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281 results for “Acropora”
Fig. 4 in An annotated and illustrated checklist of species of the coral genus Acropora (Cnidaria: Scleractinia) from Vamizi Island, Mozambique
Fig. 4. Acropora austera. Specimen number: (A, B, E) VAM39; (C, D) VAM13. (A) live colony; (B) branch detail; (C) portion of colony; (D) radial corallites and (E) axial corallite; (F) coenosteum between corallites.
Fig. 3 in An annotated and illustrated checklist of species of the coral genus Acropora (Cnidaria: Scleractinia) from Vamizi Island, Mozambique
Fig. 3. Acropora cf. appressa. Specimen number: VAM68. (A) live colony; (B) branch detail; (C) radial corallites; (D) axial corallite; (E) coenosteum between corallites.
Fig. 9 in An annotated and illustrated checklist of species of the coral genus Acropora (Cnidaria: Scleractinia) from Vamizi Island, Mozambique
Fig. 9. Acropora digitifera. Specimen number: VAM29. (A) live colony; (B) branch fragment; (C) radial corallites; (D) branch fragment; (E) axial corallite; (F) coenosteum between corallites.
Fig. 10 in An annotated and illustrated checklist of species of the coral genus Acropora (Cnidaria: Scleractinia) from Vamizi Island, Mozambique
Fig. 10. Acropora divaricata. Specimen number: VAM40. (A) live colony; (B) branch fragment; (C) radial corallites and (D) axial corallite; (E) coenosteum between corallites.
Fig. 12 in An annotated and illustrated checklist of species of the coral genus Acropora (Cnidaria: Scleractinia) from Vamizi Island, Mozambique
Fig. 12. Acropora cf. forskali. (A) live colony (B) branch fragment; (C) axial corallite; (D) radial corallites; (E) coenosteum between corallites.
Fig. 8 in An annotated and illustrated checklist of species of the coral genus Acropora (Cnidaria: Scleractinia) from Vamizi Island, Mozambique
Fig. 8. Acropora clathrata. Specimen number: (A, C–E) VAM20; (B) VAM26. (A) live colony; (B) plate surface; (C) branch fragment; (D) radial corallites; (E) coenosteum between corallites.
Fig. 11 in An annotated and illustrated checklist of species of the coral genus Acropora (Cnidaria: Scleractinia) from Vamizi Island, Mozambique
Fig. 11. Acropora cf. florida. Specimen number: VAM65. (A) live colony; (B) branch fragment; (C) axial corallite; (D) coenosteum between corallites.
Larval dispersal patterns and connectivity of Acropora on Florida’s Coral Reef and its implications for restoration
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Population connectivity and genetic offset in the spawning coral Acropora digitifera in Western Australia
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MCR LTER: Coral Reef: Community Dynamics: Physical Characteristics of Branching Acropora Patches and Species Richness and Abundances of Associated Fishes
Branching corals, like many in the genus Acropora, provide structurally complex habitats for reef fishes and other organisms. Fluctuations in the abundance, distribution and characteristics of staghorn Acroporid corals may contribute to changes in the abundance and species composition of reef fishes due to changes in the availability of shelter habitat and food. Farming damselfishes of the genus Stegastes occur in high abundances in staghorn thickets and actively defend food and nest space against organisms that threaten these resources. Here I examine the value of staghorn thickets as habitat for fishes, and how the presence of territorial farming damselfishes may influence the assemblage of fishes that associate with staghorn corals. Surveys of 185 Acropora pulchra thickets located in the lagoons surrounding the island of Moorea, French Polynesia revealed 85 species of fish from 25 families. Total fish abundance and species richness values ranged from no fish on a thicket to a high of 275 individuals and 26 species. Thicket area was the most important characteristic in explaining variation in attributes of the fish assemblage among staghorn thickets, with other characteristics explaining little of the species composition or trophic structure. Behavioral observations revealed that farming damselfishes were most aggressive toward corallivores, herbivores, and egg predators, while they ignored most carnivores and omnivores. Despite this pattern, I observed positive covariance between Stegastes and the group of fishes that elicited the strongest aggressive response when the effect of thicket area was removed, suggesting these fishes remain drawn to the resources produced or enhanced by Stegastes on A. pulchra thickets.
Metadata: Microsatellite genotypes for Seriatopora hystrix and Acropora millepora in Indonesia
<p>Microsatellite genotypes for <em>Seriatopora hystrix</em> and <em>Acropora millepora</em> in Indonesia as used in the paper "Differences in genetic diversity and divergence between brooding and broadcast spawning corals across two spatial scales in the Coral Triangle region."</p>
Data from: Population genetic structure between Yap and Palau for the coral Acropora hyacinthus
Information on connectivity is becoming increasingly in demand as marine protected areas are being designed as an integral part of a network to protect marine resources at the ecosystem level. Larval dispersal and population structure, however, remain very difficult to assess. Here, we tested the predictions of a detailed oceanographic connectivity model of larval dispersal and coral recruitment within Palau and between Palau and Yap, which was developed to support the review of the existing network of marine protected areas in Palau. We used high throughput microsatellite genotyping of the coral Acropora hyacinthus to characterize population genetic structure. Pairwise F′ST values between Palau and Yap (0.10), Palau and Ngulu (0.09) and Yap and Ngulu (0.09) were all significant and similar to pairwise F′ST values of sites within Palau (0.02–0.12) and within Yap (0.02–0.09) highlighting structure at island scale and indicating that recruitment may be even more localized than previously anticipated. A bottleneck test did not reveal any signs of a founder effect between Yap and Palau. Overall, the data supports the idea that recovery of A. hyacinthus in Palau did not come exclusively from a single source but most likely came from a combination of areas, including sites within Palau. In light of these results there seems to be very little connectivity around the barrier reef and management recommendation would be to increase the number or the size of MPAs within Palau.
Data from: Transcriptomic differences between day and night in Acropora millepora provide new insights into metabolite exchange and light-enhanced calcification in corals
The evolutionary success of reef-building corals is often attributed to their symbiotic relationship with photosynthetic dinoflagellates of the genus Symbiodinium, but metabolic interactions between the partners and the molecular bases of light-enhanced calcification (LEC) are not well understood. Here, the metabolic bases of the interaction between the coral Acropora millepora and its dinoflagellate symbiont were investigated by comparing gene expression levels under light and dark conditions at the whole transcriptome level. Among the 497 differentially expressed genes identified, a suite of genes involved in cholesterol transport was found to be upregulated under light conditions, confirming the significance of this compound in the coral symbiosis. Although ion transporters likely to have roles in calcification were not differentially expressed in this study, expression levels of many genes associated with skeletal organic matrix composition and organization were higher in light conditions. This implies that the rate of organic matrix synthesis is one factor limiting calcification at night. Thus, LEC during the day is likely to be a consequence of increases in both matrix synthesis and the supply of precursor molecules as a result of photosynthetic activity.
TagSeq gene expression data from Acropora cervicornis genotypes exhibiting above or below average heat tolerance
<p>TagSeq data taken from Acropora cervicornis genotypes taken from nurseries in the Florida Reef tract and subjected to thermal stress. </p>
Geochemical significance of Acropora death assemblages in the northern South China Sea: implications for environmental reconstruction using branching corals
<p>The datasets contain the Sr/Ca, Li/Mg, 𝛅<sup>11</sup>B, B/Ca, 𝛅<sup>13</sup>C and 𝛅<sup>18</sup>O determinations of the <em>Acropora</em> death assemblages collected off south Hainan Island in the northern South China Sea. </p>
Assisted sexual reproduction of Acropora cervicornis for active restoration on Florida's Coral Reef
<p class="MsoNormal">Given the rapid, global decline in the health and abundance of coral reefs, increased investments in restoration-based interventions – including asexual and sexual propagation – are being made by coral reef scientists at research institutions, but also at zoos and aquariums. Mote Marine Laboratory & Aquarium is an independent, non-profit marine science organization dedicated to the conservation and restoration of Florida's Coral Reef, and does so, using science-based strategies. In order to promote the long-term persistence, resilience, and adaptive potential of restored coral populations on Florida's Coral Reef, Mote scientists are performing critical research and restoration activities related to assisted sexual reproduction (ASR). The objective of this study was to optimize ASR of <em>Acropora</em> <em>cervicornis</em> by (1) evaluating broodstock compatibility for genets actively used within Mote's restoration gene pool, (2) optimizing larval settlement by testing spectral cues, (3) and optimizing the grow-out of sexual recruits by testing the impact of light on growth, survival, and algal symbiont uptake in the presence of adult corals or not. Overall, we found that corals and genets spawned with high synchrony, both within and across years, and in terms of predicted spawning times related to nights after the full moon and minutes after sunset. Across two years, overall fertilization success was high (~95%), but we did find one pair of genets that was not compatible. During settlement, larvae preferred pink and purple-colored substrates, which was consistent with our expectation that they would select substrates similar in color to crustose coralline algae (CCA). Interestingly though, they only did so when a matching chemical cue from CCA was also present, indicating that larvae integrate multiple cues simultaneously to determine the most appropriate place to settle. Growth and symbiont uptake were faster in recruits reared in the presence of adult corals and additional lighting, but survivorship was not different through the first ten weeks post-settlement between treatments. A subset of corals was outplanted using two different techniques based on single or clustered corals. We report the initial 1-month survival results. We also provide a detailed protocol and general recommendations for ASR based on years of coral sexual propagation experience.</p>
Algal symbiont diversity in Acropora muricata from the extreme reef of Bouraké associated with resistance to coral bleaching
<p>Widespread coral bleaching has generally been linked to high water temperatures at larger geographic scale. However, teh bleaching response can be highly variable aming individuals of the same species, between different species, and across localities; what causes this variability remais unresolved. Here, we tracked bleached and non-bleached colonies of <em>Acropora muricata </em>to see if they recovered or died following a stress event inside the semi-enclosed lagoon of Bouraké (New Caledonia), where corals are long-term acclimatized to extreme conditions of temperature, pH and dissolved oxygen, and at a nearby control reef. We describe Symbiodiniaceae community changes, metabolic responses, and energetical reserves (12 physiological traits evaluated) during La Niña warm and rainy summer in 2021. Widespread coral bleaching (score 1 and 2 on coral colour health chart) was observed only in Bouraké, likely due to the combination of the high temperatures (up to 32 <sup>o</sup>C) and heavy rain. All colonies (i.e., Bouraké and reference site) had <em>Cladocopium </em> as their main genera. Unbleached colonies in Bouraké had a specific ITS2-type profile (proxies for Symbiodiniaceae genotypes), while the bleached colonies in Bouraké had the same ITS2-type profile of control colonies during the stress event. After four months, teh few bleached colonies thata survived acquired the same ITS2 type profiles of the unbleached resistant colonies. In terms of physiological performances, all bleached corals showed metabolic depression (e.g., P<sub>gross </sub>and R<sub>dark</sub>). In contrast, unbleahed colonies in Bouraké maintained higher metabolic rates and energetic reserves compared to control corals. Our study suggests that <em>Acropora muricata</em> enhanced their resistance to bleaching thanks to specific Symbiodiniaceae, while energetic reserves may increase their resilience after stress. </p>
Environmental cues in coral reproduction: Photoperiod and seawater temperature influence oocyte development in <em>Acropora tenuis</em>
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Algal symbiont diversity in Acropora muricata from the extreme reef of Bouraké associated with resistance to coral bleaching
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Data from: The potential role of temperate Japanese regions as refugia for the coral Acropora hyacinthus in the face of climate change
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