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Title: Definição do tamanho de unidades amostrais para florestas nativas
Other Titles: Definition of sample units for native forests
Authors: Mello, José Márcio de
Mello, José Márcio de
Calegário, Natalino
Assis, Adriana Leandra de
Keywords: Parcela
Inventário florestal
Área basal
Floresta estacional decidual
Floresta estacional semidecidual
Great plot size
Sampling unit
Forest inventory
Carbon stock
Basal area
Decidual seasonal forest
Seasonal semidecidual forest
Issue Date: 23-Apr-2019
Publisher: Universidade Federal de Lavras
Citation: PINTO, L. O. R. Definição do tamanho de unidades amostrais para florestas nativas. 2019. 72 p. Dissertação (Mestrado em Engenharia Florestal)–Universidade Federal de Lavras, Lavras, 2019.
Abstract: The forest inventories allow to know the ecological structure of the forest and provide important information for forestry activities, such as volumetric, floristic and biomass. A relevant stage in the execution of the inventory is the definition of the sample unit size. In dealing with forest surveys of native vegetation, the shape, size, and interval between sample units are a big question. In this context, the objective of this work was to estimate the optimum size of plots for the inventory in four phytophysiognomies, Cerrado sensu stricto, Cerradão, Deciduous Mesophytic Forest and Semideciduous Mesophytic Forest, based on basal area and carbon stock, taking into account the behavior of floristic structure and inventory results. Data from the Forest Inventory of Minas Gerais were used, with plot areas ranging from 100 to 2000m². For the evaluation of the estimates, the variables basal area and above ground biomass (carbon stock) were used. The estimates of the optimal plot size were based on four different methodologies, according to Smith's Empirical Law, Modified Maximum Curvature, Reason Quotient Method and Segmented Linear Model with plateau response. All evaluated methods presented good estimates of plot size for native forest inventory. When evaluated the different sizes of plots defined by the methods, the structural standards and floristic similarity were similar. Based on the inventory processing and ecological relationships, the definition of sample unit size was based on biomass. It was defined 600m² for Deciduous Mesophytic Forest, Cerrado and Cerradão and 1000m² for Semideciduous Mesophytic Forest. Thus this research was able to aggregate accurate information on the optimal size of plots, contributing to the optimization of financial resources and time spent in fieldwork.
Appears in Collections:Engenharia Florestal - Mestrado (Dissertações)

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