Life History and Stress Response of Scleractinian Corals

Hidaka, Michio

doi:10.1007/978-4-431-54364-0_1

Cited by 11 publications

(8 citation statements)

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“…Therefore, it is difficult to conclude that there is any relationship between acquisitions of repair genes and losses of MAA biosynthetic genes. On the other hand, diverse MAAs have been detected in coral tissues [ 27 , 70 ] and in shallow-water bivalves [ 40 ], so adaptation to UV radiation may depend largely on symbioses with MAA-producing or -using hosts [ 40 , 71 ]. For example, a report about Symbiodinium evolution and bivalve symbiosis suggests that the Symbiodinium in the bivalve, Fragum , might be a shade-loving alga [ 72 ].…”

Section: Discussionmentioning

confidence: 99%

Two divergent Symbiodinium genomes reveal conservation of a gene cluster for sunscreen biosynthesis and recently lost genes

et al. 2018

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BackgroundThe marine dinoflagellate, Symbiodinium, is a well-known photosynthetic partner for coral and other diverse, non-photosynthetic hosts in subtropical and tropical shallows, where it comprises an essential component of marine ecosystems. Using molecular phylogenetics, the genus Symbiodinium has been classified into nine major clades, A-I, and one of the reported differences among phenotypes is their capacity to synthesize mycosporine-like amino acids (MAAs), which absorb UV radiation. However, the genetic basis for this difference in synthetic capacity is unknown. To understand genetics underlying Symbiodinium diversity, we report two draft genomes, one from clade A, presumed to have been the earliest branching clade, and the other from clade C, in the terminal branch.ResultsThe nuclear genome of Symbiodinium clade A (SymA) has more gene families than that of clade C, with larger numbers of organelle-related genes, including mitochondrial transcription terminal factor (mTERF) and Rubisco. While clade C (SymC) has fewer gene families, it displays specific expansions of repeat domain-containing genes, such as leucine-rich repeats (LRRs) and retrovirus-related dUTPases. Interestingly, the SymA genome encodes a gene cluster for MAA biosynthesis, potentially transferred from an endosymbiotic red alga (probably of bacterial origin), while SymC has completely lost these genes.ConclusionsOur analysis demonstrates that SymC appears to have evolved by losing gene families, such as the MAA biosynthesis gene cluster. In contrast to the conservation of genes related to photosynthetic ability, the terminal clade has suffered more gene family losses than other clades, suggesting a possible adaptation to symbiosis. Overall, this study implies that Symbiodinium ecology drives acquisition and loss of gene families.Electronic supplementary materialThe online version of this article (10.1186/s12864-018-4857-9) contains supplementary material, which is available to authorized users.

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Section: Discussionmentioning

confidence: 99%

Two divergent Symbiodinium genomes reveal conservation of a gene cluster for sunscreen biosynthesis and recently lost genes

et al. 2018

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“…Coral reefs are one of the oldest reef systems on earth (Pandolfi,2011). Hidaka (2016) stated that coral reefs comprise a symbiotic system that coexists among coral algae, ecosystems, landforms, and humans at various levels. As a marine ecosystem, coral reefs are very vulnerable to degradation (Pratchett et al, 2013;Vo et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Bioecology of coral reef in Panjang Island of Central Java Indonesia

et al. 2021

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Coral reefs currently are suffered from natural factors along with increasing anthropogenic activity. Panjang Island, a small reef island located in Jepara Regency, may also be experiencing such conditions. Therefore, this work was aimed to observe the condition of the coral cover of Panjang Island. Line intercept transect was applied to survey the coral cover and mortality index from fourteen stations. Insitu data consisted of the bottom substrate composition of the reefs and the physical parameters of the sea. The secondary data, i.e. coral reef area maps from 2001 to 2019 were taken from Landsat Image 7 and 8, data of wind were obtained from www.ogimet.com, while tidal data were collected from BMKG. The bathymetry was determined from the Geospatial Information Agency data, salinity global analysis forecast Phy 001.024 (CMEMS). Sea surface temperature (SST), and chlorophyll-a distribution were analyzed using ENVI software. The result showed that Panjang Island has a poor to the moderate condition of hard coral. Two out of six categories of abiotic and dead coral were found to be high. The mortality index of coral was in the high category (average 0.52). During research periods the sea waters were characterized by high sea surface temperature (29.34-30.94°C), chlorophyll-a was also tended to be high (0-2.65 mg.m-3), and an average of salinity was high 32 ‰. The weak currents came to all sides of the island, therefore the coral reef was not exposed to extreme currents. The waves came from the east, then the energy decreases after being blocked by coral reefs on the eastern side of the island, so that coral reefs in the northeast and south sides were safer to be exposed. The results suggest that hydrodynamic ecology directly or indirectly affected the percentage of coral cover and mortality index at the reefs of Panjang Island.

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“…Coral bleaching is a more complex process than mechanical breakage and is most commonly triggered by a combination of high temperature and radiation, and low water current (Brown , Hidaka ). The latter conditions simultaneously increase the demand in CO 2 of the zooxanthellae and reduce the external supply of dissolved inorganic carbon (i.e., CO 2 and HCO 3− ; Wooldridge ).…”

Section: Review Of Functional Traits and Associated Assumptionsmentioning

confidence: 99%

“…). To protect itself, the host expels its symbiont, but risks dying from nutrient deficiency when bleaching lasts too long (Hidaka ). The bleaching response varies considerably among species (McClanahan , Swain et al.…”

Section: Review Of Functional Traits and Associated Assumptionsmentioning

confidence: 99%

“…), which precludes the merging of different datasets. Second, coral species show different degrees of symbiotic fidelity and we have limited understanding of the functional consequences of these unique associations (Hidaka ). Third, a single colony can show a high rate of symbiotic turnover because of seasonality (Hume et al.…”

Section: Review Of Functional Traits and Associated Assumptionsmentioning

confidence: 99%

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A modified trait‐based framework for assessing the resilience of ecosystem services provided by coral reef communities

2018

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Citation: Carturan, B. S., L. Parrott, and J. Pither. 2018. A modified trait-based framework for assessing the resilience of ecosystem services provided by coral reef communities. Ecosphere 9(5):e02214. 10.1002/ecs2.2214Abstract. Climate change and other anthropogenic disturbances are having dramatic impacts on tropical coral reefs and the ecosystem services they provide. Anticipating change in ecosystem services is a pressing challenge that requires understanding how species respond to an environmental change, and how they contribute to ecosystem services. Building on analogous efforts by plant ecologists, we propose a traitbased framework that aims to predict the resistance and recovery of coral ecosystem services against both pulse and press disturbances. The framework involves identifying effect, resistance, and recovery traits across coral species and using these to ascertain how species might (1) contribute to a service, (2) resist disturbance, and (3) recover after the disturbance. By identifying trait functional overlaps and quantifying correlations among the trait types, the framework can yield a better understanding of the potential mechanistic links between community assembly, ecosystem dynamics, and ecosystem functioning. We demonstrate the utility of the framework by applying it to a virtual scenario, implemented via simulation, in which habitat provisioning is the focal ecosystem service, and cyclones and bleaching events are the disturbances of interest. This demonstration required us to assemble an extensive dataset of relevant traits-a process that revealed key gaps in the coral trait database and in our understanding of coral functional ecology. The framework can provide predictive power for the resilience of ecosystem services and can also help identify crucial knowledge gaps, research objectives, and strategies for applying a trait-based approach to advancing coral reef science and conservation.

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Life History and Stress Response of Scleractinian Corals

Cited by 11 publications

References 148 publications

Two divergent Symbiodinium genomes reveal conservation of a gene cluster for sunscreen biosynthesis and recently lost genes

Two divergent Symbiodinium genomes reveal conservation of a gene cluster for sunscreen biosynthesis and recently lost genes

Bioecology of coral reef in Panjang Island of Central Java Indonesia

A modified trait‐based framework for assessing the resilience of ecosystem services provided by coral reef communities

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