Early sponges and toxic protists: possible sources of cryostane, an age diagnostic biomarker antedating Sturtian Snowball Earth.

Abstract:

:The period 800-717 million years (Ma) ago, in the lead-up to the Sturtian Snowball glaciation, saw an increase in the diversity of eukaryotic microfossils. To afford an independent and complementary view of this evolutionary period, this study presents the distribution of eukaryotic biomarkers from three pre-Sturtian successions across the supercontinent Rodinia: the ca. 780 Ma Kanpa Formation of the Western Australian Officer Basin, the ca. 800-740 Ma Visingsö Group of Sweden, and the 740 Ma Chuar Group in Arizona, USA. The distribution of eukaryotic steranes is remarkably similar in the three successions but distinct from all other known younger and older sterane assemblages. Cholestane was the only conventional structure, while indigenous steranes alkylated in position C-24, such as ergostane, stigmastane, dinosterane and isopropylcholestane, and n-propylcholestane, were not observed. This sterane distribution appears to be age diagnostic for the pre-Sturtian Neoproterozoic. It attests to the distinct evolutionary state of pre-Snowball eukaryotes, pointing to a taxonomic disparity that was still lower than in the Ediacaran (635-541 Ma). All three basins also show the presence of a new C28 sterane that was tentatively identified as 26-methylcholestane, here named cryostane. The only known extant organisms that can methylate sterols in the 26-position are demosponges. This assignment is plausible as molecular clocks place the appearance of the earliest animals into the pre-Sturtian Neoproterozoic. The unusual 26-methylsterol may have protected sponges, but also other eukaryotes, against their own membranolytic toxins. Some protists release lytic toxins to deter predators and kill eukaryotic prey. As conventional membrane sterols can be the site of attack for these toxins, sterols with unusual side-chain modification protect the cell. This interpretation of cryostane supports fossil evidence of predation in the Chuar Group and promotes hypotheses about the proliferation of eukaryophagy in the lead-up to the Cryogenian.

journal_name

Geobiology

journal_title

Geobiology

authors

Brocks JJ,Jarrett AJ,Sirantoine E,Kenig F,Moczydłowska M,Porter S,Hope J

doi

10.1111/gbi.12165

subject

Has Abstract

pub_date

2016-03-01 00:00:00

pages

129-49

issue

2

eissn

1472-4677

issn

1472-4669

journal_volume

14

pub_type

杂志文章
  • Microbialite taphonomy and biogenicity: new insights from NanoSIMS.

    abstract::We here show that nano-scale mapping of elements commonly utilized in biological cycles provides a promising new additional line of evidence when evaluating the extent of the contribution of biology to microbialites. Our case study comes from Lake Clifton in Western Australia, a unique environment where living domical...

    journal_title:Geobiology

    pub_type: 杂志文章

    doi:10.1111/j.1472-4669.2010.00251.x

    authors: Wacey D,Gleeson D,Kilburn MR

    更新日期:2010-12-01 00:00:00

  • Insights into chemotaxonomic composition and carbon cycling of phototrophic communities in an artesian sulfur-rich spring (Zodletone, Oklahoma, USA), a possible analog for ancient microbial mat systems.

    abstract::Zodletone spring in Oklahoma is a unique environment with high concentrations of dissolved-sulfide (10 mm) and short-chain gaseous alkanes, exhibiting characteristics that are reminiscent of conditions that are thought to have existed in Earth's history, in particular the late Archean and early-to-mid Proterozoic. Her...

    journal_title:Geobiology

    pub_type: 杂志文章

    doi:10.1111/j.1472-4669.2010.00268.x

    authors: Bühring SI,Sievert SM,Jonkers HM,Ertefai T,Elshahed MS,Krumholz LR,Hinrichs KU

    更新日期:2011-03-01 00:00:00

  • Hydrocarbons preserved in a ~2.7 Ga outcrop sample from the Fortescue Group, Pilbara Craton, Western Australia.

    abstract::The hydrocarbons preserved in an Archean rock were extracted, and their composition and distribution in consecutive slices from the outside to the inside of the rock were examined. The 2.7 Ga rock was collected from the Fortescue Group in the Pilbara region, Western Australia. The bitumen I (solvent-extracted rock) an...

    journal_title:Geobiology

    pub_type: 杂志文章

    doi:10.1111/gbi.12117

    authors: Hoshino Y,Flannery DT,Walter MR,George SC

    更新日期:2015-03-01 00:00:00

  • Coupling hydrocarbon degradation to anaerobic respiration and mineral diagenesis: theoretical constraints.

    abstract::The diagenetic mineral assemblages in petroleum reservoirs control the formation fluid pH and pCO(2). Anaerobic biodegradation of petroleum is controlled by the transfer of electrons from reduced organic species to inorganic, redox sensitive, aqueous and mineral species in many cases through intermediates such as H(2)...

    journal_title:Geobiology

    pub_type: 杂志文章

    doi:10.1111/j.1472-4669.2009.00224.x

    authors: Onstott TC,Hinton SM,Silver BJ,King HE Jr

    更新日期:2010-01-01 00:00:00

  • Energetics of Acidianus ambivalens growth in response to oxygen availability.

    abstract::All life requires energy to drive metabolic reactions such as growth and cell maintenance; therefore, fluctuations in energy availability can alter microbial activity. There is a gap in our knowledge concerning how energy availability affects the growth of extreme chemolithoautotrophs. Toward this end, we investigated...

    journal_title:Geobiology

    pub_type: 杂志文章

    doi:10.1111/gbi.12413

    authors: Hart C,Gorman-Lewis D

    更新日期:2021-01-01 00:00:00

  • Formation of large carbonate concretions in black cherts in the Gufeng Formation (Guadalupian) at Enshi, South China.

    abstract::The formation of carbonate concretions is a cementation process which passively infills the pore spaces within sediments. They record the original environments of deposition and diagenetic conditions of the host rocks. Little is known about the precise mechanisms responsible for the precipitation of carbonate concreti...

    journal_title:Geobiology

    pub_type: 杂志文章

    doi:10.1111/gbi.12362

    authors: Wei H,Tang Z,Qiu Z,Yan D,Bai M

    更新日期:2020-01-01 00:00:00

  • Oxygen isotope analysis of bacterial and fungal manganese oxidation.

    abstract::The ability of micro-organisms to oxidize manganese (Mn) from Mn(II) to Mn(III/IV) oxides transcends boundaries of biological clade or domain. Many bacteria and fungi oxidize Mn(II) to Mn(III/IV) oxides directly through enzymatic activity or indirectly through the production of reactive oxygen species. Here, we determ...

    journal_title:Geobiology

    pub_type: 杂志文章

    doi:10.1111/gbi.12288

    authors: Sutherland KM,Wankel SD,Hansel CM

    更新日期:2018-07-01 00:00:00

  • Constraining oceanic oxygenation during the Shuram excursion in South China using thallium isotopes.

    abstract::Ediacaran sediments record an unusual global carbon cycle perturbation that has been linked to widespread oceanic oxygenation, the Shuram negative C isotope excursion (NCIE). However, proxy-based estimates of global ocean redox conditions during this event have been limited largely due to proxy specificity (e.g., euxi...

    journal_title:Geobiology

    pub_type: 杂志文章

    doi:10.1111/gbi.12379

    authors: Fan H,Nielsen SG,Owens JD,Auro M,Shu Y,Hardisty DS,Horner TJ,Bowman CN,Young SA,Wen H

    更新日期:2020-05-01 00:00:00

  • The environmental disaster of Aznalcóllar (southern Spain) as an approach to the Cretaceous-Palaeogene mass extinction event.

    abstract::Biotic recovery after the Cretaceous-Palaeogene (K-Pg) impact is one unsolved question concerning this mass extinction event. To evaluate the incidence of the K-Pg event on biota, and the subsequent recovery, a recent environmental disaster has been analysed. Areas affected by the contamination disaster of Aználcollar...

    journal_title:Geobiology

    pub_type: 杂志文章

    doi:10.1111/j.1472-4669.2009.00213.x

    authors: Rodríguez-Tovar FJ,Martín-Peinado FJ

    更新日期:2009-12-01 00:00:00

  • On the co-evolution of surface oxygen levels and animals.

    abstract::Few topics in geobiology have been as extensively debated as the role of Earth's oxygenation in controlling when and why animals emerged and diversified. All currently described animals require oxygen for at least a portion of their life cycle. Therefore, the transition to an oxygenated planet was a prerequisite for t...

    journal_title:Geobiology

    pub_type: 杂志文章,评审

    doi:10.1111/gbi.12382

    authors: Cole DB,Mills DB,Erwin DH,Sperling EA,Porter SM,Reinhard CT,Planavsky NJ

    更新日期:2020-05-01 00:00:00

  • Hematite-coated microfossils: primary ecological fingerprint or taphonomic oddity of the Paleoproterozoic?

    abstract::Microfossils belonging to the 1.88-billion-year-old 'Gunflint-biota' are preserved as carbonaceous and hematitic filaments and spheres that are believed to represent ancient chemolithoautotrophic Fe(II) oxidizing bacteria that grew above a chemocline where ferruginous seawater upwelled into shallow, oxygenated waters....

    journal_title:Geobiology

    pub_type: 杂志文章

    doi:10.1111/gbi.12127

    authors: Shapiro RS,Konhauser KO

    更新日期:2015-05-01 00:00:00

  • An experimental and theoretical approach to determining linkages between geochemical variability and microbial biodiversity in seafloor hydrothermal chimneys.

    abstract::New experimental results of fluid-mineral reactions at hydrothermal conditions relevant to life demonstrate that key redox reactions involving iron, sulfur, and hydrogen remain at disequilibrium at 100 °C, even in a heterogeneous system and thus are energetically favorable for microbial metabolism. Predictions from ge...

    journal_title:Geobiology

    pub_type: 杂志文章

    doi:10.1111/j.1472-4669.2010.00255.x

    authors: Houghton JL,Seyfried WE Jr

    更新日期:2010-12-01 00:00:00

  • Carbonate ooids of the Mesoarchaean Pongola Supergroup, South Africa.

    abstract::Ooids from the Mesoarchaean Chobeni Formation, Pongola Supergroup, KwaZulu-Natal, South Africa are older than any ooids reported to date. They are made of dolomite and ankerite and show concentric, radial-concentric, micritic, and radial fabrics. Radial ooids are interpreted to have originated from high-Mg-calcite and...

    journal_title:Geobiology

    pub_type: 杂志文章

    doi:10.1111/gbi.12249

    authors: Siahi M,Hofmann A,Master S,Mueller CW,Gerdes A

    更新日期:2017-11-01 00:00:00

  • Changes in northern Gulf of Mexico sediment bacterial and archaeal communities exposed to hypoxia.

    abstract::Biogeochemical changes in marine sediments during coastal water hypoxia are well described, but less is known about underlying changes in microbial communities. Bacterial and archaeal communities in Louisiana continental shelf (LCS) hypoxic zone sediments were characterized by pyrosequencing 16S rRNA V4-region gene fr...

    journal_title:Geobiology

    pub_type: 杂志文章

    doi:10.1111/gbi.12142

    authors: Devereux R,Mosher JJ,Vishnivetskaya TA,Brown SD,Beddick DL Jr,Yates DF,Palumbo AV

    更新日期:2015-09-01 00:00:00

  • Morphological and isotopic changes of heterocystous cyanobacteria in response to N2 partial pressure.

    abstract::Earth's atmospheric composition has changed significantly over geologic time. Many redox active atmospheric constituents have left evidence of their presence, while inert constituents such as dinitrogen gas (N2 ) are more elusive. In this study, we examine two potential biological indicators of atmospheric N2 : the mo...

    journal_title:Geobiology

    pub_type: 杂志文章

    doi:10.1111/gbi.12312

    authors: Silverman SN,Kopf SH,Bebout BM,Gordon R,Som SM

    更新日期:2019-01-01 00:00:00

  • Mineralization of Alvinella polychaete tubes at hydrothermal vents.

    abstract::Alvinellid polychaete worms form multilayered organic tubes in the hottest and most rapidly growing areas of deep-sea hydrothermal vent chimneys. Over short periods of time, these tubes can become entirely mineralized within this environment. Documenting the nature of this process in terms of the stages of mineralizat...

    journal_title:Geobiology

    pub_type: 杂志文章

    doi:10.1111/gbi.12123

    authors: Georgieva MN,Little CT,Ball AD,Glover AG

    更新日期:2015-03-01 00:00:00

  • Microbial metabolite fluxes in a model marine anoxic ecosystem.

    abstract::Permanently anoxic regions in the ocean are widespread and exhibit unique microbial metabolic activity exerting substantial influence on global elemental cycles and climate. Reconstructing microbial metabolic activity rates in these regions has been challenging, due to the technical difficulty of direct rate measureme...

    journal_title:Geobiology

    pub_type: 杂志文章

    doi:10.1111/gbi.12357

    authors: Louca S,Astor YM,Doebeli M,Taylor GT,Scranton MI

    更新日期:2019-11-01 00:00:00

  • The microbe-mineral environment and gypsum neogenesis in a weathered polar evaporite.

    abstract::Evaporitic deposits are a globally widespread habitat for micro-organisms. The microbe-mineral environment in weathered and remobilized gypsum from exposed mid-Ordovician marine evaporite beds in the polar desert of Devon Island, Nunavut, Canadian High Arctic was examined. The gypsum is characterized by internal green...

    journal_title:Geobiology

    pub_type: 杂志文章

    doi:10.1111/j.1472-4669.2010.00240.x

    authors: Cockell CS,Osinski GR,Banerjee NR,Howard KT,Gilmour I,Watson JS

    更新日期:2010-09-01 00:00:00

  • Biostabilization of cohesive sediments: revisiting the role of abiotic conditions, physiology and diversity of microbes, polymeric secretion, and biofilm architecture.

    abstract::In aquatic habitats, micro-organisms successfully adhere to and mediate particles, thus changing the erosive response of fine sediments to hydrodynamic forcing by secreting glue-like extracellular polymeric substances (EPS). Because sediment dynamics is vital for many ecological and economic aspects of watersheds and ...

    journal_title:Geobiology

    pub_type: 杂志文章,评审

    doi:10.1111/gbi.12115

    authors: Gerbersdorf SU,Wieprecht S

    更新日期:2015-01-01 00:00:00

  • Seeing the forest with the leaves - clues to canopy placement from leaf fossil size and venation characteristics.

    abstract::Although a variety of leaf characteristics appear to be induced by light environment during development, analysis of ontogenetic changes in living broad leaved trees has suggested that a number of other traits also lumped into the classic 'sun' versus 'shade' morphological distinctions, including leaf size, shape, and...

    journal_title:Geobiology

    pub_type: 杂志文章

    doi:10.1111/j.1472-4669.2008.00176.x

    authors: Boyce CK

    更新日期:2009-03-01 00:00:00

  • The late-stage "ferruginization" of the Ediacara Member (Rawnsley Quartzite, South Australia): Insights from uranium isotopes.

    abstract::The paleoenvironmental setting in which the Ediacara Biota lived, died, and was preserved in the eponymous Ediacara Member of the Rawnsley Quartzite of South Australia is an issue of long-standing interest and recent debate. Over the past few decades, interpretations have ranged from deep marine to shallow marine to t...

    journal_title:Geobiology

    pub_type: 杂志文章

    doi:10.1111/gbi.12262

    authors: Tarhan LG,Planavsky NJ,Wang X,Bellefroid EJ,Droser ML,Gehling JG

    更新日期:2018-01-01 00:00:00

  • Environmental insights from high-resolution (SIMS) sulfur isotope analyses of sulfides in Proterozoic microbialites with diverse mat textures.

    abstract::In modern microbial mats, hydrogen sulfide shows pronounced sulfur isotope (δ34 S) variability over small spatial scales (~50‰ over <4 mm), providing information about microbial sulfur cycling within different ecological niches in the mat. In the geological record, the location of pyrite formation, overprinting from m...

    journal_title:Geobiology

    pub_type: 杂志文章

    doi:10.1111/gbi.12265

    authors: Gomes ML,Fike DA,Bergmann KD,Jones C,Knoll AH

    更新日期:2018-01-01 00:00:00

  • Cr isotopic insights into ca. 1.9 Ga oxidative weathering of the continents using the Beaverlodge Lake paleosol, Northwest Territories, Canada.

    abstract::The ca. 1.9 Ga Beaverlodge Lake paleosol was studied using redox-sensitive Cr isotopes in order to determine the isotopic response to paleoweathering of a rhyodacite parent rock 500 million years after the Great Oxidation Event. Redox reactions occurring in modern weathering environments produce Cr(VI) that is enriche...

    journal_title:Geobiology

    pub_type: 杂志文章

    doi:10.1111/gbi.12342

    authors: Toma J,Holmden C,Shakotko P,Pan Y,Ootes L

    更新日期:2019-09-01 00:00:00

  • Microbial colonization of metal sulfide minerals at a diffuse-flow deep-sea hydrothermal vent at 9°50'N on the East Pacific Rise.

    abstract::Metal sulfide minerals, including mercury sulfides (HgS), are widespread in hydrothermal vent systems where sulfur-oxidizing microbes are prevalent. Questions remain as to the impact of mineral composition and structure on sulfur-oxidizing microbial populations at deep-sea hydrothermal vents, including the possible ro...

    journal_title:Geobiology

    pub_type: 杂志文章

    doi:10.1111/gbi.12396

    authors: Wang CH,Gulmann LK,Zhang T,Farfan GA,Hansel CM,Sievert SM

    更新日期:2020-09-01 00:00:00

  • The geobiological nitrogen cycle: From microbes to the mantle.

    abstract::Nitrogen forms an integral part of the main building blocks of life, including DNA, RNA, and proteins. N2 is the dominant gas in Earth's atmosphere, and nitrogen is stored in all of Earth's geological reservoirs, including the crust, the mantle, and the core. As such, nitrogen geochemistry is fundamental to the evolut...

    journal_title:Geobiology

    pub_type: 杂志文章,评审

    doi:10.1111/gbi.12228

    authors: Zerkle AL,Mikhail S

    更新日期:2017-05-01 00:00:00

  • A diagenetic control on the Early Triassic Smithian-Spathian carbon isotopic excursions recorded in the marine settings of the Thaynes Group (Utah, USA).

    abstract::In the aftermath of the end-Permian mass extinction, Early Triassic sediments record some of the largest Phanerozoic carbon isotopic excursions. Among them, a global Smithian-negative carbonate carbon isotope excursion has been identified, followed by an abrupt increase across the Smithian-Spathian boundary (SSB; ~250...

    journal_title:Geobiology

    pub_type: 杂志文章

    doi:10.1111/gbi.12174

    authors: Thomazo C,Vennin E,Brayard A,Bour I,Mathieu O,Elmeknassi S,Olivier N,Escarguel G,Bylund KG,Jenks J,Stephen DA,Fara E

    更新日期:2016-05-01 00:00:00

  • Fluidized muds: a novel setting for the generation of biosphere diversity through geologic time.

    abstract::Reworked and fluidized fine-grained deposits in energetic settings are a major modern-day feature of river deltas and estuaries. Similar environments were probably settings for microbial evolution on the early Earth. These sedimentary systems act as efficient biogeochemical reactors with high bacterial phylogenetic di...

    journal_title:Geobiology

    pub_type: 杂志文章,评审

    doi:10.1111/j.1472-4669.2010.00234.x

    authors: Aller JY,Aller RC,Kemp PF,Chistoserdov AY,Madrid VM

    更新日期:2010-06-01 00:00:00

  • Characterisation of the dissimilatory reduction of Fe(III)-oxyhydroxide at the microbe-mineral interface: the application of STXM-XMCD.

    abstract::A combination of scanning transmission X-ray microscopy and X-ray magnetic circular dichroism was used to spatially resolve the distribution of different carbon and iron species associated with Shewanella oneidensis MR-1 cells. S. oneidensis MR-1 couples the reduction of Fe(III)-oxyhydroxides to the oxidation of organ...

    journal_title:Geobiology

    pub_type: 杂志文章

    doi:10.1111/j.1472-4669.2012.00329.x

    authors: Coker VS,Byrne JM,Telling ND,VAN DER Laan G,Lloyd JR,Hitchcock AP,Wang J,Pattrick RA

    更新日期:2012-07-01 00:00:00

  • Physiological and proteomic analyses of Fe(III)-reducing co-cultures of Desulfotomaculum reducens MI-1 and Geobacter sulfurreducens PCA.

    abstract::We established Fe(III)-reducing co-cultures of two species of metal-reducing bacteria, the Gram-positive Desulfotomaculum reducens MI-1 and the Gram-negative Geobacter sulfurreducens PCA. Co-cultures were given pyruvate, a substrate that D. reducens can ferment and use as electron donor for Fe(III) reduction. G. sulfu...

    journal_title:Geobiology

    pub_type: 杂志文章

    doi:10.1111/gbi.12295

    authors: Otwell AE,Callister SJ,Sherwood RW,Zhang S,Goldman AR,Smith RD,Richardson RE

    更新日期:2018-09-01 00:00:00

  • Extreme 15N-enrichments in 2.72-Gyr-old sediments: evidence for a turning point in the nitrogen cycle.

    abstract::Although nitrogen is a key element in organic molecules such as nucleic acids and proteins, the timing of the emergence of its modern biogeochemical cycle is poorly known. Recent studies on the antiquity of the nitrogen cycle and its interaction with free oxygen suggests the establishment of a complete aerobic N bioge...

    journal_title:Geobiology

    pub_type: 杂志文章

    doi:10.1111/j.1472-4669.2011.00271.x

    authors: Thomazo C,Ader M,Philippot P

    更新日期:2011-03-01 00:00:00