Stable carbon and oxygen isotope signatures of pedogenic needle fibre calcite

Millière, Laure; Hasinger, Olivier; Bindschedler, Saskia; Cailleau, Guillaume; Spangenberg, Jorge E.; Verrecchia, Éric P.

doi:10.1016/j.geoderma.2010.12.009

Cited by 37 publications

(17 citation statements)

References 62 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The analysis may be performed on a bulk sample by an "extraction-analysis" approach which is then most likely a mixture of several phases, as experienced in our own observations with NFC and nanofibres [91,105]. By this method, the presence of a given organic biomarker may indicate the presence of an organism or a metabolism (depending on the nature of the biomarker) but it does not necessarily indicate an implication of the targeted organism in the crystal genesis [117][118][119].…”

Section: Methodological Issues In the Study Of Fungal Biominerals Fromentioning

confidence: 99%

“…In order to discuss this aspect, we choose to present our own experience with a typical example of secondary CaCO 3 crystals attributed to fungal activity but still under debate! These minerals are known as needle fibre calcite (NFC) and their associated nanofibres ( [103] and references therein; [14] and references from their Table 1; [90][91][92]104,105]). Both features are distinct micro-to nano-crystalline shapes of calcite crystals [14] (Figure 6).…”

Section: Fungal Caco 3 In the Natural Environmentmentioning

confidence: 99%

See 1 more Smart Citation

Role of Fungi in the Biomineralization of Calcite

2016

Self Cite

View full text Add to dashboard Cite

Abstract:In the field of microbial biomineralization, much of the scientific attention is focused on processes carried out by prokaryotes, in particular bacteria, even though fungi are also known to be involved in biogeochemical cycles in numerous ways. They are traditionally recognized as key players in organic matter recycling, as nutrient suppliers via mineral weathering, as well as large producers of organic acids such as oxalic acid for instance, an activity leading to the genesis of various metal complexes such as metal-oxalate. Their implications in the transformation of various mineral and metallic compounds has been widely acknowledged during the last decade, however, currently, their contribution to the genesis of a common biomineral, calcite, needs to be more thoroughly documented. Calcite is observed in many ecosystems and plays an essential role in the biogeochemical cycles of both carbon (C) and calcium (Ca). It may be physicochemical or biogenic in origin and numerous organisms have been recognized to control or induce its biomineralization. While fungi have often been suspected of being involved in this process in terrestrial environments, only scarce information supports this hypothesis in natural settings. As a result, calcite biomineralization by microbes is still largely attributed to bacteria at present. However, in some terrestrial environments there are particular calcitic habits that have been described as being fungal in origin. In addition to this, several studies dealing with axenic cultures of fungi have demonstrated the ability of fungi to produce calcite. Examples of fungal biomineralization range from induced to organomineralization processes. More examples of calcite biomineralization related to direct fungal activity, or at least to their presence, have been described within the last decade. However, the peculiar mechanisms leading to calcite biomineralization by fungi remain incompletely understood and more research is necessary, posing new exciting questions linked to microbial biomineralization processes.

show abstract

Section: Methodological Issues In the Study Of Fungal Biominerals Fromentioning

confidence: 99%

Section: Fungal Caco 3 In the Natural Environmentmentioning

confidence: 99%

Role of Fungi in the Biomineralization of Calcite

2016

Self Cite

View full text Add to dashboard Cite

show abstract

“…Due to the fact that nanofibres are observed in the presence of NFC, which is thought to be the result of fungal biomineralization (Callot et al, 1985a;Phillips and Self, 1987;Ould Mohamed and Bruand, 1994;Verrecchia and Verrecchia, 1994;Cailleau et al, 2009b;Bindschedler et al, 2010Bindschedler et al, , 2012Millière et al, 2011a), this paper will focus on the description on the fungal cell wall rather that the plant cell wall. However, it must be pointed out that as both types of organisms have a fibrous component within their cell wall, the conclusion drawn for organic nanofibres of fungal origin could also be valid for organic nanofibres of plant origin.…”

Section: Involvement Of An Organic Templatementioning

confidence: 99%

Unravelling the enigmatic origin of calcitic nanofibres in soils and caves: purely physicochemical or biogenic processes?

et al. 2014

View full text Add to dashboard Cite

Abstract. Calcitic nanofibres are ubiquitous habits of secondary calcium carbonate (CaCO 3 ) accumulations observed in calcareous vadose environments. Despite their widespread occurrence, the origin of these nanofeatures remains enigmatic. Three possible mechanisms fuel the debate: (i) purely physicochemical processes, (ii) mineralization of rod-shaped bacteria, and (iii) crystal precipitation on organic templates. Nanofibres can be either mineral (calcitic) or organic in nature. They are very often observed in association with needle fibre calcite (NFC), another typical secondary CaCO 3 habit in terrestrial environments. This association has contributed to some confusion between both habits, however they are truly two distinct calcitic features and their recurrent association is likely to be an important fact to help understanding the origin of nanofibres. In this paper the different hypotheses that currently exist to explain the origin of calcitic nanofibres are critically reviewed. In addition to this, a new hypothesis for the origin of nanofibres is proposed based on the fact that current knowledge attributes a fungal origin to NFC. As this feature and nanofibres are recurrently observed together, a possible fungal origin for nanofibres which are associated with NFC is investigated. Sequential enzymatic digestion of the fungal cell wall of selected fungal species demonstrates that the fungal cell wall can be a source of organic nanofibres. The obtained organic nanofibres show a striking morphological resemblance when compared to their natural counterparts, emphasizing a fungal origin for part of the organic nanofibres observed in association with NFC. It is further hypothesized that these organic nanofibres may act as templates for calcite nucleation in a biologically influenced mineralization process, generating calcitic nanofibres. This highlights the possible involvement of fungi in CaCO 3 biomineralization processes, a role still poorly documented. Moreover, on a global scale, the organomineralization of organic nanofibres into calcitic nanofibres might be an overlooked process deserving more attention to specify its impact on the biogeochemical cycles of both Ca and C.

show abstract

“…spring carbonates, speleothems besides tree rings, pollen) in the same region can be combined. The effect of early diagenetic processes on stable and radiogenic isotope and trace element geochemical signals in non-marine paleoclimatic carbonate records remains a critical, though delicate, point (Andrews, 2006;Fairchild et al, 2006;Martín-García et al, 2009;Milliere et al, 2011;Millière et al, 2011;Wassenburg et al, 2012;Zhang et al, 2014). Only seldom the effect of a single diagenetic process on different stable and radiogenic isotope and trace elemental proxies is investigated in field samples or lab precipitates (Martín-García et al, 2009;Domínguez-Villar et al, 2017), nor are the cumulative effects of successive diagenetic transformation processes (Scholz et al, 2014;Ritter et al, 2017).…”

mentioning

confidence: 99%

What do we really know about early diagenesis of non-marine carbonates?

Boever

Brasier

Foubert

et al. 2017

Sedimentary Geology

View full text Add to dashboard Cite

Non-marine carbonate rocks including cave, spring, stream, calcrete and lacustrine-palustrine sediments, are susceptible to early diagenetic processes. These can profoundly alter the carbonate fabric and affect paleoclimatic proxies. This review integrates recent insights into diagenesis of non-marine carbonates and in particular the variety of early diagenetic processes, and presents a conceptual framework to address them. With ability to study at smaller and smaller scales, down to nanometers, one can now observe diagenesis taking place the moment initial precipitates have formed, and continuing thereafter. Diagenesis may affect whole rocks, but it typically starts in nano-and micro-environments. The potential for diagenetic alteration depends on the reactivity of the initial precipitate, commonly being metastable phases like vaterite, Ca-oxalates, hydrous Mg-carbonates and aragonite with regard to the ambient fluid. Furthermore, organic compounds commonly play a crucial role in hosting these early transformations. Processes like neomorphism (inversion and recrystallization), cementation and replacement generally result in an overall coarsening of the fabric and homogenization of the wide range of complex, primary microtextures. If early diagenetic modifications are completed in a short time span compared to the (annual to millennial) time scale of interest, then recorded paleoenvironmental signals and trends could still acceptably reflect original, depositional conditions. However, even compact, non-marine carbonate deposits may behave locally and temporarily as open systems to crystal-fluid exchange and overprinting of one or more geochemical proxies is not unexpected. Looking to the future, relatively few studies have examined the behaviour of promising geochemical records, such as clumped isotope thermometry and (non-conventional) stable isotopes, in well-constrained diagenetic settings. Ongoing and future in-vitro and in-situ experimental approaches will help to investigate and detangle sequences of intermediate, diagenetic products, processes and controls, and to quantify rates of early diagenesis, bridging a gap between nanoscale, molecular lab studies and the fossil field rock record of non-marine carbonates.

show abstract

Stable carbon and oxygen isotope signatures of pedogenic needle fibre calcite

Cited by 37 publications

References 62 publications

Role of Fungi in the Biomineralization of Calcite

Role of Fungi in the Biomineralization of Calcite

Unravelling the enigmatic origin of calcitic nanofibres in soils and caves: purely physicochemical or biogenic processes?

What do we really know about early diagenesis of non-marine carbonates?

Contact Info

Product

Resources

About