SOIL MICROARTHROPOD COMMUNITY STRUCTURES (MICROARTHROPODA: ORBATIDA, COLLEMBOLA, ACARINA) IN DIFFERENT BIOTOPES AT DONG BO AND TAN THANH VILLAGES OF TRANG XA COMMUNE, VO NHAI DISTRICT, THAI NGUYEN PROVINCE

Abstract

The research conducted in the period from 2015 to 2016, at Dong Bo and Tanthanh villages - Trangxa commune (Vonhai district - Thainguyen province). The results of this research have shown that Oriabatida has the biggest density in some habitats including natural forest, artificial forest, and orchard in wet season, 2015. By contrast, the number of Collembolla stands at the top of the list in dry season in this year. There is a big difference in density of Microarthropoda groups between dry season and wet season. Besides, the densities of Microarthropoda groups in wet season are higher than the figures in the dry season. In 2015, Oribatida and Collembola have a highest difference in density between two seasons.

In wet and dry seasons, 2016, the Oribatida’s density is higher than other groups’ densities in most habitats. By contrast, the density of Acarina stands at the bottom of the list. In all habitats, the change of Oriabatida’s density in artificial forest is biggest and the Oriabatida’s densities in dry season decrease 9 times as much as the figures in wet season. While the densities of all Microarthropoda groups in artificial forest, industrial forest fall over the time, the figure in fruit garden climbs in the period between 2015 and 2016.