Pteridophytes
Mostrando 13-20 de 20 artigos, teses e dissertações.
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13. Diversidade beta no interflúvio Purus- Madeira : determinantes da estrutura das comunidades de Marantaceae, Araceae e Pteridófitas ao longo da BR 319, Amazonas, Brasil
Knowledge of the distribution of species along environmental and spatial gradients is very important for the development of wise conservation policies. It is known that environmental heterogeneity is a key factor on the determination of a natural community s structure. Many studies suggest the existence of surrogate groups, i.e. groups that indicate more gen
Publicado em: 2006
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14. Diversidade Beta da Comunidade de Pteridófitas de Florestas de Terra-Firme da Amazônia Central
Planejar a conservação na Amazônia é um grande desafio. A heterogeneidade de hábitats é grande mesmo em escalas pequenas. Para planejar a conservação, é necessário entender como a variação nas comunidades biológicas está relacionada com a variação ambiental e geográfica. Neste estudo, usando pteridófitas (samambaias e plantas afins) com mod
Publicado em: 2006
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15. FlorÃstica e associaÃÃes de espÃcies de pteridÃfitas ocorrentes em remanescentes da Floresta AtlÃntica Nordestina, Brasil
The pteridophytes are considered to be a cosmopolitan group that exhibits a series of adaptations for different substrates types, life forms and habitats, influenced principally by climate and relief. Taking into consideration these ecological adaptations of the group, two areas were selected for vegetation surveys (âÃgua Azulâ forest fragment in the Usin
Publicado em: 2004
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16. FlorÃstica, aspectos ecolÃgicos e conservaÃÃo das pteridÃfitas ocorrentes no parque ecolÃgico JoÃo Vasconcelos Sobrinho (Caruaru-Pernambuco-Brasil)
In the Parque EcolÃgico JoÃo Vasconcelos Sobrinho the floristic survey of pteridophytes occurring in the site was conducted considering ecological aspects and studying the microhabitats and constancy index of species collected between the years of 2001 and 2002, relating these knowledge to the preservation of pteridophytes in the area. the Parque EcolÃgic
Publicado em: 2003
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17. FlorÃstica, aspectos ecolÃgicos e distribuiÃÃo altitudinal das pteridÃfitas em remanescente de floresta atlÃntica no estado de Pernambuco, Brasil
Os fragmentos de Floresta AtlÃntica presentes no nordeste do brasil, ainda apresentam uma flora rica e diversificada, abrangendo muitos grupos taxonÃmicos. Com o objetivo de ampliar o conhecimento florÃstico e ecolÃgico para o grupo das pteridÃfitas, foi selecionado um remanescente florestal situado na Zona da Mata Sul, no estado de Pernambuco, entre os
Publicado em: 2003
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18. Flora pteridofitica das matas ciliares da bacia do Rio Jacare-Pepira,Estado de São Paulo, Brasil
A floristic survey of the pteridophytes from three areas of Gallery Forest of the Jacaré-Pepira River Basin, located in São Paulo State, Brazil, was carried out as a contribution to the knowledge of the floristic composition of the foregoing forest formation as well as of the pteridophyte flora of State of São Paulo. In the 3 areas considered, 91 species
Publicado em: 1993
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19. Comparison of Crenarchaeal Consortia Inhabiting the Rhizosphere of Diverse Terrestrial Plants with Those in Bulk Soil in Native Environments
To explore whether the crenarchaeal consortium found in the rhizosphere is distinct from the assemblage of crenarchaeotes inhabiting bulk soil, PCR-single-stranded-conformation polymorphism (PCR-SSCP) profiles were generated for 76 plant samples collected from native environments. Divergent terrestrial plant groups including bryophytes (mosses), lycopods (cl
American Society for Microbiology.
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20. Occurrence of the Primary Cell Wall Polysaccharide Rhamnogalacturonan II in Pteridophytes, Lycophytes, and Bryophytes. Implications for the Evolution of Vascular Plants1
Borate ester cross-linking of the cell wall pectic polysaccharide rhamnogalacturonan II (RG-II) is required for the growth and development of angiosperms and gymnosperms. Here, we report that the amounts of borate cross-linked RG-II present in the sporophyte primary walls of members of the most primitive extant vascular plant groups (Lycopsida, Filicopsida,
The American Society for Plant Biologists.