Investigating incidence and possible causes of pink and purple pigmentation response in hard coral genus Porites around Okinawajima Island, Japan

Abstract Krueng Raya waters is an area that has a distribution of coral reef ecosystems. This study aims to determine the recruitment of hard corals after coral bleaching Krueng Raya waters, Aceh Besar District. This research was conducted in April 2017 in Krueng Raya, Aceh Besar. Data were collected at three observation stations using a systematic sampling method using a 1x1 m quadratic transect. Based on the study results, coral recruitment was obtained from eight families and 13 genera (Acropora, Cetenactis, Diploastrea, Favia, Favites, Galaxea, Goniastrea, Helliopora, Leptastrea, Montastrea, Pavona, Pocillopora, and Porites). Where the most abundant coral genus found was from the genus Pocilopora and Porites (16 coloni/10m2). while the station with the highest colony abundance was at station 3 with 28 colonies/10m2.

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The change of coral cover in Ujong Pancu waters, Peukan Bada Sub-District, Aceh Besar

IOP Conference Series Earth and Environmental Science ◽

10.1088/1755-1315/869/1/012051 ◽

2021 ◽

Vol 869 (1) ◽

pp. 012051

Author(s):

M Ulfah ◽

M Muliari ◽

F Azzahara ◽

N M Razi ◽

M R Fazillah ◽

...

Keyword(s):

Coral Reef ◽

Coral Reefs ◽

Coral Cover ◽

Hard Coral ◽

Ecological Functions ◽

Coral Genus ◽

The Earth ◽

Coral Reef Ecosystems ◽

Hard Coral Cover

Abstract Coral reef ecosystems are one of the most productive ecosystems on the earth, with large ecological functions. The disruption of coral reef ecosystems has a significant impact on the surrounding biota. This study aims to determine the condition of coral reefs for the last three years in Ujong Pancu waters, Peukan Bada sub-district, Aceh Besar district. This study uses data in 2017, 2018, and 2019 with three observation locations: Lhok Keeutapang, Lhok Mata Ie, and Tuan Island. The method used is Point Intercept Transect (PIT) with a transect length of 20 m with four repetitions. The results showed that the percentage of hard coral cover in the Ujong Pancu waters decreased from the good category (50.31%) in 2017 to moderate (47.81%) in 2019. The percentage with the highest coral cover was at the Lhok Keutapang location at 72, 81% in 2018, while the lowest coral cover at the Tuan Island location was 15.94% in 2017. The composition of the coral genus found also decreased from 12 coral genera (2017) to 9 coral genera (2019).

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BAKTERI PADA KARANG SCLERACTINIA DI KAWASAN PERAIRAN BUNAKEN, MOROTAI DAN RAJA AMPAT

JURNAL PESISIR DAN LAUT TROPIS ◽

10.35800/jplt.8.1.2020.28110 ◽

2020 ◽

Vol 8 (1) ◽

pp. 122

Author(s):

Eghbert Eghbert Elvan Eghbert Elvan Ampou ◽

Iis Iis Triyulianti ◽

Nuryani Widagti ◽

Suciadi Catur Nugroho ◽

Yuli Pancawati

Keyword(s):

Scleractinian Coral ◽

Gram Negative Bacteria ◽

Hard Coral ◽

Field Sampling ◽

Bacterial Isolation ◽

Gram Positive ◽

Coral Mucus ◽

Gram Negative ◽

Gram Positive Bacteria

Research on hard coral (Scleractinian coral) contaminated with bacteria is still not much done, especially in Indonesian waters. This study took samples of coral mucus in 2010 at 3 (three) different locations, namely Bunaken (May); Morotai (September) and Raja Ampat (November), which focused on the analysis of Research on hard coral (Scleractinian coral) contaminated with bacteria is still not much done, especially in Indonesian waters. This study took samples of coral mucus in 2010 at 3 (three) different locations, namely Bunaken (May); Morotai (September) and Raja Ampat (November), which focused on the analysis of gram-positive and gram-negative bacteria. The method used for field sampling is time swim, which is by diving at a depth of 5-10 meters for ± 30 minutes and randomly taking samples of coral mucus using siring or by taking directly on corals (reef branching). Mucus samples were analyzed by bacterial isolation in the laboratory. The result shows that there were differences between gram-positive and gram-negative bacteria in the three research sites and that gram-positive bacteria were higher or dominant. Further research that can identify the bacteria species and explain its relationship to the ecosystem is highly recommended.Keywords: Bacteria, Scleractinian coral, gram-positive and -negative, Bunaken, Morotai, Raja Ampat AbstrakPenelitian tentang karang keras (Scleractinian coral) yang terkontaminasi bakteri masih belum banyak dilakukan, terutama di perairan Indonesia. Penelitian ini mengambil sampel mucus karang pada tahun 2010 di 3 (tiga) lokasi berbeda, yakni Bunaken (Mei); Morotai (September) dan Raja Ampat (November), yang difokuskan pada analisis bakteri gram postif dan gram negatif. Metode yang digunakan untuk pengambilan sampel di lapangan adalah time swim, yaitu dengan penyelaman pada kedalaman 5-10 meter selama ±30 menit dan mengambil sampel mucus karang secara acak menggunakan siring atau dengan mengambil langsung pada karang (fraksi cabang). Sampel mucus dianalisis dengan cara isolasi bakteri di laboratorium. Hasil analisis menunjukkan bahwa ada perbedaan antara bakteri gram positif dan gram negative di tiga lokasi survei dan bakteri gram positif lebih tinggi atau dominan. Penelitian lebih lanjut yang dapat menentukan jenis bakteri serta menjelaskan hubungannya dengan ekosistem sangat disarankan untuk dilakukan.Kata Kunci : Bakteri, Scleractinian coral, gram positif dan negatif, Bunaken, Morotai, Raja Ampat

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Interspecific interactions among species of the coral genus Porites from Okinawa, Japan

Zoology ◽

10.1078/0944-2006-00014 ◽

2001 ◽

Vol 104 (2) ◽

pp. 91-97 ◽

Cited By ~ 12

Author(s):

Baruch Rinkevich ◽

Kazuhiko Sakai

Keyword(s):

Interspecific Interactions ◽

Coral Genus

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Chemical Diversity and Biological Activity of Secondary Metabolites from Soft Coral Genus Sinularia since 2013

Marine Drugs ◽

10.3390/md19060335 ◽

2021 ◽

Vol 19 (6) ◽

pp. 335

Author(s):

Xia Yan ◽

Jing Liu ◽

Xue Leng ◽

Han Ouyang

Keyword(s):

Biological Activity ◽

Secondary Metabolites ◽

Coral Species ◽

Soft Coral ◽

Biological Activities ◽

Vital Role ◽

Chemical Diversity ◽

Pharmacological Activities ◽

Lead Compounds ◽

Coral Genus

Sinularia is one of the conspicuous soft coral species widely distributed in the world’s oceans at a depth of about 12 m. Secondary metabolites from the genus Sinularia show great chemical diversity. More than 700 secondary metabolites have been reported to date, including terpenoids, norterpenoids, steroids/steroidal glycosides, and other types. They showed a broad range of potent biological activities. There were detailed reviews on the terpenoids from Sinularia in 2013, and now, it still plays a vital role in the innovation of lead compounds for drug development. The structures, names, and pharmacological activities of compounds isolated from the genus Sinularia from 2013 to March 2021 are summarized in this review.

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Impact of cyclones on hard coral and metapopulation structure, connectivity and genetic diversity of coral reef fish

Coral Reefs ◽

10.1007/s00338-021-02096-9 ◽

2021 ◽

Author(s):

Gabriele Gerlach ◽

Philipp Kraemer ◽

Peggy Weist ◽

Laura Eickelmann ◽

Michael J. Kingsford

Keyword(s):

Genetic Diversity ◽

Coral Reef ◽

Genetic Structure ◽

Reef Fish ◽

Coral Reef Fish ◽

Population Genetic Study ◽

Hard Coral ◽

Great Loss ◽

Metapopulation Structure ◽

The Impact

AbstractCyclones have one of the greatest effects on the biodiversity of coral reefs and the associated species. But it is unknown how stochastic alterations in habitat structure influence metapopulation structure, connectivity and genetic diversity. From 1993 to 2018, the reefs of the Capricorn Bunker Reef group in the southern part of the Great Barrier Reef were impacted by three tropical cyclones including cyclone Hamish (2009, category 5). This resulted in substantial loss of live habitat-forming coral and coral reef fish communities. Within 6–8 years after cyclones had devastated, live hard corals recovered by 50–60%. We show the relationship between hard coral cover and the abundance of the neon damselfish (Pomacentrus coelestis), the first fish colonizing destroyed reefs. We present the first long-term (2008–2015 years corresponding to 16–24 generations of P. coelestis) population genetic study to understand the impact of cyclones on the meta-population structure, connectivity and genetic diversity of the neon damselfish. After the cyclone, we observed the largest change in the genetic structure at reef populations compared to other years. Simultaneously, allelic richness of genetic microsatellite markers dropped indicating a great loss of genetic diversity, which increased again in subsequent years. Over years, metapopulation dynamics were characterized by high connectivity among fish populations associated with the Capricorn Bunker reefs (2200 km2); however, despite high exchange, genetic patchiness was observed with annual strong genetic divergence between populations among reefs. Some broad similarities in the genetic structure in 2015 could be explained by dispersal from a source reef and the related expansion of local populations. This study has shown that alternating cyclone-driven changes and subsequent recovery phases of coral habitat can greatly influence patterns of reef fish connectivity. The frequency of disturbances determines abundance of fish and genetic diversity within species.

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Composition and structure of tropical intertidal hard coral communities on natural and man-made habitats

Coral Reefs ◽

10.1007/s00338-021-02059-0 ◽

2021 ◽

Author(s):

Yen-ling Lee ◽

Samantha Qian Yi Lam ◽

Teresa Stephanie Tay ◽

Yuichi Preslie Kikuzawa ◽

Koh Siang Tan

Keyword(s):

Hard Coral ◽

Composition And Structure ◽

Coral Communities

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