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Bacterially Induced Mineralization of Calcium Carbonate in Terrestrial Environments: The Role of Exopolysaccharides and Amino Acids
This study stresses the role of specific bacterial outer structures (such as glycocalix and parietal polymers) on calcium carbonate crystallization in terrestrial environments. The aim is to compareExpand
Physical properties of the psammophile cryptogamic crust and their consequences to the water regime of sandy soils, north-western Negev Desert, Israel
The water regime in the sandy dunal area of Nizzana, north-westem Negev Desert, Israel, is highly dependent on a fragile cryptogamic crust only several millimetres thick. This crust develops due toExpand
Needle-fiber Calcite: A Critical Review and a Proposed Classification
ABSTRACT From a review of the recent literature and our own observations, the different morphologies of needle-fiber calcite are classified. They can be characterized as monocrystalline rods (with orExpand
Lacustrine and palustrine carbonate petrography: an overview
Lacustrine limestones were formerly identified by their faunistic (limnea, planorbis) and floristic (Charophytes) content. For 30 years, indications of pedogenesis have been found in many lacustrineExpand
Is the contribution of bacteria to terrestrial carbon budget greatly underestimated?
This study shows that acids such as citrate and oxalate (produced in large amounts by fungi and plants) can rapidly be consumed by these bacteria and highlights the existence of an important and underestimated potential carbon sink. Expand
Freshwater organisms that build stromatolites: a synopsis of biocrystallization by prokaryotic and eukaryotic algae
In freshwater environments such as river and stream bottoms, rocks and submerged vegetation are covered with a biological felt that is susceptible to calcification, knowledge of primary crystals and their diagenetic transformations is necessary to correctly interpret freshwater stromatolites. Expand
Fungi and Sediments
Fungi are saprophytic organisms that can form lichens in symbiosis with an alga. Along with lichens, they excrete large quantities of organic acids, contributing to rock dissolution and neoformationExpand
Monitoring organic matter dynamics in soil profiles by ‘Rock‐Eval pyrolysis’: bulk characterization and quantification of degradation
Summary Rock-Eval pyrolysis was designed for petroleum exploration to determine the type and quality of organic matter in rock samples. Nevertheless, this technique can be used for bulkExpand
Small scale secondary CaCO3 accumulations in selected sections of the European loess belt. Morphological forms and potential for paleoenvironmental reconstruction
Eighteen important Quaternary loess paleosoil sites have been studied across the European loess belt. They included approximately 50 buried soils, the over and/or underlying loess and the present-dayExpand
Microbially mediated carbonate precipitation in a hypersaline lake, Big Pond (Eleuthera, Bahamas)
Microbial metabolism impacts the degree of carbonate saturation by changing the total alkalinity and calcium availability; this can result in the precipitation of carbonate minerals and thus theExpand