human activities. Both of these activities will affect the growth of coral reefs. The purpose of this study was to determine the current condition of coral reefs and the diversity of living coral forms on Rakata Island. Collecting data for analysis of coral reef cover using the Line Intercept Transect (LIT) method was parallel to the coastline of Rakata Island at two points. The percentage of live coral cover from points I and II at a depth of 5 meters was 50.69% and 33.80% classified as in good and moderate conditions respectively. While the percentage of live coral cover at a depth of 10 meters at points I and II were 41.90 % and 16.01% whice were in moderate and poor conditions. The coral reefs mostly found in point I were leaf corals (CF) namely Turbinaria reniformis and Turbinaria frondens, while in point II were massive corals (CM) were found i.e. Goniastrea edwardsi, Favia pallida, Montastrea valenciennesi, Favites abdita, Astreopora listeria, and Favites complanata.

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Coral Reef Conditions of Hogow and Dakokayu Islands Southeast Minahasa Regency

JURNAL ILMIAH PLATAX ◽

10.35800/jip.7.1.2019.22743 ◽

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

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Status of Coral Reefs in the Water of Spermonde, Makassar, South Sulawesi

E3S Web of Conferences ◽

10.1051/e3sconf/202132403007 ◽

2021 ◽

Vol 324 ◽

pp. 03007

Author(s):

Ni Wayan Purnama Sari ◽

Rikoh Manogar Siringoringo ◽

Muhammad Abrar ◽

Risandi Dwirama Putra ◽

Raden Sutiadi ◽

...

Keyword(s):

Coral Reef ◽

Coral Reefs ◽

Coral Cover ◽

Public Awareness ◽

Live Coral ◽

Health Index ◽

Point Count ◽

Live Coral Cover ◽

Reef Health ◽

Index Value

Observations of the condition of coral reefs have been carried out in Spermonde waters from 2015 to 2018. The method used in this observation uses Underwater Photo Transect (UPT), and the data obtained is analyzed using CPCe (Coral Point Count with Excel Extensions) software. The results show that the percentage of coral cover has increased from year to year. The percentage of live coral cover in 2015 was 19.64%, 23.60 in 2016, 23.72% in 2017, and 27.83% in 2018. The increase in live coral cover from year to year is thought to occur due to the availability of nutrients. or increasing public awareness, considering this location is one of the most famous tourist attractions in Makassar. Coral reef health index values can be used to classify coral reef health. Through the analysis of the coral reef health index, an index value of 4 was obtained, which means that the condition of the coral reefs is in the “moderate” category.

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Keanekaragaman dan Biomassa Ikan Karang serta Keterkaitannya dengan Tutupan Karang Hidup di Perairan Manggis, Kabupaten Karangasem, Bali

Journal of Marine and Aquatic Sciences ◽

10.24843/jmas.2019.v05.i02.p02 ◽

2018 ◽

Vol 5 (2) ◽

pp. 164

Author(s):

I Made Raditya Putra ◽

I Gusti Ngurah Putra Dirgayusa ◽

Elok Faiqoh

Keyword(s):

Coral Reef ◽

Reef Fish ◽

Coral Reef Fish ◽

Coral Cover ◽

Total Biomass ◽

Live Coral ◽

Strong Positive Correlation ◽

Living Coral ◽

Positive Correlation ◽

Live Coral Cover

The existence of coral reef fish is closely related to the availability of coral reef resource as a habitat. Coral reef fish is a biota that has a fascination with a variety of color patterns and fascinating. Differences in coral cover conditions will affect the abundance of coral reef fish, especially those with strong linkages to living corals. This research was conducted in June - August 2017 by using line intercept transect (LIT) method for coral cover percentage and visual census method for biodiversity and biomass of coral reef fish with 3 research stations in Manggis waters, Karangasem. From the research results, it shows that the diversity index ranged between 2.54 - 2.70 which means the diversity of coral reef fish in the medium category and the stability of the community is in the medium. Furthermore, total biomass of coral reef fish ranged between 186,17 - 1692,08 kg / ha. The results stated that the percentage of live coral cover in Manggis waters ranged from 3.83% to 12.44% which means that live coral cover is categorized as bad. A very strong positive correlation between living coral conditions and coral reef fish biomass was 92.42%. Meanwhile, the relationship between living coral conditions and the diversity of coral reef fish had a strong positive correlation of 65.4%. The diversity of coral reef fish in waters is not only caused by live coral cover; however, it is caused by coral reef ecosystems that are associated in the bottom of the waters.

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

DEPIK ◽

10.13170/depik.10.2.19995 ◽

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

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OVERVIEW OF THE SUCCESSFUL CORAL REEF MANAGEMENT IN INDONESIA

Marine Research in Indonesia ◽

10.14203/mri.v35i1.477 ◽

2010 ◽

Vol 35 (1) ◽

pp. 31-41

Author(s):

Suharsono

Keyword(s):

Coral Reef ◽

Coral Reefs ◽

Coral Cover ◽

Action Plan ◽

Good Condition ◽

Monitoring Program ◽

Live Coral ◽

Subsistence Level ◽

Live Coral Cover ◽

The World

Indonesia is the largest archipelagic country in the world, composed of 18,110 islands with a coastline of 108,900 km long, extending some 5000 km long and 2000 km wide located between Asia and Australia. Coral reefs have important meaning and value for the coastal communities in term of economic, social, and cultural conditions. About 1.5 million people are traditional fishermen who live in subsistence level and depend on their lives fully on coral reefs' resources. The Indonesian coral reef contributed 14% of the world, distributed unevenly from Sabang to Merauke with the highest concentration around Sulawesi and Maluku. The species richness and the biodiversity of the Indonesian corals amounted to 590 species belonging to 82 genera or about 80% of the currently existing coral species in the world. Monitoring program has been done from 1993 to 2010 and it shows the trend of improvement in the term of live coral cover. The condition of coral reefs in Indonesia taken from 84 locations and 1048 sites were 50.54% in excellent condition, 26.72% in good condition, 37.21% in fair condition, and 30.82% in bad condition. Improving trends in live coral cover across all project sites shows that the live coral covers has increased in all monitored sites across all project districts with average yearly live coral coverage increase is about 2-5%. The National Policy, Strategy, and Action Plan was established, with its main objective of managing the coral reef ecosystems based on the balance between conservation and utilization, and it was reflected in the Law No. 27 of 2007 concerning coastal management and small islands. The most remarkable result of the program is community awareness, namely the decrease of fishing activities shows that the destructive fishing activities in all project district are now non-existent of at a minimal level. A special text books on marine lives for elementary, secondary, and high school is the most widely adopted by local education service as a book of local content. Whereas institutional strengthening program constitutes the most difficult, energy and time consuming activities. It is due to the rivaly between the local institution and the lac of officials' and the communities' knowledge on the conservation based management principle.

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Studi Ekosistem Terumbu Karang di Taman Nasional Kepulauan Seribu

Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management) ◽

10.29244/jpsl.9.2.352-365 ◽

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).

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Living coral cover and genera diversity of coral Scleractinia in eastern coastal of Minahasa Regency, North Sulawesi

AQUATIC SCIENCE & MANAGEMENT ◽

10.35800/jasm.6.2.2018.24838 ◽

2019 ◽

Vol 6 (2) ◽

pp. 45

Author(s):

Ivone F Pakasi ◽

Lawrence J.L Lumingas ◽

Rene Ch Kepel ◽

Arie B Rondonuwu

Keyword(s):

Coral Reefs ◽

Coastal Waters ◽

Coral Cover ◽

Shannon Index ◽

Eastern Coast ◽

Live Coral ◽

North Sulawesi ◽

M 10 ◽

Live Coral Cover ◽

Line Intercept

Title (Bahasa Indonesia): Tutupan karang hidup dan keanekaragaman genera karang Scleractinia di Pantai Timur Kabupaten Minahasa, Sulawesi Utara The coastal waters east of Minahasa Regency of North Sulawesi Province is one of the areas of water that have the potential to be used as Marine Protected Areas. This study provides information on the condition of coral reefs on the eastern coast of Minahasa Regency, especially in Kamenti and in Toloun. Sampling withSCUBA was conducted using lifeform categories and transects in the form of a 50 m measuring tape with 'Line Intercept Transect' techniqueat thedepthsof 5 m, 10 m and 15 m. The condition of coral reefs in the eastern coastal waters of Minahasa Regency is generally 'good'. The percentage of coral cover in Kamenti was categorized'good', while in the waters Toloun are in a state of 'average'. Genera richness on both sites can be quite high, intotal there are44 genera with 35 genera in Kamenti and 38 genera in Toloun. Kamenti station with the depth of 15 m hasthe highest conservation value because in addition to having the highest number of genera (32 genera), it has also the highest Shannon index (3.35), the highest genera richness index (8.29), the highest genera evenness index (0, 97) and the lowest dominance index (0.12). There is no apparent correlation between the percentage of live coral cover with the number of genera or the Shannon index. But the high percentage of live coral cover is not always identical with the high genera richness; the maximum genera richness is at the intermediatecover level.Perairan pantai sebelah timur Kabupaten Minahasa Provinsi Sulawesi Utara merupakan salah satu kawasan perairan yang berpotensi untuk dijadikan Kawasan Konservasi Perairan. Penelitian ini memberikan informasi tentang kondisi terumbu karang di pantai timur Kabupaten Minahasa khususnya di Kamenti dan di Toloun. Sampling dengan menggunakan SCUBA dilakukan dengan metode kategori lifeformdan menggunakan transek berupa pita meteran sepanjang 50 m dengan teknik ‘Line Intercept Transect‘ pada kedalaman 5 m, 10 m dan 15 m. Kondisi terumbu karang di perairan pantai timur Kabupaten Minahasa umumnya ‘baik’. Persentase tutupan karang batu di Kamenti berada pada kategori ‘baik’ sedangkan di perairan Toloun berada pada kondisi ‘sedang’. Kekayaan genera pada kedua lokasi penelitian dapat dikatakan cukup tinggi yakni secara total terdapat 44 genera dengan masing-masing 35 genera di Kamenti dan 38 genera di Toloun. Stasiun Kamenti kedalaman 15 m adalah yang paling tinggi nilai konservasinya karena selain memiliki jumlah genera terbanyak (32 genera), juga memiliki indeks Shannon tertinggi (3,35), indeks kekayaan genera tertinggi (8,29), indeks kemerataan genera tertinggi (0,97) dan indeks dominasi terendah (0,12). Tidak terdapat hubungan yang nyata antara persentase tutupan karang hidup dengan jumlah genera atau indeks Shannon. Tetapi persentase tutupan karang hidup yang tinggi tidak selalu indentik dengan tingginya kekayaan genera; kekayaan genera maksimun berada pada tingkat tutupan menengah.

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Impact of El Niño 2015-2016 on the coral reefs of the Pacific of Costa Rica: the potential role of marine protection

Revista de Biología Tropical ◽

10.15517/rbt.v68is1.41190 ◽

2020 ◽

Vol 68 (S1) ◽

pp. S271-S282 ◽

Cited By ~ 2

Author(s):

Juan José Alvarado ◽

Celeste Sánchez-Noguera ◽

Gustavo Arias-Godínez ◽

Tatiana Araya ◽

Cindy Fernández-García ◽

...

Keyword(s):

Coral Reef ◽

Coral Reefs ◽

El Niño ◽

El Nino ◽

Coral Cover ◽

Live Coral ◽

El Niño Event ◽

Live Coral Cover ◽

The Pacific ◽

The Impact

Introduction: El Niño 2015-2016 was considered one of the most severe worldwide, causing the third global event of coral bleaching. Previous high-intensity El Niño events (1982-83 and 1997-98) caused high coral mortalities and deterioration of coral reef structures along the Eastern Tropical Pacific, affecting both ecosystem and associated economical activities. Objective: The aim of this study was to determine the impact of the most recent El Niño event on coral reefs from Cocos Island and the Pacific coast of southern Costa Rica. Methods: Coral reefs were surveyed before (2013-2014) and after (2016) the disturbance, using underwater visual censuses within belt transects, to quantify the bottom coverage at different depths. Results: In general, average live coral cover decreased 50% after the 2015-2016 El Niño event, with Golfo Dulce being the most affected area with 75% of live coral cover decline. However, in certain localities such as Isla del Coco and Isla del Caño, the effects of El Niño were apparently minimal, since no substantial loss of live coral cover was detected. Differences in the level of deterioration found between coral reefs could be related to several factors, including the age of the protected area, the distance to centers of human population, and the effectiveness in the application of management strategies. Conclusions: The synergistic impact of the 2015-16 El Niño event and other stressors (e.g. illegal fishing and unregulated coastal human development) increased the levels of disturbance on coral reefs, threatening their structure and functioning. It is necessary to strengthen conservation strategies in order to improve the resilience of coral reefs to the impact of natural and anthropogenic disturbances. Concrete actions such as coral reef restoration, marine environmental education, and marine spatial planning must become important tools to maintain the good health of coral reefs and ensure the sustainability of the goods and services provided by these ecosystems.

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Coral reef condition in several dive points around Bunaken Island, North Sulawesi

AQUATIC SCIENCE & MANAGEMENT ◽

10.35800/jasm.0.0.2014.7306 ◽

2014 ◽

pp. 44

Author(s):

Robert Towoliu

Keyword(s):

Coral Reef ◽

Coral Cover ◽

Integrated Management ◽

Good Condition ◽

Live Coral ◽

Core Zone ◽

Integrated Management System ◽

North Sulawesi ◽

Live Coral Cover ◽

Reef Condition

In order to know the coral reef conditions at several diving points around Bunaken Island, three dive locations (Ron’s point, Lekuan, and Tawara) were chosen as representative locations receiving pressures from snorkeling and SCUBA diving activities, while core zone was representative of location for no diving and fishing activities. Results showed that location with diving activities had live coral cover ranging from 16.89% to 45.78% at 3 and 10m depths, with condition range of bad to moderate, while the location for no diving and fishing activities (core zone) had live coral cover of 55.03% at 3m and 58.15% at 10m, respectively, with good condition category. The present study indicated that the diving activities have affected the coral reef condition, so that a sustainable integrated management system is needed to use the marine ecotourism potency without degrading the coral reef condition in Bunaken Island. Untuk mengetahui kondisi terumbu karang di beberapa lokasi penyelaman di Pulau Bunaken, tiga lokasi penyelaman(Ron’s point, Lekuan, dan Tawara) dipilih mewakili lokasi dengan tekanan aktivitas penyelaman snorkeling maupun SCUBA, sedangkan satu lokasi lainnya yaitu zona inti dipilih mewakili lokasi tanpa aktivitas penyelaman maupun aktivitas penangkapan ikan. Hasil penelitian ini memperlihatkan bahwa lokasi dengan tekanan aktivitas penyelaman memiliki prosentase tutupan karang batu/hidup berkisar antara 16,89% - 45,78% pada kedalaman 3 dan 10m, dengan kategori kondisi terumbu karang buruk sampai cukup, sedangkan pada lokasi yang tidak memiliki aktivitas penyelaman memiliki prosentase tutupan karang batu/hidup sebesar 53,03% pada 3m dan 58,15% pada 10m dengan kategori kondisi terumbu karang adalah baik. Hasil penelitian ini mengindikasikan bahwa aktivitas penyelaman snorkeling maupun SCUBA berdampak pada kondisi terumbu karang di Pulau Bunaken, sehingga sangat diperlukan system pengelolaan yang terpadu dan berkesinambungan dalam memanfaatkan secara maksimal potensi ekowisata bahari tanpa merusak ekosistem terumbu karang di Pulau Bunaken.

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Analysis Condition of Coral Reef Covering in Pramuka Island Waters, Seribu Islands using Line Intercept Transect (LIT) Method

Jurnal Riset Biologi dan Aplikasinya ◽

10.26740/jrba.v2n2.p77-81 ◽

2020 ◽

Vol 2 (2) ◽

pp. 77

Author(s):

Rega Permana ◽

Nora Akbarsyah ◽

Pringgo KDNY Putra ◽

Aulia Andhikawati

Keyword(s):

Coral Reef ◽

Coral Reefs ◽

Coral Cover ◽

Life Forms ◽

Anthropogenic Factors ◽

Coral Reef Ecosystem ◽

Marine Tourism ◽

Tourist Destinations ◽

Line Intercept ◽

Reef Ecosystem

The coral reef ecosystem is one of the typical tropical ecosystems with high biodiversity which has an important role both biologically, ecologically, physically as well as socially and economically. Several coral reef areas in Indonesia were reported to have suffered damage, not only due to climate change which has an impact on rising sea surface temperatures and ocean acidification but also due to anthropogenic factors and irresponsible management of marine tourism. This study aimed to analyze the condition of coral reefs based on covering in Pramuka Island, which is one of the famous tourist destinations in the Seribu Islands. The study was conducted using Line Intercept Transect (LIT) method at predetermined coordinate points. The results showed that the dominant coral reef life form was Acropora Submassive (ACS), namely 18.9%, and Acropora Branching (ACB) as much as 12.48%. Besides, the types of life forms found were coral foliase (9.42%), Miliepora Coral (9.2%), Coral Massive (4.8%), Acropora Encrustring (4.24%), and so on. Based on the results of this study, it can be concluded that the condition of coral reefs in Pramuka Island is still relatively good with a total coral cover percentage of 72.38%. Efforts to protect the coral reef ecosystem in this area need to be considered so that its condition can be maintained.

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