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Search Results: 1 - 10 of 54842 matches for " Luciana álvares da;Scariot "
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Composi??o florística e estrutura da comunidade arbórea em uma floresta estacional decidual em afloramento calcário (Fazenda S?o José, S?o Domingos, GO, bacia do rio Paran?)
Silva, Luciana álvares da;Scariot, Aldicir;
Acta Botanica Brasilica , 2003, DOI: 10.1590/S0102-33062003000200012
Abstract: the paran? river basin (states of goiás and tocantins, brazil), with 5,940,382 ha, has many different plant physiognomies, including the deciduous forest on limestone outcrops which has not yet been studied in this region. in this paper we present the structure of the tree community of a deciduous forest on a limestone outcrop (13o 49'34'' s; 46o 41'55'' w) in s?o domingos municipality, goiás state, brazil. twenty-five plots of 20m × 20m (400m2) were randomly placed on lines 100 m apart. trees with dbh > 5cm were tagged, measured, and identified to species. in the phytosociological study, 588 individuals were sampled. a total of 36 tree species, belonging to 31 genera and 21 families were registered. the species with the highest importance value (iv) were: tabebuia impetiginosa (43,81), aspidosperma pyrifolium (35,64), luetzelburgia sp. (21,77), commiphora leptophloeos (18,79), myracrodruon urundeuva (15,79), pseudobombax tomentosum (13,42), combretum duarteanum (13,04), luehea divaricata (12,24), cabralea canjerana (11,99), ficus pertusa (11,82), jacaranda brasiliana (11,68) and aspidosperma sp. (10,57). together these make up 73.5% of total iv while the 24 remaining species constitute 26.5%.
Comunidade arbórea de uma floresta estacional decídua sobre afloramento calcário na Bacia do rio Paraná
Silva, Luciana álvares da;Scariot, Aldicir;
Revista árvore , 2004, DOI: 10.1590/S0100-67622004000100008
Abstract: the parana river basin - an area of 5,940,382 ha located in brazil- has a highly diverse phytophysiognomy and scarce flora information. wood extraction and pasture activities have decisively contributed to the removal of vegetation in this area. this study was carried out in a seasonal deciduous forest on limestone outcrop (approximately 13o41'16" s and 46o44'20" w) on canada farm (s?o domingos-go.) twenty -five plots of 20 m x 20m (1 ha) were randomly allocated on parallel lines 100 m apart. trees with stem diameter at 1.3 m breast height (dbh) > 5 cm were sampled and their dbh, maximum height and species determined. in the phytosociological study, 924 individuals comprising 48 species, 38 genera and 24 families were sampled. the species with the highest importance value (iv) were myracrodruon urundeuva (36.09%), pseudobombax tomentosum (34.75%), dilodendron bipinnatum (26.61%), combretum duarteanum (22.19%), jacaranda brasiliana (21.57%), commiphora leptophloeos (19.18%), astronium fraxinifolium (13.84%), tabebuia impetiginosa (13.79%), pseudobombax longiflorum (11.64%) and machaerium scleroxylon (10.00%), comprising 69.9% of the total iv. diversity was close to that found in other seasonal deciduous forest studies in the region.
Composi??o e estrutura da comunidade arbórea de uma floresta estacional decidual sobre afloramento calcário no Brasil central
Silva, Luciana álvares da;Scariot, Aldicir;
Revista árvore , 2004, DOI: 10.1590/S0100-67622004000100009
Abstract: the parana river basin (states of goias and tocantins, brazil), with 5,940,382 ha, has a high diversity of phytophysiognomies, including the deciduous forest on limestone outcrops, which has not been studied yet in this region. in this paper we present the structure of an arboreal community in a deciduous forest on limestone outcrops (13o31'11" s and 46o29'48" w) in sao vicente farm in the municipality of s?o domingos, goias, brazil. twenty-five plots of 20 m x 20 m (400 m2) were randomly allocated on lines set 100 m apart. trees with at least 5 cm of diameter at breast height (dbh) were tagged, measured, and identified to the species level. a total of 51 tree species, belonging to 41 genera and 25 families were registered among the 860 individuals sampled. these values are higher than those found for two other limestone outcrops in this region, except for density, probably as a consequence of the improved conservational status of this area. the species with the highest importance value (iv) were: pseudobombax tomentosum (36.39), dilodendron bipinnatum (31.55), tabebuia impetiginosa (26.66), combretum duarteanum (18.38), luehea divaricata (12.76), cavanillesia arborea (12.52), myracrodruon urundeuva (12.23), chorisia pubiflora (12.21) and acacia glomerosa (10.11), comprising together 57.6% of total. diversity was greater than that found in other outcrop areas in the region.
Composi o florística e estrutura da comunidade arbórea em uma floresta estacional decidual em afloramento calcário (Fazenda S o José, S o Domingos, GO, bacia do rio Paran )
Silva Luciana álvares da,Scariot Aldicir
Acta Botanica Brasilica , 2003,
Abstract: A bacia do rio Paran (Goiás e Tocantins) com 5.940.382ha, tem alta diversidade de fitofisionomias, incluindo a floresta estacional decidual sobre afloramento calcário, que ainda n o foi estudada nesta regi o. Este trabalho objetivou o levantamento quantitativo da vegeta o arbórea de uma floresta estacional decidual sobre afloramento calcário (13°49'34''S e 46o 41'55''W; 478m de altitude) na fazenda S o José, S o Domingos, GO. Foram demarcadas cinco linhas a intervalos de 100m, onde foram aleatoriamente alocadas 25 parcelas permanentes de 20 × 20m (1,0 ha). Em cada parcela foram amostrados todos os indivíduos com diametro à altura do peito (DAP) igual ou maior que 5cm, onde foram medidos o DAP e a altura, e identificadas as espécies. Foram amostrados 588 indivíduos (536 vivos e 52 mortos ainda em pé), pertencentes a 36 espécies, 31 gêneros e 21 famílias, com índice de Shannon 2,99 e Equabilidade 0,83. As principais espécies em valor de importancia (VI), foram: Tabebuia impetiginosa (43,81), Aspidosperma pyrifolium (35,64), Luetzelburgia sp. (21,77), Commiphora leptophloeos (18,79), Myracrodruon urundeuva (15,79), Pseudobombax tomentosum (13,42), Combretum duarteanum (13,04), Luehea divaricata (12,24), Cabralea canjerana (11,99), Ficus pertusa (11,82), Jacaranda brasiliana (11,68) e Aspidosperma sp. (10,57) que juntas somaram 73,5% do VI total, enquanto as 24 espécies restantes somaram 26,5%. Esta floresta é similar, em termos de diversidade, a outras áreas de afloramentos na regi o.
Levantamento fitossociológico em um fragmento de floresta estacional semidecídua, no município de S?o Carlos, SP
Silva, Luciana álvares da;Soares, Jo?o Juares;
Acta Botanica Brasilica , 2002, DOI: 10.1590/S0102-33062002000200007
Abstract: the objective of was a to analise the phytosociological parameters of a semideciduous forest fragment in a secondary forest, s?o carlos, s?o paulo state (21o 55" s and 47o 48" w). fifty plots of 10 m x 20 m (200 m2) were established and distributed perpendiculary to a path in the forest fragment. trees with a breast height of at least 5 cm of diameter (dbh) were tagged, measured, and identified. 1,343 individuals were sampled in the phytosociologic study. the species with the highest importance value (iv) were: metrodorea nigra (33.09%), pachystroma longifolium (22.64%), aspidosperma ramiflorum (20.41%), actinostemon communis (17.38%), croton floribundus (12.70%), savia dictyocarpa (12.14%), ocotea pretiosa (10.24%) and machaerium stipitatum (10.01%), that together comprised 46.20% of total iv and while the 92 remaining species comprised 53.80%.
Composi??o florística de um fragmento de floresta estacional semidecídua no município de S?o Carlos-SP
Silva, Luciana álvares da;Soares, Jo?o Juares;
Revista árvore , 2003, DOI: 10.1590/S0100-67622003000500007
Abstract: this study aimed to carry out a floristic survey of a semideciduous forest. the area is a secondary forest, located in s?o carlos, sp, coordinates 21o55'' s and 47o48'' w. the annual average rain precipitation is 1,440 mm. the annual average temperature varies from 15.63 oc to 26.82 oc. in the floristic survey 146 species were identified, distributed within 44 families and 96 genera. the shannon-wiener diversity index (h') was 3.45 nats/ind. there was little similarity with other forest fragments of similar vegetation in the state of s?o paulo, by the s?rensen index.
Levantamento fitossociológico em um fragmento de floresta estacional semidecídua, no município de S o Carlos, SP
Silva Luciana álvares da,Soares Jo?o Juares
Acta Botanica Brasilica , 2002,
Abstract: O presente trabalho teve por objetivo a análise de parametros fitossociológicos em um fragmento de floresta estacional semidecídua, no município de S o Carlos - SP, situado entre 21o 55' e 22o 00' Sul e 47o 48' e 47o 52' Oeste. Para o levantamento da vegeta o foram estabelecidas 50 parcelas de 10 m x 20 m (200 m2), distribuídas perpendicularmente a uma trilha existente no interior do fragmento. Em cada parcela foram amostrados todos os indivíduos com diametro à altura do peito (DAP) igual ou maior a 5cm, onde foi medido o diametro, a altura, anotado o nome da espécie e coletado material para herboriza o. Foram encontrados 1343 indivíduos por hectare. As espécies que apresentaram maior valor de importancia (VI) foram: Metrodorea nigra (33,09%), Pachystroma longifolium (22,64%), Aspidosperma ramiflorum (20,41%), Actinostemon communis (17,38%), Croton floribundus (12,70%), Savia dictyocarpa (12,14%), Ocotea pretiosa (10,24%) e Machaerium stipitatum (10,01%), que juntas somaram 46,20% do VI total e as 92 espécies restantes somaram 53,80%.
Composi o florística de um fragmento de floresta estacional semidecídua no município de S o Carlos-SP
Silva Luciana álvares da,Soares Jo?o Juares
Revista árvore , 2003,
Abstract: O presente trabalho teve por objetivo o levantamento florístico de um fragmento de floresta estacional semidecídua com aproximadamente 112 ha, localizado no município de S o Carlos-SP, entre 21o55' e 22o00' sul e 47o48' e 47o52' oeste. A precipita o média anual é de 1.440 mm. As temperaturas médias mensais variam de 15,63 oC (das mínimas) a 26,82 oC (das máximas) no ano. No levantamento florístico foram encontradas 146 espécies, pertencentes a 44 famílias e 96 gêneros, devendo ser ressaltado que 12 taxa foram identificados em nível de gênero e nove plantas n o foram identificadas. O índice de diversidade de Shannon-Wiener foi de 3,45 nats/ind. A compara o com outras forma es florestais semelhantes no Estado de S o Paulo, pelo índice de similaridade de Sorensen, mostrou-se baixa.
FOR A DEFINITION OF THE TEACHING/LEARNING OF WRITING IN L1: RESEARCH AND ACTION
LUíSA áLVARES PEREIRA,INêS CARDOSO,LUCIANA GRA?A
L1 Educational Studies in Language and Literature , 2009,
Abstract: With this article we hope to contribute towards the definition of the field of the Didactics ofWriting in Portugal, an area which has been developing, essentially, since the mid 90s, in order to defineboth the problems surrounding research in this area, as well as the contents used in the teaching and learningof writing which result from the former. It is not our objective to go into detail concerning the state ofthe art in this field in Portugal; our purpose is to present the main perspectives which have emergedthroughout recent years, defining an area which is currently beginning to show signs of greater definition.Thus, we shall attempt to provide some answers to the following research questions: what context encouragedthe emergence of this area of study, how has the configuration of this field been perceived, whattheoretical references sustain the empirical research underlying this development? In order to answerthese research questions, three analysis axes were considered which, from our viewpoint, aggregate theresearch themes within the Didactics of Writing. In the first analysis axis, the objective is to present a setof findings centred on the processes underlying students’ activity of writing texts, focusing more specificallyon the development of textual revision competence. In the second analysis axis, the aim is to validatethe emergence of a research line which is pertinent to the Didactics of Writing, focusing on the relevanceof teachers and students’ relationship with writing. In the third analysis axis, we present an illustrativelayout of a research line which demonstrates the relevance of understanding the teacher’s actionwhen working with text genres. Subsequently, we shall demonstrate the way in which these three axescan configure a referential in the definition of a global teaching and learning model for writing, capable ofproviding guidelines for classroom action. Finally, we shall discuss some research directions which sustainthe validity of this model.
Weedy and secundary palm species in central amazonian forest Fragments
Scariot, Aldicir;
Acta Botanica Brasilica , 2001, DOI: 10.1590/S0102-33062001000200012
Abstract: forest fragmentation may affect the abundance and distribution of organisms. some species populations decrease being eventually driven to local extinction while other species may experience population increase. in a survey of the composition and abundance of secondary and weedy palms in eight forest fragments (three of 1-, three of 10- and two of 100-ha), in three sites (dimona, porto alegre and esteio) in central amazonia, five native palm species which do not occur in the continuous forest were identified. three were secondary species (astrocaryum acaule mart., bactris maraja mart. var. maraja and bactris sp), one weedy (lepidocaryum tenue mart.), and one of unknown status (b. oligocarpa barb. rodr. & trail). the highest abundance was found in the 1-ha fragments which had 172 of the 206 palms found compared with 33 in the 10-ha and one in the 100-ha fragments. however, most of these palms occur in the dimona site, which accounted for 195 of the 206 of the individuals, compared with seven in esteio and four in porto alegre. the weedy l. tenue, which forms clonal populations, although occurring only in dimona, accounted for 91% of the individuals recorded. it is possible that with increased habitat degradation of small fragments, some populations of secondary and weedy species will also increase, what may be detrimental to the closed forest plant species populations occurring in forest fragments.
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