Mid-Cretaceous (Albian–Santonian) sea surface temperature record of the tropical Atlantic Ocean

Forster, Astrid; Schouten, Stefan; Baas, Marianne; Damsté, Jaap S. Sinninghe

doi:10.1130/g23874a.1

Cited by 207 publications

(130 citation statements)

References 26 publications

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“…Live birth was widespread among ichthyosaurs 23 and has only recently been reported for plesiosaurs 24 and mosasaurs 25 . In the first two groups, d 18 O values of bone phosphate tissue support the hypothesis of bodytemperature regulation 26 . Whether metriorhynchoids had some sort of endothermic capability would be consistent with our results, also supported by their inferred hypercarnivorous diet 27 , fulfilling the high metabolic demand for protein.…”

Section: Discussionsupporting

confidence: 59%

“…On the other hand, some drops in crocodylomorph diversity correspond to temperature declines such as that of the Callovian affecting thalattosuchian diversity or the Valanginian-Hauterivian boundary affecting metriorhynchoids. Concerning the extinction of Pholidosauridae in the Turonian and Dyrosauridae in the Ypresian, a clear match between SST and diversity is absent, even when considering finescale SST variations reconstructed using other proxies 18,19 . Among the considered marine crocodylomorph lineages, the metriorhynchoids clearly stand out with an explosive radiation at the end of the Jurassic, when SSTs continued to decrease.…”

Section: Discussionmentioning

confidence: 99%

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Sea surface temperature contributes to marine crocodylomorph evolution

et al. 2014

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During the Mesozoic and Cenozoic, four distinct crocodylomorph lineages colonized the marine environment. They were conspicuously absent from high latitudes, which in the Mesozoic were occupied by warm-blooded ichthyosaurs and plesiosaurs. Despite a relatively well-constrained stratigraphic distribution, the varying diversities of marine crocodylomorphs are poorly understood, because their extinctions neither coincided with any major biological crises nor with the advent of potential competitors. Here we test the potential link between their evolutionary history in terms of taxic diversity and two abiotic factors, sea level variations and sea surface temperatures (SST). Excluding Metriorhynchoidea, which may have had a peculiar ecology, significant correlations obtained between generic diversity and estimated Tethyan SST suggest that water temperature was a driver of marine crocodylomorph diversity. Being most probably ectothermic reptiles, these lineages colonized the marine realm and diversified during warm periods, then declined or became extinct during cold intervals.

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Section: Discussionsupporting

confidence: 59%

Section: Discussionmentioning

confidence: 99%

Sea surface temperature contributes to marine crocodylomorph evolution

et al. 2014

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“…A similar SST trend can be seen in the d 18 O profile of hemipelagic marls at Site 547 (Nederbragt et al 2001), and it is further reproduced by long-term TEX 86 thermometry from organic carbon-rich sediments of ODP Site 1258, Demerara Rise, equatorial Atlantic (Forster et al 2007a). Such a similarity between independent SST proxies at distant sites implicates the global nature of the A-C warming-to-cooling trend.…”

supporting

confidence: 54%

Depth-habitat reorganization of planktonic foraminifera across the Albian/Cenomanian boundary

Ando¹,

Huber²,

MacLeod³

2010

Paleobiology

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Abstract.-New mid-Cretaceous stable isotope (d 18 O and d 13 C) records of multiple planktonic foraminiferal species and coexisting coccoliths from Blake Nose (western North Atlantic) document a major depth-ecology reorganization of planktonic foraminifera. Across the Albian/Cenomanian boundary, deep-dwelling Praeglobotruncana stephani and Rotalipora globotruncanoides adapted to living at a shallower depth, while, at the same time, the population of surface-dwelling Paracostellagerina libyca declined. Subsequently, the opportunistic species Hedbergella delrioensis shifted to a deep environment, and the deep-dwelling forms Rotalipora montsalvensis and Rotalipora reicheli first appeared. The primary paleoenvironmental cause of the observed changes in planktonic adaptive strategies is uncertain, yet their coincidence with an earliest Cenomanian cooling trend reported elsewhere implicates the importance of reduced upper-ocean stratification. Although there has been an implicit assumption that the species-specific depth habitats of fossil planktonic foraminifera were invariant through time, planktonic paleoecology is a potential variable. Accordingly, the possibility of evolutionary changes in planktonic foraminiferal depth ecology should be a primary consideration (along with other environmental parameters) in paleoceanographic interpretations of foraminiferal stable isotope data.

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“…This ratio has been calibrated with a global set of core tops (Kim et al, 2008(Kim et al, , 2010 and has been frequently used in studies to reconstruct past changes in SST (e.g. Huguet et al, 2006c;Forster et al, 2007;Liu et al, 2009;Bijl et al, 2009). The proxy is based on the assumption that the distribution of pelagic thaumarchaeal membrane lipids changes with temperature, which has been suggested previously for other phyla of Archaea (Gliozzi et al, 1983;Gabriel and Chong, 2000;Cavicchioli, 2006), and that this signal is preserved in sediments.…”

Section: Introductionmentioning

confidence: 99%

Intact polar and core glycerol dibiphytanyl glycerol tetraether lipids in the Arabian Sea oxygen minimum zone. Part II: Selective preservation and degradation in sediments and consequences for the TEX86

Lengger

Hopmans

Reichart

et al. 2012

Geochimica et Cosmochimica Acta

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The TEX 86 is a proxy based on a ratio of pelagic archaeal glycerol dibiphytanyl glycerol tetraether lipids (GDGTs), and used for estimating past sea water temperatures. Concerns exist that in situ production of GDGTs lipids by sedimentary Archaea may affect its validity. In this study, we investigated the influence of benthic GDGT production on the TEX 86 by analyzing the concentrations and distributions of GDGTs present as intact polar lipids (IPLs) and as core lipids (CLs) in three sediment cores deposited under contrasting redox conditions across a depth range from 900 to 3000 m below sea level in and below the Arabian Sea oxygen minimum zone (OMZ). Direct analysis of IPLs with crenarchaeol as CL via HPLC/ESI-MS 2 revealed that surface sediments in the OMZ were relatively depleted in the phospholipid hexose, phosphohexose (HPH)-crenarchaeol compared to suspended particulate matter from the water column, suggesting preferential and rapid degradation of this IPL. In sediment cores recovered from deeper, more oxic environments, concentrations of HPH-crenarchaeol peaked at the surface, probably due to in situ production by ammonia-oxidizing Archaea, followed by a rapid decrease with increasing depth. No surface maximum was observed in the sediment core from within the OMZ. In contrast, the glycolipids, monohexose-crenarchaeol and dihexose-crenarchaeol, did not change in concentration with depth in the sediment, indicating that they were relatively well preserved and likely mostly derived from fossil pelagic GDGTs. These results suggest that phospholipids are more sensitive to degradation, while glycolipids might be preserved over longer time scales, in line with previous incubation and modeling studies. Furthermore, in situ produced IPL-GDGTs did not accumulate as IPLs, and did not influence the CL-TEX 86 . This suggests that in-situ produced GDGT lipids were more susceptible to degradation than fossil CL and IPL and did not accumulate as CL. In agreement, no significant changes of TEX 86 with sediment depth in the core lipids were observed. However, consistent differences between IPL-derived TEX 86 and CL-TEX 86 were found. These could be explained by a different composition of CL-GDGT of the glyco-and phospholipids, in combination with dissimilar degradation rates of phospholipids vs. glycolipids. We also observed consistent differences in both IPL-derived and CL-TEX 86 between the different cores, equivalent to 3°C when converted to temperature, despite the proximity of the core locations. These differences may potentially be due to a larger addition of GDGTs produced in deeper, colder waters to the (sub)surface-derived GDGTs for the deeper core sites.

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Mid-Cretaceous (Albian–Santonian) sea surface temperature record of the tropical Atlantic Ocean

Cited by 207 publications

References 26 publications

Sea surface temperature contributes to marine crocodylomorph evolution

Sea surface temperature contributes to marine crocodylomorph evolution

Depth-habitat reorganization of planktonic foraminifera across the Albian/Cenomanian boundary

Intact polar and core glycerol dibiphytanyl glycerol tetraether lipids in the Arabian Sea oxygen minimum zone. Part II: Selective preservation and degradation in sediments and consequences for the TEX86

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