Estudo de indicadores biológicos de recuperação de mata ciliar às margens do Rio das Velhas

• Ano de defesa: 2016
• Autor(a) principal: Andrei Kimura Marcondes de Castro
• Tipo de documento: Tese
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Minas Gerais; Brasil; ICB - DEPARTAMENTO DE BOTÂNICA; Programa de Pós-Graduação em Ecologia, Conservacao e Manejo da Vida Silvestre; UFMG
• Palavras-chave em Português: Fungos micorrízicos arbusculares; Glomalina; Ácido húmico; Alteração do solo; Biomassa microbiana; Estabilização de margens de rio; Ecologia; Recuperação e Remediação Ambiental; Biomarcadores Ambientais; Micorrizas
• Link de acesso: http://hdl.handle.net/1843/48447

With the objective of rehabilitating riparian forest areas on the banks of the Rio das Velhas, with the ultimate aim of controlling erosion, stability and permeability in the face of the flooding factor, a protective vegetation of the slope was implemented. (left bank - Chapter 2) and a flooded riparian forest (right bank - Chapter 3). The evolution of rehabilitation was monitored through the study of physical-chemical and biological indicators. The variables monitored and used as recovery indicators were those related to erosion control and permeability favoring, such as soil humic organic matter content, soil organic matter quality, aggregation and soil porosity. In addition, parameters related to the formation of soil aggregates were studied, such as: soil microbial population with special emphasis on mycorrhizal fungi and their production of glomalin. These variables studied in the experimental area were compared with data obtained from a preserved area and an impacted area adjacent to the experimental area. In the rehabilitation of the slope (Chapter 2) we recorded a significant contribution of soil organic matter and mycorrhizal fungi for aggregation and stabilization of aggregates in the experimental area. Despite the flooding, it was possible to record the role of glomalin in this aggregation process. The flooding in the experimental area did not compromise the stability of the area or the planting, which indicates the success of the rehabilitation procedure and the value of the biotic indicators used in the assessment of recovery. In the rehabilitation of the flooded riparian forest (Chapter 3) it was possible to establish new indicators of forest recovery and stabilization. These indicators were especially related to the quality of the humic organic matter that significantly influenced the process of stabilization and drainage of the riparian forest. Based on these indicators, it was possible to conclude that there was a functional recovery of the forest.