In this research, the evaluation of the influence of earth worm on the soil fauna diversity was studied during each season in making comparison of the density, the abundance and the biomass between Annelida and other inventoried taxa of invertebrates. The results brought out a great density of earth worm in rainy season than the dry one seeing that Oligochaetes are bound at the humidity. The other taxa inventoried were a part of 8 different orders listed according to the importance as follows: Hymenoptera, Araneida, Isoptera, Diplopoda, Coleoptera, Blattoptera, Chilopoda and Thysanoptera. From the 8 orders, the 7 first inventoried during the rainy season were found again during the dry season but with a great density for almost each taxon in spite of the sensitive reduction of the abundance of earth worms. The Chilopoda’s order was observed only during the rainy season, the one of Thysanoptera only during the dry season. In conclusion, the density, the abundance and the biomass of the earth worms of the Miombo forest don’t have influence on the one of other litter fauna invertebrates.

The main objective of this article was the assessment of the impact of damage caused to the MIOMBO clear forest on the diversity of litter fauna. In order to lead to results it was specially selected three different stations (the MIOMBO clear forest, the shrub savannah and the farmed field) those were characterized by the pH, the water content and the organic matter concentration of their soil. The litter fauna species listed on the inventory of the Miombo forest were compared in quality and quantity to those listed in shrub savannah and the land under farming after the calculation of diversity indications. So it was brought out that the acidity and the organic matter concentration were more considerable in the soil of the forest than the shrub savannah and the land under farming. The same goes for the litter fauna that was more abundant and diversified in the forest (to wit the relative abundance of 59, 8%) than the land under farming that has registered 30, 4% of all listed species and the shrub savannah with 9, 8% only. These results constitute the evidence that damages caused to the MIOMBO clear forest has negative actions on the abundance and diversity of the litter fauna.