Correlated trace element “vital effects” in tropical corals: A new geochemical tool for probing biomineralization

Sinclair, D. J.

doi:10.1016/j.gca.2005.02.030

Cited by 115 publications

(155 citation statements)

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“…As a result, many studies may have inadvertently discarded useful data under the presumption that the observed signal was nothing more than instrument noise or sample contamination. Sinclair (2005) showed that consistent temporal patterns can be found in LA-ICPMS data obtained from corals skeletons that are below the presumed DL. We show here that, in some conditions, chemical signals from otoliths may contain important information even when signals fall below standard definitions of DL.…”

Section: Ben-tzvi Et Almentioning

confidence: 61%

The inclusion of sub‐detection limit LA‐ICPMS data, in the analysis of otolith microchemistry, by use of a palindrome sequence analysis (PaSA)

Abelson

Gaines

Sheehy

et al. 2007

Limnology & Ocean Methods

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Fish otoliths are a reliable source of historical data regarding individual fish. Optical and chemical data obtained from otoliths are used to reveal the fish's age, natal areas, dispersal trajectories, and more. However, whereas optical methods are well established and widely practiced, methods for obtaining and interpreting chemical data continue to evolve. Despite rapid advances in the past decade, analytical approaches to otolith microchemisty continue to develop as new opportunities and limitations emerge. Otolith chemistry often reflects environmental conditions such as the chemical composition, temperature, and salinity of the ambient water. However, it is not always clear how these interact to produce the chemical signature observed in the otolith. Such gaps and inconsistencies in our knowledge may result partly from valuable information being discarded when measured concentrations fall below customarily defined detection limits (DL). Below we review some of the inaccuracies that may arise when analyzing chemical data obtained from laser-ablation inductively coupled mass spectrometry (LA-ICPMS). We argue that measurements traditionally defined as sub-DL can contain valuable information that would otherwise be discarded. We base our argument on the analysis of sub-DL signals obtained from both sides of otoliths core. Specifically, we show that these signals often form sequences that are symmetrical about the core (palindrome), and that the probability of obtaining even the simplest palindromic sequence by chance falls well below the customary 5% significance level. We conclude by discussing how this microchemical data can be analyzed in a manner that is insensitive to errors in concentration readings.

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Section: Ben-tzvi Et Almentioning

confidence: 61%

The inclusion of sub‐detection limit LA‐ICPMS data, in the analysis of otolith microchemistry, by use of a palindrome sequence analysis (PaSA)

Abelson

Gaines

Sheehy

et al. 2007

Limnology & Ocean Methods

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“…[24] Recent investigations of micron-scale variations in coral skeletal Sr/Ca concluded that micron-scale frequency variations in coral Sr/Ca are not related to SST variations [Meibom et al, 2003;Allison and Finch, 2004;Cohen and Sohn, 2004;Sinclair, 2005]. Meibom et al [2003] observed approximately monthly oscillations in coral Sr/Ca sampled at 30 mm (approximately daily), which they attributed to metabolic variability related to the lunar cycle.…”

Section: Sampling Resolutionmentioning

confidence: 99%

“…Allison and Finch [2004] observed significantly higher coral Sr/Ca values in the COCs, no significant difference in coral Sr/Ca between the fast and slow growing corals, and both the fasciculi and COCs exhibit large Sr/Ca heterogeneity ($1 mmol/mol) not related to temperature, which they attribute to variations in calcification rates. Sinclair [2005] microsampled Porites corals from the Great Barrier Reef, Australia and reported large-magnitude, submonthly coral Sr/Ca variability, which would equate to $20°C. Unlike Meibom et al [2003] and Cohen and Sohn [2004], Sinclair [2005] did not observe concentrations of variance at common periodicities and noted different variations between corals.…”

Section: Sampling Resolutionmentioning

confidence: 99%

“…Sinclair [2005] microsampled Porites corals from the Great Barrier Reef, Australia and reported large-magnitude, submonthly coral Sr/Ca variability, which would equate to $20°C. Unlike Meibom et al [2003] and Cohen and Sohn [2004], Sinclair [2005] did not observe concentrations of variance at common periodicities and noted different variations between corals. Previous coral-based climate reconstructions contrast with micron-scale investigations, which use micron-scale sampling to recover $1 mm 2 area from within a single corallite, whereas typical coral-based climate reconstructions sample an $1 mm 2 area which may contain multiple corallites depending on the species.…”

Section: Sampling Resolutionmentioning

confidence: 99%

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Reconstructing twentieth‐century sea surface temperature variability in the southwest Pacific: A replication study using multiple coral Sr/Ca records from New Caledonia

2007

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[1] Coral-based climate reconstructions typically have not used multiple cores from a region to capture and replicate a climate signal largely because of concerns of coral conservation, analytical expense, and time constraints. Coral Sr/Ca reproducibility through the twentieth century was investigated using three intracolony and three intercolony coral records from the reefs offshore of Amédée Island, New Caledonia. Different sampling resolutions were examined in coral Sr/Ca (fortnightly and monthly) and d 18 O (fortnightly, monthly, and seasonally) as well as similar scale subsampling of the daily in situ sea surface temperature (SST) record. The mean coral Sr/Ca, d 18 O, and SST values do not change as a function of sampling resolution. The coral Sr/Ca signal is highly reproducible; the average absolute offset between coeval monthly Sr/Ca determinations between any two coral time series is 0.035 ± 0.026 mmol/mol (1s) ($0.65°C), which is less than twice the analytical precision of the coral Sr/Ca measurements. The stack average of the monthly coral Sr/Ca variations and monthly anomalies are significantly correlated with monthly in situ SST (1967SST ( -1992; r = À0.96 and À0.64, respectively; p < 0.05; and n = 302) and 1°grid monthly SST data product ; r = À0.95 and À0.56, respectively; p < 0.05; and n = 1198). The coral Sr/Ca-SST reconstruction exhibits interannual and decadal-timescale fluctuations that exceed those observed in the gridded SST record, which may reflect true differences between SST at a shallow reef site and those averaged over a 1°grid box or inadequacies in the methodology used to create the gridded SST product when few observations are available. A warming trend of $0.6°C is observed in the twentieth century coral Sr/Ca-SST record.

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“…In surface growing corals, it was found that Dp of trace elements can be variable in a single coral due to kinetic artifacts (Cohen et al, 2001;Devilliers et al, 1994;1995). Moreover, fine-scale fluctuations have been found within a skeletal structure both in surface and deep sea corals (Cohen and McConnaughey, 2003;Gagnon et al, 2007;Robinson et al, 2006;Sinclair, 2005). These artifacts are expected to be small in our data because 1) the deep sea coral used in this study is considered to have grown at a constant rate, and 2) we tried to collect coral samples from the same location of the coral discs (close to the calcification center), but they cannot be completely ruled out.…”

Section: Discrepancies Between Model Estimate and Observationmentioning

confidence: 93%

Evolution of anthropogenic Pb and Pb isotopes in the deep North Atlantic Ocean and the Indian Ocean

Lee¹

2013

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, in partial fulfillment of the Requirement for the degree of Doctor of PhilosophyPb and Pb isotopes in the ocean have varied on decadal to centennial time scales due to anthropogenic Pb inputs. Thus, tracing the temporal variation of Pb and Pb isotopes in the ocean provides information on the major sources of Pb and the transport of Pb from sources to the ocean surface and into the ocean interior. In this thesis study, first, a method was developed for the analysis of dissolved Pb and other trace elements in seawater using single batch nitrilotriacetate resin extraction and isotope dilution ICP-MS, which was applied in analyzing seawater Pb concentrations in the rest of the study. A -550 year history of the Pb and Pb isotopes in the deep North Atlantic Ocean is reconstructed using a deep-sea coral, showing the infiltration of anthropogenic Pb to deep sea. Comparing the results to the surface North Atlantic Ocean Pb record using a Transit Time Distribution model, the mean transit time of Pb is estimated to be -64 years. This is longer than the transit time estimate assuming simple advection from a source, showing the importance of advective-diffusive mixing in the transport of Pb to the ocean interior. The later part of the thesis investigates Pb in the Indian Ocean, where no useful Pb data have been previously reported. First, using annually-banded surface growing corals, I reconstruct variations of Pb and isotopes in the surface waters of the central and eastern Indian Oceans during the past half-century. Results of the study show the increase of Pb concentrations from the mid-1970s, and major sources of the Pb are discussed, including leaded gasoline and coal burning, based on their emission histories and Pb isotope signatures. Second, Pb concentration and isotope profiles are presented from the northern and western Indian Oceans. AcknowledgementI would like to thank all the people who made this work possible. First, I owe a big thank to my advisor Ed Boyle. He taught me a lot about trace metal techniques, guided me to find right and important scientific questions whenever I was lost, and supported all my work. Not only that, he was also supportive of me having a family, very understanding and patient, which I cannot be grateful enough.I'd like to thank my committee: Bill Jenkins, Carl Lamborg, Phoebe Lam, and Konrad Hughen. Interests they showed during committee meetings were so inspiring and encouraging. I usually had this magical experience that my work, which looked so boring beforehand, turns into the most interesting one in the world after the committee meeting.I also would like to thank Jess Adkins and Selene Eltgroth, who provided the deep-sea coral and the radiocarbon data used in Chapter 3, and shared their expertise in deep-sea coral analysis with me. My work in Chapter 4 and 5 could not be completed without these people who helped me to collect corals and seawater samples from the Indian Ocean: Miriam Pfeiffer, Aron Meltzner, Kerry Sieh, Bambang Suwargadi, Danny Natawidjaja, Toshitaka Gamo, Hajim...

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Correlated trace element “vital effects” in tropical corals: A new geochemical tool for probing biomineralization

Cited by 115 publications

References 70 publications

The inclusion of sub‐detection limit LA‐ICPMS data, in the analysis of otolith microchemistry, by use of a palindrome sequence analysis (PaSA)

The inclusion of sub‐detection limit LA‐ICPMS data, in the analysis of otolith microchemistry, by use of a palindrome sequence analysis (PaSA)

Reconstructing twentieth‐century sea surface temperature variability in the southwest Pacific: A replication study using multiple coral Sr/Ca records from New Caledonia

Evolution of anthropogenic Pb and Pb isotopes in the deep North Atlantic Ocean and the Indian Ocean

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