Phosphate Enrichment Hampers Development of Juvenile Acropora digitifera Coral by Inhibiting Skeleton Formation

Iijima, Mariko; Yasumoto, Ko; Yasumoto, Jun; Yasumoto-Hirose, Mina; Kuniya, Nami; Takeuchi, Ryota; Nozaki, Masashi; Nanba, Nobuyoshi; Nakamura, Takashi; Jimbo, Mitsuru; Watabe, Shugo

doi:10.1007/s10126-019-09880-3

Cited by 9 publications

(8 citation statements)

References 48 publications

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“…It has also been reported that higher phosphate concentrations result in unusual skeleton structures and decreased skeleton density of Acropora spp. due to inhibition of normal crystal formation [13,27]. Our results confirm these reports.…”

Section: Resultssupporting

confidence: 92%

“…Open Sci. 8: 201214 cultivated with seawater containing over 5 µM phosphate mentioned above [13]. Although the other pollutants could also be released from the calcareous sediment, the characteristic inhibition of the juvenile coral skeletons led us to conclude that the skeleton inhibitions by the sediments were due to phosphate.…”

Section: Resultsmentioning

confidence: 87%

“…For the coral rearing experiments (see below), samples of sieved sediment from the 0.5–1 mm particle size fraction were spread on Petri dishes and topped with 25 ml of filtered oligotrophic natural seawater collected from the ocean surface off the coast of Ogasawara Islands (filter pore size, 0.2 µm; nitrate, less than 0.35 µM; phosphate, less than 0.096 µM [ 13 ]). This oligotrophic seawater was replaced in the Petri dishes every 2 days.…”

Section: Methodsmentioning

confidence: 99%

“…However, the processes through which DIN and DIP overload can harm corals are poorly understood: suggestions include both direct (e.g. inhibition of coral calcification [ 13 ] and larval settlement [ 1 ]) and indirect (e.g. proliferation of macroalgae [ 14 ], more frequent outbreaks of crown-of-thorns starfish deleterious effects [ 15 ]).…”

Section: Introductionmentioning

confidence: 99%

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Phosphate bound to calcareous sediments hampers skeletal development of juvenile coral

et al. 2021

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To test the hypothesis that terrestrial runoff affects the functions of calcareous sediments in coral reefs and hampers the development of corals, we analysed calcareous sediments with different levels of bound phosphate, collected from reef areas of Okinawajima, Japan. We confirmed that phosphate bound to calcareous sediments was readily released into ambient seawater, resulting in much higher concentrations of phosphorous in seawater from heavily polluted areas (4.3–19.0 µM as compared with less than 0.096 µM in natural ambient seawater). Additionally, we examined the effect of phosphate released from calcareous sediments on the development of Acropora digitifera coral juveniles. We found that high phosphate concentrations in seawater clearly inhibit the skeletal formation of coral juveniles. Our results demonstrate that calcareous sediments in reef areas play a crucial role in mediating the impact of terrestrial runoff on corals by storing and releasing phosphate in seawater.

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Section: Resultssupporting

confidence: 92%

Section: Resultsmentioning

confidence: 87%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Phosphate bound to calcareous sediments hampers skeletal development of juvenile coral

et al. 2021

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“…Eutrophication is a state of an aquatic ecosystem exposed to an increase in nutrient concentrations from point and non-point sources, leading to increased phytoplankton and algal biomass in the water column, and causing decreased levels of dissolved oxygen in water, which all can lead to deterioration of water quality and negatively impacts the ecosystem functioning in general, and coral reefs in particular [19][20][21][22]. The eutrophication status of two artificial lagoons, Royal Yacht Club (RYC) and Tala Bay (TB), in the GoA (Figure 1b) has been discussed by Rasheed et al [18].…”

Section: Introductionmentioning

confidence: 99%

Chlorophyll–Nutrient Relationships of an Artificial Inland Lagoon Equipped with Seawater Replenishment System in the Northern Red Sea (Gulf of Aqaba)

Al-Rshaidat

Segonds‐Pichon

Salem³

2020

JMSE

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Data are reported for an inland artificial lagoon (Ayla) to evaluate the impact of the lagoon’s modeled design and water replenishment system on its water quality and the coastal ecosystem. This study focused on Ayla’s upper lagoon (UL) only, due to its isolation from the two other lagoons and the ambient seawater in the Gulf of Aqaba (GoA). Nutrient measurements (nitrite, nitrate, ammonium, phosphate, and silicate) in addition to Chlorophyll a (Chl a) data were collected between July 2012 and June 2013. Chl a values in the UL were not significantly different from ambient seawater in the GoA, and the UL did not show seasonal differences (p = 0.456). Significant variability for nitrite was observed in the UL between spring and summer (p < 0.0001) and between fall and winter (p < 0.0001). Nitrite showed a stronger seasonal effect in the GoA seawater than in the UL (p = 0.056). Phosphorus showed a seasonal effect and remained similar between the UL and GoA. Nutrient stoichiometry showed a Redfield-like nitrogen-to-phosphorus (N:P) ratio for the ambient GoA seawater around the inlet pumping source and an increased N:P ratio inside the UL. This study emphasizes the importance of modeled lagoon design and seawater replenishment system in preventing and inhibiting eutrophication of the lagoon and therefore minimizing contamination in the coastal ecosystem.

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Visualisation of Phosphate in Subcalicoblastic Extracellular Calcifying Medium and on a Skeleton of Coral by Using a Novel Probe, Fluorescein-4-Isothiocyanate-Labelled Alendronic Acid

et al. 2022

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Phosphate Enrichment Hampers Development of Juvenile Acropora digitifera Coral by Inhibiting Skeleton Formation

Cited by 9 publications

References 48 publications

Phosphate bound to calcareous sediments hampers skeletal development of juvenile coral

Phosphate bound to calcareous sediments hampers skeletal development of juvenile coral

Chlorophyll–Nutrient Relationships of an Artificial Inland Lagoon Equipped with Seawater Replenishment System in the Northern Red Sea (Gulf of Aqaba)

Visualisation of Phosphate in Subcalicoblastic Extracellular Calcifying Medium and on a Skeleton of Coral by Using a Novel Probe, Fluorescein-4-Isothiocyanate-Labelled Alendronic Acid

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