Método de amostragem de Bitterlich: uma alternativa de inventário florestal para pequenas propriedades rurais fomentadas

Santos, Jeangelis Silva; Mendonça, Adriano Ribeiro de; Silva, Gilson Fernandes da; Filho, Clayton Vieira Fraga

doi:10.5039/agraria.v11i1a5358

Cited by 7 publications

(9 citation statements)

References 8 publications

(14 reference statements)

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“…Na comparação de métodos de amostragem de área fixa e métodos outros métodos área variável, estudos disponíveis em literaturas pertinentes não relatam diferenças nas estimativas de área basal, volume e número de árvores por hectare. Dentre esses estudos têm-se diferentes fitofisionomias e/ou tipos de floresta, como por exemplo, Floresta Estacional Semidecidual, em Viçosa -MG (FARIAS et al, 2002), Floresta Ombrófila Densa (DIAS e COUTO, 2005), Floresta Ombrófila mista (Nascimento et al, 2015), plantio de Pinus taeda (DRUSZCZ et al, 2010) e plantios de Eucalyptus (SANTOS et al, 2013;SANTOS et al, 2016).…”

Section: Resultsunclassified

Avaliação Do Método De Prodan Na Amostragem De Cerrado Sensu Stricto No Distrito Federal

Oliveira

Costa²,

Lustosa

et al. 2019

Rev. Bras. Biom.

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Este estudo avaliou e comparou os métodos de amostragem de Área Fixa e Prodan em Cerrado sensu stricto no Distrito Federal. Foram distribuídas aleatoriamente dez unidades amostrais na área de estudo, sendo, unidades amostrais de 20 x 50 m para o método de Área Fixa, no centro de cada uma dessas foram demarcados os pontos para amostragem pelo método de Prodan. Em cada unidade as árvores foram identificadas e tiveram o diâmetro na base (Db ≥ 5 cm) e a altura total mensurados. Pelo método de Prodan foram amostradas 39,1% das espécies e 60,7% das famílias botânicas amostradas pelo método de Área Fixa. Espécies amostradas por Prodan foram, em maioria, aquelas com maiores valores de frequência, densidade e dominância relativas obtidas no método de Área Fixa. O número de árvores, área basal e volume por hectare não diferiram entre os dois métodos. O método de Prodan, embora amostre menor número de espécies e famílias botânicas, amostra as espécies mais representativas da fitossociologia. O método de Prodan é tão eficiente quanto o de Área Fixa para estimativas de número de árvores, área basal e volume por hectare.

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Section: Resultsunclassified

Avaliação Do Método De Prodan Na Amostragem De Cerrado Sensu Stricto No Distrito Federal

Oliveira

Costa²,

Lustosa

et al. 2019

Rev. Bras. Biom.

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“…A similar result was obtained in this study because although it did not obtain the best relative efficiency, the Bitterlich method showed less error and greater fidelity to the volume obtained by harvest. Santos et al (2016), comparing the Fixed-Area and Bitterlich methods in Eucalyptus grandis stands emphasizes that both methods did not differ statistically from each other in basal area as well as in volume, thus presenting the equivalence of precision methods. Ubialli et al (2009) in his comparative study of sampling methods and methods to estimate the basal area for groups of species in an ecotonal forest in the north of Mato Grosso observed that the sample units with smaller area obtained a greater real error, compared to the value obtained in the census.…”

Section: Discussionmentioning

confidence: 83%

The Efficiency of Sampling Methods for Dendrometric Estimates of Thinned Stands of Pinus taeda L. in Santa Catarina, Brazil

Farias¹,

Stepka²,

Nicoletti³

et al. 2019

JAS

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This study aimed to compare the efficiency of the sampling methods: Fixed Area, Bitterlich, Prodan and Modified Prodan to estimate the commercial volume and other dendrometric estimators for a 34 years old of Pinus taeda L. stands located in Campo Belo do Sul, Santa Catarina, Brazil. It were distributed a total of 10 sample units of the following methods: Fixed Area with 200, 400 and 500 m² of area, Bitterlich, Prodan and Modified Prodan were distributed, both with 6, 7, 8, 9 and 10 trees. In addition to collecting dendrometric data, the installation time of the sample units was timed, whereby the relative efficiency for each method was calculated. The comparison between the harvest volumes and the volumes estimated by the methods was performed by the Skott Knott test, and the results that did not differ statistically were weighted by the parameters of relative error, relative efficiency and proximity to harvest. All variations of the Modified Prodan and Prodan methods had sample insufficiency. The number of trees per hectare presented higher values for the 200 m² Fixed Area method and lower values for Prodan with 10 trees. Prodan with 6 trees got the shortest time. The Bitterlich method obtained sample adequancy at 10% error and presented the best result. Among the alternative methods to Fixed Area, Modified Prodan with 7 trees can be indicated for pilot inventory. However, when more precise results are needed, the Bitterlich method is indicated.

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“…However, the best methods that estimated the basal area and the number of individuals per hectare may vary according to vegetation type, sampling effort and sampling process. Santos et al (2016) point out that it is critical to use alternative sampling methods in equine plantations, especially when there is an interest to study the horizontal structure of a forest. As an example, Moscovich et al, (1999) concluded that the best method to estimate these variables in an Araucaria Forest is the Strand method, while Druszcz et al (2012) worked on Pinus taeda and verified that the Fixed Area and the Bitterlich method were far better in estimating the number of individuals per hectare and the basal area per hectare, respectively.…”

Section: Discussionmentioning

confidence: 99%

“…Although it presents numerous advantages, particularly in statistical validation, the employment of this method may be economically unattainable for some environmental agencies, companies and research centers. Thus, it is important to evaluate the efficiency of other sampling methods, aiming to reduce the time and cost of performing inventories without loss of precision (Santos et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Comparison of sampling methods for description of floristic-structure in woody vegetation

Lima¹,

Miguel²,

Meira³

et al. 2017

Aust J Crop Sci

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The purpose of the present study was evaluation of the efficiency of the 'Fixed area', Strand, Prodan and Quadrat sampling methods to understand richness, diversity, floristic composition and horizontal structure of natural forest wood species. A census survey was carried out on a cerradão fragment, in which 27 fixed area plots were randomly established with dimensions of 20 × 20 meters. The center of each fixed area plot was considered a sampling point for the alternative methods of sampling, Prodan and Quadrat. For the Strand method, a line was established parallel to one side of the plot cutting it to the center. Richness and diversity of woody species in each method were evaluated by the rarefaction/extrapolation curves using the first three hill numbers. Finally, to characterize the horizontal structure, the Import Value Index percentage (IVI%) and the confidence interval of the basal area and number of individuals per hectare were calculated. The census survey registered a total of 82 species in the cerradão fragment, distributed among 59 genera and 33 botanical families. The study showed that the Fixed Area method was the best survey method regarding the richness, diversity and floristic composition. As for the horizontal structure of the forest, all methods differed, but the Fixed Area and Quadrat methods were the closest to the forestry survey census.

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Método de amostragem de Bitterlich: uma alternativa de inventário florestal para pequenas propriedades rurais fomentadas

Cited by 7 publications

References 8 publications

Avaliação Do Método De Prodan Na Amostragem De Cerrado Sensu Stricto No Distrito Federal

Avaliação Do Método De Prodan Na Amostragem De Cerrado Sensu Stricto No Distrito Federal

The Efficiency of Sampling Methods for Dendrometric Estimates of Thinned Stands of Pinus taeda L. in Santa Catarina, Brazil

Comparison of sampling methods for description of floristic-structure in woody vegetation

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