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Registro Completo |
Biblioteca(s): |
Embrapa Amazônia Oriental; Embrapa Meio Ambiente; Embrapa Pantanal. |
Data corrente: |
26/04/1993 |
Data da última atualização: |
26/01/2023 |
Autoria: |
DANTAS, M. |
Afiliação: |
MARIO DANTAS, CPATU. |
Título: |
Studies on succession in cleared areas of Amazonian rain forest. |
Ano de publicação: |
1989 |
Fonte/Imprenta: |
Oxford: Oxford University, 1989. |
Páginas: |
397 p. |
Descrição Física: |
il. |
Idioma: |
Inglês |
Notas: |
Ph.D. Thesis. |
Conteúdo: |
Amazonian primary rain forest plots, which had been transformed at different times within the last 20 years into man-made pasture, plantations, or secondary vegetation were all shown to have undergone impoverishment in terms of floristic composition, species diversity, standing biomass and nutrient stocks. Ecosystem recovery started immediately after pertubation of the primary forest by means of clearfelling plus a variety of land clearance procedures. It was hypothesised that succession under all treatments, and in the absence of further disturbance, would proceed towards a floristic composition, biomass and nutrient stock level similar to that observed in mature primary forest. Floristic composition, species diversity, density and frequency were studied in primary forest and different stages of succession (early abandoned pasture; 2 year, 3 year, 4 year, 5 year and 10 year old capoeira). Speciescomposition of primary forest, as represented by plants with a girth greater than 30cm, comprised 115 to 221 species per hectare depending on location. Species diversity was high and the plant community was characterised by a few dominant species with many individual and large number of rare species. In successional vegetation, species composition changed over time showing three clear stages: herbaceous-graminoid, shrubby and arboreal. The diversity was high and tended to increase over time while the number of individuals per species decrease. Frequency of occurrence patterns were similar to those found for primary forest. Standing biomass and nutrient content; litterfall, ash production and their potentially available nutrients were studied in selected stages of succession. Primary forest biomass at different locations ranged form 374 to 522 t dry weight.ha-1 (mean +- SD = 468 +- 66 t.ha-1) while in secondary vegetation it was more variable depending on age and previous land use (range: 5.54 t.ha-1 in abandoned pasture to 53.2 t.ha-1 in 2-year old capoeira). Nutrient concentration were found to be higher in species characteristic of secondary vegetation but the nutrient stocks per unit area of the successional ecosystems were much less than those of primary forest. Similar amount of nutrients were released via ash from primary forest and 20-year old capoeira; but the total nutrients in litterfall proved to be highest in primary forest. The impact of four methods of land clearance (slah + burn, slah + herbicide, slah + burn + herbicide and bulldozer) on seed banks ans early stages of sucession were also studied. Bulldozer was the most and slash + herbicide the least, deleterious treatment according to the attributes under study. MenosAmazonian primary rain forest plots, which had been transformed at different times within the last 20 years into man-made pasture, plantations, or secondary vegetation were all shown to have undergone impoverishment in terms of floristic composition, species diversity, standing biomass and nutrient stocks. Ecosystem recovery started immediately after pertubation of the primary forest by means of clearfelling plus a variety of land clearance procedures. It was hypothesised that succession under all treatments, and in the absence of further disturbance, would proceed towards a floristic composition, biomass and nutrient stock level similar to that observed in mature primary forest. Floristic composition, species diversity, density and frequency were studied in primary forest and different stages of succession (early abandoned pasture; 2 year, 3 year, 4 year, 5 year and 10 year old capoeira). Speciescomposition of primary forest, as represented by plants with a girth greater than 30cm, comprised 115 to 221 species per hectare depending on location. Species diversity was high and the plant community was characterised by a few dominant species with many individual and large number of rare species. In successional vegetation, species composition changed over time showing three clear stages: herbaceous-graminoid, shrubby and arboreal. The diversity was high and tended to increase over time while the number of individuals per species decrease. Frequency of occurrence patterns were s... Mostrar Tudo |
Palavras-Chave: |
Amazon; Amazonian Rain Forest; Aspectos naturais; Brasil; Ciclagem de nutriente; Composicao floristica; Composition; Diversity; Floresta amazonica; Floresta chuvosa; Floristic composition; Forest; Land clearence; Liteira; Litter; Man made pasture; Nutrient; Nutrient cycling; Plant community; Rain forest; Regiao amazonica; Secondary forest; Seed; Specie diversity. |
Thesagro: |
Biomassa; Ecologia; Ecologia Animal; Espécie; Flora; Floresta Secundaria; Fogo; Nutriente; Semente; Solo; Vegetação. |
Thesaurus Nal: |
Amazonia; biomass; Brazil; deforestation; ecology; nutrient content; soil. |
Categoria do assunto: |
-- K Ciência Florestal e Produtos de Origem Vegetal |
Marc: |
LEADER 04212nam a2200637 a 4500 001 1402459 005 2023-01-26 008 1989 bl uuuu m 00u1 u #d 100 1 $aDANTAS, M. 245 $aStudies on succession in cleared areas of Amazonian rain forest. 260 $aOxford: Oxford University$c1989 300 $a397 p.$cil. 500 $aPh.D. Thesis. 520 $aAmazonian primary rain forest plots, which had been transformed at different times within the last 20 years into man-made pasture, plantations, or secondary vegetation were all shown to have undergone impoverishment in terms of floristic composition, species diversity, standing biomass and nutrient stocks. Ecosystem recovery started immediately after pertubation of the primary forest by means of clearfelling plus a variety of land clearance procedures. It was hypothesised that succession under all treatments, and in the absence of further disturbance, would proceed towards a floristic composition, biomass and nutrient stock level similar to that observed in mature primary forest. Floristic composition, species diversity, density and frequency were studied in primary forest and different stages of succession (early abandoned pasture; 2 year, 3 year, 4 year, 5 year and 10 year old capoeira). Speciescomposition of primary forest, as represented by plants with a girth greater than 30cm, comprised 115 to 221 species per hectare depending on location. Species diversity was high and the plant community was characterised by a few dominant species with many individual and large number of rare species. In successional vegetation, species composition changed over time showing three clear stages: herbaceous-graminoid, shrubby and arboreal. The diversity was high and tended to increase over time while the number of individuals per species decrease. Frequency of occurrence patterns were similar to those found for primary forest. Standing biomass and nutrient content; litterfall, ash production and their potentially available nutrients were studied in selected stages of succession. Primary forest biomass at different locations ranged form 374 to 522 t dry weight.ha-1 (mean +- SD = 468 +- 66 t.ha-1) while in secondary vegetation it was more variable depending on age and previous land use (range: 5.54 t.ha-1 in abandoned pasture to 53.2 t.ha-1 in 2-year old capoeira). Nutrient concentration were found to be higher in species characteristic of secondary vegetation but the nutrient stocks per unit area of the successional ecosystems were much less than those of primary forest. Similar amount of nutrients were released via ash from primary forest and 20-year old capoeira; but the total nutrients in litterfall proved to be highest in primary forest. The impact of four methods of land clearance (slah + burn, slah + herbicide, slah + burn + herbicide and bulldozer) on seed banks ans early stages of sucession were also studied. Bulldozer was the most and slash + herbicide the least, deleterious treatment according to the attributes under study. 650 $aAmazonia 650 $abiomass 650 $aBrazil 650 $adeforestation 650 $aecology 650 $anutrient content 650 $asoil 650 $aBiomassa 650 $aEcologia 650 $aEcologia Animal 650 $aEspécie 650 $aFlora 650 $aFloresta Secundaria 650 $aFogo 650 $aNutriente 650 $aSemente 650 $aSolo 650 $aVegetação 653 $aAmazon 653 $aAmazonian Rain Forest 653 $aAspectos naturais 653 $aBrasil 653 $aCiclagem de nutriente 653 $aComposicao floristica 653 $aComposition 653 $aDiversity 653 $aFloresta amazonica 653 $aFloresta chuvosa 653 $aFloristic composition 653 $aForest 653 $aLand clearence 653 $aLiteira 653 $aLitter 653 $aMan made pasture 653 $aNutrient 653 $aNutrient cycling 653 $aPlant community 653 $aRain forest 653 $aRegiao amazonica 653 $aSecondary forest 653 $aSeed 653 $aSpecie diversity
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Registro original: |
Embrapa Amazônia Oriental (CPATU) |
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Registro Completo
Biblioteca(s): |
Embrapa Florestas. |
Data corrente: |
01/04/2008 |
Data da última atualização: |
26/12/2023 |
Tipo da produção científica: |
Comunicado Técnico/Recomendações Técnicas |
Autoria: |
OLIVEIRA, E. B. |
Afiliação: |
Edilson Batista de Oliveira, Embrapa Florestas. |
Título: |
SisTeca: Simulador de crescimento e produção para o manejo de platações de Tectona grandis. |
Ano de publicação: |
2007 |
Fonte/Imprenta: |
Colombo: Embrapa Florestas, 2007. |
Páginas: |
5 p. |
Série: |
(Embrapa Florestas. Comunicado técnico, 199). |
ISSN: |
1517-5030 |
Idioma: |
Português |
Palavras-Chave: |
Espécie exótica; Simulador; Software. |
Thesagro: |
Crescimento; Manejo; Planejamento; Produção; Rendimento; Teca; Tectona Grandis. |
Categoria do assunto: |
K Ciência Florestal e Produtos de Origem Vegetal |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/CNPF-2009-09/42708/1/com_tec199.pdf
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Marc: |
LEADER 00697nam a2200253 a 4500 001 1303397 005 2023-12-26 008 2007 bl uuuu u0uu1 u #d 022 $a1517-5030 100 1 $aOLIVEIRA, E. B. 245 $aSisTeca$bSimulador de crescimento e produção para o manejo de platações de Tectona grandis. 260 $aColombo: Embrapa Florestas$c2007 300 $a5 p. 490 $a(Embrapa Florestas. Comunicado técnico, 199). 650 $aCrescimento 650 $aManejo 650 $aPlanejamento 650 $aProdução 650 $aRendimento 650 $aTeca 650 $aTectona Grandis 653 $aEspécie exótica 653 $aSimulador 653 $aSoftware
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Registro original: |
Embrapa Florestas (CNPF) |
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