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| Registros recuperados: 12 | |
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| Salm,Rodolfo. |
| The hypothesis that forest disturbance is important for the recruitment of the large arborescent palms Attalea maripa was tested with a natural experiment in the Pinkaití site (7º 46'S; 51º 57'W), a seasonally-dry Amazonian forest. A 8,000 m long trail, that crosses, in its lower half, an open forest along the Pinkaití stream bottomlands and, on its upper half, a dense forest on a hill, was divided in 160 0.15 ha (50x30 m) sampling units. At each unit, adult palms were counted and percentage of canopy openness was measured with a concave spherical densiometer. The palms were nearly five times more abundant at the bottomlands, whose forest had a canopy 14.8% more open than that of the hill; supporting the hypothesis that disturbance is important for their... |
| Tipo: Info:eu-repo/semantics/other |
Palavras-chave: Attalea maripa; Forest dynamics; Palm trees; Forest regeneration. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032005000100004 |
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| BAIDER,C.; TABARELLI,M.; MANTOVANI,W.. |
| A survey was conducted to determine the density and species composition of viable seeds buried in four stands of a tropical montane forest at Parque Estadual Intervales, Brazil. The objective was to understand: (1) how numbers and composition of the soil seed bank change as the forest regrows, and (2) how such changes affect the species available for regeneration if forests of different ages are cut down. In each forest stand (5, 18, 27-yr-old and a mature forest), 57 soil samples were collected (0-2.5 and 2.5-5 cm deep). Viable seed density of herbaceous species ranged between 11,003 seeds. m-2 (5-yr-old vegetation) and 482 (mature forest), and between 25 (5-yr-old vegetation) and 389 seeds. m-2 (mature forest) for woody plant species in the 0-5 cm soil... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Atlantic Forest; Brazil; Forest regeneration; Pioneer species; Soil seed bank. |
| Ano: 2001 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71082001000100006 |
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| Kometter, Roberto F; Universidad Nacional Agraria La Molina; kometter@lamolina01.lamolina.edu.pe; Martinez, Martha; Center for Applied Biodiversity Science, Conservation International; m.martinez@conservation.org; Blundell, Arthur G; EGAT Forest Team, USAID; art.blundell@alum.dartmouth.org; Gullison, Raymond E; Hardner & Gullison Associates; ted@hg-llc.com; Steininger, Marc K; Center for Applied Biodiversity Science, Conservation International; m.steininger@conservation.org; Rice, Richard E; Center for Applied Biodiversity Science, Conservation International; d.rice@conservation.org. |
| Although bigleaf mahogany [Swietenia macrophylla King (Meliaceae)] is the premier timber species of Latin America, its exploitation is unsustainable because of a pattern of local depletion and shifting supply. We surveyed experts on the status of mahogany in Bolivia and Peru, the world's past and present largest exporters. Bolivia no longer has commercially viable mahogany (trees > 60 cm diameter at breast height) across 79% of its range. In Peru, mahogany's range has shrunk by 50%, and, within a decade, a further 28% will be logged out. Approximately 15% of the mahogany range in these two countries is protected, but low densities and illegal logging mean that this overestimates the extent of mahogany under protection. The international community... |
| Tipo: Peer-Reviewed Reports |
Palavras-chave: Bolivia; Latin America; Peru; Expert survey; Forest conservation; Forest inventories; Forest regeneration; Mahogany; Protected areas; Questionnaire; Range; Sustainable forestry. |
| Ano: 2004 |
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| BARLOW, J.; ANDERSON, L.; BERENGUER, E.; BRANCALION, P.; CARVALHO, N.; FERREIRA, J. N.; GARRETT, R.; JAKOVAC, C.; NASCIMENTO, N.; PEÑA-CLAROS, M.; RODRIGUES, R.; VALENTIM, J. F.. |
| Esta publicação aborda a necessidade de uma restauração em larga escala na Amazônia, apontando algumas soluções. |
| Tipo: Folhetos |
Palavras-chave: Desmatamento zero; Deforestación; Protección ambiental; Política forestal; Regeneración forestal; Restoration arches; Meio Ambiente; Desmatamento; Políticas Públicas; Política Ambiental; Controle Ambiental; Proteção Florestal; Regeneração; Amazonia; Deforestation; Environmental protection; Public policy; Forest policy; Forest regeneration. |
| Ano: 2023 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1151225 |
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| VALENTIM, J. F.. |
| O estado do Acre, com 152.589 km2, tem como cobertura vegetal predominante a floresta tropical úmida aberta (77%) e densa (14%) (IBDF, 1984). A ocupação da Amazônia e do Acre, em particular, a partir da década de 60, tem sido um processo dirigido através de programas dos governos estadual e federal. Esta ocupação tem como objetivo resolver problemas de natureza social, econômica e política. A relativa escassez de conhecimentos científicos disponíveis sobre os mecanismos que garantem a sobrevivência da floresta pluvial tropical, predominante na região, está longe de permitir que se possa recomendar a exploração, em grande escala e ecologicamente segura, desse fantástico bioma. |
| Tipo: Artigo na mídia |
Palavras-chave: Acre; Amazônia Ocidental; Amazonia occidental; Degradação do solo; Cultivo mixto; Deforestación; Degradación del suelo; Incendios forestales; Leguminosas forrajeras; Regeneración forestal; Variedades de rendimiento elevado; Western amazon; Floresta; Desmatamento; Queimada; Incêndio florestal; Recuperação do solo; Pastagem consorciada; Leguminosa forrageira; Kudzu; Pueraria phaseoloides; Variedade resistente; Soil degradation; Deforestation; Forest fires; Forest regeneration; Mixed cropping; Forage legumes; High-yielding varieties; Amazónia. |
| Ano: 1989 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/510563 |
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| Oliveira Filho,Ary T.; Carvalho,Douglas A.; Vilela,Enivanis A.; Curi,Nilton; Fontes,Marco Aurélio L.. |
| Two adjacent tracts of tropical secondary forest, situated in Itambé do Mato Dentro, south-eastern Brazil, which had been regenerating for 15 and 40 years after clearing, were compared with the purpose of detecting differences in species diversity and composition, species guild composition (regeneration, stratification and dispersion), and stand structure. Four and three 1,125 m² plots laid on the 15- and 40-year-old stands, respectively, sampled 2,430 trees with diameter at the base of the stem > 5 cm. The number of species (S = 199) was high for this forest type and significantly higher for the older stand. Tree density was significantly higher in the younger stand, particularly for smaller trees, whereas the two stands did not differ in both basal... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Brazilian Atlantic forest; Forest regeneration; Succession; Tropical secondary forest. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042004000400009 |
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| VARGAS,RODRIGO; CUEVAS,JAIME G; LE QUESNE,CARLOS; REIF,ALBERT; BANNISTER,JAN. |
| We describe the structure of the endemic Robinson Crusoe Island forest. We analyse the regeneration strategies of the trees: Myrceugenia fernandeziana, Fagara mayu, and Drimys confertifolia. Inventories were taken on nearly intact montane forest remnants with emphasis on spatial patterns by using Ripley's K (t) function. We hypothesized that i) ornithochorous and barochorous species should show a clumped regeneration, as a consequence of seed rain; ii) nurse effect, if present, should also contribute to a clustered pattern; iii) clustering should disappear at more developed life-stages due to self-thinning; iv) if gaps influence tree mortality and regeneration, these will present grouped patterns. Myrceugenia fernandeziana was the most abundant tree... |
| Tipo: Journal article |
Palavras-chave: Forest regeneration; Juan Fernández Islands; Myrtisylva; Ripley's K-function; Spatial point pattern analysis. |
| Ano: 2010 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2010000300003 |
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| Registros recuperados: 12 | |
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