Kinetics of strontium uptake in the scleractinian coral Stylophora pistillata

Ferrier‐Pagés, Christine; Boisson, Florence; Allemand, Denis; Tambutté, Éric

doi:10.3354/meps245093

Cited by 81 publications

(65 citation statements)

References 51 publications

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“…has been observed during El Niño-and La Niña -induced SSTAs on the Great Barrier Reef (McCulloch et al 1994, Marshall 2000, and it is yet unclear why this should occur. Cohen et al (2001Cohen et al ( , 2002 suggested that Sr/Ca ratios of coral skeleton accreted in the daytime may be influenced more by skeletal calcification rates than they are by SST, an hypothesis supported by recent experimental data (Ferrier-Pages et al 2003). If this is true, then the 1995-1996 Sr/Ca anomaly in the brain coral skeleton may reflect a decrease in coral calcification rate in response to the drop in water temperature associated with the unusually low NAOI.…”

Section: Sr/camentioning

confidence: 54%

How brain corals record climate: an integration of skeletal structure, growth and chemistry of Diploria labyrinthiformis from Bermuda

Cohen

Smith²,

McCartney³

et al. 2004

Mar. Ecol. Prog. Ser.

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The aragonite skeleton of massive reef-building corals contains a record of the oceanic environment in which they grow. However, reading of the record requires understanding of how it is archived, a process complicated by the elaborate skeletal construction and seasonal growth patterns that characterize many species. In this study, we assess the utility of the massive brain coral Diploria labyrinthiformis as an archive of sea surface temperature (SST) variability in the western North Atlantic. In situ staining of live colonies combined with microscale analysis of skeletal chemistry indicate that D. labyrinthiformis grows throughout the year on Bermuda and records the full annual cycle of SST variability. However, skeleton accreted during the summer is overlain (thickened) by skeleton accreted during the subsequent fall and winter. As a result, conventional coarse sampling for δ 18 O enables seasonal δ 18 O cycles to be resolved but these do not capture the full amplitude of the annual SST cycle. Our data show that the shallow gradient of the δ 18 O-SST regression equation derived for D. labyrinthiformis (-0.113 ‰ ºC -1 ) relative to the expected -0.22 ‰ ºC -1 for marine skeletons results from dampening of the summertime peak in δ 18 O. In contrast, skeleton accreted during the winter is not thickened and wintertime δ 18 O captures the interannual wintertime SST variability at this site. Using SIMS ion microprobe to analyse strontium to calcium ratios (Sr/Ca), we avoided the thickening deposits and were able to resolve the full amplitude of the annual Sr/Ca cycle. The Sr/Ca-SST relationship obtained for D. labyrinthiformis (-0.0843 mmol/mol ºC -1 ) corresponds to that derived from fast-growing tropical reef corals. X-ray intensity ratios, used as a proxy for skeletal density, reveal the expected seasonal changes associated with growth banding as well as variability on interannual and decadal timescales. These variations are well correlated with wintertime SST variability in the subtropical gyre and may be a valuable proxy thermometer for the North Atlantic.

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Section: Sr/camentioning

confidence: 54%

How brain corals record climate: an integration of skeletal structure, growth and chemistry of Diploria labyrinthiformis from Bermuda

Cohen

Smith²,

McCartney³

et al. 2004

Mar. Ecol. Prog. Ser.

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“…This result is novel for fish otoliths. Although other fields of research, such as coral calcification, have suggested that saturation of Sr:Ca in skeletal material does not occur (see Ferris-Pagès et al 2002), we have clearly shown that elemental saturation is reached in otoliths. Given the difference between coral and otolith elemental concentrations (Campana & Thorrold 2001), the discrepancies in partition coefficients (Martin et al 2004) and the results we present here on elemental uptake, we believe that comparisons of effects among different calcified structures are not justified.…”

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confidence: 86%

Section: Introductionmentioning

confidence: 99%

“…For Sr, a strong positive relationship exists between ambient and otolith concentrations. Although the relationship between the ambient elements and that of the calcified structure remains near linear for a large number of organisms (such as corals and foraminiferal shells, Lea & Spero 1992, Ferris-Pagès et al 2002, otoliths display elemental discrimination, due to environmental and biological factors affecting elemental incorporation (such as temperature, Bath et al 2000, Elsdon & Gillanders 2003b.Reconstructions of the environmental histories of fish using the elements in calcified structures have been based on fine-scale analysis, using either laser or micromilling techniques (e.g. Kafemann et al 2000), where peaks in the absolute elemental concentration are related to environmental variables (e.g.…”

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confidence: 99%

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Strontium incorporation into calcified structures: separating the effects of ambient water concentration and exposure time

Elsdon¹,

Gillanders²

2005

Mar. Ecol. Prog. Ser.

104

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Chemical elements within calcified structures of organisms such as fish, corals, bivalves, gastropods and foraminiferal shells can provide a record of the environmental characteristics at the time of calcification. To predict accurately the environmental characteristics at the time of calcification, it is important to understand the influence of exposure time on elemental incorporation. We examined the effect of enhanced ambient strontium:calcium (Sr:Ca) (2 × and 4 × ambient concentrations) and different periods of exposure (2, 4, 8, 16 and 32 d) on Sr:Ca uptake and incorporation into fish otoliths of the black bream Acanthopagrus butcheri (family: Sparidae). Sr:Ca ratios (hereafter referred to as concentrations) in bream otoliths increased with increasing ambient concentrations, with the amount of Sr:Ca incorporated into otoliths being positively affected by the period of exposure. Saturation of Sr:Ca in otoliths occurred after 20 d of exposure. Importantly, by measuring multiple variables of elemental uptake and incorporation, the relative effect of enhanced concentration and exposure time can be separated, which to date has not been possible. This research will allow for greater accuracy when interpreting environmental histories of fish. KEY WORDS: Trace element · Strontium · Laser ablation ICP-MS · Uptake · Exposure · Transects · Migration Resale or republication not permitted without written consent of the publisherMar Ecol Prog Ser 285: [233][234][235][236][237][238][239][240][241][242][243] 2005 result in instantaneous changes in elements within calcified structures. Consequently, the rate at which elements are incorporated into calcified structures would affect the interpretation of environmental histories, both spatially and temporally.The time required for elements to be incorporated into calcified structures is largely unknown, although there have been several attempts to examine the effect of exposure time to enhanced elemental concentrations on the uptake and incorporation of elements in fish otoliths, spines and vertebrae (Snyder et al. 1992, Ennevor & Beames 1993, Brown & Harris 1995, Pollard et al. 1999). Due to technical constraints, all of these experiments analysed whole calcified structures using solution-based techniques (e.g. whole otolith), and, in doing so, the derived elemental signatures were a mixture over the entire chronology of the structure. As reconstructions of environmental histories require high resolution of elemental concentrations, sample analysis requires the use of fine-scale micromilling or laser instruments (Elsdon & Gillanders 2003a). Nevertheless, experiments using solution-based techniques have shown that an increased period of exposure to environmental variables results in enhanced concentrations of elements being incorporated into calcified structures of fish (e.g. Pollard et al. 1999). Further experiments using more modern sample analysis are needed to assess the effects of exposure time on elemental incorporation; these experiments will provide more ...

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“…Therefore the growth rate related Sr incorporation mechanism has to be principally biological, either on the mineralization front or during ion transport from the surrounding medium into the extrapallial fluid [Klein et al, 1996]. Metabolic models of Sr incorporation suggest that Sr/Ca should be inversely related to growth rate, as seen in corals [Cohen et al, 2001;Ferrier-Pages et al, 2002;Cohen and McConnaughey, 2003]. …”

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confidence: 99%

Strontium to calcium ratios in the marine gastropod Conus ermineus: Growth rate effects and temperature calibration

Sosdian

Gentry

Lear

et al. 2006

Geochem Geophys Geosyst

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[1] Here we investigate the potential of Sr/Ca ratios in the marine gastropod Conus ermineus for reconstructing seawater temperatures. We present annually resolved records of Sr/Ca and d18 O for four shells collected alive from the Flower Garden Banks National Marine Sanctuary in the Gulf of Mexico. Our results show that variations in Sr/Ca and d18 O covary with the in situ seasonal temperature cycle. Sr/ Ca and temperature are positively correlated, in contrast with the inverse relationship found in inorganically precipitated aragonite. The seasonal Sr/Ca variability is superimposed on a long-term trend of increasing Sr/Ca with age. Both the seasonal and long-term ontogenetic changes in Sr/Ca are associated with variations in growth rate, defined here as the shell linear extension rate (LER); the seasonal variability in LER is superimposed on a long-term decrease with ontogeny. Thus the covariance of Sr/Ca ratios with temperature and LER suggests that Sr incorporation is likely driven by temperature influence on growth rate, rather than by thermodynamic effects. Unlike the seasonal variability, the ontogenetic effect is characterized by inverse covariation between Sr/Ca and LER, suggesting that Sr/Ca variability is not controlled by growth rate alone, but probably by two different biomineralization mechanisms, one related to temperature and the other related to age. We use the seasonal Sr/Ca signal of four shells to construct a temperature calibration. To minimize the ontogenetic effects, we separate the records into juvenile and adult growth stages and calculate the Sr/Ca-temperature (T) relationships: Juvenile: Sr/Ca (mmol mol the seasonal estimates reflects the high variability among specimens. To reduce the uncertainty on seasonal temperatures, we propose combining records from multiple shells to generate an average temperature record. The potential of this approach needs, however, to be validated in other locations.

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Kinetics of strontium uptake in the scleractinian coral Stylophora pistillata

Cited by 81 publications

References 51 publications

How brain corals record climate: an integration of skeletal structure, growth and chemistry of Diploria labyrinthiformis from Bermuda

How brain corals record climate: an integration of skeletal structure, growth and chemistry of Diploria labyrinthiformis from Bermuda

Strontium incorporation into calcified structures: separating the effects of ambient water concentration and exposure time

Strontium to calcium ratios in the marine gastropod Conus ermineus: Growth rate effects and temperature calibration

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