MONITORING CHANGES IN CORAL REEF HABITAT COVER ON BERALAS PASIR ISLAND USING SPOT 4 AND SPOT 7 IMAGERY FROM 2011 AND 2018

Beralas Pasir is part of the Regional Marine Conservation Area (KKLD), which was established by the Bintan Regency Government with Bintan Regent Decree No. 261 / VIII / 2007. Water tourism activities undertaken by tourists on the island have had an impact on the condition of the coral reefs, as have other factors, such as bauxite, granite and land sand mining activities around the island. This research aims to determine changes in the coral reef habitat cover and the condition of the coral reefs around Beralas Pasir Island with a remote sensing function, using SPOT 4 imagery acquired on June 1, 2011 and SPOT 7 imagery from April 5, 2020. Data collection of environmental parameters related to the coral reefs was also made. The image processing used the Lyzenga algorithm to simplify the image classification process. The percentage of coral live cover around the island ranges from 26% -53%; this has experienced a significant change, from 67,560 hectares in 2011 to 38,338 hectares in 2018, a total decrease in the area of 29,222 hectares. Some of the natural factors found in the research which have caused damage to the reefs were Drupella snails, the abundance of Caulerpa racemosaalgae, and sea urchins. The majority of the coral reef types consist of Non-Acropora: Coral Massive, Coral, Coral Foliose, Coral Encrusting, Acropora: Acropora Tabulate, Acropora Encrusting, and Acropora Digitate

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CORAL REEF CONDITION AND HARD CORAL (SCLERACTINIA) COMUNITY IN LOCAL MARINE CONSERVATION AREA, BENGKAYANG, WEST KALIMANTAN

KnE Life Sciences ◽

10.18502/kls.v2i1.205 ◽

2015 ◽

Vol 2 (1) ◽

pp. 507

Author(s):

Miftahul Huda ◽

Suwarno Hadisusanto ◽

Encus Widyatmoko

Keyword(s):

Coral Reef ◽

Coral Reefs ◽

Coral Community ◽

Marine Conservation ◽

Hard Coral ◽

Coral Reef Ecosystem ◽

Conservation Area ◽

West Kalimantan ◽

Economical Aspect ◽

Reef Ecosystem

Coral reef ecosystem has diverse shape and stunning beauty. It has high value on both ecological and economical aspect it has productivity greater than other marine life. Local Marine Conservation Area, Bengkayang, West Kalimantan (Lemukutan island, Penata Besar island, Penata Kecil island, Seluas island, Rahdayan island) has a high potential on coastal and marine natural resources especially coral reefs ecosystem. The study was purposed to determine the condition coral reef ecosystem and the diversity of hard corals (Scleractinia). Samples have been taking from 5-7 meters depth in every point using Line Intercept Transect method (LIT). The observation result from the coral reef in Local Marine Conservation Area showed as the followings varies from bad to good (13.82 – 69.00%), but biotic components were found in each area that consist of sediment with percentage of 4.32-37.68% and the rock of 2.57- 38.22%. Hard coral community consists of 35 species including seven families. Genus Acropora as hard coral species is dominating the five islands. The damage of coral reefs that occurs in most of the study area is due to increased suspended material (sediments). Keywords: Coral reefs, Scleractinia, Acropora, LIT, Local Marine Conservation Area, Bengkayang, West Kalimantan.

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Characterizing the deep insular shelf coral reef habitat of the Hind Bank marine conservation district (US Virgin Islands) using the Seabed autonomous underwater vehicle

Continental Shelf Research ◽

10.1016/j.csr.2005.10.004 ◽

2006 ◽

Vol 26 (2) ◽

pp. 194-205 ◽

Cited By ~ 75

Author(s):

Roy A. Armstrong ◽

Hanumant Singh ◽

Juan Torres ◽

Richard S. Nemeth ◽

Ali Can ◽

...

Keyword(s):

Coral Reef ◽

Autonomous Underwater Vehicle ◽

Underwater Vehicle ◽

Virgin Islands ◽

Marine Conservation ◽

Reef Habitat ◽

Us Virgin Islands ◽

Coral Reef Habitat ◽

Insular Shelf

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Diversity and Coverage of Coral Reefs in the Olele Regional Marine Conservation Area, Gorontalo

International Journal of Innovative Technology and Exploring Engineering - Special Issue ◽

10.35940/ijitee.c1055.0193s20 ◽

2020 ◽

Vol 9 (3S) ◽

pp. 246-249

Keyword(s):

Coral Reef ◽

Coral Reefs ◽

Marine Protected Area ◽

Coral Cover ◽

Marine Conservation ◽

Coral Reef Ecosystem ◽

Conservation Areas ◽

Conservation Area ◽

Marine Park ◽

Reef Ecosystem

Olele Marine Park is one of the Regional Marine Conservation Areas (KKLD) which is designated as a conservation area based on the Decree of the Regent of Bone Bolango No. 165 of 2006. As one of the Marine Parks, the Olele KKLD provides a coral reef ecosystem which is an important asset in attracting local and foreign tourists to visit. Seeing tourism activities in the area referred to by monitoring and observing the condition of coral reefs is a big concern to do for the sake of ecosystem sustainability in the future. This study aims to study the extent and extent of coral cover in the Olele Regional Marine Protected Area. This research was conducted in April to May 2019 in Olele Village. The study used the LIT method at three stations at depths of 2 and 4 meters. The results showed station I depth 2 and 4 m wide coral cover 12.8% and 22.9% classified as bad, station II coral cover area 24.1% and 37.5% classified as poor on the surface of 2 m and moderate at height 4 m, while at station III the area of coral cover is 86.5% at a depth of 2 m and 95.4% a depth of 4 m with coral conditions that are still very good. For the index of coral reef diversity in the medium category.

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Submerged banks in the Great Barrier Reef, Australia, greatly increase available coral reef habitat

ICES Journal of Marine Science ◽

10.1093/icesjms/fss165 ◽

2012 ◽

Vol 70 (2) ◽

pp. 284-293 ◽

Cited By ~ 63

Author(s):

Peter T. Harris ◽

Thomas C.L. Bridge ◽

Robin J. Beaman ◽

Jody M. Webster ◽

Scott L. Nichol ◽

...

Keyword(s):

Coral Reef ◽

Coral Reefs ◽

Great Barrier Reef ◽

Global Ocean ◽

Suitable Habitat ◽

Barrier Reef ◽

Reef Habitat ◽

Deep Reef ◽

Coral Communities ◽

Coral Reef Habitat

Abstract Harris, P. T., Bridge, T. C. L., Beaman, R. J., Webster, J. M., Nichol, S. L., and Brooke, B. P. 2013. Submerged banks in the Great Barrier Reef, Australia, greatly increase available coral reef habitat. – ICES Journal of Marine Science, 70: 284–293. Anthropogenic global ocean warming is predicted to cause bleaching of many near-sea-surface (NSS) coral reefs, placing increased importance on deeper reef habitats to maintain coral reef biodiversity and ecosystem function. However, the location and spatial extent of many deep reef habitats is poorly known. The question arises: how common are deep reef habitats in comparison with NSS reefs? We used a dataset from the Great Barrier Reef (GBR) to show that only about 39% of available seabed on submerged banks is capped by NSS coral reefs (16 110 km2); the other 61% of bank area (25 600 km2) is submerged at a mean depth of around 27 m and represents potential deep reef habitat that is spatially distributed along the GBR continental shelf in the same latitudinal distribution as NSS reefs. Out of 25 600 km2 of submerged bank area, predictive habitat modelling indicates that more than half (around 14 000 km2) is suitable habitat for coral communities.

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Oculina Bank: Sidescan sonar and sediment data from a deep-water coral reef habitat off east-central Florida

Open-File Report ◽

10.3133/ofr9910 ◽

1999 ◽

Cited By ~ 2

Author(s):

Kathryn M. Scanlon ◽

Peter R. Briere ◽

Christopher C. Koenig

Keyword(s):

Coral Reef ◽

Deep Water ◽

Sidescan Sonar ◽

Reef Habitat ◽

East Central ◽

Central Florida ◽

Sediment Data ◽

Coral Reef Habitat ◽

Water Coral

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Grazing Effects of Fish versus Sea Urchins on Turf Algae and Coral Recruits: Possible Implications for Coral Reef Resilience and Restoration

Journal of Marine Biology ◽

10.1155/2011/960207 ◽

2011 ◽

Vol 2011 ◽

pp. 1-8 ◽

Cited By ~ 17

Author(s):

Leor Korzen ◽

Alvaro Israel ◽

Avigdor Abelson

Keyword(s):

Coral Reef ◽

Coral Reefs ◽

Sea Urchins ◽

Benthic Algae ◽

Herbivorous Fish ◽

Grazing Impact ◽

Turf Algae ◽

Coral Reef Resilience ◽

Drastic Increase ◽

The Impact

Herbivory is an important structuring factor in coral reefs, influencing seaweed abundance, competitive interactions between seaweeds and corals, and coral reef resilience. Despite reports of a drastic increase in the cover of benthic algae and turf dominancy in the coral reefs of Eilat, Red Sea, very little is known about the factors responsible for this phenomenon or the possible effects of herbivory on turf algae and coral recruits. Here, we examine the effects of herbivory by experimentally exposing turf algae and coral recruits to grazing activities of herbivorous fish and sea urchins. Using remote video cameras to document removal of algae and coral spats, we show that the main grazing impact is due to daily grazing by fishes, whereas the significant impact of sea urchins is mainly expressed in their adverse effect on the survival of coral recruits, with a relatively low effect on algal biomass. These findings contribute to our understanding of the factors influencing turf algae establishment and proliferation, and the survival of coral recruits on the coral reefs of Eilat. The clear differences between the impact of herbivorous fish and that of sea urchins, on the Eilat reefs, have critical implications for reef resilience and restoration measures.

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