Microbial communities can adapt to and colonize all kinds of habitat, owing to their metabolic versatility. They occur in abyssal oceanic situations, in polar ice caps, also in thermal springs, lakes, rivers, deserts and on carbonate (karst) platform systems.
Under favourable conditions, the microbial communities can proliferate and contribute to the construction of monumental edifices, termed microbialites2. They can do this in marine environments or in terrestrial settings. These structures are composed of mixed organic and sedimentary material resulting from the interaction between prokaryote organisms (bacteria, cyanobacteria) or eukaryotes (particularly algae and fungi), or both, with sedimentary processes and physico-chemical parameters of the particular environment. Marine microbialite morphology is extremely varied, in the form of mat-like accumulations, veils, domes, pompons shapes, clumps, or viscous masses.
The proliferation of microbialites in present-day environments, whether or not under the pressure of human activity, appears very recent (emerging over the past 20 years). It usually coincides with a creeping decay of coral community, a trend now seen in most regions of the world. This process is causing great concern, particularly so because the microbial structures grow rapidly and some of the cyanobacterial species involved are potentially toxic. Such changes could stem from recent modifications in environmental and climatic conditions (regional or local-scale). These could be natural or induced by human activity. Scientists are therefore looking into the significance that should be attached to these microbial structures as indicators of environmental climatic disturbances.
Marie-Lise Sabrie | alfa
Invasive Insects Cost the World Billions Per Year
04.10.2016 | University of Adelaide
Malaysia's unique freshwater mussels in danger
27.09.2016 | The University of Nottingham Malaysia Campus
Ultrafast lasers have introduced new possibilities in engraving ultrafine structures, and scientists are now also investigating how to use them to etch microstructures into thin glass. There are possible applications in analytics (lab on a chip) and especially in electronics and the consumer sector, where great interest has been shown.
This new method was born of a surprising phenomenon: irradiating glass in a particular way with an ultrafast laser has the effect of making the glass up to a...
Terahertz excitation of selected crystal vibrations leads to an effective magnetic field that drives coherent spin motion
Controlling functional properties by light is one of the grand goals in modern condensed matter physics and materials science. A new study now demonstrates how...
Researchers from the Institute for Quantum Computing (IQC) at the University of Waterloo led the development of a new extensible wiring technique capable of controlling superconducting quantum bits, representing a significant step towards to the realization of a scalable quantum computer.
"The quantum socket is a wiring method that uses three-dimensional wires based on spring-loaded pins to address individual qubits," said Jeremy Béjanin, a PhD...
In a paper in Scientific Reports, a research team at Worcester Polytechnic Institute describes a novel light-activated phenomenon that could become the basis for applications as diverse as microscopic robotic grippers and more efficient solar cells.
A research team at Worcester Polytechnic Institute (WPI) has developed a revolutionary, light-activated semiconductor nanocomposite material that can be used...
By forcefully embedding two silicon atoms in a diamond matrix, Sandia researchers have demonstrated for the first time on a single chip all the components needed to create a quantum bridge to link quantum computers together.
"People have already built small quantum computers," says Sandia researcher Ryan Camacho. "Maybe the first useful one won't be a single giant quantum computer...
14.10.2016 | Event News
14.10.2016 | Event News
12.10.2016 | Event News
27.10.2016 | Materials Sciences
27.10.2016 | Physics and Astronomy
27.10.2016 | Life Sciences