Stylasterid corals: A new paleotemperature archive

Samperiz, Ana; Robinson, Laura F.; Stewart, Joseph; Strawson, Ivo; Leng, Melanie J.; Rosenheim, B. E.; Ciscato, Emily R.; Hendry, Katharine R.; Santodomingo, Nadiezhda

doi:10.1016/j.epsl.2020.116407

Cited by 9 publications

(39 citation statements)

References 46 publications

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“…We therefore group these samples under family Caryophylliidae for discussion. We also group stylasterids by mineralogy (i) solely aragonite (E. antarctica, E. boschmai, E. altispina, S. robustus, S. densicaulis, S. erubescens, S. ibericus, S. marenzelli), (ii) both aragonite and high-Mg calcite (E. gracilis; 4 to 8 weight percent high-Mg calcite), and (iii) solely high-Mg calcite (E. laterorifa) Cairns and Macintyre, 1992;Samperiz et al, 2020. Where possible seawater temperature data were taken from co-located remotely operated vehicle or CTD (conductivity, temperature, and depth) profiles taken during the respective research cruise (DY081; JC094; CINMS; NBP1103) or repeat seawater monitoring expeditions (Comau Fjord). These research cruise measurements are on average 30 km from coral sampling sites and typically within 30 m depth of the samples.…”

Section: Samples and Hydrographic Datamentioning

confidence: 99%

“…Similar to our compilation of sub-surface temperature, we estimate δ 18 O of seawater for each site using co-located measurements taken by remotely operated vehicle or CTD during the coral sampling expedition (JC094 and NBP1103); (Samperiz et al, 2020).…”

Section: Samples and Hydrographic Datamentioning

confidence: 99%

“…Where such data are unavailable, δ 18 O of seawater was taken from nearby sites in the NASA Global Seawater Oxygen-18 Database (Schmidt et al, 1999). No nearby seawater δ 18 O data exist for Comau Fjord in any database, hence we assume values of mean ocean seawater (0 ) for these sites (Supplementary Information).…”

Section: Samples and Hydrographic Datamentioning

confidence: 99%

“…A recent study shows that stylasterid coral skeletal δ 18 O remains relatively close to equilibrium with seawater and is thus minimally impacted by growth-rate effects and well-correlated with seawater temperature (Samperiz et al, 2020). Yet, there remains no study to date characterising trace metal compositions of either aragonitic or calcitic stylasterid corals, hence their paleoceanographic proxy potential and biocalcification mechanisms remain poorly understood.…”

Section: Introductionmentioning

confidence: 99%

“…To assess temperature proxies within different marine carbonate mineralogies, we present skeletal Li/Mg, Sr/Ca, and δ 18 O data obtained from modern cold-water coral calyxes from seawater temperatures ranging from 0 to 16 • C. These specimens comprise 7 genera of common deep-water scleractinia as well as two genera of stylasterid corals (Stylaster and Errina) that represent all three modes of stylasterid skeletal mineralogy: (i) solely aragonite, (ii) both aragonite and high-Mg calcite, and (iii) solely high-Mg calcite (Cairns and Macintyre, 1992;Samperiz et al, 2020). We present data from the same stylasterid specimens for which δ 18 O has been previously characterised (Samperiz et al, 2020) for com-parison with our trace metal data.…”

Section: Introductionmentioning

confidence: 99%

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Refining trace metal temperature proxies in cold-water scleractinian and stylasterid corals

Stewart

Robinson

Day

et al. 2020

Earth and Planetary Science Letters

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The Li/Mg, Sr/Ca and oxygen isotopic (δ 18 O) compositions of many marine biogenic carbonates are sensitive to seawater temperature. Corals, as cosmopolitan marine taxa with carbonate skeletons that can be precisely dated, represent ideal hosts for these geochemical proxies. However, efforts to calibrate and refine temperature proxies in cold-water corals (<20 • C) remain limited. Here we present skeletal Li/Mg, Sr/Ca, δ 18 O and carbon isotope (δ 13 C) data from live-collected specimens of aragonitic scleractinian corals (Balanophyllia, Caryophyllia, Desmophyllum, Enallopsammia, Flabellum, Lophelia, and Vaughanella), both aragonitic and high-Mg calcitic stylasterid genera (Stylaster and Errina), and shallow-water high-Mg calcite crustose coralline algae (Lithophyllum, Hydrolithon, and Neogoniolithon). We interpret these data in conjunction with results from previously explored taxa including aragonitic zooxanthellate scleractinia and foraminifera, and high-Mg calcite octocorals. We show that Li/Mg ratios covary most strongly with seawater temperature, both for aragonitic and high-Mg calcitic taxa, making for reliable and universal seawater temperature proxies. Combining all of our biogenic aragonitic Li/Mg data with previous calibration efforts we report a refined relationship to temperature: Li/Mg All Aragonite = 5.42 exp(−0.050 × T (• C)) (R 2 = 0.97). This calibration now permits paleo-temperature reconstruction to better than ±3.4 • C (95% prediction intervals) across biogenic aragonites, regardless of taxon, from 0 to 30 • C. For taxa in this study, aragonitic stylasterid Li/Mg offers the most robust temperature proxy (Li/Mg Stylasterid (Arag) = 5.64 exp(−0.046 × T (• C)) (R 2 = 0.95)) with a reproducibility of ±2.3 • C. For the first time, we show that high-Mg calcites have a similar exponential relationship with temperature, but with a lower intercept value (Li/Mg = 0.63 exp(−0.050 × T (• C) (R 2 = 0.92)). This calibration opens the possibility of temperature reconstruction using high-Mg calcite corals and coralline algae. The commonality in the relationship between Li/Mg and temperature transcends phylogeny and suggests a similar abiogenic trace metal incorporation mechanism.

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Section: Samples and Hydrographic Datamentioning

confidence: 99%

Section: Samples and Hydrographic Datamentioning

confidence: 99%

Section: Samples and Hydrographic Datamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Refining trace metal temperature proxies in cold-water scleractinian and stylasterid corals

Stewart

Robinson

Day

et al. 2020

Earth and Planetary Science Letters

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Sclerochronology in the Southern Ocean

González

2021

Polar Biol

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This manuscript aims to provide a comprehensive review of the work done by Antarctic sclerochronology research across different taxa (arthropods, bivalves, brachiopods, bryozoans, cephalopods, hard and soft corals, gastropods, echinoderms and teleost fish), provide an analysis of current challenges in the discipline and start a discussion of what sclerochronology can offer for Antarctic research in future. The Southern Ocean ecosystem remains largely unstudied in part for its remoteness, extreme climate and strong seasonality. This lack of knowledge, some of it even on basic biological information, it is especially worrying due to ongoing climate-driven changes that the Southern Ocean ecosystem is experiencing. Lack of long-term in situ instrumental series has also being a detriment to understand long-term feedbacks between the physical environment and the ecosystem. Sclerochronology, the study of periodic accretional patterns in the hard body structures of living organisms, has contributed to a wide range of Antarctic research disciplines (e.g. paleoclimate reconstructions, population structure analysis, environmental proxies). This review highlights a disparity in research focus by taxa with some groups (e.g. bivalves, teleost fish) attracting most of the research attention, whereas other groups (e.g. gastropod) have attracted much little research attention or in some cases it is almost non-existent (e.g. echinoderms). Some of the long-lived species considered in this review have the potential to provide the much-needed high-resolution eco-environmental proxy data and play an important role in blue carbon storage in the Sothern Ocean. Another issue identified was the lack of cross-validation between analytical techniques. Graphic abstract

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