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Registros recuperados: 14
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Ações de restauração de florestas exploradas seletivamente no sudoeste da Amazônia brasileira. Repositório Alice
ARAUJO, H. J. B. de.
Por meio de técnicas de restauração, florestas exauridas podem ser conduzidas de maneira a minimizar os efeitos da exploração seletiva que as modificaram. O plantio de mudas é um método rápido e eficaz de restauração de florestas. Este trabalho objetiva descrever os resultados de plantios de enriquecimento de florestas de produção nos municípios de Xapuri, Brasiléia e Rio Branco, no estado do Acre. Foram utilizadas dez espécies florestais madeireiras comerciais: Amarelão (Aspidosperma vargasii A. DC.), Angelim (Ormosia arborea (Vell.) Harms), Cedro (Cedrela odorata L.), Cerejeira (Amburana acreana (Ducke) A. C. Sm.), Freijó (Cordia alliodora (Ruiz & Pav.) Oken), Ipê (Tabebuia serratifolia (Vahl) G. Nicholson), Itaúba (Mezilaurus itauba (Meisn.) Taub....
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Manejo florestal; Madera tropical; Regeneración forestal; Exploração seletiva; Producción de plántulas; Plantación; Amarelão; Aspidosperma vargasii; Ormosia arborea; Brazilian copal; Timbaúba; Enterolobium maximum; Xapuri (AC); Brasiléia (AC); Rio Branco (AC); Acre; Amazônia Ocidental; Western Amazon; Amazonia Occidental; Floresta; Essência Florestal; Regeneração; Muda; Plantio; Angelim; Cedro; Cedrela Odorata; Cerejeira Amarela; Amburana Acreana; Freijó Louro; Cordia Alliodora; Ipê Amarelo; Tabebuia Serratifolia; Itaúba; Mezilaurus Itauba; Jatobá; Hymenaea Courbaril; Mogno; Swietenia Macrophylla; Forest management; Tropical wood; Forest regeneration; Seedling production; Planting; Handroanthus serratifolius.
Ano: 2020 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1120194
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Bryophyte communities across the ecological succession process in the Caxiuanã National Forest, Pará, Brazil Anais da ABC (AABC)
TAKASHIMA-OLIVEIRA,TÁSSIA T.G.; MEDEIROS,PRISCILA S. DE; TAVARES-MARTINS,ANA CLÁUDIA C..
Abstract Bryophytes play an important role in the process of ecological succession: conditioning the environment favourably for the emergence of subsequent groups. The objective of this study was to investigate the distribution of bryophyte communities in a cronossequence in the Caxiuanã National Forest, Pará, Brazil. To this end, biological material was collected in forest remnants with different successional stages based on regeneration age: Stage I (0 – 10 years), Stage II (10 - 25), Stage III (> 25) and Stage IV (primary forests). Density, richness and composition of species were compared between successional stages and the occurrence of possible indicator-species was investigated. The identified taxa were also classified by guilds of tolerance to...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Amazon rainforest; Cryptogams; Forest regeneration; Secondary forest.
Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652020000100714
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Diversity and structure of the tree community of a fragment of tropical secondary forest of the brazilian Atlantic Forest domain 15 and 40 years after logging Rev. Bras. Bot.
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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Edaphic arthropods in different successional stages of Atlantic forest and abandoned. Repositório Alice
FERREIRA, C. dos R.; SOUZA, R. C. de; CORREIA, M. E. F.; RESENDE, A. S. de; ANJOS, L. H. C. dos; PEREIRA, M. G..
The vegetation may modifies the structure and composition of the community of edaphic arthropods. This study aimed to compare the community of edaphic arthropods in four areas of abandoned pasture (AP1, AP2, AP3, AP4) and four secondary native forest fragments in a successional gradient (FF1, FF2, FF3, FF4), in Itaboraí, Rio de Janeiro, Brazil. The areas are positioned on the hillside and the sampling was conducted in transects outlined in a toposequence (upper, middle and lower sections), where pitfall traps were installed in the dry season. The organisms were identified in taxonomic groups (class, order and family). Comparing the averages for AP and FF, there was no defined pattern in terms of the response of structural attributes (total abundance,...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Bioindicator; Forest fragmentation; Forest regeneration.
Ano: 2017 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1087233
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Fluctuating asymmetry of and herbivory on Poincianella pyramidalis (Tul.) L.P. Queiroz (Fabaceae) in pasture and secondary tropical dry forest Acta Botanica
Ribeiro,Viviane Andrade; Silva,Rosineide Nascimento da; Sousa-Souto,Leandro; Neves,Frederico de Siqueira.
Plants subjected to stressful environments tend to be more asymmetric with reduced defenses and are therefore more vulnerable to herbivory. This study investigates the relationship between herbivory and fluctuating asymmetry (FA) in Poincianella pyramidalis in two contrasting habitat types in the Brazilian caatinga (shrublands). We tested the following hypotheses: that FA occurs in P. pyramidalis; that FA of P. pyramidalis leaves is greater in individuals located in pasture than in those located in secondary tropical dry forest; that herbivory by insects (leaf chewers and leaf miners) increases in parallel with increases in the level of FA; and that herbivory is more common in pasture than in secondary tropical dry forest. In each of the two environments,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Caatinga; Forest regeneration; Leaf miners; Plant-insect interactions; Tropical dry forests.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062013000100003
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Impacts of Unsustainable Mahogany Logging in Bolivia and Peru Ecology and Society
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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Mais pastagens, menos devastação: tecnologia permite redução de queimadas na formação de pastagens. Infoteca-e
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 de divulgação na mídia (INFOTECA-E) Palavras-chave: Acre; Amazônia Ocidental; Floresta; Degradação do solo; Desmatamento; Queimada; Incêndio florestal; Recuperação do solo; Pastagem consorciada; Leguminosa forrageira; Kudzu; Pueraria phaseoloides; Variedade resistente; Amazonia; Soil degradation; Deforestation; Forest fires; Forest regeneration; Mixed cropping; Forage legumes; High-yielding varieties; Western Amazon; Amazónia; Degradación del suelo; Deforestación; Incendios forestales; Regeneración forestal; Cultivo mixto; Leguminosas forrajeras; Variedades de rendimiento elevado; Amazonia Occidental.
Ano: 1989 URL: http://www.infoteca.cnptia.embrapa.br/handle/doc/510563
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Natural regeneration dynamics of Mora paraensis (Ducke) Ducke in estuarine floodplain forests of the Amazon River. Repositório Alice
MIRANDA, Z. P.; GUEDES, M. C.; BATISTA, A. P. B.; SILVA, D. A. S. da.
The aim of this study was to evaluate the natural regeneration dynamics of Mora paraensis in floodplain forests in three regions of the eastern Amazon, and specifically, to explore the relationship between the abundance of regenerating trees and canopy openness. Tree height and circumference of all individuals of height >50 cm and diameter at breast height (DBH) <5 cm were measured in 2012, 2013 and 2015. A matrix of transitions was created and the natural regeneration (RR), demographic and dynamic rates were calculated. Hemispherical photos were used to measure canopy openness. There was no difference in the density of regenerating trees between the three study regions (mean = 2.957 ind. ha-1). The abundance of regenerating trees was highest in...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Pracuúba; Regeneração florestal; Forest dynamics; Lowland forest; Dinâmica florestal; Floresta de baixa altitude; Árvore Florestal; Produto Florestal; Mortalidade; Forest regeneration; Mortality.
Ano: 2018 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1091206
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Spatial distribution and regeneration strategies of the main forest species on Robinson Crusoe Island RChHN
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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Spatial patterns of tree community dynamics are detectable in a small (4 ha) and disturbed fragment of the Brazilian Atlantic forest Acta Botanica
Machado,Evandro Luiz Mendonça; Oliveira-Filho,Ary Teixeira de.
The dynamics of the tree community of a fragment of tropical semideciduous forest was investigated in south-eastern Brazil. Surveys were carried out in 2000 and 2005 in 29 20 × 20 m plots. The main purpose was to assess the possibility of detecting spatial patterns of dynamics that could be related to the heterogeneity of both the environment and disturbance history in a small forest area (4.0 ha). Rates of mortality and recruitment of trees and gain and loss of basal area were obtained for the whole sample, four pre-defined soil habitats, diameter classes and twelve tree populations. The tree community was rather unstable in the period, once mortality rates surpassed recruitment rates and loss rates of basal area surpassed gain rates all-over the area...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Forest disturbance; Forest fragments; Forest regeneration; Tropical semideciduous forest.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062010000100027
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The importance of forest disturbance for the recruitment of the large arborescent palm Attalea maripa in a seasonally-dry Amazonian forest Biota Neotropica
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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The main challenges of sustainable forest management in the Amazon: why sustainable forest management in the Amazon should be reinforced? Repositório Alice
SIST, P.; FREITAS, L. J. M. de; PIPONIOT, C.; HÉRAULT, B.; DERROIRE, G.; HONORIO, E.; KANASHIRO, M.; OLIVEIRA, M. V. N. d'; PEÑA-CLAROS, M.; RODNEY, K.; WORTEL, V.; SHENKIN, A..
We estimated the potential of natural production of the Amazonian forest to supply the future wood demand using more than 200 permanent plots for monitoring the long term response after logging of the TmFO network.
Tipo: Resumo em anais de congresso (ALICE) Palavras-chave: Manejo florestal; Explotación forestal; Regeneración forestal; Madera tropical; Equilibrio de abastecimiento; Administração Florestal; Exploração Florestal; Extração da Madeira; Impacto Ambiental; Regeneração Natural; Forest management; Logging; Environmental impact; Forest regeneration; Tropical wood; Supply balance.
Ano: 2019 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1114758
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The seed bank of a gallery forest in Southeastern Brazil BABT
Grombone-Guaratini,Maria Tereza; Leitão Filho,Hermógenes de Freitas; Kageyama,Paulo Yoshio.
The soil seed bank was studied in a gallery forest in Southeastern Brazil. Samples were collected from edge to edge along transects perpendicular to the river during the wet (December, 1990) and dry (August, 1991) seasons. The number of seeds found in the seed bank samples was greater in the dry season than in the wet season indicating that there was important variation in the seed stocks in these two periods. The similarity values between the seed bank and the community composition were low. The high density of weed species might be reflecting forest fragmentation and indicating a degree of perturbation.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Forest regeneration; Forest succession; Gallery forest; Soil seed-bank.
Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132004000500015
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The soil seed bank during Atlantic Forest regeneration in Southeast Brazil BJB
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
Registros recuperados: 14
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