Modelagem do crescimento de lemna aequinoctialis Welw. (lemnoideae - araceae)

• Ano de defesa: 2013
• Autor(a) principal: Soares, Joseane Brandão Pires
• Orientador(a): França, Flávio
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Estadual de Feira de Santana
• Programa de Pós-Graduação: Mestrado em Modelagem em Ciência da Terra e do Ambiente
• Departamento: DEPARTAMENTO DE CIÊNCIAS EXATAS
• País: Brasil
• Palavras-chave em Português: Cultivo; curvas de crescimento; macrófitas; modelo computacional; facilitação
• Palavras-chave em Inglês: Cultivation; growth curves; macrophytes; computational model; facilitation
• Área do conhecimento CNPq: CIENCIAS EXATAS E DA TERRA
• Link de acesso: http://localhost:8080/tede/handle/tede/247

The aim of this work was to study the phenomenon of facilitation in the establishment and development of populations of Lemna aequinoctialis Welw .. through the computer model in NetLogo. For both crops were carried out ex situ to establish parameters and variables to be used in developing the model, and study the phenomenon of facilitation between individuals. With the computational model, we sought to test the ideal inoculum for this facilitation in non-axenic. The experiments were performed in pond water and autoclaved without autoclaving in solution Pirson & Siedel, and various concentrations of citrate Lead. Each week to count the number of individuals sprouted. The results were organized in spreadsheet and produced curves were adjusted in the regression model. A comparison of the results was evaluated from the t test with a confidence level of 5%. The results showed that the cultivation lead promotes increased growth rate of Lemna aequinoctialis Welw. That an individual can stay alive up to 70 days in medium without resetting, and that there is facilitation between individuals of the same species for their development in contaminated environments, so there is a minimum amount by which the colonies are established. The computational model describes the behavior of Lemna aequinoctialis Welw. a simulated environment with and without contamination by microorganisms. The hypothesis of facilitation was studied and showed that a single frond of Lemna in non-axenic not developed, two individuals can develop, and the minimum to ensure the establishment and growth is four individuals.