Did shifting seawater sulfate concentrations drive the evolution of deep-sea methane-seep ecosystems?

Kiel, Steffen

doi:10.1098/rspb.2014.2908

Cited by 34 publications

(28 citation statements)

References 37 publications

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“…Indeed, most contemporary deep-sea chemosynthetic taxa appear to have originated sometime after the Palaeocene/Eocene thermal maximum (PETM) about 56 Mya (reviewed in Vrijenhoek, 2013). Acquisition of chemosynthetic symbiotic bacteria and the radiations of major pliocardiin lineages and bathymodiolin mussels are also coincident with increased sulphate concentrations during the Early Eocene (»50 Ma) (Kiel, 2015). Large-scale extinctions due to anoxic/dysoxic deep-sea environments during the PETM (Jacobs & Lindberg, 1998) and increased sulphide availability during the Early Eocene might have created the ecological opportunities that facilitated invasions of chemosynthetic environments by new taxa and promoted re-radiations of preexisting stem-lineages (Vrijenhoek, 2013).…”

Section: Discussionmentioning

confidence: 99%

Phylogeny and origins of chemosynthetic vesicomyid clams

Johnson

Krylova

Audzijonytė

et al. 2016

Systematics and Biodiversity

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Large vesicomyid clams (Veneroida: Vesicomyidae: Pliocardiinae) are prominent members of the communities associated with sulphide-rich deep-sea habitats. Taxonomic uncertainties within the Pliocardiinae result from both plasticity in shell morphologies and the common occurrence of cryptic species. Molecular taxonomic studies have now clarified many species-level assignments and provided DNA-barcodes for more than 50 species worldwide. Nonetheless, genus-level assignments remain uncertain, because the existing COI barcode sequences are not sufficient for identifying higher-level groupings. To construct a robust phylogeny for this subfamily, we conducted a combined Bayesian analysis of the COI mitochondrial fragment and five additional independent nuclear gene segments. The phylogenetic results provide a better foundation for assessing genus-level assignments within the subfamily and reveal goals for future taxonomic research. Furthermore, morphological examinations helped to clarify and solidify generic classifications. Calibration of molecular clocks with recently verified fossil data permitted realistic estimates for the origins and evolutionary age of pliocardiins during the Cenozoic Era from a deep-dwelling ancestor.http://zoobank.org/urn:lsid:zoobank

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Section: Discussionmentioning

confidence: 99%

Phylogeny and origins of chemosynthetic vesicomyid clams

Johnson

Krylova

Audzijonytė

et al. 2016

Systematics and Biodiversity

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“…Because anaerobic methane oxidation leads to an increase in pH and alkalinity, carbonate precipitation is often associated with both methane diffusion-limited and methane-in-excess sulfate-driven AOM. This authigenic carbonate can fossilize; carbonate accretions are found throughout the geological record (e.g., Jiang et al, 2003;Kiel, 2015), often containing exceptionally 13 C depleted carbonate highly suggestive of the methane source (e.g., Peckmann and Thiel, 2004). However, 13 C-depleted carbonate, produced from methane oxidation, does not distinguish the paleoenvironment of methane consumption or its link to microbial sulfate reduction.…”

Section: Introductionmentioning

confidence: 99%

A unique isotopic fingerprint of sulfate-driven anaerobic oxidation of methane

Antler

Turchyn

Herut

et al. 2015

Geology

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The largest reservoir of the powerful greenhouse gas methane is in marine sediments, and catastrophic release of this methane has been invoked to explain climate perturbations throughout Earth history. Marine methane oxidation is mainly coupled anaerobically to microbial sulfate reduction, which both limits and controls the release of methane from this sedimentary reservoir to the rest of Earth's surface. Methane can be transported within the pore space of marine sediments either via diffusion or as bubbles. When methane travels in bubbles, these bubbles often are not completely oxidized and reach the overlying water where the methane emerges from the sediment in cold seeps. Although paleo-cold seeps can be identified by geological features such as carbonate mounds, a geochemical signature for cold seeps remains elusive. We demonstrate, using the sulfur and oxygen isotope composition of sulfate, that a unique isotopic signature emerges during microbial sulfate reduction coupled to methane oxidation in bubbling cold seeps. This isotope signature differs from that when sulfate is reduced by either organic matter oxidation or by the slower, diffusive flux of methane within marine sediments. We also show, through a comparison with the literature, that this unique isotope fingerprint is preserved in the rock record in authigenic buildups of barite associated with methane cold seeps. δ Figure 3. The d 18 O SO 4 versus d 34 S SO 4 data from cold methane seeps and seeps analogues (gray symbols) and barite deposits associated with cold methane seeps (white symbols) from the Gulf of Mexico (rhombus, Fu and Aharon, 1997; squares, Feng and Roberts, 2011) and from the Sea of Okhotsk (circles, Greinert et al., 2002). VCDT-Vienna Canyon Diablo troilite; VSMOW-Vienna standard mean ocean water.as

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“…The question of the origin of hydrothermal vent organisms should be place in the larger framework of the origin of deep-sea biodiversity (e.g. [49,53,54]). The main challenges are the sampling efforts, needed both to obtain adequate present and fossil evidences.…”

Section: Discussionmentioning

confidence: 99%

Evolutionary origins of hydrothermal vents metazoans

Samadi

2015

BIO Web of Conferences

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Abstract. The discovery of the oases associated with hydrothermal vents in the deep sea, is probably the most fascinating discovery of oceanography of the last century. In this habitat, contrary to all expectations, a thriving development of unknown organisms was observed. At that time the knowledge about the deep sea organisms was very scarce and the accepted hypotheses about their evolutionary origins, their physiology or their ecology were very speculative. Almost forty years later, exploration of the deep-sea realm, but also of paleontological data together with the improvements in the phylogenetic methods, allowed the rejection of the hypothesis of an evolutionary history cut off the rest of the marine realm. Life in the deep sea: Knowledge is recentIn the thirty years after the discovery of the deep-sea oases associated with hot vents much of the research efforts of the marine biologists have been devoted to this exceptional environment and its inhabitants. However, when the hot vents have been discovered, the deep-sea realm was still poorly known. At this time, most of the available hypotheses about the functioning of deep sea ecosystems, or about the physiology or the evolutionary origins of the organisms were very speculative. In this historical context, I selected three hypotheses which I feel have played a major role in the analysis of the diversity of hot vents' organisms and their evolutionary origins.

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Did shifting seawater sulfate concentrations drive the evolution of deep-sea methane-seep ecosystems?

Cited by 34 publications

References 37 publications

Phylogeny and origins of chemosynthetic vesicomyid clams

Phylogeny and origins of chemosynthetic vesicomyid clams

A unique isotopic fingerprint of sulfate-driven anaerobic oxidation of methane

Evolutionary origins of hydrothermal vents metazoans

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