Características populacionais da Classe Collembola (Arthropoda: hexapoda) no perfil do solo em cinco ambientes na região de Dourados-MS

Abstract

The objective of this study was to verify the composition and the dynamics of the populations of Collembola Class's organisms as bioindicators of environmental impacts, through the comparison of soil samples in natural systems and agroecosystems, and to infer on its roles about the operation and the sustentability of the cultivation systems. The material of this study was removed from five different treatments located at Experimental Farm of Universidade Federal da grande Dourados (UFGD) and at Mata do Azulão (Fazenda Coqueiro): irrigated notillage, non irrigated no-till, irrigated conventional tillage, non irrigated conventional tillage, and natural forests, in five depths of the soil profile for each sampled local. 108 individuals divided in 6 families were obtained. The natural forests registered a decreasing effect in number of individuals from the first to the last sampled layer. In irrigated no-tillage area and natural forests it was obtained the largest mean number of organisms, followed by the non irrigated no-till area. The representatives of the Isotomidae and Entomobryidae families were the mostcounted in these systems. The Isotomidae familie had an increased number of found individuals from the first to the last sampled time.