Idris Idris

Indonesian Coral Reef Foundation (Yayasan TERANGI) · Coral Reef Management

Indonesia as an archipelagic country is prone to damage to coral reefs. The grounding of ships on coral reefs has resulted in severe physical and biological damage. The grounding of ships on coral reefs has resulted in severe physical and biological damage, including the uprooting and crashing of coral skeletons, dislodgment and displacement of sed...

Tunda Island is one of the islands at the northern tip of Banten Province, with natural and well-maintained seagrass and mangrove ecosystems. Even though its location is close to an urban area, the use of aquatic resources such as fishing and cultivation is small compared to other islands. However, developing issues such as sand mining plans will u...

Tourism suitability serves as a critical indicator for assessing the feasibility of optimal tourism development within specific coastal environments, considering different tourism categories. This research focuses on Tunda Island, renowned for its picturesque seascapes, diverse biota, and pristine white sand beaches. The primary objective of this s...

The waters of Sabu Raijua are included in World’s Coral Triangle Region, which has high-potential Coral Reefs Ecosystems that have not been widely revealed. The remote location and erratic wave weather conditions give challenges in surveying biodiversity coral reef ecosystems. The observation of the Coral Reef ecosystem has been carried out at 12 s...

Rote Island and its surroundings are included in the Savu Sea Marine National Park (TNP) area and are administratively included in the Rote Ndao Regency, East Nusa Tenggara (NTT) Province. The waters of the area have high potential for coral reef ecosystem resources and are an important for the marine biota. But when the condition is under pressure...

Mules Island and its surroundings are included in the Savu Sea National Park (TNP) area and administratively included in the Manggarai Regency, East Nusa Tenggara Province (NTT). The waters of the area have a high potential for coral reef ecosystem resources and are important support for the marine life. However, the current condition of anthropoge...

The The waters of Raja Ampat have a healthy coral reef ecosystem and a wide variety of species so it has a high abundance of coral reef fish. One of the indicators of fertility level in water is chlorophyll-a and its high and low are influenced by sea surface temperature. The purpose of this study was to determine the relationship between chlorophy...

Raja Ampat Islands have been designated as a Marine Nature Reserve (SAP) since 2014, and community activity in these waters remains high for tourism, fishing and sea transportation activities. All of these activities have the potential to suppress the condition of the coral reefs there. Therefore, it is necessary to evaluate the effectiveness of zo...

The extent of coral reefs, coral biodiversity, and associated biota are known as high mega biodiversity in Indonesian waters, in other words, The Coral Triangle. Threats of coral damage have also been widely reported, including deaths due to natural factors. Coral disease is a natural factor that is not widely known for its existence around Indones...

The mangrove ecosystem is a coastal ecosystem that is important for humans. Mangroves absorb carbon in the atmosphere and store it in biomass or sediment. So, in other words, mangroves play a significant role in mitigating global climate change. This study aimed to examine the structure of the mangrove ecosystem composition and estimate standing ca...

Coral die-offs can be caused by several factors, one of which is the infectious coral disease. Currently, limited data and information are available regarding coral diseases abundance and distribution in Indonesia including Sabu Raijua waters, East Nusa Tenggara. This research aimed to investigate the types and abundance of coral disease and determ...

Coral reefs are distributed widely around Indonesia waters which has various functions as fisheries sources and tourism benefits. Coral reefs are very vulnerable to various threats, such as ship grounding in several areas in Indonesia. The measurement of damage width of coral reefs used the irregular polygon method. In contrast, the impact and the...

Lembeh Strait in North Sulawesi is one of the areas included in the world’s coral triangle. Coral reef structures provide a habitat for reef fish. Herbivorous and invertivorous fish were essential to determine the direction of coral reef succession. This study aims to examine the health of coral reefs based on the presence of reef fish. Observation...

The ship’s ran aground on coral reefs often result in severe physical and biological damage. It is including the removal and crushing of corals reefs (dislodging), the destruction of coral skeletons (pulverization), the erosion and removal of sedimentary calcium carbonate. It is almost cause the loss of three-dimensional complexity. Moreover, this...

Resilience is the ability of a system to reach equilibrium after a temporary disturbance. When an ecosystem is disturbed, then the recovery of the system is very dependent on the diversity of species that are still left. The remaining communities determine the direction of new successional communities formed after the disturbance has passed, includ...

The coral reef is massive deposits of calcium carbonate produced from coral animals that are symbiotic with zooxanthellae. One of the activities carried out as an effort to improve the sustainability of coral reefs is monitoring the health condition of coral reefs. The coral reef health index value is based on benthic components and fish components...

Coral reefs are widely known as essential ecosystems that hold various marine organisms, including various crypto-organisms. Cryptofauna, which live among the interstices of coral reefs, significantly escalates the coral reef biodiversity. The complexity of the reef-building corals' niche could shape the shrimp community structure. This research ai...

Belitung has potential coral reefs as many as 244 species and 89 species of reef fish. However, the current condition of coral reefs in Belitung is under high pressure, caused by illegal tin mining activities. For this reason, need studies related to their impact on the health of marine life, especially on coral reefs so that the policy can be evie...

Indonesia as an archipelagic country has a high biodiversity of coral reefs but is very vulnerable to various threats, one of the causes of damage to coral reefs is by ship aground. The damage causes minor injuries to the degradation of the reef structure. The location of the grounding sometimes on the small islands with calm currents, but sometime...

Abstract - Indonesia has a coral reef area of 25,000 km2 or about 10% of the world's total coral reefs with the highest coral species diversity, namely 569 species from 82 genera and 15 tribes or about 70% more of the world's coral species and 5 types including endemic. Many coastal communities depend on coral reefs for their livelihoods, but curre...

Abstract - Anthropogenic activities and climate change have deteriorated coral reefs around the world. One of the efforts in coral conservation is the improvement of environmental quality through ecosystem rehabilitation. This study aims to determine the growth rate and survival rate of Porites and Montipora corals propagated in artificial reef mod...

Abstract - Coral reef is an ecosystem of coral animals that can create coral or calcium carbonate deposits with the aid of endosymbitic algae. Overall, the family of the reefs in Sangiang Island are divided into 14 family. Coral reefs damage can be caused by natural and human factors. Damage due to natural causes, such as tsunamis. On 22 December 2...

Ship grounding on coral reefs often results in physical and biological damage, including dislodging and removal of corals from reefs, destruction of coral skeletons, erosion and removal of sediment deposits, and loss of three-dimensional complexity. Indonesia, as an archipelagic country, is very vulnerable to various pressures; for example, the cas...

Sangiang Island had been established as a Nature Recreation Park (TWA) in Indonesia, that requires comprehensive data support for good management. The rise of marine tourism that increased in TWA Sangiang Island behoove to be a concern, especially in coral reef ecosystem. The study aimed to determined the condition of the coral cover and the biomas...

The local community in Lembeh Island, North Sulawesi depend on natural resources that is affected by climate change, such as fisheries and agriculture, and therefore their vulnerability to climate change needed to be assessed. A vulnerability and resilience survey was done in three villages in Lembeh Island, which were Kareko, Pintu Kota, and Pasir...

Unconventional tin mining is devouring coastal forest and mangrove in Belitung Island. Thus, carbon emission from deforestation, loss of biodiversity, and increasing vulnerability of coastal communities are inevitable. TERANGI together with ICCTF initiated Belitung Mangrove Park (BMP) to convert inactive tin mining in Seberang Bersatu Community For...

This study explored the use of participatory mapping and several machine learning algorithms (Naïve Bayes, GMO Maxent, SVM, CART, and Random Forest) to map climate induced landslide susceptibility in Lembeh Island, North Sulawesi, based on Earth Observation data available in Google Earth Engine. Participatory mapping on landslide incidents were con...

Maratua Island lies in the Makassar Strait was a destination for marine tourism especially international divers. Currently, no activities in monitoring the effect of tourism is in place, and therefore, there is a need compare the condition of the dive sites and non-dive site as a proxy for the impact of diving to coral reefs. Nine locations in tota...

Pertambangan timah di Bangka Belitung menyisakan kolam-kolam bekas tambang. Hal ini sangat berdampak pada rusaknya ekosistem, hilangnya keanekaragaman hayati, dan berkurangnya vegetasi. Salah satu lokasi terdampak adalah pesisir Desa Juru Seberang, Kabupaten Belitung. Untuk mengurangi dampak kerusakan lingkungan sekaligus mensejahterakan masyarakat...

Pengambilan data tutupan karang dilaksanakan untuk melaksanakan strategi awal kegiatan perbaikan lingkungan. Kondisi terkini kawasan pesisir di Serang khususnya Pulau Sangiang telah terjadi penurunan kualitas perairan karena kegiatan reklamasi, sedimentasi dari pengambilan galian C dan pengerukan bukit untuk kebutuhan lahan industri serta penguruka...

p>The study conducted from 2006 to 2012 with an interval of every two years in the ecoreef area of Manado Tua island found 2,936 individual reef fishes of 181 species that include into 32 families. Species composition value of the 10 dominant species of reef fishes was 55.48% of the total species. The highest number of species was Plotosus lineatus...

p>The study conducted from 2006 to 2012 with an interval of every two years in the ecoreef area of Manado Tua island found 2,936 individual reef fishes of 181 species that include into 32 families. Species composition value of the 10 dominant species of reef fishes was 55.48% of the total species. The highest number of species was Plotosus lineatus...

p>Marine ornamental reef fish trade is a huge industry with trade value USD 200-350 million/ year. Seribu Islands, Jakarta is one of the main ornamental reef fish catch area in Indonesia. The aim of this study was to compare ornamental fishing activities with total allowable catch (TAC). Ornamental reef fish catch data were collected from fishermen...

Marine ornamental fish certification was implemented in Seribu Islands at 2003 – 2006 by MAC on the need of buyers who want a healthy marine ornamental fish and non destructive fishing. This study aimed to evaluate impact of implementation of certification program of marine ornamental fish on coral reef ecosystem and social economic of fishers cond...

Sertifikasi ikan hias diterapkan di Kepulauan Seribu pada 2003-2006 oleh MAC berdasarkan kebutuhan pembeli yang menginginkan ikan hias laut yang sehat dan ditangkap dengan cara yang tidak merusak lingkungan. Studi ini bertujuan untuk mengevaluasi dampak penerapan program sertifikasi perdagangan ikan hias laut terhadap kondisi ekosistem terumbu kara...

Ikan hias laut adalah ikan karang berukuran kecil yang memiliki bentuk dan warna yang menarik. Hal ini memungkinkan semua ikan karang memiliki potensi sebagai ikan hias laut pada saat mereka masih kecil (Martosubroto dkk, 1989). Pemanfaatan ikan karang di Indonesia sebagai ikan hias sudah dimulai sejak 30 tahun yang lalu (Napitupulu dkk, 2005). Ind...

Pendataan dan monitoring sangat diperlukan untuk mengetahui berapa banyak jumlah dan jenis ikan yang telah dimanfaatkan, sehingga dapat mengantisipasi pengambilan ikan yang melampaui ambang batas aman untuk ditangkap. Saat ini terdapat beberapa daerah yang memiliki pemanfaatan ikan hias laut namun belum memiliki data lengkap terkait pemanfaatan ika...

Perdagangan ikan hias laut adalah industri besar dengan total perdagangan sekitar USD 200-350 juta dalam setahun. Salah satu kawasan tangkap ikan hias utama di Indonesia adalah Jakarta (Kepulauan Seribu). Populasi ikan hias diamati dengan metode visual sensus menggunakan transek sabuk setiap dua tahun sekali, yang kemudian dianalisis untuk mengetah...

Pada tahun 2009, penutupan karang keras tertinggi ditemukan di Pulau Kotok Kecil dengan 64,59% dan terendah di P. Panjang Besar dengan nilai 7,45%. Penutupan karang mati tertinggi ditemukan di P. Nyamplung dengan 70,34%. Penutupan alga tertinggi ditemukan di Pulau Panjang dengan 50,55%. Dari 19 lokasi yang diamati secara terus-menerus dari tahun 20...

Octocorallia di perairan Kepulauan Seribu ditemukan sebanyak 25 marga dari 12 suku. Kelimpahan koloni tertinggi ditemukan di Pulau karang Congkak dengan kelimpahan 69.125 koloni/ha, sedangkan terendah ditemukan di Pulau sepa dengan hanya 125 koloni/ha. Kelimpahan koloni pada tingkat suku didominasi oleh suku Alcyoniidae, Clavulariidae, Briariidae,...

Kekayaan jenis ikan karang pada 2009 adalah sebanyak 168 jenis yang termasuk ke dalam 81 marga dan 31 suku. Kelimpahan total ikan karang di Taman Nasional Kepulauan Seribu sebanyak 55.104 ind/ha. Kelimpahan ikan karang tertinggi ditemukan di Pulau Panggang (115.250 ind/ha) sedangkan terendah ditemukan di Pulau Dua Timur (19.888 ind/ha). Total bioma...

Hampir semua bentuk permasalahan pesisir dan laut dapat kita temui di Kepulauan Seribu. Untuk mengatasi masalah tersebut, TERANGI berusaha membantu pengelolaan kawasan Kepulauan Seribu melalui tiga pendekatan, yaitu pengelolaan perikanan ornamental, pendidikan dan pelatihan, serta ekowisata berbasis masyarakat yang dilakukan dari tahun 2002 sampai...

Rerata penutupan karang keras (KK) di Kepulauan Seribu mengalami fluktuasi yaitu 33,1% (2003), 34,2% (2005), dan 31,7% (2007). Secara statistik, tidak ada perbedaan nyata pada tutupan karang keras secara temporal dari tahun 2003, 2005, ke 2007. Terdapat 63 marga (2005) dan 62 marga (2007) karang keras yang ditemukan di Kepulauan Seribu. Marga yang...

Jutaan ekor ikan hias dari terumbu karang diperjualbelikan di pasar internasional setiap tahunnya. Industri akuarium air laut merupakan perikanan yang selektif dan berkembang pesat. Sehingga menciptakan ancaman bagi populasi ikan karang. Kepulauan Seribu merupakan salah satu sentar perdagangan ikan hias di Indonesia, baik untuk pasar lokal maupun p...

Pemanfaatan ekosistem terumbu karang yang tidak ramah lingkungan menjadi faktor penyebab kerusakan ekosistem terumbu karang di Indonesia. Berbagai upaya rehabilitasi dilakukan untuk menjaga keberadaan ekosistem terumbu karang, seperti artificial reef, transplantasi karang dan stimulasi listrik. Semua upaya rehabilitasi tersebut membutuhkan data per...