Ordination
Mostrando 13-24 de 158 artigos, teses e dissertações.
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13. Composición florística y estructura horizontal del bosque semideciduo micrófilo de la reserva ecológica Siboney-Juticí, Cuba
Abstract The floristic composition and the horizontal structure of the semideciduous microphyll forest of the ecological reserve Siboney-Juticí, a protected area of the biosphere reserve Baconao in the southeastern Cuba, were characterized. The data corresponding to ten 20 × 50 m plots were processed, where to each individual the diameter to 1,30 m of the
Rodriguésia. Publicado em: 2017-06
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14. Maritime Co-operation among South Atlantic Countries and Repercussions for the Regional Community of Security Practice
Abstract This paper aims to examine the importance of co-operation for maritime security in the South Atlantic, focusing on the relationship between the national and sub-regional institutions that have leveraged this process, especially those from Brazil. For this purpose, the diagnosis addresses the debates around the contemporary roles of the navy and the
Contexto int.. Publicado em: 08/05/2017
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15. The role of terrestrial bromeliads in determining the spatial organization of plant life forms in a tropical coastal forest
ABSTRACT The interplay between plant-plant interactions and light heterogeneity in the understory of tropical forests has rarely been examined. We aimed to identify the relative importance of the understory light environment and terrestrial bromeliads in explaining the abundance and spatial organization of different plant life forms along a coastal forest gr
Acta Bot. Bras.. Publicado em: 13/03/2017
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16. Epiphytic ferns in swamp forest remnants of the coastal plain of southern Brazil: latitudinal effects on the plant community
ABSTRACT Community structure and spatial distribution of epiphytic ferns in swamp forest remnants along the coastal plain of the state of Rio Grande do Sul were analyzed. A total of 440 trees were sampled in fifty-seven 10 x 10 m plots. Each phorophyte was divided into five ecological zones (strata), where all species of epiphytic ferns were recorded. A tota
Acta Bot. Bras.. Publicado em: 2016-12
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17. Protocol for collecting Mutillidae (Hymenoptera, Aculeata) in ecological studies: species-area effects on Mutillidae communities
ABSTRACT The species-area relationship is one of the most consistent patterns in ecology, and fragmentation is a major cause of habitat loss. Environmental changes in a site can affect the spatial distribution of organisms. Knowledge of Mutillidae ecology is still scarce due to the lack of standardized sampling. Our aim was to: (1) determine the effect of ha
Rev. Bras. entomol.. Publicado em: 2016-12
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18. Intraspecific variation of meroditerpenoids in the brown alga Stypopodium zonale guiding the isolation of new compounds
Abstract Intraspecific variation on meroditerpenoids production by the brown marine alga Stypopodium zonale at four different populations along the Brazilian coast was analyzed using Principal Component Analysis over high-performance liquid chromatography profiles from algae extracts. The ordination of the samples by the similarities of their chromatographic
Rev. bras. farmacogn.. Publicado em: 2015-12
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19. Assessing the performance of macroinvertebrate metrics in the Challhuaco-Ñireco System (Northern Patagonia, Argentina)
ABSTRACT Seven sites were examined in the Challhuaco-Ñireco system, located in the reserve of the Nahuel Huapi National Park, however part of the catchment is urbanized, being San Carlos de Bariloche (150,000 inhabitants) placed in the lower part of the basin. Physico-chemical variables were measured and benthic macroinvertebrates were collected during thre
Iheringia, Sér. Zool.. Publicado em: 2015-09
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20. Tree species composition in areas of Atlantic Forest in southeastern Brazil is consistent with a new system for classifying the vegetation of South America
Rigorous and well-defined criteria for the classification of vegetation constitute a prerequisite for effective biodiversity conservation strategies. In 2009, a new classification system was proposed for vegetation types in extra-Andean tropical and subtropical South America. The new system expanded upon the criteria established in the existing Brazilian Ins
Acta Bot. Bras.. Publicado em: 2014-06
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21. Myrtaceae throughout the Espinhaço Mountain Range of centraleastern Brazil: floristic relationships and geoclimatic controls
Although biological surveys and taxonomic revisions provide key information to ecological and evolutionary studies, there is a clear lack of floristic and phytogeographic studies of the mountainous regions of Brazil, which harbor some of the most threatened plant ecosystems on the planet. Myrtaceae has been reported to be one of the most important families i
Acta Bot. Bras.. Publicado em: 2014-03
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22. Effects of auditory training in individuals with high-frequency hearing loss
OBJECTIVE: To determine the effects of a formal auditory training program on the behavioral, electrophysiological and subjective aspects of auditory function in individuals with bilateral high-frequency hearing loss.
Clinics. Publicado em: 2014
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23. Influence of fire history and soil properties on plant species richness and functional diversity in a neotropical savanna
Differences in plant species richness and composition are associated with soil properties and disturbances such as fire, which can therefore be key determinants of species occurrence in savanna plant communities. We measured species richness, using nine plant functional traits and abundance to calculate three functional diversity indices. We then used model
Acta Bot. Bras.. Publicado em: 2013-09
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24. What is the importance of open habitat in a predominantly closed forest area to the dung beetle (Coleoptera, Scarabaeinae) assemblage?
What is the importance of open habitat in a predominantly closed forest to the dung beetle assemblage? The Atlantic Forest in Brazil is one of the most highly disturbed ecosystems and is mainly represented by fragmented areas. However, in places where human disturbances have ceased, certain areas are showing a natural regeneration pattern. The aim of the pre
Rev. Bras. entomol.. Publicado em: 2013-09