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Predicting of biomass in Brazilian tropical dry forest: a statistical evaluation of generic equations Anais da ABC (AABC)
LIMA,ROBSON B. DE; ALVES JÚNIOR,FRANCISCO T.; OLIVEIRA,CINTHIA P. DE; SILVA,JOSÉ A.A. DA; FERREIRA,RINALDO L.C..
ABSTRACT Dry tropical forests are a key component in the global carbon cycle and their biomass estimates depend almost exclusively of fitted equations for multi-species or individual species data. Therefore, a systematic evaluation of statistical models through validation of estimates of aboveground biomass stocks is justifiable. In this study was analyzed the capacity of generic and specific equations obtained from different locations in Mexico and Brazil, to estimate aboveground biomass at multi-species levels and for four different species. Generic equations developed in Mexico and Brazil performed better in estimating tree biomass for multi-species data. For Poincianella bracteosa and Mimosa ophthalmocentra, only the Sampaio and Silva (2005) generic...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Above-ground biomass; Allometric models; Caatinga; Forest management; Statistical validation.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000401815
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Diameter distribution in a Brazilian tropical dry forest domain: predictions for the stand and species Anais da ABC (AABC)
LIMA,ROBSON B. DE; BUFALINO,LINA; ALVES JUNIOR,FRANCISCO T.; SILVA,JOSÉ A.A. DA; FERREIRA,RINALDO L.C..
ABSTRACT Currently, there is a lack of studies on the correct utilization of continuous distributions for dry tropical forests. Therefore, this work aims to investigate the diameter structure of a brazilian tropical dry forest and to select suitable continuous distributions by means of statistic tools for the stand and the main species. Two subsets were randomly selected from 40 plots. Diameter at base height was obtained. The following functions were tested: log-normal; gamma; Weibull 2P and Burr. The best fits were selected by Akaike's information validation criterion. Overall, the diameter distribution of the dry tropical forest was better described by negative exponential curves and positive skewness. The forest studied showed diameter distributions...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Caatinga domain; Continuous distribution; Diameter structure; Forest management; Maximum likelihood.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000301189
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