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 | Acesso ao texto completo restrito à biblioteca da Embrapa Florestas. Para informações adicionais entre em contato com cnpf.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Florestas. |
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Data corrente: |
03/08/2021 |
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Data da última atualização: |
10/01/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
LIEBSCH, D.; MARCILIO-SILVA, V.; MARCON, A. K.; GALVÃO, F.; MIKICH, S. B.; MARQUES, M. C. M. |
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Afiliação: |
DIETER LIEBSCH, UFPR; VINICIUS MARCILIO-SILVA, UFPR; AMANDA K. MARCON, UFPR; FRANKLIN GALVÃO, UFPR; SANDRA BOS MIKICH, CNPF; MÁRCIA CRISTINA MENDES MARQUES, UFPR. |
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Título: |
How do trees survive a cyclone?: the relative role of individual and site characteristics over mortality. |
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Ano de publicação: |
2021 |
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Fonte/Imprenta: |
Austral Ecology, v. 46, n. 8, p. 1356-1365, Dec. 2021. |
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DOI: |
10.1111/aec.13088 |
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Idioma: |
Inglês |
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Conteúdo: |
Cyclones are an increasing disturbance in the subtropical region of South America, but their impacts over the forests are still poorly documented. Here, we evaluate the effects of an extratropical cyclone over tree mortality in Araucaria Forest remnants in southern Brazil. We surveyed 116 sites (10 × 20 m each) and col- lected data on all tree individuals presenting DBH ? 4.8 cm before (2009) and after (2014) the occurrence of an extratropical cyclone. Using GLM models, we checked how the cyclone occurrence, different plant traits (DBH, trunk branching, wood density, successional group and evolutionary distinctiveness) and site characteristics (basal area, exposure, landscape protection, nearest border distance, cyclone border distance and the presence of native bamboo species) could impact tree mortality. The GLM model selection shows that the lowest AIC model considers all predictors separately and their interaction with the cyclone. The results showed that the cyclone occurrence and some site characteristics (bamboo presence, site exposure, landscape protection, nearest border distance and cyclone border distance) and plant traits (successional group and evolutionary distinctiveness) are related to tree mortality. The intense deforestation and fragmentation of the Araucaria Forest coupled with the increase in cyclone frequency expected for the region due to climate change may increase mortality rates of these forests, affecting their resilience and phylogenetic structure. Further biodiversity conservation efforts in the Arau- caria Forest need to consider the characteristics of sites for enabling the protection of forest remnants in areas under different exposures to cyclone impacts. MenosCyclones are an increasing disturbance in the subtropical region of South America, but their impacts over the forests are still poorly documented. Here, we evaluate the effects of an extratropical cyclone over tree mortality in Araucaria Forest remnants in southern Brazil. We surveyed 116 sites (10 × 20 m each) and col- lected data on all tree individuals presenting DBH ? 4.8 cm before (2009) and after (2014) the occurrence of an extratropical cyclone. Using GLM models, we checked how the cyclone occurrence, different plant traits (DBH, trunk branching, wood density, successional group and evolutionary distinctiveness) and site characteristics (basal area, exposure, landscape protection, nearest border distance, cyclone border distance and the presence of native bamboo species) could impact tree mortality. The GLM model selection shows that the lowest AIC model considers all predictors separately and their interaction with the cyclone. The results showed that the cyclone occurrence and some site characteristics (bamboo presence, site exposure, landscape protection, nearest border distance and cyclone border distance) and plant traits (successional group and evolutionary distinctiveness) are related to tree mortality. The intense deforestation and fragmentation of the Araucaria Forest coupled with the increase in cyclone frequency expected for the region due to climate change may increase mortality rates of these forests, affecting their resilience and phylogenetic structure.... Mostrar Tudo |
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Palavras-Chave: |
Araucaria Forest; Disturbance; Extratropical; Floresta com araucária; Trait. |
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Thesaurus Nal: |
Mortality. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02495naa a2200265 a 4500
001 2133191
005 2022-01-10
008 2021 bl uuuu u00u1 u #d
024 7 $a10.1111/aec.13088$2DOI
100 1 $aLIEBSCH, D.
245 $aHow do trees survive a cyclone?$bthe relative role of individual and site characteristics over mortality.$h[electronic resource]
260 $c2021
520 $aCyclones are an increasing disturbance in the subtropical region of South America, but their impacts over the forests are still poorly documented. Here, we evaluate the effects of an extratropical cyclone over tree mortality in Araucaria Forest remnants in southern Brazil. We surveyed 116 sites (10 × 20 m each) and col- lected data on all tree individuals presenting DBH ? 4.8 cm before (2009) and after (2014) the occurrence of an extratropical cyclone. Using GLM models, we checked how the cyclone occurrence, different plant traits (DBH, trunk branching, wood density, successional group and evolutionary distinctiveness) and site characteristics (basal area, exposure, landscape protection, nearest border distance, cyclone border distance and the presence of native bamboo species) could impact tree mortality. The GLM model selection shows that the lowest AIC model considers all predictors separately and their interaction with the cyclone. The results showed that the cyclone occurrence and some site characteristics (bamboo presence, site exposure, landscape protection, nearest border distance and cyclone border distance) and plant traits (successional group and evolutionary distinctiveness) are related to tree mortality. The intense deforestation and fragmentation of the Araucaria Forest coupled with the increase in cyclone frequency expected for the region due to climate change may increase mortality rates of these forests, affecting their resilience and phylogenetic structure. Further biodiversity conservation efforts in the Arau- caria Forest need to consider the characteristics of sites for enabling the protection of forest remnants in areas under different exposures to cyclone impacts.
650 $aMortality
653 $aAraucaria Forest
653 $aDisturbance
653 $aExtratropical
653 $aFloresta com araucária
653 $aTrait
700 1 $aMARCILIO-SILVA, V.
700 1 $aMARCON, A. K.
700 1 $aGALVÃO, F.
700 1 $aMIKICH, S. B.
700 1 $aMARQUES, M. C. M.
773 $tAustral Ecology$gv. 46, n. 8, p. 1356-1365, Dec. 2021.
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Registro original: |
Embrapa Florestas (CNPF) |
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| Acesso ao texto completo restrito à biblioteca da Embrapa Agricultura Digital. Para informações adicionais entre em contato com cnptia.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Agricultura Digital. |
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Data corrente: |
07/08/2009 |
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Data da última atualização: |
15/01/2020 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 1 |
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Autoria: |
ESCOBAR-GUTIÉRREZ, A. J.; CAMBES, D.; RACOCEVICK, M; BERRANGER, C. de; EPRINCHARD-CIESLA, A.; SINOQUET, H.; VARLET-GRANCHER, C. |
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Afiliação: |
ABRAHAM J. ESCOBAR-GUTIÉRREZ, INRA; DIDIER COMBES, INRA; MIROSLAVA RAKOCEVIC, CNPTIA; CHRISTOPHE DE BERRANGER, INRA; ANNIE EPRINCHARD-CIESLA, INRA; HERVÉ SINOQUET, Université Blaise Pascal; CLAUDE VARLET-GRANCHER, INRA. |
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Título: |
Functional relationships to estimate Morphogenetically Active Radiation (MAR) from PAR and solar broadband irradiance measurements: the case of a Sorghum crop. |
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Ano de publicação: |
2009 |
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Fonte/Imprenta: |
Agricultural and Forest Meteorology, v. 149, n. 8, p. 1244-1253, Aug. 2009. |
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DOI: |
http://dx.doi.org/10.1016/j.agrformet.2009.02.011 |
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Idioma: |
Inglês |
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Conteúdo: |
Light quality plays a key role in higher plants? morphogenesis. In most plant models, light is considered as a consumable resource and plants are assumed blind to light signals. However, prior to any effort for modelling photomorphogenetic mechanisms, it is necessary to characterise the spatial distribution of the Morphogenetically Active Radiation (MAR) over and within plant canopies. Measurements of local photosynthetic photon flux density (PPFD) and broadband irradiance (Es) are easy to carry out by using small sensors. Thus, the distribution of the MAR within a canopy can be estimated whenever the functional relationships between these measurements and the photon flux within any spectral band are known. The objective of this work was to determine these functional relationships from the light spectra received above and at various positions around a target plant within a growing sorghum crop. The MAR components considered in this work are related either to photon flux densities in various wavebands between 330 and 950 nm or to the ratio between two photon flux densities. A part of the photon flux-related variables is strictly included in the PAR band and might be estimated from PPFD measurements using linear relationships. The other variables are related to both PPFD and Es by multiple linear relationships. The phytochrome photoequilibrium and the red to far-red ratios were related to the relative transmitted PPFD and to the ratio PPFD/Es within the canopy using a non-linear model. Models were validated against an independent set of data. We demonstrate that the MAR components within a sorghum crop can be accurately estimated with the functional relationships presented in this paper. MenosLight quality plays a key role in higher plants? morphogenesis. In most plant models, light is considered as a consumable resource and plants are assumed blind to light signals. However, prior to any effort for modelling photomorphogenetic mechanisms, it is necessary to characterise the spatial distribution of the Morphogenetically Active Radiation (MAR) over and within plant canopies. Measurements of local photosynthetic photon flux density (PPFD) and broadband irradiance (Es) are easy to carry out by using small sensors. Thus, the distribution of the MAR within a canopy can be estimated whenever the functional relationships between these measurements and the photon flux within any spectral band are known. The objective of this work was to determine these functional relationships from the light spectra received above and at various positions around a target plant within a growing sorghum crop. The MAR components considered in this work are related either to photon flux densities in various wavebands between 330 and 950 nm or to the ratio between two photon flux densities. A part of the photon flux-related variables is strictly included in the PAR band and might be estimated from PPFD measurements using linear relationships. The other variables are related to both PPFD and Es by multiple linear relationships. The phytochrome photoequilibrium and the red to far-red ratios were related to the relative transmitted PPFD and to the ratio PPFD/Es within the canopy using a non-line... Mostrar Tudo |
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Palavras-Chave: |
Cryptochrome; Cultura de sorgo; Fitocromo; Modelagem; Sorghum crop. |
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Thesagro: |
Radiação solar; Sorgo. |
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Thesaurus NAL: |
Light quality; Models; Photomorphogenesis; Phytochrome. |
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Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
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Marc: |
LEADER 02785naa a2200337 a 4500
001 1256524
005 2020-01-15
008 2009 bl uuuu u00u1 u #d
024 7 $ahttp://dx.doi.org/10.1016/j.agrformet.2009.02.011$2DOI
100 1 $aESCOBAR-GUTIÉRREZ, A. J.
245 $aFunctional relationships to estimate Morphogenetically Active Radiation (MAR) from PAR and solar broadband irradiance measurements$bthe case of a Sorghum crop.$h[electronic resource]
260 $c2009
520 $aLight quality plays a key role in higher plants? morphogenesis. In most plant models, light is considered as a consumable resource and plants are assumed blind to light signals. However, prior to any effort for modelling photomorphogenetic mechanisms, it is necessary to characterise the spatial distribution of the Morphogenetically Active Radiation (MAR) over and within plant canopies. Measurements of local photosynthetic photon flux density (PPFD) and broadband irradiance (Es) are easy to carry out by using small sensors. Thus, the distribution of the MAR within a canopy can be estimated whenever the functional relationships between these measurements and the photon flux within any spectral band are known. The objective of this work was to determine these functional relationships from the light spectra received above and at various positions around a target plant within a growing sorghum crop. The MAR components considered in this work are related either to photon flux densities in various wavebands between 330 and 950 nm or to the ratio between two photon flux densities. A part of the photon flux-related variables is strictly included in the PAR band and might be estimated from PPFD measurements using linear relationships. The other variables are related to both PPFD and Es by multiple linear relationships. The phytochrome photoequilibrium and the red to far-red ratios were related to the relative transmitted PPFD and to the ratio PPFD/Es within the canopy using a non-linear model. Models were validated against an independent set of data. We demonstrate that the MAR components within a sorghum crop can be accurately estimated with the functional relationships presented in this paper.
650 $aLight quality
650 $aModels
650 $aPhotomorphogenesis
650 $aPhytochrome
650 $aRadiação solar
650 $aSorgo
653 $aCryptochrome
653 $aCultura de sorgo
653 $aFitocromo
653 $aModelagem
653 $aSorghum crop
700 1 $aCAMBES, D.
700 1 $aRACOCEVICK, M
700 1 $aBERRANGER, C. de
700 1 $aEPRINCHARD-CIESLA, A.
700 1 $aSINOQUET, H.
700 1 $aVARLET-GRANCHER, C.
773 $tAgricultural and Forest Meteorology$gv. 149, n. 8, p. 1244-1253, Aug. 2009.
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