The litter, from stratum épigée, can be totally decomposed under the effect of the microbial enzymes. She can also, beforehand, be split up by the microfauna(microcrowd), the result(profit) of the digestion of the ingested parts(parties) being restored to the ground in the form of faecal balls the mineral or organic constituents of which can be of use as food to another category of bodies. These successive reactions of catabolism and anabolism will end in a total mineralization of the organic matter, the new substances so trained(formed), together with the products of the photosynthesis, allowing the development plants essential to the preservation of life on earth.

Bacteria, Actinomycètes, Mushrooms and some animal groupings (Oligochètes, Isopodes, Collemboles, Nematodes, ...) are concerned by this decomposition. The consumers bacteriophages come then (Protozoons, Rotifères, Nématodes, ...), mycophages (Collemboles, Enchytréides, Nématodes, Oribates), phycophages (Nématodes), plant-eating (Nématodes, Beetles, Mollusks), then the predators (Enchytréides, Nématodes, Rotifères, Planaires, Mollusks, Arachnids). The ground, the real ecological jungle, is an alive energy system is where all the possible interactions between sorts(species) or populations and at every level trophiques are represented: symbiosis, parasitism, competition. Every type(chap) of ground offers different energy potentialities which are translated by modifications of the flora and the fauna(crowd). Etant was given this diversity, we shall content with studying one of these circles: a forest rendzine, and to look for the location(localization) and the distribution of the bodies of the ground according to trophiques sources(springs).

-Importance of Microarthropodes

Species:  Pseudomonas syringae

sources:
- https://www.gktoday.in/gk/ice-minus-bacteria/
- https://www.popsci.com/heres-how-bacteria-freeze-water-around-them
-http://bioweb.uwlax.edu/bio203/s2008/campbell_rach/classification.htm

-   P. syringae has the capability to grow in a wide range of environments and ecosystems gives this species of bacteria the potential to drastically impact biogeographical systems.

- It has been used in meteorology to refer to the nucleation of ice by bacteria in clouds resulting in snow or rainfall.

-          Pseudomonas syringae have a significant impact on weather systems and ecosystems worldwide. 

-          P. syringae also has an extraordinary ice nucleation activity which allows this species to catalyze freezing water at warm temperatures which sparked interest in its role in the water cycle. 
-  This bacterium causes water vapor to freeze to a large enough size for gravity to act on the droplets in clouds which causes precipitation such as snow or rain. This is important because organisms such as bacteria that can drive our precipitation patterns, due to cloud formation, of any given area can be vital in predicting weather patterns.

 

-          Morris et al. 2008. The life history of the plant pathogen Pseudomonas syringae is linked to the water cycle. The ISME Journal Vol. 2: 321–334 http://www.nature.com/ismej/journal/v2/n3/full/ismej2007113a.html

-          Maki et al. 1974. Ice Nucleation induced by Pseudomonas syringae. American Society for Microbiology Vol. 28, No. 3: 456-459. http://aem.asm.org/content/28/3/456.full.pdf+html

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