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Biblioteca(s): |
Embrapa Solos. |
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Data corrente: |
08/10/2021 |
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Data da última atualização: |
08/10/2021 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
SILVA, L. F. S. G.; CASTILHO, C. V. de; CAVALCANTE, C. O.; PIMENTEL, T. P.; FEARNSIDE, P. M.; BARBOSA, R. I. |
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Afiliação: |
LUIS FELIPE SANTOS GONÇALVES SILVA, UFRR; CAROLINA VOLKMER DE CASTILHO, CNPS; CLAYMIRDE OLIVEIRA CAVALCANTE, UFRR; TANIA PENA PIMENTEL, INPA; PHILIP M. FEARNSIDE, INPA; REINALDO IMBROZIO BARBOSA, INPA. |
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Título: |
Production and stock of coarse woody debris across a hydro-edaphic gradient of oligotrophic forests in the northern Brazilian Amazon. |
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Ano de publicação: |
2016 |
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Fonte/Imprenta: |
Forest Ecology and Management, v. 364, p. 1-9, Mar. 2016. |
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DOI: |
https://doi.org/10.1016/j.foreco.2015.12.045 |
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Idioma: |
Inglês |
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Conteúdo: |
Most studies on coarse woody debris (CWD) in Brazilian Amazonia have been done in disturbed and undisturbed upland forests. However, oligotrophic forest types occupying seasonal flooding environments have been neglected, although they occupy about one-third of the Amazon region. We examined the effect of an environmental gradient with different hydro-edaphic features on production and stock of CWD in an area of the Rio Negro-Rio Branco basin, in Brazil's state of Roraima. We used 60 km of trails (production) and 30 permanent plots (stock) in a sampling grid established at Viruá National Park. Our study demonstrated that production and stock of CWD carbon are the lowest in all of Amazonia. The highest CWD carbon production was found in open-canopy submontane rainforest (0.58 ± 0.63 MgC ha-1 yr-1), which occur in environments that are free of any influence of seasonal flooding. The lowest stocks of CWD carbon (0.35 ± 0.30 MgC ha-1) was associated with low tree biomass in forest types occurring on sandy soils that are strongly influenced by seasonal flooding. CWD stocks in oligotrophic forests at Viruá are partially explained (~21%) by tree biomass, which is determined by different environmental conditions across hydro-edaphic gradients. Reference values (CWD carbon as a percentage of tree carbon) were among the lowest in Amazonia (0.91-4.38%), with lower values being associated with formations with low production and stock of CWD. This finding suggests that values vary among oligotrophic forest types and that separate reference values should be adopted for estimates of undisturbed forest carbon stocks in the different ecosystems in Brazilian Amazonia. Different reference values represent the variability of CWD among forest types and contribute to reducing uncertainties in current estimates of carbon stock in Amazonia. MenosMost studies on coarse woody debris (CWD) in Brazilian Amazonia have been done in disturbed and undisturbed upland forests. However, oligotrophic forest types occupying seasonal flooding environments have been neglected, although they occupy about one-third of the Amazon region. We examined the effect of an environmental gradient with different hydro-edaphic features on production and stock of CWD in an area of the Rio Negro-Rio Branco basin, in Brazil's state of Roraima. We used 60 km of trails (production) and 30 permanent plots (stock) in a sampling grid established at Viruá National Park. Our study demonstrated that production and stock of CWD carbon are the lowest in all of Amazonia. The highest CWD carbon production was found in open-canopy submontane rainforest (0.58 ± 0.63 MgC ha-1 yr-1), which occur in environments that are free of any influence of seasonal flooding. The lowest stocks of CWD carbon (0.35 ± 0.30 MgC ha-1) was associated with low tree biomass in forest types occurring on sandy soils that are strongly influenced by seasonal flooding. CWD stocks in oligotrophic forests at Viruá are partially explained (~21%) by tree biomass, which is determined by different environmental conditions across hydro-edaphic gradients. Reference values (CWD carbon as a percentage of tree carbon) were among the lowest in Amazonia (0.91-4.38%), with lower values being associated with formations with low production and stock of CWD. This finding suggests that values vary among o... Mostrar Tudo |
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Palavras-Chave: |
Dead biomass; Hydro-edaphic determinants; Oligotrophic forests. |
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Thesaurus Nal: |
Necromass. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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Marc: |
LEADER 02659naa a2200241 a 4500
001 2135223
005 2021-10-08
008 2016 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1016/j.foreco.2015.12.045$2DOI
100 1 $aSILVA, L. F. S. G.
245 $aProduction and stock of coarse woody debris across a hydro-edaphic gradient of oligotrophic forests in the northern Brazilian Amazon.$h[electronic resource]
260 $c2016
520 $aMost studies on coarse woody debris (CWD) in Brazilian Amazonia have been done in disturbed and undisturbed upland forests. However, oligotrophic forest types occupying seasonal flooding environments have been neglected, although they occupy about one-third of the Amazon region. We examined the effect of an environmental gradient with different hydro-edaphic features on production and stock of CWD in an area of the Rio Negro-Rio Branco basin, in Brazil's state of Roraima. We used 60 km of trails (production) and 30 permanent plots (stock) in a sampling grid established at Viruá National Park. Our study demonstrated that production and stock of CWD carbon are the lowest in all of Amazonia. The highest CWD carbon production was found in open-canopy submontane rainforest (0.58 ± 0.63 MgC ha-1 yr-1), which occur in environments that are free of any influence of seasonal flooding. The lowest stocks of CWD carbon (0.35 ± 0.30 MgC ha-1) was associated with low tree biomass in forest types occurring on sandy soils that are strongly influenced by seasonal flooding. CWD stocks in oligotrophic forests at Viruá are partially explained (~21%) by tree biomass, which is determined by different environmental conditions across hydro-edaphic gradients. Reference values (CWD carbon as a percentage of tree carbon) were among the lowest in Amazonia (0.91-4.38%), with lower values being associated with formations with low production and stock of CWD. This finding suggests that values vary among oligotrophic forest types and that separate reference values should be adopted for estimates of undisturbed forest carbon stocks in the different ecosystems in Brazilian Amazonia. Different reference values represent the variability of CWD among forest types and contribute to reducing uncertainties in current estimates of carbon stock in Amazonia.
650 $aNecromass
653 $aDead biomass
653 $aHydro-edaphic determinants
653 $aOligotrophic forests
700 1 $aCASTILHO, C. V. de
700 1 $aCAVALCANTE, C. O.
700 1 $aPIMENTEL, T. P.
700 1 $aFEARNSIDE, P. M.
700 1 $aBARBOSA, R. I.
773 $tForest Ecology and Management$gv. 364, p. 1-9, Mar. 2016.
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