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  <titleInfo>
    <title>Anthropogenic Disturbances Affect the Relationship Between Spectral Indices and the Biometric Variables of Brazilian Savannas</title>
  </titleInfo>
  <name type="personal">
    <namePart>Silveira, Eduarda Martiniano de Oliveira</namePart>
    <role>
      <roleTerm authority="marcrelator" type="text">creator</roleTerm>
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  <name type="personal">
    <namePart>Acerbi Júnior, Fausto Weimar</namePart>
    <role>
      <roleTerm authority="marcrelator" type="text">creator</roleTerm>
    </role>
  </name>
  <name type="personal">
    <namePart>Silva, Sérgio Teixeira</namePart>
    <role>
      <roleTerm authority="marcrelator" type="text">creator</roleTerm>
    </role>
  </name>
  <name type="personal">
    <namePart>Mello, José Márcio de</namePart>
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    </role>
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  <abstract>

ABSTRACT

According to previous studies involving biometric variables modeling using remote sensing (RS),
data did not consider the effects of anthropogenic disturbance as relevant factor. The main objective
of this study was to model aboveground biomass (AGB) and total wood volume (TWV) of Brazilian
Savanna biome using vegetation indices (VI) from LANDSAT 5 TM. Multiple linear regression
(MLR) and random forest (RF) algorithm were applied across 641 field plots of cerrado sensu
stricto of the state of Minas Gerais, Brazil, comparing two models: non-stratified, and stratified
according to plot’s anthropization degree. AGB and TWV obtained from non-anthropized plots
presented linear relation with VIs (R2 = 0.82 and 0.74, respectively) and, on the other hand,
presented nonlinear relation when plots were affected by anthropogenic disturbances or were not
stratified. This finding helps improving estimates by stratifying plots into their anthropization
degree, mainly in the Brazilian Savanna biome undergoing anthropogenic disturbances.

Keywords: remote sensing, stratification, modeling, wood volume, aboveground biomass.</abstract>
  <note>Publicação on-line; 49 ref.; 3 tables; 7 illus.; Summary (En)</note>
  <subject>
    <topic>SENSORIAMENTO REMOTO</topic>
  </subject>
  <subject>
    <topic>MADEIRA</topic>
  </subject>
  <subject>
    <topic>VOLUME</topic>
  </subject>
  <subject>
    <topic>CERRADO</topic>
  </subject>
  <relatedItem type="host">
    <titleInfo>
      <title>Floresta e Ambiente (Brazil)</title>
    </titleInfo>
    <originInfo>
      <publisher>Rio de Janeiro-RJ Instituto de Florestas - UFRRJ 1994</publisher>
    </originInfo>
    <identifier>2025-0451</identifier>
    <identifier type="issn">1415-0980  /  ISSN 2179-8087 0nline</identifier>
    <identifier type="local">BR2026000295</identifier>
    <part>
      <text>v. 26(3) p. 1-13; (2019)</text>
    </part>
  </relatedItem>
  <identifier type="uri">https://www.scielo.br/j/floram/a/WsKrzZDmTttYrxdt9HLm9sF/?format=pdf&amp;lang=en</identifier>
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    <url>https://www.scielo.br/j/floram/a/WsKrzZDmTttYrxdt9HLm9sF/?format=pdf&amp;lang=en</url>
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