Canonical Correspondence Analysis Cca
Mostrando 13-24 de 39 artigos, teses e dissertações.
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13. Influência de variáveis ambientais e dinâmica de espécies lenhosas regenerantes nas matas ciliares da bacia do Rio Claro, Jataí, GO / Influence of environmental variables and dynamics of woody species in riparian forests regenerating the basin of the Rio Claro, Jatai, GO
(Efeitos do solo na estrutura da comunidade e distribuição de espécies regenerantes nas matas ciliares da Bacia do Rio Claro, Jataí, GO). O estudo foi realizado em dois remanescentes de mata ciliar na Bacia do Rio Claro, sudoeste goiano, e teve o objetivo de verificar as variações da estrutura e distribuição de espécies regenerantes e possíveis cor
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 25/08/2011
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14. A dinâmica do fitoplâncton em uma várzea Amazônica variações sazonal e nictimeral (Várzea do Lago Grande de Curuai Pará, Brasil) / The dynamics of phytoplankton in an Amazon fllodplain - seasonal and nictemeral variations (Lago Grande de Curuai - Pará, Brasil)
The river-floodplain systems are environments submitted a lateral overflow of river channel due the rains and/or underground waters. They are controlled by the type of climate, morphology and local effects. The lowland lakes are also highly productive because of the rich sources of primary carbon. The sediments transport and suspended and dissolved matter ar
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/03/2011
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15. Regeneração natural das clareiras antrópicas da Província Petrolífera de Urucu-Coari, AM / Natural regeneration of the anthropogenic gaps of Urucu Petroleum Province Urucu-Coari/AM
We studied the environmental variables and species composition in natural regeneration in 10 anthropogenic clearings in the Urucu Petroleum Province (Urucu-Coari/AM). We used the methodology typical of phytosociological surveys, analyzed Soil samples and measured the distance between the clearings and the edge of the forest. We used Canonical Correspondence
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 14/03/2011
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16. Environmental heterogeneity: Anuran diversity in homogeneous environments
The northwestern region of São Paulo was extensively deforested during the agricultural expansion in the last century and only small fragments of the original vegetation cover remained. In this study, we investigated how habitat features influence the composition, richness, and diversity of anurans in environments homogenized by agricultural activities. We
Zoologia (Curitiba). Publicado em: 2011-10
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17. CARACTERIZAÇÃO FLORÍSTICA, DIVERSIDADE E CORRELAÇÃO AMBIENTAL NA FLORESTA NACIONAL DE SÃO FRANCISCO DE PAULA, RS / FLORISTIC CHARACTERIZATION, DIVERSITY AND ENVIRONMENTAL CORRELATION IN THE NATIONAL FOREST OF SÃO FRANCISCO DE PAULA, RS
Populations and species are disappearing due to disturbances in the environment caused by human activities. Given the obvious risk of loss of diversity, it is increasingly necessary to take actions concerning preservation, in which safety features are necessary for measuring the variation of diversity in space and time. The aim of this study was to evaluate
Publicado em: 2010
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18. MECANISMOS DE REGENERAÇÃO NATURAL E ESTRUTURA POPULACIONAL DE TRÊS ESPÉCIES ARBÓREAS EM REMANESCENTE DE FLORESTA OMBRÓFILA MISTA, RIO GRANDE DO SUL / NATURAL REGENERATION MECHANISMS AND POPULATION STRUCTURE OF THREE SPECIES IN MIXED RAIN FOREST REMNANT, RIO GRANDE DO SUL
The ecology of regeneration and population dynamics is necessary information to the conservation and management of forest ecosystems. Thus, this study aimed to characterize: a) the mechanisms of natural regeneration in a Mixed Rain Forest remnant and b) the population structure of Araucaria angustifolia (Bertol.) Kuntze, Blepharocalyx salicifolius (Kunth) O.
Publicado em: 2010
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19. Variação geográfica na morfologia de Gymnodactylus amarali (Squamata, Gekkonidae)
Folidosis differences among geographically distinct populations of Gymnodactylus amarali (Squamata, Phyllodactylidae) in the Brazilian Cerrado and their relationships with environmental variables of climate and altitude were investigated. Folidosis data were obtained from 1044 specimens of 44 different locations in herpetological collections, consisting of 2
Publicado em: 2009
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20. Regeneração natural de espécies arbóreas em fragmento florestal da Zona da Mata Mineira / Natural regeneration of tree species in a Mountain Seasonal Semideciduous Forest fragment in the Atlantic Forest domain, southeastern Brazil
Tree species natural regeneration floristic composition was studied in a Mountain Seasonal Semideciduous Forest fragment in the domain of the Atlantic Forest, in southeastern Brazil (2045 S, 4255 W) to subsidize forest management. Ten sites were selected based on aspect, slope and topographic position. Natural regeneration indexes were estimated for each tre
Publicado em: 2009
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21. InfluÃncia de variÃveis ambientais e espaciais na distribuiÃÃo geogrÃfica da famÃlia Cactaceae no leste do Brasil. / Influence of environmental and spatial variables on the Cactaceae family distribution in eastern Brazil.
This paper was realized with aim of investigate the influence of climatic-environmental and spatial variables and six different vegetation formations on the cacti flora in eastern Brazil. Species occurrence and variables were extracted from bibliography and data banks and after were submitted to Canonical Correspondence Analysis (CCA), Detrended Corresponden
Publicado em: 2009
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22. Relação solo-vegetação em mata ciliar do Rio Gualaxo do Norte, município de Mariana, Minas Gerais / Relationship soil-vegetation in riparian forest of River Gualaxo do Norte, municipal district of Mariana, Minas Gerais
The objetctives of this work were to study the floristics and phytossociologic structure of the arboreous vegetation of a section of riparian forest in the River Gualaxo do Norte, to determine the distribution of arboreous species of the riparian could be correlated with soil factors and to indicate species for the reclamation of riparian forests, to verify
Publicado em: 2009
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23. Matas de galeria no Parque Nacional de Sete Cidades (PNSC), Piauí, Brasil: fitossociologia, diversidade, regeneração natural e relação com variáveis ambientais
O presente trabalho foi realizado no Parque Nacional de Sete Cidades (PNSC), localizado na porção nordeste do Piauí, região onde ainda existem lacunas de conhecimento. O Parque, considerado área prioritária para conservação do bioma Cerrado (BRASIL 1999), contém um mosaico de fisionomias e ocorre em área de transição ecológica. Este estudo faz p
Publicado em: 2009
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24. FITOPLÂNCTON DE UM LAGO DE INUNDAÇÃO AMAZÔNICO (LAGO CATALÃO, AMAZONAS BRASIL): ESTRUTURA DA COMUNIDADE, FLUTUAÇÕES ESPACIAIS E TEMPORAIS
This study analyzed the attributes of the phytoplankton community (species richness, diversity, equitability, density, size structure and rate of community compositional change), associated with some physical and chemical characteristics of a floodplain lake from Central Amazon, Brazil, (Lake Catalão) during the low water (2006) and high (2007) periods , th
Publicado em: 2008