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Registro Completo |
Biblioteca(s): |
Embrapa Cerrados; Embrapa Recursos Genéticos e Biotecnologia. |
Data corrente: |
10/01/2023 |
Data da última atualização: |
24/03/2023 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
SILVA, T. R.; RODRIGUES, S. B.; BRINGEL, J. B. A.; SAMPAIO, A. B.; SANO, E. E.; VIEIRA, D. L. M. |
Afiliação: |
TAMILIS ROCHA SILVA; SILVIA BARBOSA RODRIGUES; JOAO BERNARDO DE AZEVEDO BRINGEL; ALEXANDRE BONESSO SAMPAIO; EDSON EYJI SANO, CPAC; DANIEL LUIS MASCIA VIEIRA, Cenargen. |
Título: |
Factors affecting savanna and forest regeneration in pastures across the cerrado. |
Ano de publicação: |
2023 |
Fonte/Imprenta: |
Journal of Environmental Management, v. 330, 2023. |
Páginas: |
11 p. |
DOI: |
https://doi.org/10.1016/j.jenvman.2022.117185 |
Idioma: |
Inglês |
Conteúdo: |
The Cerrado region comprises the world?s most biodiverse savanna and the largest cultivated pastures for cattle
in Brazil. Forty percent of these pastures are unproductive or degraded, with bare soil and native vegetation
increasingly replacing exotic forage grasses. This study sought to investigate the regeneration of native vege-
tation in the pastures of the Cerrado and to evaluate the contribution of biophysical, land management, and
landscape attributes to this process. Across the Cerrado, we analyzed pasture plant communities and the attri-
butes of pasture management intensification, fire events, landscape native vegetation cover, and climate and soil
types of 93 active pastures and 15 abandoned pastures. For the abandoned pastures, time since abandonment was
an additional variable. On actively cultivated pastures, savanna regeneration varied from 0 to 70%, with a di-
versity of herbs and woody species. Pasture management was the main predictor of savanna regeneration on
cultivated pastures. On abandoned pastures, time since abandonment was the main predictor. Exotic grass cover
had a strong negative relationship with savanna regeneration and they were present even in pastures abandoned
for 44 years. Our study reveals the potential of natural regeneration of the Cerrado and its particular predictors.
The occurrence of pastures with high natural regeneration indicates that national policies can promote native
vegetation restoration and silvopastoral systems with predictable, low cost implementation. MenosThe Cerrado region comprises the world?s most biodiverse savanna and the largest cultivated pastures for cattle
in Brazil. Forty percent of these pastures are unproductive or degraded, with bare soil and native vegetation
increasingly replacing exotic forage grasses. This study sought to investigate the regeneration of native vege-
tation in the pastures of the Cerrado and to evaluate the contribution of biophysical, land management, and
landscape attributes to this process. Across the Cerrado, we analyzed pasture plant communities and the attri-
butes of pasture management intensification, fire events, landscape native vegetation cover, and climate and soil
types of 93 active pastures and 15 abandoned pastures. For the abandoned pastures, time since abandonment was
an additional variable. On actively cultivated pastures, savanna regeneration varied from 0 to 70%, with a di-
versity of herbs and woody species. Pasture management was the main predictor of savanna regeneration on
cultivated pastures. On abandoned pastures, time since abandonment was the main predictor. Exotic grass cover
had a strong negative relationship with savanna regeneration and they were present even in pastures abandoned
for 44 years. Our study reveals the potential of natural regeneration of the Cerrado and its particular predictors.
The occurrence of pastures with high natural regeneration indicates that national policies can promote native
vegetation restoration and silvopastoral systems with p... Mostrar Tudo |
Palavras-Chave: |
Regeneração ambiental. |
Thesagro: |
Biodiversidade; Cerrado; Degradação Ambiental; Regeneração Natural. |
Thesaurus Nal: |
Natural regeneration. |
Categoria do assunto: |
-- |
Marc: |
LEADER 02369naa a2200277 a 4500 001 2150850 005 2023-03-24 008 2023 bl uuuu u00u1 u #d 024 7 $ahttps://doi.org/10.1016/j.jenvman.2022.117185$2DOI 100 1 $aSILVA, T. R. 245 $aFactors affecting savanna and forest regeneration in pastures across the cerrado.$h[electronic resource] 260 $c2023 300 $a11 p. 520 $aThe Cerrado region comprises the world?s most biodiverse savanna and the largest cultivated pastures for cattle in Brazil. Forty percent of these pastures are unproductive or degraded, with bare soil and native vegetation increasingly replacing exotic forage grasses. This study sought to investigate the regeneration of native vege- tation in the pastures of the Cerrado and to evaluate the contribution of biophysical, land management, and landscape attributes to this process. Across the Cerrado, we analyzed pasture plant communities and the attri- butes of pasture management intensification, fire events, landscape native vegetation cover, and climate and soil types of 93 active pastures and 15 abandoned pastures. For the abandoned pastures, time since abandonment was an additional variable. On actively cultivated pastures, savanna regeneration varied from 0 to 70%, with a di- versity of herbs and woody species. Pasture management was the main predictor of savanna regeneration on cultivated pastures. On abandoned pastures, time since abandonment was the main predictor. Exotic grass cover had a strong negative relationship with savanna regeneration and they were present even in pastures abandoned for 44 years. Our study reveals the potential of natural regeneration of the Cerrado and its particular predictors. The occurrence of pastures with high natural regeneration indicates that national policies can promote native vegetation restoration and silvopastoral systems with predictable, low cost implementation. 650 $aNatural regeneration 650 $aBiodiversidade 650 $aCerrado 650 $aDegradação Ambiental 650 $aRegeneração Natural 653 $aRegeneração ambiental 700 1 $aRODRIGUES, S. B. 700 1 $aBRINGEL, J. B. A. 700 1 $aSAMPAIO, A. B. 700 1 $aSANO, E. E. 700 1 $aVIEIRA, D. L. M. 773 $tJournal of Environmental Management$gv. 330, 2023.
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Embrapa Cerrados (CPAC) |
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Registro Completo
Biblioteca(s): |
Embrapa Agroenergia; Embrapa Recursos Genéticos e Biotecnologia; Embrapa Semiárido. |
Data corrente: |
15/12/2023 |
Data da última atualização: |
12/03/2024 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
B - 1 |
Autoria: |
AIDAR, S. de T.; CHAVES, A. R. de M.; FERNANDES JUNIOR, P. I.; MORGANTE, C. V. |
Afiliação: |
SAULO DE TARSO AIDAR, CPATSA; AGNALDO RODRIGUES DE MELO CHAVES, CPATSA; PAULO IVAN FERNANDES JUNIOR, CPATSA; CAROLINA VIANNA MORGANTE, CPATSA / Cenargen. |
Título: |
Ferns and Lycophytes as new challenges: physiological and biochemical changes in desiccation and rehydration cycles of Selaginella convoluta (Selaginellaceae). |
Ano de publicação: |
2023 |
Fonte/Imprenta: |
Rodriguésia, v. 74, e00672023, 2023. |
DOI: |
http://dx.doi.org/10.1590/2175-7860202374088 |
Idioma: |
Inglês |
Conteúdo: |
Vegetative desiccation tolerance (VDT) is a biological process that allows resurrection plants to complete desiccation-rehydration cycles and survive without permanent damage. Physiological and biochemical changes related to the VDT were evaluated in the lycophyte Selaginella convoluta from the Caatinga biome, a seasonally dry tropical forest of northeastern Brazil. As representative of the oldest division of extant vascular plants, the investigation of VDT mechanisms in this species serves as an opportunity to provide information for research communities interested in functional traits related to water-limited conditions. The experiments were performed with plants in their natural habitat, in dry and rainy seasons, and in pots under shade house conditions. Relative water content, chlorophyll a fluorescence, gas exchange, activity of antioxidant enzymes, concentration of chlorophylls, proteins, total amino acids, proline, and soluble carbohydrates in leaf tissues were evaluated throughout the process of complete dehydration and subsequent re-watering of intact plants. The overall results reveal the capacity of S. convoluta to tolerate extreme dehydration and rapidly recover upon rehydration. This species minimizes potential damages during the desiccation-rehydration cycle due to the presence of inductive mechanisms (photochemical preventing, sucrose accumulation) and constitutive mechanisms (antioxidant activity of catalase and ascorbate peroxidase), which share similarities with the VDT of both angiosperms and bryophytes. MenosVegetative desiccation tolerance (VDT) is a biological process that allows resurrection plants to complete desiccation-rehydration cycles and survive without permanent damage. Physiological and biochemical changes related to the VDT were evaluated in the lycophyte Selaginella convoluta from the Caatinga biome, a seasonally dry tropical forest of northeastern Brazil. As representative of the oldest division of extant vascular plants, the investigation of VDT mechanisms in this species serves as an opportunity to provide information for research communities interested in functional traits related to water-limited conditions. The experiments were performed with plants in their natural habitat, in dry and rainy seasons, and in pots under shade house conditions. Relative water content, chlorophyll a fluorescence, gas exchange, activity of antioxidant enzymes, concentration of chlorophylls, proteins, total amino acids, proline, and soluble carbohydrates in leaf tissues were evaluated throughout the process of complete dehydration and subsequent re-watering of intact plants. The overall results reveal the capacity of S. convoluta to tolerate extreme dehydration and rapidly recover upon rehydration. This species minimizes potential damages during the desiccation-rehydration cycle due to the presence of inductive mechanisms (photochemical preventing, sucrose accumulation) and constitutive mechanisms (antioxidant activity of catalase and ascorbate peroxidase), which share similarities... Mostrar Tudo |
Palavras-Chave: |
Bioma Caatinga; Característica funcional; Características funcionais; Dessecação vegetativa; Estratégia de sobrevivência; Planta de ressurreição; Resistência à desidratação. |
Thesagro: |
Caatinga; Samambaia. |
Thesaurus NAL: |
Selaginella. |
Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/doc/1159794/1/Ferns-and-Lycophytes-as-new-challenges-physiological-and-biochemical-changes-in-desiccation-and-rehydration-cycles-of-Selaginella-convoluta.pdf
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Marc: |
LEADER 02537naa a2200289 a 4500 001 2159794 005 2024-03-12 008 2023 bl uuuu u00u1 u #d 024 7 $ahttp://dx.doi.org/10.1590/2175-7860202374088$2DOI 100 1 $aAIDAR, S. de T. 245 $aFerns and Lycophytes as new challenges$bphysiological and biochemical changes in desiccation and rehydration cycles of Selaginella convoluta (Selaginellaceae).$h[electronic resource] 260 $c2023 520 $aVegetative desiccation tolerance (VDT) is a biological process that allows resurrection plants to complete desiccation-rehydration cycles and survive without permanent damage. Physiological and biochemical changes related to the VDT were evaluated in the lycophyte Selaginella convoluta from the Caatinga biome, a seasonally dry tropical forest of northeastern Brazil. As representative of the oldest division of extant vascular plants, the investigation of VDT mechanisms in this species serves as an opportunity to provide information for research communities interested in functional traits related to water-limited conditions. The experiments were performed with plants in their natural habitat, in dry and rainy seasons, and in pots under shade house conditions. Relative water content, chlorophyll a fluorescence, gas exchange, activity of antioxidant enzymes, concentration of chlorophylls, proteins, total amino acids, proline, and soluble carbohydrates in leaf tissues were evaluated throughout the process of complete dehydration and subsequent re-watering of intact plants. The overall results reveal the capacity of S. convoluta to tolerate extreme dehydration and rapidly recover upon rehydration. This species minimizes potential damages during the desiccation-rehydration cycle due to the presence of inductive mechanisms (photochemical preventing, sucrose accumulation) and constitutive mechanisms (antioxidant activity of catalase and ascorbate peroxidase), which share similarities with the VDT of both angiosperms and bryophytes. 650 $aSelaginella 650 $aCaatinga 650 $aSamambaia 653 $aBioma Caatinga 653 $aCaracterística funcional 653 $aCaracterísticas funcionais 653 $aDessecação vegetativa 653 $aEstratégia de sobrevivência 653 $aPlanta de ressurreição 653 $aResistência à desidratação 700 1 $aCHAVES, A. R. de M. 700 1 $aFERNANDES JUNIOR, P. I. 700 1 $aMORGANTE, C. V. 773 $tRodriguésia$gv. 74, e00672023, 2023.
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