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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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Embrapa Amazônia Oriental (CPATU) |
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Registro Completo
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Biblioteca(s): |
Embrapa Florestas. |
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Data corrente: |
19/09/2018 |
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Data da última atualização: |
20/09/2018 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
C - 0 |
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Autoria: |
BURCKHARDT, D.; QUEIROZ, D. L. de. |
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Afiliação: |
Daniel Burckhardt, Naturhistorisches Museum; DALVA LUIZ DE QUEIROZ, CNPF. |
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Título: |
First record of the Old World genus Padaukia Hollis & Martin, 1993 from Brazil with description of a new species (Hemiptera: Psylloidea). |
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Ano de publicação: |
2018 |
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Fonte/Imprenta: |
Entomologische Zeitschrift, Schwanfeld, v. 128, n. 3, p. 131-135, 2018. |
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Idioma: |
Inglês |
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Conteúdo: |
Padaukia macrolobii sp. nov. (Psyllidae, Psyllinae) é descrita do Brasil (estados do Amazonas, Mato Grosso e Roraima). Os adultos foram coletados em duas localidades em Macrolobium acaciifolium, Fabaceae que é seu provável hospedeiro. Este é o primeiro registro de Padaukia no Ámerica, anteriormente conhecida unicamente da África e Ásia. A descoberta documenta como a fauna de psilídeos do Brasil é pouco conhecida. |
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Palavras-Chave: |
Neotropical Region; Psyllinae; Systematics. |
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Thesagro: |
Praga de Planta. |
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Thesaurus NAL: |
Fabaceae; Macrolobium acaciifolium; New species; Sternorrhyncha. |
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Categoria do assunto: |
O Insetos e Entomologia |
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Marc: |
LEADER 01161naa a2200229 a 4500
001 2096011
005 2018-09-20
008 2018 bl uuuu u00u1 u #d
100 1 $aBURCKHARDT, D.
245 $aFirst record of the Old World genus Padaukia Hollis & Martin, 1993 from Brazil with description of a new species (Hemiptera$bPsylloidea).$h[electronic resource]
260 $c2018
520 $aPadaukia macrolobii sp. nov. (Psyllidae, Psyllinae) é descrita do Brasil (estados do Amazonas, Mato Grosso e Roraima). Os adultos foram coletados em duas localidades em Macrolobium acaciifolium, Fabaceae que é seu provável hospedeiro. Este é o primeiro registro de Padaukia no Ámerica, anteriormente conhecida unicamente da África e Ásia. A descoberta documenta como a fauna de psilídeos do Brasil é pouco conhecida.
650 $aFabaceae
650 $aMacrolobium acaciifolium
650 $aNew species
650 $aSternorrhyncha
650 $aPraga de Planta
653 $aNeotropical Region
653 $aPsyllinae
653 $aSystematics
700 1 $aQUEIROZ, D. L. de
773 $tEntomologische Zeitschrift, Schwanfeld$gv. 128, n. 3, p. 131-135, 2018.
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