Cryptic serpulid-microbialite bioconstructions in the Kakoskali submarine cave (Cyprus, Eastern Mediterranean)

Guido, Adriano; Jiménez, Carlos; Achilleos, Katerina; Rosso, Antonietta; Sanfilippo, Rossana; Hadjioannou, Louis; Petrou, Antonis; Russo, Federico; Mastandrea, Adelaide

doi:10.1007/s10347-017-0502-3

Cited by 27 publications

(25 citation statements)

References 51 publications

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“…Myrow and Coniglio [161], Böhm and Brachert [142], and Cavalazzi et al [128] have interpreted a cryptobiontic lifestyle for the organisms producing Frutexites. Bacterial and fungal communities have been recorded related to Fe-Mn crusts in Pleistocene and modern examples from submarine caves in the Mediterranean [134,162,163], and from reef caves at Lizard Island in Great Barrier Reef [164]. These observations confirm the growth of such Fe-Mn coatings in reduced light conditions.…”

Section: Cryptic Fe-mn Frutexites Crustssupporting

confidence: 54%

Jurassic Non-Carbonate Microbialites from the Betic-Rifian Cordillera (Tethys Western End): Textures, Mineralogy, and Environmental Reconstruction

Reolid

Abad

2019

Minerals

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The term microbialite is commonly applied for describing carbonate organo-sedimentary deposits that have accreted as a result of the activity of benthic microbial communities (BMC). However, non-carbonate microbialites are progressively well-known and show a great diversity of organisms, processes, and mineralogical compositions. This article reviews three types of Jurassic microbialites from four different environmental contexts from the Betic-Rifian Cordillera (South Spain and North Morocco): marine hardgrounds, submarine caves, hydrothermal vents, and submarine volcanic deposits. The Middle-Late Jurassic transition in the External Subbetic (Betic Cordillera) and the Jbel Moussa Group (Rifian Calcareous Chain) was characterized by the fragmentation of the carbonate epicontinental platforms that favored these different settings: (A) Many stratigraphic breaks are recorded as hardgrounds with surficial hydrogenetic Fe crusts and macro-oncoids related to chemo-organotrophic behavior of BMC that served as a specific trap for Fe and Mn enrichment; (B) Cryptic hydrogenetic Fe-Mn crusts (or endostromatolites) grew in the walls of submarine cavities and fractures mainly constituted by Frutexites (chemosynthetic and cryptobiontic microorganism) locally associated to serpulids; (C) Hydrothermal Mn crusts are mainly constituted by different types of filaments and bacillus-shaped bacteria, whose mineralogy and geochemistry point to a submarine hydrothermal origin; (D) Finally, glauconite laminated crusts, constituted by branched cylindrical filaments, have grown in cryptic spaces among the pillow-lava bodies, probably related to the metabolism of chemo-organotrophic microbes under oxic conditions at temperatures between 30 and 90 °C. In most of the cases described in this work, microbial organisms forming microbialites were extremophiles.

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Section: Cryptic Fe-mn Frutexites Crustssupporting

confidence: 54%

Jurassic Non-Carbonate Microbialites from the Betic-Rifian Cordillera (Tethys Western End): Textures, Mineralogy, and Environmental Reconstruction

Reolid

Abad

2019

Minerals

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“…In the last decades, numerous studies have focused on the structure of hard substrate benthic assemblages in cryptic environments such as confined submarine caves [[2], [3], [4], [5], [6], [7], [8], [9]]. Particular attention was given to the bioconstructions formed by the complex interplay of skeletonised organisms (mainly serpulids and bryozoans) and heterotrophic microbial communities [[10], [11], [12], [13], [14], [15], [16], [17], [18], [19]]. Here, we focus on additional micro- and nano-morphological features of the biogenic crusts from two Aegean submarine caves, and highlight the role of endolithic sponges in limiting the development of carbonatogenetic bacteria.…”

Section: Datamentioning

confidence: 99%

Dataset of biogenic crusts from submarine caves of the Aegean Sea: An example of sponges vs microbialites competition in cryptic environments

et al. 2019

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This dataset aims at illustrating the relationships between Metazoa and Bacteria in confined environments. For this purpose, the biotic crusts inside two submarine caves of the Aegean Sea were examined in order to characterize organisms involved in their formation. The present manuscript provides additional data and information to our research article “Composition and biostratinomy of sponge-rich biogenic crusts in submarine caves (Aegean Sea, Eastern Mediterranean)” [1] (Guido et al.). The data were collected with an integrated approach utilizing microfacies observations in optical microscopy and micromorphological and geochemical characterization in electron microscopy (SEM and EPMA). We present here microfacies showing the boundstone framework, which is rich in microcavities partly filled by sponge spicules and scant autochthonous micrite. SEM and EPMA data put in evidence the abundance of sponge spicules inside the crusts and allow discriminating between two types of micrite: detrital micrite and autochthonous micrite. The data presented in this article and those described in Guido et al. [1] allow the evaluation of the relationship between sponges and carbonatogenetic bacteria in the cryptic conditions of submarine caves, and provide new knowledge to interpret the fossil record.

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“…Peloidal to clotted peloidal and aphanitic micrite fills most of the intra-and inter-skeletal cavities contributing to the syndepositional cementation and stabilization of these bioconstructions, see Figure 6. These micrite types were commonly associated with anaerobic bacteria thriving in cryptic cavities characterized by suboxic to anoxic conditions [61][62][63][64][65][66][67][68][69]. Recently, microbial activity, inducing biomineralization processes in modern cryptic environments, was recognized in bioconstructions growing on submarine caves [70][71][72][73][74].…”

Section: The Microbialite In the Erratic Bouldersmentioning

confidence: 99%

Autochthonous Micrite to Aphanodolomite: The Microbialites in the Dolomitization Processes

et al. 2018

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In the present paper, we examine the influence of micrite types, autochthonous or allochthonous, on the dolomitization processes. The recrystallized and dolomitized Carnian samples from Rifugio Vallandro and Alpe di Specie erratic boulders (South Tyrol, Italy) offer a unique example for studying the relationship between microbialites and dolomitization processes. The comparison between the carbonates of the well-preserved erratic boulders of Alpe di Specie and the isochronous, recrystallized, and dolomitized, samples of Rifugio Vallandro, allows for hypothesizing the role of microbialites on dolomitization processes. The Rifugio Vallandro samples represent variously dolomitized boundstone (made of corals, sponges, and peloidal crusts) with a fine texture (aphanodolomite) which contain organic matter relics, suggesting microbial-mediated mineralization. Geomicrobiological characterization of the microbialites from Alpe di Specie indicates that they formed through microbial metabolic activity of sulfate-reducing bacteria, which thrive on organic matter accumulated in the suboxic to anoxic interspaces of the skeletal framework. Similar processes can be hypothesized for the microbialite precursor of Rifugio Vallandro. Extracellular polymeric substance (EPS) and other organic compounds trapped inside the fine crystal matrix can have a role in the dolomitization processes of the microbialites. High pH and high alkalinity, derived from the degradation of organic matter, may be critical in promoting the dolomitization of microbialites because the high pH increases the concentration and activity of the dissolved CO32−, thereby increasing the dolomite supersaturation and reaction rates. This process produces very fine dolomite (aphanodolomite) that replaces the original organic-rich micrite, while the fine crystalline dolomite forming larger euhedral crystals seems to derive from the allochthonous micrite due to the presence of a large amount of siliciclastics and the absence of organic remains.

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Cryptic serpulid-microbialite bioconstructions in the Kakoskali submarine cave (Cyprus, Eastern Mediterranean)

Cited by 27 publications

References 51 publications

Jurassic Non-Carbonate Microbialites from the Betic-Rifian Cordillera (Tethys Western End): Textures, Mineralogy, and Environmental Reconstruction

Jurassic Non-Carbonate Microbialites from the Betic-Rifian Cordillera (Tethys Western End): Textures, Mineralogy, and Environmental Reconstruction

Dataset of biogenic crusts from submarine caves of the Aegean Sea: An example of sponges vs microbialites competition in cryptic environments

Autochthonous Micrite to Aphanodolomite: The Microbialites in the Dolomitization Processes

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