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Registro Completo |
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Biblioteca(s): |
Embrapa Florestas. |
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Data corrente: |
26/09/2006 |
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Data da última atualização: |
28/05/2024 |
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Autoria: |
OKER-BLOM, P.; PUKKALA, T.; KUULUVAINEN, T. |
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Título: |
Relationship between radiation interception and photosynthesis in forest canopies: effect of stand structure and latitude. |
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Ano de publicação: |
1989 |
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Fonte/Imprenta: |
Ecological Modelling, Amsterdam, v. 49, n. 1-2, p .73-88, 1989. |
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Idioma: |
Inglês |
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Conteúdo: |
A simulation model was used to study the interception of radiation and the potential for photosynthesis in structurally different forest stands at latitudes 400 and 600. The stands differed in leaf-area distribution, i.e. horizontally homogeneous canopies or canopies with leaves aggregated into individual crowns. The effect of canopy structure on interception of radiation and photosynthetic potential was studied by simulating variations in leaf area index, stand density and crown size and shape. The relation between accumulated radiation and photosynthesis was never strictly linear. This non-linearity was not very pronounced when averaged over one growing season. The relation was not affected by canopy structure or latitude. The properties of the canopy structure and incoming radiation determined the actual amount of radiation intercepted by the canopy, but the conversion efficiency between intercepted radiation and photosynthesis was rather insensitive to differences in canopy structure and in the properties of incoming radiation. |
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Palavras-Chave: |
Simulation. |
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Thesaurus Nal: |
canopy; light; photosynthesis. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01642naa a2200193 a 4500
001 1278728
005 2024-05-28
008 1989 bl uuuu u00u1 u #d
100 1 $aOKER-BLOM, P.
245 $aRelationship between radiation interception and photosynthesis in forest canopies$beffect of stand structure and latitude.$h[electronic resource]
260 $c1989
520 $aA simulation model was used to study the interception of radiation and the potential for photosynthesis in structurally different forest stands at latitudes 400 and 600. The stands differed in leaf-area distribution, i.e. horizontally homogeneous canopies or canopies with leaves aggregated into individual crowns. The effect of canopy structure on interception of radiation and photosynthetic potential was studied by simulating variations in leaf area index, stand density and crown size and shape. The relation between accumulated radiation and photosynthesis was never strictly linear. This non-linearity was not very pronounced when averaged over one growing season. The relation was not affected by canopy structure or latitude. The properties of the canopy structure and incoming radiation determined the actual amount of radiation intercepted by the canopy, but the conversion efficiency between intercepted radiation and photosynthesis was rather insensitive to differences in canopy structure and in the properties of incoming radiation.
650 $acanopy
650 $alight
650 $aphotosynthesis
653 $aSimulation
700 1 $aPUKKALA, T.
700 1 $aKUULUVAINEN, T.
773 $tEcological Modelling, Amsterdam$gv. 49, n. 1-2, p .73-88, 1989.
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Registro original: |
Embrapa Florestas (CNPF) |
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