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7 results for “Pocillopora verrucosa”
MCR LTER: Coral Reef: Conspecific aggregation mitigation of OA on calcification of the coral Pocillopora verrucosa, JEXBIO 2017
The study was conducted in April 2015 in Moorea, French Polynesia, using colonies of Pocillopora verrucosa (~ 4 cm in planar diameter) collected from the outer reef of the north shore at 10–12 m depth. Corals were collected from multiple sites separated by 100-200 m on the outer reef to maximize the likelihood that the selected coral colonies were genetically unique, and transferred directly to an acclimation tank. The experiment used a sequential design, in which corals first were incubated under 130 ambient or elevated pCO2 in flow-through tanks, and then were incubated in a recirculating flume under the same pCO2 crossed with a contrast of two colony densities (Fig. S1). Two response variables were measured in the light (calcification and net photosynthesis at a single irradiance), two response variables were measured in the dark (aerobic respiration and calcification), and two response variables were calculated from these values (gross 135 photosynthesis, and calcification integrated over 24 h). Aerobic respiration was measured as oxygen uptake, and net photosynthesis was measured as the flux of oxygen at a constant irradiance, and in both cases, oxygen uptake was given a negative notation and oxygen evolution a positive notation; gross photosynthesis was obtained by subtracting respiration from net photosynthesis. Daily calcification was calculated by integrating calcification in the 140 light over 12 h, calcification in the dark over 12 h, and summing the two values assuming each day consisted of 12 h of light at a constant intensity. The six response variables were measured for aggregates of a fixed number (n = 12) of similar-sized colonies placed in the flume in either high or low density arrays. With this design, it was not possible to measure the physiology of individual colonies in each aggregate, and therefore our results describe the 145 performance corals averaged across each aggregate. These data support the publication Evensen & Edmunds, 'Conspecific
Data from: Assessing the effects of iron enrichment across holobiont compartments reveals reduced microbial nitrogen fixation in the Red Sea coral Pocillopora verrucosa
The productivity of coral reefs in oligotrophic tropical waters is sustained by an efficient uptake and recycling of nutrients. In reef-building corals, the engineers of these ecosystems, this nutrient recycling is facilitated by a constant exchange of nutrients between the animal host and endosymbiotic photosynthetic dinoflagellates (zooxanthellae), bacteria, and other microbes. Due to the complex interactions in this so-called coral holobiont, it has proven difficult to understand the environmental limitations of productivity in corals. Among others, the micronutrient iron has been proposed to limit primary productivity due to its essential role in photosynthesis and bacterial processes. Here, we tested the effect of iron enrichment on the physiology of the coral Pocillopora verrucosa from the central Red Sea during a 12-day experiment. Contrary to previous reports, we did not see an increase in zooxanthellae population density or gross photosynthesis. Conversely, respiration rates were significantly increased, and microbial nitrogen fixation was significantly decreased. Taken together, our data suggest that iron is not a limiting factor of primary productivity in Red Sea corals. Rather, increased metabolic demands in response to iron enrichment, as evidenced by increased respiration rates, may reduce carbon (i.e., energy) availability in the coral holobiont, resulting in reduced microbial nitrogen fixation. This decrease in nitrogen supply in turn may exacerbate the limitation of other nutrients, creating a negative feedback loop. Thereby, our results highlight that the effects of iron enrichment appear to be strongly dependent on local environmental conditions and ultimately may depend on the availability of other nutrients.
Data from: Dominance of Endozoicomonas bacteria throughout coral bleaching and mortality suggests structural inflexibility of the Pocillopora verrucosa microbiome
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Data from: Molecular assessment of Pocillopora verrucosa (Scleractinia; Pocilloporidae) distribution along a depth gradient in Ludao, Taiwan
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Data from: Assessing the effects of iron enrichment across holobiont compartments reveals reduced microbial nitrogen fixation in the Red Sea coral Pocillopora verrucosa
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Figure 11. Pocillopora verrucosa. A in With eyes wide open: a revision of species within and closely related to the Pocillopora damicornis species complex (Scleractinia; Pocilloporidae) using morphology and genetics
Figure 11. Pocillopora verrucosa. A, in situ appearance. B, skeleton of specimen. C and D, scanning electron micrographs of specimen (photos: Paul Muir). E, corallum of elongate 'damicornis-like' morph. F, colony at reef slope at Orpheus Island. G, corallum of holotype of Pocillopora danae (photo: Vaughan, 1918). H, corallum of holotype of Pocillopora hemprichii (side view). I, corallum collected at Lizard Island (side view) (MTQ-G66144).
Figure 10. Pocillopora verrucosa. A in With eyes wide open: a revision of species within and closely related to the Pocillopora damicornis species complex (Scleractinia; Pocilloporidae) using morphology and genetics
Figure 10. Pocillopora verrucosa. A, in situ. B, skeleton of branch. C and D, scanning electron micrographs (photos: Paul Muir). E, Madrepora damicornis Esper, 1791. F, specimen identified by Ehrenberg (1834) as P. verrucosa. G, sorallum of neotype (side view). H and I, scanning electron micrographs of neotype (MTQ-G65923).
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OpenNeuro
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