A coral reef health study and its problem in Leti, Moa and Wetar Island, Mollucas Province

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.

Download Full-text

Bioeroding sponge assemblages: the importance of substrate availability and sediment

Journal of the Marine Biological Association of the United Kingdom ◽

10.1017/s0025315418000164 ◽

2018 ◽

Vol 99 (2) ◽

pp. 343-358 ◽

Cited By ~ 3

Author(s):

Joseph Marlow ◽

Christine H.L. Schönberg ◽

Simon K. Davy ◽

Abdul Haris ◽

Jamaluddin Jompa ◽

...

Keyword(s):

Coral Reef ◽

Environmental Factors ◽

Spatial Variation ◽

Environmental Conditions ◽

Sponge Species ◽

Coral Mortality ◽

Substrate Availability ◽

Abiotic Conditions ◽

Assemblage Composition ◽

Reef Health

Despite global deterioration of coral reef health, not all reef-associated organisms are in decline. Bioeroding sponges are thought to be largely resistant to the factors that stress and kill corals, and are increasing in abundance on many reefs. However, there is a paucity of information on how environmental factors influence spatial variation in the distribution of these sponges, and how they might be affected by different stressors. We aimed to identify the factors that explained differences in bioeroding sponge abundance and assemblage composition, and to determine whether bioeroding sponges benefit from the same environmental conditions that can contribute towards coral mortality. Abundance surveys were conducted in the Wakatobi region of Indonesia on reefs characterized by different biotic and abiotic conditions. Bioeroding sponges occupied an average of 8.9% of available dead substrate and variation in abundance and assemblage composition was primarily attributed to differences in the availability of dead substrate. Our results imply that if dead substrate availability increases as a consequence of coral mortality, bioeroding sponge abundance is also likely to increase. However, bioeroding sponge abundance was lowest on a sedimented reef, despite abundant dead substrate. This suggests that not all forms of coral mortality will benefit all bioeroding sponge species, and sediment-degraded reefs are likely to be dominated by a few resilient bioeroding sponge species. Overall, we demonstrate the importance of understanding the drivers of bioeroding sponge abundance and assemblage composition in order to predict possible impacts of different stressors on reefs communities.

Download Full-text

More reserves, less seaweed for coral reef health

ECOS ◽

10.1071/ec12353 ◽

2012 ◽

Keyword(s):

Coral Reef ◽

Reef Health

Download Full-text

Terrestrial degradation impacts on coral reef health: Evidence from the Caribbean

Ocean & Coastal Management ◽

10.1016/j.ocecoaman.2017.09.005 ◽

2017 ◽

Vol 149 ◽

pp. 52-68 ◽

Cited By ~ 8

Author(s):

Michaela Roberts ◽

Nick Hanley ◽

Sam Williams ◽

Will Cresswell

Keyword(s):

Coral Reef ◽

Reef Health ◽

The Caribbean

Download Full-text

Hyperspectral Remote Sensing and Radiative Transfer Simulation as a Tool for Monitoring Coral Reef Health

Marine Technology Society Journal ◽

10.4031/002533202787914205 ◽

2002 ◽

Vol 36 (1) ◽

pp. 4-13 ◽

Cited By ~ 10

Author(s):

Hiroya Yamano ◽

Masayuki Tamura ◽

Yoshimitsu Kunii ◽

Michio Hidaka

Keyword(s):

Remote Sensing ◽

Coral Reef ◽

Radiative Transfer ◽

Feasibility Studies ◽

Hyperspectral Remote Sensing ◽

Hyperspectral Data ◽

Dead Coral ◽

Hyperspectral Sensors ◽

Reef Health ◽

Radiative Transfer Modeling

Recent advances in the remote sensing of coral reefs include hyperspectral remote sensing and radiative transfer modeling. Hyperspectral data can be regarded as continuous and the derivative spectroscopy is effective for extracting coral reef components, including sand, macroalgae, and healthy, bleached, recently dead, and old dead coral. Radiative transfer models are effective for feasibility studies of satellite or airborne remote sensing. Using these techniques, we simulate and analyze the apparent reflectance of coral reef benthic features associated with bleaching events, obtained by hyperspectral sensors on various platforms (ROV, boat, airplane, and satellite), and suggest that the coral reef health on reef flats can be discriminated precisely. Remote sensing using hyperspectral sensors should significantly contribute to mapping and monitoring coral reef health.

Download Full-text

Coral reef health and effects of socio-economic factors in Fiji and Cook Islands

Marine Pollution Bulletin ◽

10.1016/s0025-326x(02)00260-6 ◽

2002 ◽

Vol 44 (11) ◽

pp. 1281-1293 ◽

Cited By ~ 22

Author(s):

Tegan Churcher Hoffmann

Keyword(s):

Coral Reef ◽

Economic Factors ◽

Cook Islands ◽

Reef Health ◽

Socio Economic Factors

Download Full-text

KONDISI TERUMBU KARANG PULAU MANTEHAGE KABUPATEN MINAHASA UTARA PROVINSI SULAWESI UTARA

JURNAL PESISIR DAN LAUT TROPIS ◽

10.35800/jplt.7.3.2019.24466 ◽

2019 ◽

Vol 7 (3) ◽

pp. 208

Author(s):

Ardy Kase ◽

Indri Manembu ◽

Joshian Schaduw

Keyword(s):

Coral Reef ◽

Coral Reefs ◽

Anthropogenic Activities ◽

Good Condition ◽

Digital Camera ◽

Health Conditions ◽

Point Count ◽

Lack Of Information ◽

Reef Health ◽

Moderate Condition

Coral reefs are coastal ecosystems with the highest level of diversity. Corals are invertebrates that are included in the Phylum Coelenterata (hollow animal) or Cnidaria. Whereas coral reefs are a collection of millions of polyps. Natural phenomena and various anthropogenic activities threaten the health and presence of Mantehage Island coral reefs and the lack of information about the health conditions of coral reefs on Mantehage Island. The purpose of this study is to determine the condition of coral reefs andto provide baselines data on Mantehage Island. Data collection was done by using UPT method (Underwater Photo Transect). Underwater Photo Transect carried out by underwater shooting using a digital camera that was shielded (housing). Image analysis were done using the CPCe software (Coral Point Count with Excel extensions). The results of coral reef health conditions at four stations on Mantehage Island shows, coral reef cover at each station as follows, station 1 (one) 53.00% were in good condition, station 2 (two) 25.40% were in a moderate condition, station 3 (three) 16.49% were in poor condition, and station 4 (four) 42.07% were in a moderate condition. From the four stations, the condition of Mantehage Island's coral reefs were in the moderate category with a percentage of 34.24%.Keywords:. Mantehage Island, Terumbu Karang, UPT, CPCe

Download Full-text

Mysterious Coral Reef Halos Can Be Seen from Space

Eos ◽

10.1029/2019eo122611 ◽

2019 ◽

Vol 100 ◽

Author(s):

Mary Morton

Keyword(s):

Coral Reef ◽

Reef Health

Grazing rings around reefs have the potential to be used as a tool for monitoring reef health, but first, scientists have to figure out what factors govern halo size differences.

Download Full-text