"Prokaryotes (including Bacteria and Archaea) are an important component of the planktonic community of aquatic ecosystems and a critical link in the microbial loop, playing a vital role in nutrient cycling and food-web structure within the marine environment. Particularly, heterotrophic microorganisms (bacteria, fungi) are the main consumers of Dissolved Organic Matter (DOM) and therefore they are the major players in organic matter turnover within the âmicrobial loopâ. Thanks to their wide biodiversity and their large variety of metabolic activities, microorganisms contribute significantly to the regulation of the flux of organic matter and energy from the biotic to abiotic compartments, acting in both decomposition (by DOM hydrolysis and nutrient release) and production processes (new living biomass production). Enzymatic hydrolysis of organic matter, which is mostly composed of both dissolved and particulate polymers, is recognized as a critical process and a âbottleneckâ for organic matter utilization. In fact, heterotrophic microorganisms may uptake directly only low molecular weight substrates, such as aminoacids, simple sugars, fatty acids. Many microorganisms, such as heterotrophic bacteria, microalgae, cyanobacteria, fungi and yeasts, are able to synthesize enzymes. Therefore, the determination of enzymatic hydrolysis rates allows to quantify the contribution of the microbial community to organic matter turnover.
Scholarly journal is a peer-reviewed journal in which scholarship relating to a particular academic discipline is published. Scholarly journals serve as forums for the introduction and presentation for scrutiny of new research, and the critique of existing research. Content typically takes the form of articles presenting original research, review articles, and book reviews. The term Scholarly journal applies to scholarly publications in all fields; this article discusses the aspects common to all academic field journals
Last date updated on July, 2014