... microbial group(s) are responsible for a major proportion of the nitrogen fixed globally in symbiosis with higher plants. Evaluation of ecological succession of microbial communities in organic matter decomposition in mangrove plant in the State of São Paulo ... they have high productivity and are known as areas of production and export of organic matter, and also provide shelter, food and location for reproduction of various marine animals. Meso- and macrofauna contribute to organic matter decomposition primarily by__. The fungi which Colonies of bacteria begin the process of decomposition shortly after the death of an organic life form, be it plant, animal or human. Plant litter decomposition is not a purely chemical or physical process, it is basically a biological one resulting from the diverse activities of microorganisms, protozoa and various other soil organisms like insects and worms. Although some studies tend to confirm the dominance of fungi in litter decomposition in situ (Schneider et al. Soil microorganisms are diverse, although they share functions during the decomposition of organic matter. Aerobic composting is a dynamic process in which the work is done by the combined activities of a wide succession of mixed bacteria, actinomycetes, fungi, and other biological populations. Although the decomposition processes of plant residues in rice field soil has been documented, the structure and dynamics of the microbial communities involved are poorly understood. Thus, preferences for soil conditions and litter quality were explored to understand their niche partitioning. The action is essential for the dead matter to be managed. Although the decomposition processes of plant residues in rice field soil has been documented, the structure and dynamics of the microbial communities involved are poorly understood. Process of Decomposition by Microorganisms • Within a very short time period microorganisms can breakdown and digest a large amount of soft tissue, resulting in a large production of gas and ‘decomposition fluid’ • As decomposition proceeds, the skin begins to darken to various shades of green and brown. 2012), others indicate that the role of bacteria in the decay of dead plant biomass is also important (López-Mondéjar et al. 2010). 2016a, b). Microbial decomposer diversity, as well as the compositional variation of decomposer community during decomposition, all affected the decomposition rate (Setälä and Mclean 2004, Dang et al. leaf litter decomposition; reciprocal transplant; bacteria; fungi; elevation gradient; Microbial communities are the engines of decomposition (), a fundamental process regulating the carbon cycle.In ecosystems, microbial decomposition converts detritus into CO 2 and releases nutrients for plant growth. 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