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| Author(s): |
Emiliano Brandão Azevedo
Total Authors: 1
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| Document type: | Master's Dissertation |
| Press: | Jaboticabal. 2017-04-26. |
| Institution: | Universidade Estadual Paulista (Unesp). Faculdade de Ciências Agrárias e Veterinárias. Jaboticabal |
| Defense date: | 2017-02-24 |
| Advisor: | Raphael de Campos Castilho; Renato de Almeida Sarmento |
| Abstract | |
Knowledge about soil mite fauna in the various biomes of Brazil is incipient, and in some locations there are no studies, such as the state of Tocantins. One of the groups most commonly found in soils is Mesostigmata, known as potential natural enemies of many phytophagous organisms harmful to agriculture. The aim of this study is to determine the diversity of the major groups of edaphic Mesostigmata in crops and in the natural vegetation in the Cerrado biome of the state of Tocantins. Litter and soil samples went collected monthly, during one year, a Cerrado region in the Sucupira, state of Tocantins. Samples were done in four different areas, area of natural vegetation, soybean plantation, eucalyptus plantation and a pasture. In each of these areas 16 sampling points were randomly selected. At each point, a sample was collected from the litter and a sample in the underlying soil layer (0-5 cm deep). In the laboratory, the mites were extracted from the samples by using a modified Berlese-Tulgren funnel. The extracted material examined and Mesostigmata mites were mounted on microscopic slides. The Mesostigmata specimens will be separated into morphospecies and identified, where possible, at the species level. The mite community of each region was subjected to multivariate data analysis, Jaccard and Euclidian grouping methods. The results showed that the higher abundance was found in the natural vegetation, followed by eucalyptus, soybean and pasture. In the of natural vegetation of the family Rhodacaridae, while the production areas have higher abundance for Ascidae. It was also observed that the population dynamics of mites has positive and negative interaction with the rainfall. The morphospecies found in the natural vegetation moved away from the sites of the species found in the cultivated areas when analyzed by quantitative and qualitative methods. The results of this work can be the basis of future studies of the application of mites to the cropping systems using predatory mites. In addition, this is the first work done in relation to edaphic fauna in the state of Tocantins. (AU) | |
| FAPESP's process: | 15/14400-6 - Diversity of edaphic mites, with emphasis on mesostigmata, on crops and natural vegetation in the cerrado biome in state of Tocantins |
| Grantee: | Emiliano Brandão de Azevedo |
| Support Opportunities: | Scholarships in Brazil - Master |