Temporal stability of stratifications using different dendrometric variables and geostatistical interpolation

Autores/as

DOI:

https://doi.org/10.5902/1980509843274

Palabras clave:

Stratified random sampling, Eucalyptus, Forest inventory, Forest management

Resumen

Stratifying a forest results in more precise and cheaper inventories. This study aimed to select the stratifying variable that estimates more precise and stable inventory over the years for a eucalyptus plantation in Minas Gerais state, Brazil. The continuous forest inventory was performed annually from 2.7 to 6.8 years, and based on the field measurements, arithmetic mean diameter (d), height (h), dominant height (Hdom), basal area (G), volume (V), and mean annual increment in volume (MAI) were calculated. Semivariograms were generated and the exponential, spherical and Gaussian models were fit for each stratifying variable for each measurement date. The models were assessed by the reduced mean error and its deviation, being the exponential model selected. Maps showing the spatial distribution of all variables were generated for each measurement age, using ordinary kriging. Next, the study area was divided in four strata based on each stratifying variable for each measurement age. The stability of each stratifying variables for each measurement age were assessed by: 1) coincident strata area; 2) stability of total strata area; 3) plot permanency on each stratum; and 4) inventory error using stratified random sampling procedures. All variables in all ages presented spatial dependence structure. G and Hdom were the stratifying variables that generated the most and the least coincident strata area over the years, respectively. G and height (h and Hdom) were the stratifying variables yielding the least and most plot stratum changes, respectively. The same trend was observed for the total strata area stability. Stratifying based on MAI and V yielded the smaller inventory error, and h and Hdom yielded the largest. G was selected as the best stratifying variable because it yielded small inventory errors and was the most stable variable in terms of coincident strata area, total strata area and plot stratum changes over the years.

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Biografía del autor/a

Aliny Aparecida dos Reis, Universidade Estadual de Campinas, Campinas, SP

Forestry Engineer, Dr., Postdoctoral Researcher, Núcleo Interdisciplinar de Planejamento Energético, Universidade Estadual de Campinas, Rua Cora Coralina, 330, CEP 13083-896, Campinas (SP), Brazil.

Andressa Ribeiro, Universidade Federal do Piauí, Bom Jesus, PI

Forestry Engineer, Dr., Professor of Universidade Federal do Piauí, Av. Manoel Gracindo, Km 01, CEP 64900-000, Bom Jesus (PI), Brazil.

Rafaella Carvalho Mayrinck, University of Saskatchewan, Saskatoon, SK

Forestry Engineer, Master’s degree, PhD candidate of University of Saskatchewan, Campus Drive, 51, S7N 5A8, Saskatoon (SK), Canada.

José Marcio de Mello, Universidade Federal de Lavras, Lavras, MG

Forestry Engineer, Dr., Professor of Departamento de Ciências Florestais, Universidade Federal de Lavras, Caixa Postal 3037, CEP 37200-900, Lavras (MG), Brasil.

Anderson Pedro Bernardina Batista, Instituto Federal do Amapá, Laranjal do Jari, AP

Forestry Engineer, Dr., Professor of Instituto Federal do Amapá, Rua Nilo Peçanha, 1263, CEP 68920-000, Laranjal do Jari (AP), Brazil.

Antonio Carlos Ferraz Filho, Universidade Federal do Piauí, Bom Jesus, PI

Forestry Engineer, Dr., Professor of Universidade Federal do Piauí, Av. Manoel Gracindo, Km 01, CEP 64900-000, Bom Jesus (PI), Brazil.

Citas

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Publicado

2022-03-25

Cómo citar

Reis, A. A. dos, Ribeiro, A., Mayrinck, R. C., Mello, J. M. de, Batista, A. P. B., & Ferraz Filho, A. C. (2022). Temporal stability of stratifications using different dendrometric variables and geostatistical interpolation. Ciência Florestal, 32(1), 102–121. https://doi.org/10.5902/1980509843274

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