Coral Diversity at Losin Pinnacle, an Offshore Reef in the Gulf of Thailand: Toward a Future MPA

Yucharoen, Mathinee; Chankong, Anchalee; Phongsuwan, Niphon; Ninwat, Santi; Darumas, Udomsak; Thongkao, Suthira; Phasombun, Supaporn

doi:10.3389/fmars.2020.00130

Cited by 3 publications

(1 citation statement)

References 32 publications

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“…Therefore, coral communities in this particular area, such as Porites lutea, Turbinaria spp., Platygyra spp., and Acropora spp., are the most stress-resistant corals (Morgan et al, 2017;Ng & Ang, 2016). Similar to other reefs, coral populations in Thai waters revealed a decrease in coral cover after severe bleaching events (1998 and 2010) (Chavanich et al, 2009;Yucharoen et al, 2020). Therefore, certain management tools and strategies can be employed to enhance coral reef resilience and reduce the decline in coral reefs (Omori, 2019).…”

Section: Status Of Coral Reefmentioning

confidence: 99%

Variation of symbiodiniaceae in broadcaster acropora humilis and brooder pocillopora damicornis corals

Jandang¹

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Reef-building corals sustain a symbiotic relationship with single-cell algae belonging to family Symbiodiniaceae. Symbiotic algae contribute up to 50-95% of the metabolic needs by supplying photosynthetic products to the coral host. Therefore, the symbiosis between corals and Symbiodiniaceae is essential for the development and survival of coral reefs. Over the past years, significant losses and changes in coral reef ecosystems have been caused by anthropogenic activities and natural phenomena. Thus, relevant national organizations have raised awareness regarding the conservation of coral populations. Our Reef Biology Research Group, Department of Marine Science, Chulalongkorn University have been producing corals using a sexual propagation technique for coral reef rehabilitation since 2003. Nevertheless, studies on coral background, including their biology and adaptation mechanism, are required for policy and/or action plan of coral reef management and conservation. This study consisted of three experiments that aimed to collect the related information on corals, especially coral spawning, and investigate the diversity of Symbiodiniaceae in corals from the upper GoT. Two Acropora species spawn their gametes around 8 PM to 9 PM across all lunar periods with no clear indication of lunar-associated cue. According to year data, asynchronous spawning occurs and may lead to the low success of fertilization and the decreased number of coral recruitments (Experiment 1). A. humilis and P. damicornis exhibited the shuffling and switching of Symbiodiniaceae community under hatchery conditions. However, we recorded the association of Symbiodiniaceae genus Symbiodininium with coral, which has never been reported before in Thailand (Experiment 2). Tagged colonies of wild Acropora and Pocillopora corals showed a significant decline in zooxanthellae cells during summer, but the community of Symbiodiniaceae exhibited no change throughout the year (Experiment 3). The results from this study are useful for understanding the coral life cycle and coral-Symbiodiniaceae relationship, which can be applied to the prediction of potential adaptation of corals in localized reef environments and improve coral cultivation and conservation in Thailand.

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Section: Status Of Coral Reefmentioning

confidence: 99%

Variation of symbiodiniaceae in broadcaster acropora humilis and brooder pocillopora damicornis corals

Jandang¹

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An Overview of the Indian Ocean Coral Ecosystems

Chanda

2022

Blue Carbon Dynamics of the Indian Ocean

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Biogeographic and environmental drivers of reef fish diversity in coastal islands of the Gulf of Thailand

Mattos,

Yeemin,

Sutthacheep

et al. 2023

Mar. Ecol. Prog. Ser.

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Islands, critical environments for marine biodiversity, have endorsed several classical ecological theories. However, most studies on marine communities in islands are restricted to oceanic settings; whether premises of island biogeography apply to coastal islands is still unknown. In the Gulf of Thailand (GoT), coral reefs occur in nearshore coastal islands, subject to a wide range of environmental conditions, diverging from the most-studied oceanic counterparts. We investigated fish communities of 51 reefs at 10 sites spanning ~1500 km of the GoT coast, to answer whether diversity and species composition were (1) more influenced by area and isolation than by local environmental conditions and/or (2) affected by the geographical position. As predicted by island biogeography models, diversity decreased with island isolation, albeit only for rare species; reef area increased diversity but solely for common and dominant species. The effect of the geographical position of reefs within the GoT was negligible. Small-scale differences in local conditions of turbidity and depth affected diversity and composition more than isolation and SST. Within-island variability in these conditions yielded a high local turnover of species, enhancing within-site gamma richness, even when the mean alpha richness per site was low. Trophic group composition was similar among most sites, but extreme conditions of environmental constraints (e.g. very high/low turbidity) rendered changes in the dominant trophic group. Results suggest that island biogeography models apply to the reef fish communities in coastal islands to some extent, but the broader ranges of local conditions are the primary drivers of their diversity and composition.

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Coral Diversity at Losin Pinnacle, an Offshore Reef in the Gulf of Thailand: Toward a Future MPA

Cited by 3 publications

References 32 publications

Variation of symbiodiniaceae in broadcaster acropora humilis and brooder pocillopora damicornis corals

Variation of symbiodiniaceae in broadcaster acropora humilis and brooder pocillopora damicornis corals

An Overview of the Indian Ocean Coral Ecosystems

Biogeographic and environmental drivers of reef fish diversity in coastal islands of the Gulf of Thailand

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