A microorganism is a complex biological system able to preserve its functional features against external perturbations and the ability of the living systems to oppose to these external perturbations is defined "robustness".
The selection of soil microorganisms by plants is a complex process controlled by several factors, often not easily correlated to geochemical settings [ 43].
A native relationship with microorganisms is an "in for a penny, in for a pound proposition".
The selection of soil microorganisms by the rhizosphere is a complex process controlled by several factors, often not easily correlated to the environmental settings [ 38].
One of the mechanisms that allow the control of caries is the decrease of dental biofilms, which is a complex hole of microorganisms and metabolic products fixed in a polymeric matrix adhered to the tooth surface.
Biofilm is a complex micro-ecological structure composed of microorganisms and EPS.
The rumen is a complex and dynamic environment where the microorganisms must constantly adapt to changes in diet composition, amount and frequency of feeding.
Fertile soil is a complex system with millions of carbon-sequestering microorganisms per square inch.
Periodontitis is a complex inflammatory response of the human body against microorganisms, which can lead to severe tissue destruction in the oral cavity [ 3].
