scholarly journals Status Terkini Tutupan Terumbu Karang di Perairan Dangkal Pulau Bedil, Desa Labuan Bajo, Kabupaten Sumbawa, NTB

2021 ◽  
pp. 243-253
Author(s):  
Mahardika Rizqi Himawan ◽  
Eni Hidayati ◽  
Nurliah Buhari ◽  
Sitti Hilyana ◽  
Maulita Syahdina
Keyword(s):  
Coral Reef ◽  
Coral Reefs ◽  
Small Island ◽  
Percent Cover ◽  
Coral Mortality ◽  
Dead Coral ◽  
The North ◽  
Mortality Index ◽  
Coral Reef Ecosystems ◽  
Index Value

Bedil Island is included in the Keramat, Bedil, and Temudong Small Island Park (TPK), which was approved by the Regent of Sumbawa. Administratively, this island is included in the Labuan Bajo Village area, Sumbawa, NTB. There is the existence of coral reef ecosystems in these waters that form a reef flat and reef slope profile, that stretches to the southwest and northeast. By its designation as a small island park, the coral reefs in Bedil Island are used as an underwater tourism object. This study aims to determine the current condition of coral reef cover in the waters around Bedil Island, especially in the eastern and southern parts of the island. Coral reefs in the north and west area are limited and there is the existence of seagrass beds. The line intercept transect method is carried out by spreading the roll meter as far as 50 meters on the east and south sides of the island with a depth of 2-3 meters. The coral lifeform that is tangent with the roll meter is then recorded and then analyzed for the average percent cover, clustering status, and coral mortality index. Coral reefs in the eastern and southern parts of Bedil Island are classified as very good/excellent because they have a percent cover value above 75%. In addition, the coral mortality index value is also relatively small which indicates that the corals are living well. Clearwater conditions and locations far from human settlements are thought to be factors that support coral survival. However, the presence of dead coral algae and rubble still indicates a threat of damage even though the value is small. Algae life on the surface of dead coral also indicates that the coral has been dead for a long time. 

scholarly journals KONDISI EKOSISTEM TERUMBU KARANG DI PERAIRAN KRUENG RAYA, KABUPATEN ACEH BESAR

2021 ◽  
Vol 8 (1) ◽  
pp. 11
Author(s):  
Nurul Najmi ◽  
M Rizki Fazillah ◽  
Muhammad Agustiar
Keyword(s):  
Coral Reef ◽  
Coral Cover ◽  
Live Coral ◽  
Coral Mortality ◽  
Coral Reef Ecosystem ◽  
Dead Coral ◽  
High Increase ◽  
Mortality Index ◽  
Malacca Strait ◽  
Reef Ecosystem

This study aims to analyze the condition of the coral reef ecosystem including the substrate, genus composition, and the level of coral mortality in the waters of the Malacca Strait, Masjid Raya District, Aceh Besar District. The research was conducted from October 2016 to October 2019 in the waters of the Malacca Strait, Masjid Raya District, Aceh Besar District. The research site is divided into three stations consisting of Lhok Mee Station, Ahmad Rhang Manyang and Benteng Inong Balee Station. Data were collected using the Point Intercept Transect method. The results showed that the condition of coral reefs at Lhok Mee Station was in the damaged category with coral cover ranging from 6.56% - 13.44%. Ahmad Rhang Manyang Station is included in the moderate to good category with coral cover ranging from 38.75% - 67.19%. Meanwhile, Benteng Inong Balee Station is included in the medium category with coral cover ranging from 45.94% - 56.88%. The monitoring results found that 30 coral genera with the highest composition of the coral genera came from the Porites genus, while other coral genera were unevenly distributed. The value of the mortality index for Lhok Mee Station shows a high increase in mortality of live coral to dead coral. Meanwhile, Ahmad Rhang Manyang and Benteng Inong Balee stations have low coral mortality index values.

scholarly journals Kajian Kondisi dan Nilai Ekonomi Manfaat Ekosistem Terumbu Karang di Pantai Wediombo, Kabupaten Gunung Kidul, Daerah Istimewa Yogyakarta

2016 ◽  
Vol 14 (2) ◽  
pp. 82
Author(s):  
Heriawan Maulana ◽  
Sutrisno Anggoro ◽  
Bambang Yulianto
Keyword(s):  
Coral Reef ◽  
Coral Reefs ◽  
Common Property ◽  
Economic Valuation ◽  
Economic Value ◽  
Survey Method ◽  
Economic Losses ◽  
Percent Cover ◽  
Coral Reef Ecosystems ◽  
Line Intercept

ABSTRAKPerairan Wediombo Kabupaten Gunung Kidul yang telah ditetapkan sebagai Pencadangan Kawasan Konservasi Perairan Daerah pada tahun 2013. Pemanfaatan wilayah Pantai Wediombo oleh masyarakat sebagai lokasi pendaratan ikan dan pariwisata mengakibatkan peningkatan tekanan terhadap ekosistem perairan khususnya terumbu karang. Sebagai common property, kerusakan ekosistem terumbu karang tidak dirasakan sebagai kerugian ekonomi sehingga eksploitasi dari manfaat ekosistem terumbu karang menjadi tidak terkendali. Pengelolaan Pantai Wediombo menjadi tantangan bagi stakeholder untuk dapat mengoptimalkan pemanfaatan jasa lingkungan bagi kesejahteraan masyarakat. Salah satu komponen upaya pengelolaannya yaitu dengan melakukan pemantauan kondisi terumbu karang di Pantai Wediombo. Valuasi ekonomi ekosistem termbu karang merupakan instrumen untuk menilai produk dan jasa yang dihasilkan oleh ekosistem terumbu karang. Tujuan dari penelitian ini adalah untuk mengetahui kondisi ekosistem terumbu karang yang diwakili oleh persen tutupan terumbu karang dan nilai manfaat ekosistem terumbu karang yang diwakili oleh produk perikanan yang dihasilkan dari ekosistem terumbu karang di Pantai Wediombo. Metode yang digunakan adalah metode survei. Metode pengumpulan data kondisi terumbu karang mengacu pada metode Line Intercept Transect (LIT). sedangkan nilai ekonomi manfaat ekosistem terumbu karang dihitung menggunakan metode Effect on Productivity. Pada penelitian diperoleh hasil prosentase tutupan terumbu karang di Pantai Wediombo sebesar 25,29% dengan status kondisi rusak sedang. nilai ekonomi aktual ekosistem terumbu karang di Pantai Wediombo sebesar Rp. 634.553.504,-, sedangkan nilai manfaat sekarang dari ekosistem terumbu karang di Pantai Wediombo sebesar Rp. 20.304.872,-.Kata kunci: Ekosistem Terumbu Karang, Valuasi Ekonomi, Pantai Wediombo ABSTRACTBodies Wediombo Gunung Kidul regency which has been designated as a Local Backup Water Conservation Area in 2013. Utilization Wediombo Turkish territory by the public as a fish landing site and tourism resulted in increased pressure on aquatic ecosystems, especially coral reefs. As common property, damage to coral reefs is not perceived as economic losses so that the exploitation of the benefits of coral reef ecosystems had become unmanageable. Wediombo Coastal management is a challenge for stakeholders to be able to optimize the use of environmental services for the welfare of society. One component management efforts is by monitoring the condition of coral reefs in Wediombo Beach. Economic valuation of coral ecosystems termbu is an instrument to assess the products and services produced by a coral reef ecosystems. The purpose of this study was to determine the condition of coral reef ecosystems are represented by percent cover of coral reefs and coral reef ecosystems benefit value represented by the fishery products produced from coral reef ecosystems Wediombo Beach. The method used is a survey method. Methods of data collection coral reef condition refers to a method Line Intercept Transect (LIT). while the economic value of coral reef ecosystem benefits are calculated using methods Effect on Productivity. In the research results the percentage of coral reef cover in Turkish Wediombo of 25.29% with a damaged condition status. the true economic value of coral reef ecosystems Wediombo Coast of Rp. 634 553 504, -, while the value of current benefits of coral reef ecosystems Wediombo Coast of Rp. 20,304,872, -.Keywords:  Coral Reef Ecosystems, Economic Valuation, Turkish WediomboCara sitasi: Maulana, H., Anggoro, S., Yulianto, B. (2016). Kajian Kondisi dan Nilai Ekonomi Manfaat Ekosistem Terumbu Karang di Pantai Wediombo, Kabupaten Gunung Kidul, Daerah Istimewa Yogyakarta. Jurnal Ilmu Lingkungan,14(2),82-87, doi:10.14710/jil.14.2.82-87

scholarly journals STRUKTUR KOMUNITAS TERUMBU KARANG DI PERAIRAN TELUK BALIKPAPAN, KALIMANTAN TIMUR

Jurnal Segara ◽  
2020 ◽  
Vol 16 (1) ◽  
Author(s):  
Niken Financia Gusmawati ◽  
Candra Dwi Puspita ◽  
Herlina Ika Ratnawati
Keyword(s):  
Coral Reef ◽  
Coral Reefs ◽  
Environmental Changes ◽  
Coral Cover ◽  
Nitrate Content ◽  
Marine Biota ◽  
Coral Reef Ecosystem ◽  
Coral Reef Ecosystems ◽  
Index Value ◽  
Reef Ecosystem

Coral reefs are ecosystems with high productivity while being very vulnerable to environmental changes. The oil spill incident in Balikpapan Bay in 2018 still caused damage to the coral reef ecosystem in Tanjung Jumlai, Penajam Paser Utara Regency, East Kalimantan due to the use of dispersants in handling oil spills. Research on the condition of coral reefs is carried out to ensure the sustainability of the benefits of ecosystem products and services provided by coral reef ecosystems to communities around Balikpapan Bay. Coral reef research has been carried out at three transect station locations in the Tanjung Jumlai reef area. This research is aimed to determine the distribution, abundance, and structure of coral reef ecosystems in these waters. The study was conducted in October 2019. Data collection was carried out using the Point Intercept Transect (PIT) method. The results showed that the average percentage of coral cover was 55.7% with a good coral cover category. Substrate covering the bottom of the coral reef ecosystem is dominated by Acropora Tubulate and Acropora Branching from the biotic component, and Dead Coral with Algae and Rubble from the abiotic component. Diversity index value (H') in the waters is categorized as low species richness. This research has been identified only 10 genera in the study area where 9 genera are hard coral species. Similarity Index value (E) included in the medium category and dominance index value (D) belong to the medium category which means that there are no species that are very dominant in the observation area. Water quality at station 1 representing all observation stations shows results that the study area are still appropriate for marine biota according to Minister of Environment Decree 51/2004, except for nitrate content. Sediments also show no trace of hydrocarbons.Coral reefs are ecosystems with high productivity while being very vulnerable to environmental changes. The oil spill incident in Balikpapan Bay in 2018 still caused damage to the coral reef ecosystem in Tanjung Jumlai, Penajam Paser Utara Regency, East Kalimantan due to the use of dispersants in handling oil spills. Research on the condition of coral reefs is carried out to ensure the sustainability of the benefits of ecosystem products and services provided by coral reef ecosystems to communities around Balikpapan Bay. Coral reef research has been carried out at three transect station locations in the Tanjung Jumlai reef area. This research is aimed to determine the distribution, abundance, and structure of coral reef ecosystems in these waters. The study was conducted in October 2019. Data collection was carried out using the Point Intercept Transect (PIT) method. The results showed that the average percentage of coral cover was 55.7% with a good coral cover category. Substrate covering the bottom of the coral reef ecosystem is dominated by Acropora Tubulate and Acropora Branching from the biotic component, and Dead Coral with Algae and Rubble from the abiotic component. Diversity index value (H') in the waters is categorized as low species richness. This research has been identified only 10 genera in the study area where 9 genera are hard coral species. Similarity Index value (E) included in the medium category and dominance index value (D) belong to the medium category which means that there are no species that are very dominant in the observation area. Water quality at station 1 representing all observation stations shows results that the study area are still appropriate for marine biota according to Minister of Environment Decree 51/2004, except for nitrate content. Sediments also show no trace of hydrocarbons.

scholarly journals Analisis Keanekaragaman Dekapoda Pada Karang Mati (Genus : Acropora sp.) Di Pantai Pelabuh Dalam Tuing Dan Pantai Turun Aban, Kabupaten Bangka

2019 ◽  
Vol 13 (1) ◽  
pp. 52-60
Author(s):  
Umam Kamarullah ◽  
Wahyu Adi ◽  
Indra Ambalika Syari
Keyword(s):  
Coral Reef ◽  
Diversity Index ◽  
Data Retrieval ◽  
Species Diversity Index ◽  
Ecological Functions ◽  
Dominance Index ◽  
Dead Coral ◽  
Average Value ◽  
Coral Reef Ecosystems ◽  
Index Value

Decapoda is a ten-legged invertebrate organism macro such as shrimp, crabs and lobster. Dekapoda is an association biota with a coral reef ecosystem that has ecological functions, namely as detritus feeders and as a food source for other biota in the food chain in coral reef ecosystems. This aims of this study to analyze the diversity and density of decapods species on dead corals of Acropora sp. at Pelabuh Dalam Tuing and Turun Aban Beach. This research was conducted in July-August 2018 at the Pelabuh Dalam Tuing and Turun Aban Beach. Decapoda data retrieval uses the Dead Coral Head method. The results of the study on Pelabuh Dalam Tuing Beach found 140 individuals from 9 species of Decapoda on Acropora sp dead corals while Turun Aban Beach were found 242 individuals from 11 species. Diversity index values in both study locations 2,510 and 2,533. The uniformity index value in both study locations 0,884 and 0,871. The dominance index values in the two study locations 0,214 and 0,208. Species density in both study locations had an average value of 0.0121 ind/ and 0.0165 ind/.

scholarly journals Les rivages des Bermudes et les formes littorales de dissolution du calcaire

2005 ◽  
Vol 2 (2) ◽  
pp. 115-137 ◽  
Author(s):  
François Taillefer
Keyword(s):  
Coral Reef ◽  
Coral Reefs ◽  
Mechanical Action ◽  
Intermediate Position ◽  
Striking Feature ◽  
Tidal Range ◽  
Intermediate Type ◽  
North East ◽  
The North

The littoral morphology of the Bermudas is an erosional morphology in limestones, the main processes being mechanical action and solution. The temperatures, in January and February, of the waters washing the Bermudas, are low enough to prevent the growing of true coral reefs. Therefore, it is not the morphology of a coral reef. The predominance of wave-cut cliffs is the most striking feature, despite the low and gently rolling topography. There are, however, other types of coasts on the islands, the mangrove being found on many sheltered shores. The writer thus opposes the sheltered shores of the sounds to the ones exposed on the southcoast, while the shores of the north and north-east coasts belong to an intermediate type. The steplike arrangement of the coastal forms of solution of the Bermudas limestones is primarily linked to the amount of the tidal range. These features are similar to those described on the shores of the warm seas, where the tide is negligible or weak. The Bermudas occupy an intermediate position between the regions where reefs are built by corals, and those, to the north, where solution, helped by other processes, occurs without compensation.

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

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.

scholarly journals Representative benthic habitat mapping on Lovina coral reefs in Northern Bali, Indonesia

2021 ◽  
Vol 22 (11) ◽  
Author(s):  
Anggita Kartikasari ◽  
TODHI PRISTIANTO ◽  
RIZKI HANINTYO ◽  
EGHBERT ELVAN AMPOU ◽  
TEJA ARIEF WIBAWA ◽  
...  
Keyword(s):  
Coral Reef ◽  
Coral Reefs ◽  
Habitat Mapping ◽  
Benthic Habitat ◽  
Coral Rubble ◽  
Spatial Coverage ◽  
Coral Reef Ecosystems ◽  
Optical Imagery ◽  
Sentinel 2

Abstract. Kartikasari A, Pristianto T, Hanintyo R, Ampou EE, Wibawa TA, Borneo BB. 2021. Representative benthic habitat mapping on Lovina coral reefs in Northern Bali, Indonesia. Biodiversitas 22: 4766-4774. Satellite optical imagery datasets integrated with in situ measurements are widely used to derive the spatial distribution of various benthic habitats in coral reef ecosystems. In this study, an approach to estimate spatial coverage of those habitats based on observation derived from Sentinel-2 optical imagery and a field survey, is presented. This study focused on the Lovina coral reef ecosystem of Northern Bali, Indonesia to support deployment of artificial reefs within the Indonesian Coral Reef Garden (ICRG) programme. Three specific locations were explored: Temukus, Tukad Mungga, and Baktiseraga waters. Spatial benthic habitat coverages of these three waters was estimated based on supervised classification techniques using 10m bands of Sentinel-2 imagery and the medium scale approach (MSA) transect method of in situ measurement.The study indicates that total coverage of benthic habitat is 61.34 ha, 25.17 ha, and 27.88 ha for Temukus, Tukad Mungga, and Baktiseraga waters, respectively. The dominant benthic habitat of those three waters consists of sand, seagrass, coral, rubble, reef slope and intertidal zone. The coral reef coverage is 29.48 ha (48%) for Temukus covered by genus Acropora, Isopora, Porites, Montipora, Pocillopora. The coverage for Tukad Mungga is 8.69 ha (35%) covered by genus Acropora, Montipora, Favia, Psammocora, Porites, and the coverage for Baktiseraga is 11.37 ha (41%) covered by genus Montipora sp, Goniastrea, Pavona, Platygyra, Pocillopora, Porites, Acropora, Leptoseris, Acropora, Pocillopora, Fungia. The results are expected to be suitable as supporting data in restoring coral reef ecosystems in the northern part of Bali, especially in Buleleng District.

scholarly journals Divergence of seafloor elevation and sea level rise in coral reef ecosystems

2017 ◽  
Vol 14 (6) ◽  
pp. 1739-1772 ◽  
Author(s):  
Kimberly K. Yates ◽  
David G. Zawada ◽  
Nathan A. Smiley ◽  
Ginger Tiling-Range
Keyword(s):  
Coral Reef ◽  
Coral Reefs ◽  
Sea Level Rise ◽  
Sea Level ◽  
Anthropogenic Impacts ◽  
Regional Scale ◽  
Coastal Hazards ◽  
Carbonate Production ◽  
Coral Reef Ecosystems ◽  
Study Sites

Abstract. Coral reefs serve as natural barriers that protect adjacent shorelines from coastal hazards such as storms, waves, and erosion. Projections indicate global degradation of coral reefs due to anthropogenic impacts and climate change will cause a transition to net erosion by mid-century. Here, we provide a comprehensive assessment of the combined effect of all of the processes affecting seafloor accretion and erosion by measuring changes in seafloor elevation and volume for five coral reef ecosystems in the Atlantic, Pacific, and Caribbean over the last several decades. Regional-scale mean elevation and volume losses were observed at all five study sites and in 77 % of the 60 individual habitats that we examined across all study sites. Mean seafloor elevation losses for whole coral reef ecosystems in our study ranged from −0.09 to −0.8 m, corresponding to net volume losses ranging from 3.4  ×  106 to 80.5  ×  106 m3 for all study sites. Erosion of both coral-dominated substrate and non-coral substrate suggests that the current rate of carbonate production is no longer sufficient to support net accretion of coral reefs or adjacent habitats. We show that regional-scale loss of seafloor elevation and volume has accelerated the rate of relative sea level rise in these regions. Current water depths have increased to levels not predicted until near the year 2100, placing these ecosystems and nearby communities at elevated and accelerating risk to coastal hazards. Our results set a new baseline for projecting future impacts to coastal communities resulting from degradation of coral reef systems and associated losses of natural and socioeconomic resources.

scholarly journals KOMPOSISI PENYUSUN TERUMBU KARANG TEPI (FRINGING REEF) DI PULAU MANDANGIN KABUPATEN SAMPANG, MADURA The Composition of Fringing Reef Formation in Pulau Mandangin, Sampang Province, Madura

2016 ◽  
Vol 11 (2) ◽  
pp. 94
Author(s):  
Guntur Guntur ◽  
Samsul Arifin ◽  
Oktiyas Muzaky Luthfi
Keyword(s):  
Coral Reef ◽  
Reef Slope ◽  
Small Island ◽  
Dead Coral ◽  
Fringing Reef ◽  
Transect Line ◽  
Base Substrate ◽  
Line Intercept ◽  
Substrate Types ◽  
Reef Formation

ABSTRAK   Terumbu karang tepi di Pulau Mandangin tersusun substrat biotik dan abiotik dengan kedalaman tidak lebih dari 40 m. Pulau Mandangin adalah pulau kecil yang memiliki komposisi substrat dasar seperti terumbu karang dan perairannya yaitu zona leeward dan zona windward. Zona leeward adalah sisi yang membelakangi arah datangnya angin, sedangkan zona windward adalah sisi yang menghadap arah datangnya angin. Tujuan dari penelitian ini adalah untuk mengetahui komposisi penyusun terumbu karang tepi (fringing reef) dan mengetahui perbedaan komposisi penyusun terumbu karang tepi (fringing reef) antara zona leeward dan zona windward di Pulau Mandangin. Metode yang digunakan adalah Line Intercept Transect (LIT) secara vertikal, LIT dimulai dari surut terendah sampai daerah reef slope dan dilakukan pencatatan semua jenis substrat yang dibawah garis transek. Hasil penelitian menunjukkan zona fringing reef yang mengelilingi Pulau Mandangin tersusun atas substrat rubble, sand, alga, rock, dead coral, dead coral with algae, sponge, coral massive dan coral submassive. Zona leeward lebih bervariasi dari zona windward dalam susunan fringing reef. Hal ini karena angin yang terjadi di zona windward lebih besar dari zona leeward, sehingga substrat di zona windward hanya rubble dan sand.   Kata kunci: Fringing reef, zona windward, zona leeward, substrat, Pulau Mandangin     ABSTRACT  Fringing reef in Mandangin Island comprises of biotic and abiotic substrates in depth not more than 40 m. Mandangin Island is a small island with base substrate composition mostly involving coral reef. The waters include leeward and windward zones. Leeward zone is paralleling with wind incoming direction, whereas windward zone is facing on wind incoming direction. The objective of research is to understand the composition that constitutes fringing reef and to recognize different constitutive composition of fringing reef at leeward zone and windward zone in Mandangin Island. Method of research is Line Intercept Transect (LIT) that is applied vertically. LIT starts from the lowest ebb toward the reef slope zone, and it involves registering all substrate types below transect line. Result of research indicates that fringing zone surrounding Mandangin Island consists of various substrates such as rubble, sand, alga, rock, dead coral, dead coral with algae, sponge, coral massive and coral sub-massive. Leeward zone is more diversified in fringing reef composition than windward zone. It is evident because wind occurrence at windward zone is higher than at leeward zone, and thus, substrates at windward zone include only rubble and sand. Keywords: Fringing reef, windward zone, leeward zone, substrates, Mandangin Island

The scientific issues surrounding remote detection of submerged coral ecosystems

1998 ◽  
Vol 22 (2) ◽  
pp. 190-221 ◽  
Author(s):  
Heather Holden ◽  
Ellsworth LeDrew
Keyword(s):  
Remote Sensing ◽  
Coral Reef ◽  
Coral Reefs ◽  
Large Scale ◽  
Aerial Photographs ◽  
Coastal Zones ◽  
Global Status ◽  
Coral Reef Ecosystems ◽  
Remote Estimation

According to the 1993 colloquium on the ‘Global status of coral reefs', our understanding of the global role of coral reefs is inadequate. To increase our understanding, an accurate large-scale mapping and monitoring programme is necessary. Historically, coastal zones have been mapped using traditional surveying tools such as topographic maps, nautical charts, existing aerial photographs and direct observations. Although less expensive than digital imagery, exclusive use of these traditional tools may not be practical for monitoring large or remote coral reef ecosystems accurately. Researchers are attempting to develop an adequate coral reef mapping system based on digital remote sensing, but are impeded by issues such as effects of the intervening water column and spectral distinction of bottom types. The two variables discussed, which will contribute to our understanding of the global role of coral reefs, are: 1) remote sensing of submerged coral reefs in general; and 2) remote sensing of coral bleaching in particular. A summary of radiative transfer theory is presented and case studies of attempts at mapping remotely the geographic extent and health of submerged ecosystems, as well as a discussion of the remote estimation of water depth and quality. Problems in the translation and delivery of information to the end user are presented, and possible solutions suggested.

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