Araucaria
Mostrando 37-48 de 666 artigos, teses e dissertações.
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37. Permineralized conifer-like leaves from the Jurassic of Patagonia (Argentina) and its paleoenvironmental implications
Abstract Abstract: Anatomically preserved conifer-like leaves from the Middle Jurassic La Matilde Formation at the Barda Blanca locality in the Gran Bajo de San Julián area, southern Patagonia are described here. Leaves are assigned to conifers based on the following foliar features: thick-walled epidermal cells, a sclerenchymatic hypodermis, resin canals a
An. Acad. Bras. Ciênc.. Publicado em: 06/05/2019
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38. The last giant Araucaria trees in southern Brazil
ABSTRACT: Araucaria angustifolia (Bertol.) Kuntze is a native tree species of major importance in southern Brazil. It is a regional symbol due to its iconic shape and stature in the landscape; its wood was once economically important and its seeds are an important source of food for the fauna and are presently used in regional cuisine. Despite its importance
Sci. agric. (Piracicaba, Braz.). Publicado em: 2019-05
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39. Community structure and tree diversity in a subtropical forest in southern Brazil
Resumo: Variações ambientais locais e regionais levam à composição de espécies diferentes e áreas de transições. Um exemplo é a floresta com araucária e a floresta estacional no sul do Brasil. Nossos objetivos foram (1) descrever a composição e estrutura da comunidade arbórea de uma floresta subtropical no sul do Brasil e (2) comparar as relaç
Biota Neotrop.. Publicado em: 18/03/2019
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40. Species diversity, community structure and ecological traits of trees in an upper montane forest, southern Brazil
ABSTRACT Upper montane ecosystems in Brazil are little known, and their structural and functional aspects poorly understood. Our goals were to describe tree species diversity and community structure, and to characterize tree species in relation to their ecological traits, phytogeographic history and conservation status in an upper montane araucaria forest re
Acta Bot. Bras.. Publicado em: 2019-03
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41. Brazilian Pine (Araucaria angustifolia (Bertol.) Kuntze) Ethnoecology in the Mantiqueira Atlantic Forest
ABSTRACT Araucaria angustifolia is under the domain of the Atlantic Forest, classified as Mixed Ombrophilous Forest (FOM). It is a native species critically threatened due to the intense exploration, to the point of exhaustion, of its natural reserves. This study aims to present the ethnoecological knowledge regarding this species in a community located in t
Floresta Ambient.. Publicado em: 14/02/2019
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42. Forests of the Iguaçu National Park: Structure, Composition, and Richness
Abstract Considering the importance of the Iguaçu National Park for the conservation of the Atlantic Forest and the absence of scientific or technical studies characterizing the ecology of forest species after seven and a half decades of its existence, a phytosociological survey of the arboreal vegetation was conducted to identify the various existing spec
Floresta Ambient.. Publicado em: 13/12/2018
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43. Análise termogravimétrica para caracterização dos pellets produzidos com diferentes resíduos florestais e agrícolas
RESUMO: A peletização de resíduos florestais e agrícolas tem sido uma alternativa na obtenção de produtos com maior valor agregado para a geração de energia, pois muitos resíduos podem ser utilizados neste processo. Assim, o objetivo deste estudo foi avaliar a qualidade energética dos pellets produzidos com resíduos florestais e agrícolas como m
Cienc. Rural. Publicado em: 22/10/2018
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44. Contraste fitossociológico de samambaias e licófitas de fragmentos florestais com diferentes matrizes de entorno no sul do Brasil
Resumo Bordas florestais tipicamente exibem maior luminosidade e menor umidade que o interior florestal, resultando em um gradiente abiótico. Entretanto, o grau de diferença abiótica pode ser afetado a partir do tipo da matriz, influenciando a seleção de espécies. Comparamos a composição florística e a estrutura fitossociológica das comunidades de
Braz. J. Biol.. Publicado em: 04/10/2018
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45. Abiotic effects on the cover and richness of corticolous lichens on Araucaria angustifolia trunks
ABSTRACT Lichens play a key role in natural ecosystems, as they can function as primary producers, recycle minerals and fix nitrogen. Despite their environmental importance, little is known about lichen ecology in Brazil, and especially about how abiotic factors may influence their spatial distribution. In this study, we aimed to verify how the cover and ric
Acta Bot. Bras.. Publicado em: 21/09/2018
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46. Simples não significa pobre: campos e florestas abrigam riqueza similar e composições distintas de espécies de formiga em regiões altas do sul do Brasil
Resumo: Diversos estudos já foram realizados com comunidades de formigas nas regiões de Floresta Ombrófila Densa que ocorrem ao longo da costa do Brasil. Comparativamente menos é conhecido sobre as Florestas Ombrófilas Mistas e campos que ocorrem na parte meridional do domínio da Mata Atlântica. Neste estudo nós realizamos o primeiro levantamento pad
Biota Neotrop.. Publicado em: 23/07/2018
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47. Diameter Increment Modeling in an Araucaria Forest Fragment Using Cluster Analysis
ABSTRACT The aims of the present study were to test the hypothesis that data stratification by cluster analysis and the use of other variables, in addition to DBH, can improve the precision of the estimates in diametric increment modeling for Mixed Ombrophilous Forest species. The study was carried out in the Irati National Forest. Data from 25 permanent sa
Floresta Ambient.. Publicado em: 19/07/2018
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48. Nectar dynamics and reproductive biology of Passiflora actinia Hook. (Passifloraceae) in Araucaria Forest
ABSTRACT Nectar production has an important role in pollinator attraction and successful fruit production in many self-incompatible angiosperm groups. The reproductive biology of Passiflora actinia was studied here and related to nectar dynamics. Passiflora actinia presented a temporal segregation of male and female functions at the beginning of anthesis. Du
Acta Bot. Bras.. Publicado em: 02/07/2018