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Florística, fitossociologia e dinâmica de duas florestas secundárias antigas com histórias de uso diferentes no nordeste do Pará-Brasil. ; Floristic, phitosociology and dinamic of two old secondary forests with different history of use in the northeastern Pará-Brazil.

Melo, Marcelo Santos
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Dissertação de Mestrado Formato: application/pdf
Publicado em 24/09/2004 PT
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56.53%
O incremento do processo de substituição da floresta amazônica por áreas agrícolas e seu posterior abandono, têm resultado num número crescente de fragmentos de florestas secundárias. Com o objetivo de contribuir com o entendimento da dinâmica dessas áreas, analisou-se a composição florística, a fitossociologia, o ingresso, a mortalidade, o crescimento dos indivíduos arbóreos e as relações do solo com o crescimento em diâmetro, densidade e área basal total de duas florestas secundárias (Marituba e Bragança, NE, PA) com diferentes histórias de degradação e mesma idade de abandono. Foram instaladas 4 parcelas permanentes de 50x50m, subdivididas em 25 com de 10x10m, em cada área, onde amostrou-se todas as árvores com DAP >5cm. Em Marituba as medições foram em 1997, 2000 e 2002, e em Bragança, 1999, 2000, 2001 e 2002. O solo foi coletado nas profundidades de 0- 5cm, 5-15cm e 15-25cm, nas subparcelas pares das áreas. No primeiro levantamento de Marituba foram encontrados 1.257 indivíduos e 185 espécies. No último levantamento houve redução de 4,1% de indivíduos e aumento de 8,1% de espécies, com H´ = 4,42nats/indivíduo. Em Bragança, foram encontrados em 1999, 1.819 indivíduos e 136 espécies. No último levantamento...

Composição florística da comunidade de lianas lenhosas em duas formações florestais do estado de São Paulo; Floristic composition of the woody liana community in two forest formations of São Paulo state

Udulutsch, Renata Giassi
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Dissertação de Mestrado Formato: application/pdf
Publicado em 16/03/2004 PT
Relevância na Pesquisa
66.47%
Tendo em vista a necessidade de se estudar as formações florestais do Estado de São Paulo de forma mais detalhada, a fim de que sua composição florística seja definida e seu processo de dinâmica compreendido, este estudo tem como objetivos principais: levantar e identificar as espécies de lianas lenhosas ocorrentes em um trecho de Floresta Ombrófila Densa do Parque Estadual Carlos Botelho (P.E.C.B.) e outro de Floresta Estacional Semidecídua da Estação Ecológica dos Caetetus (E.E.C.) e produzir um guia ilustrado de campo incluindo fotografias e diagnoses para as espécies de lianas lenhosas encontradas nas sub-parcelas amostradas e chaves de identificação baseadas em caracteres vegetativos. Foram sorteadas, para as duas áreas, 50 sub-parcelas de 20 X 20 m das 256 pertencentes ao projeto temático "Diversidade, dinâmica e conservação de florestas no Estado de São Paulo: 40 ha de parcelas permanentes". Também foram realizadas coletas aleatórias por trilhas e na borda dos fragmentos. Foram consideradas lianas todas as plantas que necessitavam de um suporte para o seu desenvolvimento e que mantinham contato permanente com o solo. Foram encontradas 76 espécies de lianas lenhosas para a E.E.C., distribuídas por 52 gêneros e 19 famílias e...

Composição florística de uma pastagem natural submetida a queima e manejos alternativos; Burning and management alternatives on floristic composition of native pasture

Heringer, Ingrid; Jacques, Aino Victor Avila
Fonte: Universidade Federal do Rio Grande do Sul Publicador: Universidade Federal do Rio Grande do Sul
Tipo: Artigo de Revista Científica Formato: application/pdf
POR
Relevância na Pesquisa
56.58%
Foram estudadas, durante um ano, alternativas de manejo da pastagem natural em relação às queimadas. Os tratamentos constaram de: queima bienal durante mais de 100 anos; sem queima há 32 anos, com e sem roçada; e melhorado com correção e adubação do solo, e introdução de espécies há 7 e 24 anos. A pastagem acumulada, dentro de gaiolas de exclusão ao pastejo, foi coletada e separada manualmente em grupos de espécies. A composição florística foi estimada pelo método BOTANAL, através da freqüência e cobertura das espécies presentes ao longo de transectas. O delineamento experimental foi o completamente casualizado, com três repetições. O melhoramento da pastagem favoreceu boas espécies forrageiras do grupo das gramíneas nativas estivais, ciperáceas e leguminosas. A queima promoveu o desenvolvimento de Piptochaetium montevidense em detrimento das gramíneas estivais, leguminosas e material morto. Paspalum notatum, P. paniculatum e Desmodium incanum se sobressaíram nas áreas melhoradas e roçadas. Na área queimada, houve melhor desenvolvimento de espécies dos gêneros Andropogon e Schizachyrium e também de espécies oportunistas. As alternativas de manejo sem queima, com pastejo rotativo e diferimento promovem o desenvolvimento de uma riqueza florística maior e de espécies com melhor valor forrageiro.; The botanical and floristic composition of native pasture...

Relações florísticas da vegetação lenhosa nas Florestas com Araucária no Sul do Brasil; Floristic relations of woody vegetation in Araucaria forests in southern Brazil

Streit, Helena
Fonte: Universidade Federal do Rio Grande do Sul Publicador: Universidade Federal do Rio Grande do Sul
Tipo: Trabalho de Conclusão de Curso Formato: application/pdf
POR
Relevância na Pesquisa
56.6%
A floresta com araucária é encontrada formando áreas contínuas em contato com campo nativo nos estados do Sul e Sudeste do Brasil. Apesar do Planalto Sul-Brasileiro ser amplamente reconhecido como o limite sul da floresta com araucária, há registros da ocorrência de Araucaria angustifolia juntamente com Podocarpus lambertii, formando dosséis contínuos em áreas da Serra do Sudeste, bem como em manchas florestais em avanço sobre campo nativo. Apesar da presença da araucária, as florestas da Serra do Sudeste são classificadas de maneira geral como estacionais. Nosso objetivo foi analisar as relações florísticas e similaridades ambientais entre as florestas com araucária na Serra do Sudeste com a floresta com araucária no seu limite amplamente aceito e com outras formações florestais do entorno, como as florestas estacionais e atlânticas. Verificamos uma separação entre as florestas com araucária e as florestas da Serra do Sudeste através de fatores ambientais como altitude, precipitação e temperatura. O padrão de agrupamento de sítios foi influenciado também pelas diferentes composições florísticas das diferentes regiões. Mesmo com a ocorrência de A. angustifolia e P. lambertii em sítios da Serra do Sudeste...

An analysis of the floristic composition and diversity of Amazonian forests including those of the Guiana Shield

Ter Steege, H.; Sabatier, D.; Castellanos, H.; Van Andel, T.; Duivenvoorden, J.; De Oliveira, A. A.; Ek, R.; Lilwah, R.; Maas, P.; Mori, S.
Fonte: Cambridge University Press Publicador: Cambridge University Press
Tipo: Revisão Formato: 801-828
ENG
Relevância na Pesquisa
56.47%
A large number of newly published and unpublished hectare plots in Amazonia and the Guiana Shield area allow an analysis of family composition and testing of hypotheses concerning alpha-diversity in the south American rain forest. Using data from 94 plots the family-level floristic patterns in wet tropical South America are described. To test diversity patterns, 268 plots are used in this large area. Contrary to a widely held belief, western Amazonian plots are not necessarily the most diverse. Several central Amazonian plots have equal or even higher tree diversity. Annual rainfall is not a good estimator for tree diversity in the Amazonia area and Guiana shield. Plots in the Guiana Shield area (and eastern Amazonia) usually have lower diversity than those in central or western Amazonia. It is argued that this is not because of low rainfall or low nutrient status of the soil but because of the small area of the relatively isolated rain forest area in eastern Amazonia and the Guiana Shield. The low diversity on nutrient-poor white sand soils in the Amazon basin is not necessarily due to their Low nutrient status but is, at least partly, caused by their small extent and fragmented nature.

Floristic composition of the tree stratum of a semideciduous mesophytic forest in the municipality of Botucatu, São Paulo state

Gabriel, JLC; Pagano, S. N.
Fonte: Inst Tecnologia Parana Publicador: Inst Tecnologia Parana
Tipo: Artigo de Revista Científica Formato: 185-206
POR
Relevância na Pesquisa
56.41%
The floristic composition was studied in an area of semideciduous mesophytic forest, with 120 ha, in the municipality of Botucatu, SP, Brazil. This forest lies on the ascent of the Cuesta of Botucatu. Due to the heterogeneity of the relief, for the sampling process, the forest was divided in three regions: the upper one (comprising the strip of forest on the plateau), middle on (the forestal area lied on the ascent properly said) and the lower one (the strip of forest on the plain). The tree sampling regions showed some differences among them and this must be connected to the differences in the soil.

VEGETATION STRUCTURE AND COMPOSITION OF ROAD

Santos, Sara M; Mathias, Maria da Luz; Mira, António; Simões, M Paula
Fonte: Universidade de Évora Publicador: Universidade de Évora
Tipo: Artigo de Revista Científica Formato: 9834 bytes; application/pdf
ENG
Relevância na Pesquisa
56.51%
This paper analyses the floristic composition and vegetation structure in road verge and meadow sites colonized by Cabrera vole (Microtus cabrerae Thomas, 1906), a threatened rodent with fragmented distribution in the Iberian Peninsula. Vegetation was sampled in 26 colonized patches in five geographical areas of Southern Portugal. The cover of the herbaceous layer was sampled in 1 × 1 m plots. Several variables related to plant diversity, Raunkiaer lifeforms, taxonomic groups, disturbance and soil properties were assessed. Floristic composition of the herbaceous communities of road verge and meadow sites was different. Indicator species of road verges corresponded mainly to annual grasses and forbs, ruderal and nitrophilous species, along with a few perennials. In meadows, perennial grasses and moisture indicative species were more common. Results suggest that road verges are lower quality habitats for Cabrera vole maintenance, due to high disturbance, low moisture availability during summer and reduced patch surface. Nevertheless, they might provide benefits such as extra foraging and refuge, especially in disturbed areas. Potential ecological effects of road verge management are discussed in the light of species conservation goals.

VEGETATION STRUCTURE AND COMPOSITION OF ROAD VERGE AND MEADOW SITES COLONIZED BY CABRERA VOLE (MICROTUS CABRERAE THOMAS)

Santos, Sara; Mathias, Maria da Luz; Mira, António; Simões, Maria Paula
Fonte: Universidade de Évora Publicador: Universidade de Évora
Tipo: Artigo de Revista Científica Formato: 253256 bytes; application/pdf
ENG
Relevância na Pesquisa
56.51%
This paper analyses the floristic composition and vegetation structure in road verge and meadow sites colonized by Cabrera vole (Microtus cabrerae Thomas, 1906), a threatened rodent with fragmented distribution in the Iberian Peninsula. Vegetation was sampled in 26 colonized patches in five geographical areas of Southern Portugal. The cover of the herbaceous layer was sampled in 1 × 1 m plots. Several variables related to plant diversity, Raunkiaer lifeforms, taxonomic groups, disturbance and soil properties were assessed. Floristic composition of the herbaceous communities of road verge and meadow sites was different. Indicator species of road verges corresponded mainly to annual grasses and forbs, ruderal and nitrophilous species, along with a few perennials. In meadows, perennial grasses and moisture indicative species were more common. Results suggest that road verges are lower quality habitats for Cabrera vole maintenance, due to high disturbance, low moisture availability during summer and reduced patch surface. Nevertheless, they might provide benefits such as extra foraging and refuge, especially in disturbed areas. Potential ecological effects of road verge management are discussed in the light of species conservation goals.

Diversity and floristic patterns of mediterranean grasslands: the relative influence of environmental and land management factors

Ribeiro, Sílvia; Fernandes, João Paulo; Espírito Santo, Dalila
Fonte: Biodiversity and Conservation . 06/2014; DOI: 10.1007/s10531-014-0754-y Publicador: Biodiversity and Conservation . 06/2014; DOI: 10.1007/s10531-014-0754-y
Tipo: Artigo de Revista Científica
POR
Relevância na Pesquisa
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Managed grasslands are normally ecosystems with high species diversity. They are associated with traditional extensive livestock grazing. Land-use changes, in particular gradual abandonment or grazing intensification, lead to major changes in floristic patterns of these grasslands, some included in priority habitats of the EU Habitats Directive. In order to analyse these patterns of change, Mediterranean grasslands of eastern areas of mainland Portugal were studied aiming to: (1) establish ecological gradients underlying their floristic patterns; (2) examine the relative importance of both environmental and landuse factors on their floristic composition; (3) assess how floristic composition and species richness are affected by land-use factors. Vegetation sampling was carried out from 2008 to 2009 following phytosociological procedures. Canonical Correspondence Analysis was applied. Variation partitioning was used to assess the relative influence of land-use variables. Richness, legumes cover, endemic species and bryophytes cover were compared in four land-management regimes: unmanaged; extensive grazing by sheep; extensive grazing by cattle and sheep; frequent soil tillage. Significant differences were found in floristic and diversity patterns...

Floristic composition and topographic variation in a tidal floodplain forest in the Amazon Estuary

CATTANIO,JOSÉ H.; ANDERSON,ANTHONY B.; CARVALHO,MANOEL S.
Fonte: Sociedade Botânica de São Paulo Publicador: Sociedade Botânica de São Paulo
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em // EN
Relevância na Pesquisa
56.63%
Slight topographic variations appear to exert dramatic effects on the structure of forests subject to inundation. In a late successional tidal floodplain forest near the Amazon port of Belém, Brazil, we examined these effects by studying floristic composition along a topographic gradient. We predicted that, relative to high sites, low sites would be characterized by high representation of life forms and taxa characteristic of inundated sites. We found striking variations in floristic composition along a slight topographic gradient. In comparison with topographically high sites, low sites were characterized by a high representation of Palm trees (Arecaceae), low diversity of trees and lianas, and high plant density. These variations appear to reflect edaphic limitations imposed by periodic flooding. The high spatial variation in floristic composition found in this ecosystem suggest caution in implementing intensive forms of agriculture.

Influence of harvest season, cutting frequency and nitrogen fertilization of mountain meadows on yield, floristic composition and protein content of herbage

Brum,Olívio Bochi; López,Secundino; García,Ricardo; Andrés,Sonia; Calleja,Alfredo
Fonte: Sociedade Brasileira de Zootecnia Publicador: Sociedade Brasileira de Zootecnia
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/04/2009 EN
Relevância na Pesquisa
66.51%
The aim of the present study was to investigate the influence of cutting frequency, harvest season and nitrogen fertilization on yield and floristic composition of the herbage harvested from a mountain meadow. The meadow was divided into 22 plots, each receiving a different N P K fertilization treatment. The study lasted seven years, and during the first three years (1985-1987) each plot was harvested twice per year (June and September) according to a traditional harvest system, whereas in the years 1989-1991 each plot was harvested three times per year (spring, summer and autumn) following a more intensive harvest system. Nitrogen fertilizer favoured the development of the grasses in spring, thus reducing the proportion of legumes in the two cut harvest system, whereas grasses reached an advanced stage of maturity before the first cut in late June. However, the three cut harvest system entailed an earlier first cut in spring. As a result, the production of legume biomass was significantly increased both in the first cut and in the subsequent regrowths. No significant response in total herbage production to the N fertilizer was observed in the more intensive harvest system. Therefore, the three cut harvest system without nitrogen fertilization seemed to be the most suitable practice for the management of these botanically-complex mountain meadows. These results may contribute to design fertilization and management practices of mountain hay meadows to optimize their productivity and sustainability.

Dissecting the Effects of Simulated Cattle Activity on Floristic Composition and Functional Traits in Mediterranean Grasslands

Dobarro, Iker; Pérez Carmona, Carlos; Peco, Begoña
Fonte: Public Library of Science Publicador: Public Library of Science
Tipo: Artigo de Revista Científica
Publicado em 20/11/2013 EN
Relevância na Pesquisa
46.7%
Livestock exerts direct and indirect effects on plant communities, changing colonization and extinction rates of species and the surrounding environmental conditions. There is scarce knowledge on how and to what extent these effects control the floristic and functional composition of plant communities in grasslands. We performed an experiment that included several treatments simulating trampling, defoliation, faeces addition and their combinations in a Mediterranean scrub community grazing-abandoned for at least 50 years. We monitored the plots for four years, and collected data on species composition, photosynthetically active radiation (PAR) and red∶far-red ratio (R∶FR), soil moisture and compaction. We estimated community weighted means (CWM) for height, habit, life cycle, seed mass and SLA. Neither compaction nor soil moisture were modified by the treatments, while PAR and R∶FR increased in all treatments in comparison to the Control and Faeces treatments. The floristic composition of all treatments, except for Faeces, converged over time, but deviated from that of the Control. The functional traits displayed the trends expected in the presence of grazing: loss of erect species and increased cover of short species with light seeds...

Changes in the floristic composition of a Terra Firme rain forest In Brazilian Amazonia over an eight-year period In response to logging

CARVALHO,João Olegário Pereira de
Fonte: Instituto Nacional de Pesquisas da Amazônia Publicador: Instituto Nacional de Pesquisas da Amazônia
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/06/2002 EN
Relevância na Pesquisa
66.66%
Changes in the floristic composition over an eight-year period in a logged area at the Tapajós National Forest in Brazilian Amazonia arc discussed. Two treatments of different intensities of logging were compared with an undisturbed (control) forest. Data were collected from permanent sample-plots. The effects of logging on floristic composition were stronger in the more heavily logged treatment. The number of species decreased immediately after logging, but started to increase before the fifth year after logging and was higher at the end of the study period than before logging. The more heavily logged plots responded more to disturbances, as judged by the increase in the number of species during the period after logging. This forest appears to recover its initial floristic composition after disturbance without intervention.

Florística e estrutura da comunidade arbórea de duas áreas de Cerrado Sentido Restrito no norte de Minas Gerais; Floristic composition and wood community structure of two cerrado stricto sensu areas on North of Minas Gerais

Costa, Fernanda Vieira da; Oliveira, Karla Nunes; Nunes, Yule Roberta Ferreira; Menino, Gisele Cristina de Oliveira; Brandão, Diego Oliveira; Araújo, Lucimar Soares de; Miranda, Weslane Oliveira; D'Ângelo Neto, Santos
Fonte: UFLA - Universidade Federal de Lavras Publicador: UFLA - Universidade Federal de Lavras
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 30/04/2015 PT
Relevância na Pesquisa
56.48%
This study aimed to compare floristic composition and the phytosociological structure between two fragments of stricto sensu cerrado in Grão Mogol, North of Minas Gerais, Brazil. The tree communities were evaluated using the quarter point method. In each fragment, points were distributed equidistant 10 m among them along six transects of 70 m, totaling 48 points per fragment. It was measured, in each point, the height, CBH of four plants to the corresponding quarters in relation to central point. It was considered the individual trees sampled with DHB > 3 cm and height > 1.5 m. It was sampled a total of 73 species in the two fragments, being 48 species in fragment 1, distributed in 41 genera and 24 families, while 54 species were found in fragment 2, distributed in 47 genera and 28 families. The most representative families were Fabaceae and Vochysiaceae. The total density estimated for the fragment 1 was 1275.51 ind. ha-1 and 1580.58 ind. ha-1 to the fragment 2. In both fragments, Qualea parviflora and Eriotheca pubescens showed the highest importance value (IVI). The diversity (H') and equability (J) values were 3.13 and 0.87 for fragment 1, and 3.27 and 0.84 for fragment 2, respectively. The Sorensen's similarity index was 0.68. The diameter and height distribution of the study communities presented inverted-J form...

Vegetation mapping in an area of Ombrophilous Dense Forest at Parque Estadual da Serra do Mar, São Paulo State, Brazil, and floristic composition of the tree component of some physiognomies*; Mapeamento da vegetação em área de Floresta Ombrófila Densa no Parque Estadual da Serra do Mar, SP, Brasil, e composição florística do componente arbóreo de algumas fisionomias

Medeiros, Maria Cláudia Melo Pacheco de; Mattos, Isabel Fernandes de Aguiar; Kanashiro, Marina Mitsue; Tamashiro, Jorge Yoshio; Aidar, Marcos Pereira Marinho
Fonte: Instituto de Botânica Publicador: Instituto de Botânica
Tipo: Artigo de Revista Científica
ENG
Relevância na Pesquisa
56.48%
This study aimed to map phytophysiognomies of an area of Ombrophilous Dense Forest at Parque Estadual da Serra do Mar and characterize their floristic composition. Photointerpretation of aerial photographs in scale of 1:35,000 was realized in association with field work. Thirteen physiognomies were mapped and they were classified as Montane Ombrophilous Dense Forest, Alluvial Ombrophilous Dense Forest or Secondary System. Three physiognomies identified at Casa de Pedra streamlet's basin were studied with more details. Riparian forest (RF), valley forest (VF), and hill forest (HF) presented some floristic distinction, as confirmed by Detrended Correspondence Analysis (DCA) and Indicator Species Analysis (ISA) conducted here. Anthropic or natural disturbances and heterogeneity of environmental conditions may be the causes of physiognomic variation in the vegetation of the region. The results presented here may be useful to decisions related to management and conservation of Núcleo Santa Virgínia forests, in general.; The authors would like to acknowledge the Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) for the scholarship awarded to first author; the Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) for the funding for the projects "Composição florística...

Vegetation mapping in an area of Ombrophilous Dense Forest at Parque Estadual da Serra do Mar, São Paulo State, Brazil, and floristic composition of the tree component of some physiognomies*

Medeiros,Maria Cláudia Melo Pacheco de; Mattos,Isabel Fernandes de Aguiar; Kanashiro,Marina Mitsue; Tamashiro,Jorge Yoshio; Aidar,Marcos Pereira Marinho
Fonte: Instituto de Botânica Publicador: Instituto de Botânica
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/06/2012 EN
Relevância na Pesquisa
56.48%
This study aimed to map phytophysiognomies of an area of Ombrophilous Dense Forest at Parque Estadual da Serra do Mar and characterize their floristic composition. Photointerpretation of aerial photographs in scale of 1:35,000 was realized in association with field work. Thirteen physiognomies were mapped and they were classified as Montane Ombrophilous Dense Forest, Alluvial Ombrophilous Dense Forest or Secondary System. Three physiognomies identified at Casa de Pedra streamlet's basin were studied with more details. Riparian forest (RF), valley forest (VF), and hill forest (HF) presented some floristic distinction, as confirmed by Detrended Correspondence Analysis (DCA) and Indicator Species Analysis (ISA) conducted here. Anthropic or natural disturbances and heterogeneity of environmental conditions may be the causes of physiognomic variation in the vegetation of the region. The results presented here may be useful to decisions related to management and conservation of Núcleo Santa Virgínia forests, in general.

Floristic composition and community structure of epiphytic angiosperms in a terra firme forest in central Amazonia

Irume,Mariana Victória; Morais,Maria de Lourdes da Costa Soares; Zartman,Charles Eugene; Amaral,Iêda Leão do
Fonte: Sociedade Botânica do Brasil Publicador: Sociedade Botânica do Brasil
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/06/2013 EN
Relevância na Pesquisa
56.47%
This survey aimed to describe the floristic composition and structure of the epiphytic community occurring in a terra firme forest in the city of Coari, Brazil, in the Amazon region. Data collection was performed with a 1.5 ha plot method, with which upland, slope and lowland habitats were sampled. All angiosperm epiphytes and their host plants (diameter at breast height > 10 cm) were sampled. We recorded 3.528 individuals in 13 families, 48 genera and 164 species. Araceae was the most prevalent family with regard to the importance value and stood out in all related parameters, followed by Bromeliaceae, Cyclanthaceae and Orchidaceae. The species with the highest epiphytic importance values were Guzmania lingulata (L.) Mez. and Philodendron linnaei Kunth. The predominant life form was hemiepiphytic. Estimated floristic diversity was 3.2 (H'). The studied epiphytic community was distributed among 727 host plants belonging to 40 families, 123 genera and 324 species. One individual of Guarea convergens T.D. Penn. was the host with the highest richness and abundance of epiphytes. Stems/trunks of host plants were the most colonized segments, and the most favorable habitat for epiphytism was the lowlands, where 84.1% of species and 48.2% of epiphytic specimens were observed.

Floristic composition of three successional stages of a riparian forest in the municipality of Arroio do Padre, very south of Brazil; ASPECTOS FLORÍSTICOS DE TRÊS ESTÁGIOS SUCESSIONAIS DE MATA CILIAR EM ARROIO DO PADRE, EXTREMO SUL DA MATA ATLÂNTICA

Venzke, Tiago Schuch; UFPEL - UFV; Martins, Sebastião Venâncio
Fonte: FUPEF DO PARANÁ Publicador: FUPEF DO PARANÁ
Tipo: info:eu-repo/semantics/article; info:eu-repo/semantics/publishedVersion; Artigo Avaliado pelos Pares Formato: application/pdf
Publicado em 02/07/2013 POR
Relevância na Pesquisa
46.81%
AbstractThis research aims to characterize composition and floristic relations of three successional stages of a Riparian Semi-deciduous Seasonal Forest, in the municipality of Arroio do Padre, South of Brazil. The sample area was divided into 0.2 ha for ‘capoeira’ (five years of regeneration), 0.5 ha for secondary forest (45 years for regeneration), and 0.5 ha for mature forest (primary forest). Richness in the three succession stages included 72 species distributed into 52 genera and 33 families. ‘Capoeira’ presented lower quantity of taxa, whereas in the mature forest occurred greater number of species (49) and exclusive species (20). The floristic composition was influenced by successional stage and classification of plots by the similarity analysis clusters formed as the regeneration time. Differences in floristic composition reflect community adaptation to the conditions provided along succession. These variations reveal that the age of the succession reflects in forest floristic, and strategies for forest restoration should consider species adapted to successional stages in order to maximize native forests reforestation projects.Keywords: Municipality of Pelotas; Semi-deciduous Seasonal Forest; forest ecology.;  O objetivo foi caracterizar a composição e as relações florísticas de estágios sucessionais de uma mata ciliar em um fragmento de Floresta Estacional Semidecidual no Município de Arroio do Padre...

Floristic composition and structure of an urban forest remnant of Fortaleza, Ceará; Floristic composition and structure of an urban forest remnant of Fortaleza, Ceará

Diogo, Ivan Jeferson Sampaio; Holanda, Alexandre Emanuel Regis; Oliveira Filho, Aldízio Lima de; Bezerra, Carlos Lineu Frota
Fonte: Programa de Pós Graduação em Desenvolvimento e Meio Ambiente – PRODEMA Publicador: Programa de Pós Graduação em Desenvolvimento e Meio Ambiente – PRODEMA
Tipo: info:eu-repo/semantics/article; info:eu-repo/semantics/publishedVersion; Formato: application/pdf
Publicado em 23/12/2014 POR
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The northeastern Brazil coastal region has some vegetation fragments in the pre-litoranean plains, locally called Tabuleiro forests. Our knowledge of the vascular plant flora of these forests is poor. This study describes the structure and floristic composition of a remnant forest into the city and its main aim is determinate the floristic composition and indicate the preservation condition of the forest. To carry out the inventory, two areas of 0.25ha were chosen (wet and dry) and we marked 25 points quadrats for each. Al trees > 150 cm height and ≥ 5 cm DBH were sampled, numbered and identificated. We found 200 trees and shrubs belonging to 27 species, 26 genera and 18 families; the total number of species recorded rose to 116 species, representing 100 genera and 49 families when we joined this result to different studies in the same area. The families with higher number of species were Fabaceae (18), Rubiaceae (14), Asteraceae (9) and Malvaceae (8). The wet and dry areas were very similar floristically (0.43 and 0.58, Jaccard and Sorensen respectively), having 12 species in common. The average distance and the total density of the study area (0.5ha) was 3.27m ± 0.23 and 980 ind./ha respectively. For the diameter, we found an average value of 14.53cm ± 5.6 and...

Composition and conservation of Orchidaceae on an inselberg in the Brazilian Atlantic Forest and floristic relationships with areas of Eastern Brazil

Soares Pessanha,Alexandre; Menini Neto,Luiz; Campostrini Forzza,Rafaela; Nascimento,Marcelo
Fonte: Revista de Biología Tropical Publicador: Revista de Biología Tropical
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/06/2014 EN
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The Brazilian Atlantic Forest presents high levels of richness and endemism of several taxonomic groups. Within this forest, the Orchidaceae may be highlighted as the richest family of Angiosperms found there, and is highly threatened due to collection and habitat destruction. The inselbergs of the Brazilian Atlantic Forest are mostly unknown regarding their floristic composition, but the available information points to occurrence of endemic species, with adaptations to survive to this dry environment. The objectives of this study were to con-duct a floristic survey of the Orchidaceae species on the Maciço do Itaoca, an inselberg located in the Northern region of the State of Rio de Janeiro, make a comparative analysis with other sites in Eastern Brazil, and discuss the geographic distribution, floristic relationships and conservation status of the orchid species present on the inselbergs. The floristic composition of the study area was compared with 24 other locations in Eastern Brazil (of which 13 are inselbergs) and the influence of the types of surrounding vegetation on the composition of the Orchidaceae flora on the inselbergs. On Maciço do Itaoca we recorded 18 species from 17 genera: Brasiliorchis picta, Brassavola tuberculata...