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 | Acesso ao texto completo restrito à biblioteca da Embrapa Amazônia Oriental. Para informações adicionais entre em contato com cpatu.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Amazônia Oriental. |
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Data corrente: |
21/08/2006 |
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Data da última atualização: |
28/11/2022 |
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Autoria: |
LEWIS, S. L.; PHILLIPS, O. L.; BAKER, T. R.; LLOYD, J.; MALHI, Y.; ALMEIDA, S.; HIGUCHI, N.; LAURANCE, W. F.; NEILL, D. A.; SILVA, J. N. M.; TERBORGH, J.; LEZAMA, A. T.; VÁSQUEZ MARTÍNEZ, R.; BROWN, S.; CHAVE, J.; KUEBLER, C.; NÚÑEZ VARGAS, P.; VINCETI, B. |
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Afiliação: |
JOSÉ NATALINO MACEDO SILVA, CPATU. |
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Título: |
Concerted changes in tropical forest structure and dynamics: evidence from 50 South American long-term plots. |
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Ano de publicação: |
2004 |
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Fonte/Imprenta: |
Philippine Transactions of Royal Society of London, B, v. 359, n. 1443, p. 421-436, 2004. |
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DOI: |
10.1098/rstb.2003.1431 |
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Idioma: |
Inglês |
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Conteúdo: |
Several widespread changes in the ecology of old?growth tropical forests have recently been documented for the late twentieth century, in particular an increase in stem turnover (pan?tropical), and an increase in above?ground biomass (neotropical). Whether these changes are synchronous and whether changes in growth are also occurring is not known. We analysed stand?level changes within 50 long?term monitoring plots from across South America spanning 1971?2002. We show that: (i) basal area (BA: sum of the cross?sectional areas of all trees in a plot) increased significantly over time (by 0.10 ±; 0.04 m2 ha−1 yr−1, mean ± 95%CI) as did both (ii) stand?level BA growth rates (sum of the increments of BA of surviving trees and BA of new trees that recruited into a plot); and (iii) stand?level BA mortality rates (sum of the cross?sectional areas of all trees that died in a plot). Similar patterns were observed on a per?stem basis: (i) stem density (number of stems per hectare; 1 hectare is 104 m2) increased significantly over time (0.94 ± 0.63 stems ha−1 yr−1); as did both (ii) stem recruitment rates; and (iii) stem mortality rates. In relative terms, the pools of BA and stem density increased by 0.38 ± 0.15% and 0.18 ± 0.12% yr−1, respectively. The fluxes into and out of these pools?stand?level BA growth, stand?level BA mortality, stem recruitment and stem mortality rates?increased, in relative terms, by an order of magnitude more. The gain terms (BA growth, stem recruitment) consistently exceeded the loss terms (BA loss, stem mortality) throughout the period, suggesting that whatever process is driving these changes was already acting before the plot network was established. Large long?term increases in stand?level BA growth and simultaneous increases in stand BA and stem density imply a continent?wide increase in resource availability which is increasing net primary productivity and altering forest dynamics. Continent?wide changes in incoming solar radiation, and increases in atmospheric concentrations of CO2 and air temperatures may have increased resource supply over recent decades, thus causing accelerated growth and increased dynamism across the world's largest tract of tropical forest. MenosSeveral widespread changes in the ecology of old?growth tropical forests have recently been documented for the late twentieth century, in particular an increase in stem turnover (pan?tropical), and an increase in above?ground biomass (neotropical). Whether these changes are synchronous and whether changes in growth are also occurring is not known. We analysed stand?level changes within 50 long?term monitoring plots from across South America spanning 1971?2002. We show that: (i) basal area (BA: sum of the cross?sectional areas of all trees in a plot) increased significantly over time (by 0.10 ±; 0.04 m2 ha−1 yr−1, mean ± 95%CI) as did both (ii) stand?level BA growth rates (sum of the increments of BA of surviving trees and BA of new trees that recruited into a plot); and (iii) stand?level BA mortality rates (sum of the cross?sectional areas of all trees that died in a plot). Similar patterns were observed on a per?stem basis: (i) stem density (number of stems per hectare; 1 hectare is 104 m2) increased significantly over time (0.94 ± 0.63 stems ha−1 yr−1); as did both (ii) stem recruitment rates; and (iii) stem mortality rates. In relative terms, the pools of BA and stem density increased by 0.38 ± 0.15% and 0.18 ± 0.12% yr−1, respectively. The fluxes into and out of these pools?stand?level BA growth, stand?level BA mortality, stem recruitment and stem mortality rates?increased, in relative terms, by an order of magnitude more. The gain terms (BA... Mostrar Tudo |
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Palavras-Chave: |
Brasil. |
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Thesagro: |
Biomassa; Carbono; Desenvolvimento Florestal; Floresta Tropical; Mortalidade. |
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Thesaurus Nal: |
Amazonia. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 03453naa a2200421 a 4500
001 1408525
005 2022-11-28
008 2004 bl uuuu u00u1 u #d
024 7 $a10.1098/rstb.2003.1431$2DOI
100 1 $aLEWIS, S. L.
245 $aConcerted changes in tropical forest structure and dynamics$bevidence from 50 South American long-term plots.$h[electronic resource]
260 $c2004
520 $aSeveral widespread changes in the ecology of old?growth tropical forests have recently been documented for the late twentieth century, in particular an increase in stem turnover (pan?tropical), and an increase in above?ground biomass (neotropical). Whether these changes are synchronous and whether changes in growth are also occurring is not known. We analysed stand?level changes within 50 long?term monitoring plots from across South America spanning 1971?2002. We show that: (i) basal area (BA: sum of the cross?sectional areas of all trees in a plot) increased significantly over time (by 0.10 ±; 0.04 m2 ha−1 yr−1, mean ± 95%CI) as did both (ii) stand?level BA growth rates (sum of the increments of BA of surviving trees and BA of new trees that recruited into a plot); and (iii) stand?level BA mortality rates (sum of the cross?sectional areas of all trees that died in a plot). Similar patterns were observed on a per?stem basis: (i) stem density (number of stems per hectare; 1 hectare is 104 m2) increased significantly over time (0.94 ± 0.63 stems ha−1 yr−1); as did both (ii) stem recruitment rates; and (iii) stem mortality rates. In relative terms, the pools of BA and stem density increased by 0.38 ± 0.15% and 0.18 ± 0.12% yr−1, respectively. The fluxes into and out of these pools?stand?level BA growth, stand?level BA mortality, stem recruitment and stem mortality rates?increased, in relative terms, by an order of magnitude more. The gain terms (BA growth, stem recruitment) consistently exceeded the loss terms (BA loss, stem mortality) throughout the period, suggesting that whatever process is driving these changes was already acting before the plot network was established. Large long?term increases in stand?level BA growth and simultaneous increases in stand BA and stem density imply a continent?wide increase in resource availability which is increasing net primary productivity and altering forest dynamics. Continent?wide changes in incoming solar radiation, and increases in atmospheric concentrations of CO2 and air temperatures may have increased resource supply over recent decades, thus causing accelerated growth and increased dynamism across the world's largest tract of tropical forest.
650 $aAmazonia
650 $aBiomassa
650 $aCarbono
650 $aDesenvolvimento Florestal
650 $aFloresta Tropical
650 $aMortalidade
653 $aBrasil
700 1 $aPHILLIPS, O. L.
700 1 $aBAKER, T. R.
700 1 $aLLOYD, J.
700 1 $aMALHI, Y.
700 1 $aALMEIDA, S.
700 1 $aHIGUCHI, N.
700 1 $aLAURANCE, W. F.
700 1 $aNEILL, D. A.
700 1 $aSILVA, J. N. M.
700 1 $aTERBORGH, J.
700 1 $aLEZAMA, A. T.
700 1 $aVÁSQUEZ MARTÍNEZ, R.
700 1 $aBROWN, S.
700 1 $aCHAVE, J.
700 1 $aKUEBLER, C.
700 1 $aNÚÑEZ VARGAS, P.
700 1 $aVINCETI, B.
773 $tPhilippine Transactions of Royal Society of London, B$gv. 359, n. 1443, p. 421-436, 2004.
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Registro original: |
Embrapa Amazônia Oriental (CPATU) |
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Biblioteca |
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Origem |
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Classificação |
Cutter |
Registro |
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Registro Completo
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Biblioteca(s): |
Embrapa Instrumentação; Embrapa Semiárido. |
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Data corrente: |
26/10/2018 |
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Data da última atualização: |
15/01/2019 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
B - 1 |
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Autoria: |
SILVA, A. O. da; BASSOI, L. H.; SILVA, D. J. |
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Afiliação: |
ALEXSANDRO OLIVEIRA DA SILVA; LUIS HENRIQUE BASSOI, CNPDIA; DAVI JOSE SILVA, CPATSA. |
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Título: |
Nitrate and potassium movement in a sandy loam soil cultivated with fertigated grapevine (Vitis vinifera /L.) in the Brazilian Semiarid. |
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Ano de publicação: |
2018 |
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Fonte/Imprenta: |
Revista Brasileira de Fruticultura, Jaboticabal, v. 40, n. 5,v. 40, n. 5, e-652, 2018. |
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DOI: |
10.1590/0100-29452018652 |
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Idioma: |
Inglês |
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Conteúdo: |
ertigation can increase the efficiency of fertilizer application and facilitate the nutritional management of a crop. Thus, nitrate and potassium movements in a sandy loam soil were evaluated as function of fertilizer doses during three growing seasons of the grapevine cv. Syrah grafted on Paulsen 1103 rootstock (June to October 2013, February to June 2014, and August to November 2014) in Petrolina, state of Pernambuco, Brazil. Five doses of N (0, 15, 30, 60 and 120 kg ha-1) and five doses of K2O (0, 15, 30, 60 and 120 kg ha-1) were combined in a fractional 52 factorial design, totaling 13 combinations, in a randomized blocks experiment with four replications. The concentrations of nitrate and potassium in the soil solution were determined. Samples were collected by porous cup extractors installed at 0.4 and 0.6 m depths. The movement of these ions was obtained by the product between their concentration in the soil solution and the soil water flux density. The increase in nitrogen fertilization promoted a greater movement of NO3- (62.2 kg ha-1) in the soil. The movement of K+ was also observed in two growing seasons . |
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Palavras-Chave: |
Brazilian semiarid; Extrator de cápsulas porosas; Grapevine; Porous cup extractor; Semiárido. |
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Thesagro: |
Adubação; Fertirrigação; Nitrato; Porta Enxerto; Potássio; Solo; Solo Arenoso; Solução do Solo; Uva; Vitis Vinifera. |
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Thesaurus NAL: |
Fertigation; Grapes; Irrigation management; Soil solution; Vitis. |
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Categoria do assunto: |
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F Plantas e Produtos de Origem Vegetal |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/185865/1/Davi-2018.pdf
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Marc: |
LEADER 02297naa a2200397 a 4500
001 2099222
005 2019-01-15
008 2018 bl uuuu u00u1 u #d
024 7 $a10.1590/0100-29452018652$2DOI
100 1 $aSILVA, A. O. da
245 $aNitrate and potassium movement in a sandy loam soil cultivated with fertigated grapevine (Vitis vinifera /L.) in the Brazilian Semiarid.$h[electronic resource]
260 $c2018
520 $aertigation can increase the efficiency of fertilizer application and facilitate the nutritional management of a crop. Thus, nitrate and potassium movements in a sandy loam soil were evaluated as function of fertilizer doses during three growing seasons of the grapevine cv. Syrah grafted on Paulsen 1103 rootstock (June to October 2013, February to June 2014, and August to November 2014) in Petrolina, state of Pernambuco, Brazil. Five doses of N (0, 15, 30, 60 and 120 kg ha-1) and five doses of K2O (0, 15, 30, 60 and 120 kg ha-1) were combined in a fractional 52 factorial design, totaling 13 combinations, in a randomized blocks experiment with four replications. The concentrations of nitrate and potassium in the soil solution were determined. Samples were collected by porous cup extractors installed at 0.4 and 0.6 m depths. The movement of these ions was obtained by the product between their concentration in the soil solution and the soil water flux density. The increase in nitrogen fertilization promoted a greater movement of NO3- (62.2 kg ha-1) in the soil. The movement of K+ was also observed in two growing seasons .
650 $aFertigation
650 $aGrapes
650 $aIrrigation management
650 $aSoil solution
650 $aVitis
650 $aAdubação
650 $aFertirrigação
650 $aNitrato
650 $aPorta Enxerto
650 $aPotássio
650 $aSolo
650 $aSolo Arenoso
650 $aSolução do Solo
650 $aUva
650 $aVitis Vinifera
653 $aBrazilian semiarid
653 $aExtrator de cápsulas porosas
653 $aGrapevine
653 $aPorous cup extractor
653 $aSemiárido
700 1 $aBASSOI, L. H.
700 1 $aSILVA, D. J.
773 $tRevista Brasileira de Fruticultura, Jaboticabal$gv. 40, n. 5,v. 40, n. 5, e-652, 2018.
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Embrapa Semiárido (CPATSA) |
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