of microorganisms and give a definition of what a microorganism is. And a lot of them are actually good for us. Define allochthonously. Originating or formed in a place other than where found: allochthonous rocks; an allochthonous population. Bacteria live almost everywhere, including in our stomachs, dirt, and in your favorite meal. Allochthonous may have some obscure usage related to rocks, but in ecology, allochthonous material is a major concept that underpins thinking about nutrient cycling and food web dynamics.In its most general definition, allochthonous material is something imported into an ecosystem from outside of it. Allochthonous is an antonym of autochthonous. Exceptions exist, however, particularly where colonial animals deposit feces derived from food consumed at a distance from the colony (e.g. Microbiology - Microbiology - Types of microorganisms: The major groups of microorganisms—namely bacteria, archaea, fungi (yeasts and molds), algae, protozoa, and viruses—are summarized below. Within habitats some microorganisms are autochthonous (indigenous), filling the functional niches of the ecosystem, and others are allochthonous (foreign), surviving in the habitat for a period of time but not filling the ecological niches. 1. allochthonous definition: The definition of allochtohonous is a geological term that is rocks that are found in a region that differs from where they were formed. Microorganism definition, any organism too small to be viewed by the unaided eye, as bacteria, protozoa, and some fungi and algae. Allochthonous subsidies influence the biomass of bacteria by providing substrata for chemoorganotrophic bacteria and have an indirect effect on heterotrophic nanoflagellates (HNF) which are the main grazers of bacteria. allochthonously synonyms, allochthonously pronunciation, allochthonously translation, English dictionary definition of allochthonously. Autochthonous microorganisms are primary producers (create own energy, for example, through photosynthesis. Autochthonous is an antonym of allochthonous. 'allochthonous microorganism' přeloženo v bezplatném českém slovníku, mnoho dalších překladů česky The division of microorganisms into beneficial, pathogenic, and neutral based on microbial interactions with their hosts is a part of the widely cited microbiome definition by Lederberg and McCray . 3. adj. See more. Microbiology came into being largely through studies of bacteria. Method By using a large scale, students will be able model the size of specific microorganisms and compare them with the size of a human hair. Allochthonous microorganisms get energy from outside sources. Background The average human hair is 0.1 millimeters Links to the more detailed articles on each of the major groups are provided. bat colonies in caves, seabirds on coastland) - guano is an example of allochthonous organic matter (dead organic material formed outside the ecosystem).