Bases para o estudo dos ecossistemas da Amazônia brasileira

Ab’Sáber, Aziz Nacib

doi:10.1590/s0103-40142002000200002

Cited by 42 publications

(24 citation statements)

References 13 publications

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“…The fact that tree species diversity in Dense Cerrado was higher than the others demonstrates, in sum, that Dense Cerrado is an intermediate situation of species composition and possibly a temporal stage between Cerradão and Typical Cerrado. This state can reveal evidence of shifts between forest and savanna (forest advances into Cerrado) over the last millennium as previously recorded by Ab'Saber (1977, 2002 and recently investigated by the TROBIT Project (Saez, Lloyd, Marimon Junior et al, unpublished data) in the same area of this study.…”

Section: Discussionsupporting

confidence: 85%

Diversity, floristic composition, and structure of the woody vegetation of the Cerrado in the Cerrado–Amazon transition zone in Mato Grosso, Brazil

et al. 2015

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Section: Discussionsupporting

confidence: 85%

Diversity, floristic composition, and structure of the woody vegetation of the Cerrado in the Cerrado–Amazon transition zone in Mato Grosso, Brazil

et al. 2015

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“…While fewer researchers are based in the northern region, the vast Amazon basin (Ab'Saber, 2002) attracts scientists from other regions, and around the world. This does not mean, however, that these other regions of the country have been surveyed adequately, given the vast size of the country and the complexity of its hydrographic network.…”

Section: Discussionmentioning

confidence: 99%

An estimate of the potential number of mayfly species (Ephemeroptera, Insecta) still to be described in Brazil

Cardoso

Shimano

Nabout

et al. 2015

Revista Brasileira de Entomologia

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G Model No. of Pages 7 Revista Brasileira de Entomologia xxx (2015) xxx-xxx w w w . r b e n t o m o l o g i a . c o m a b s t r a c tThis study reviewed the data on the Brazilian Ephemeroptera, based on the studies published before July, 2013, estimated the number of species still to be described, and identified which regions of the country have been the subject of least research. More than half the species are known from the description of only one developmental stage, with imagoes being described more frequently than nymphs. The Brazilian Northeast is the region with the weakest database. Body size affected description rates, with a strong tendency for the larger species to be described first. The estimated number of unknown Brazilian species was accentuated by the fact that so few species have been described so far. The steep slope of the asymptote and the considerable confidence interval of the estimate reinforce the conclusion that a large number of species are still to be described. This emphasizes the need for investments in the training of specialists in systematics and ecology for all regions of Brazil to correct these deficiencies, given the role of published papers as a primary source of information, and the fundamental importance of taxonomic knowledge for the development of effective measures for the conservation of ephemeropteran and the aquatic ecosystems they depend on.

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“…In this new scenario of environmental change, public health policy measures are insufficient for understanding and addressing the effects of climate change on the adequate control of malaria vectors (WHO, 2014). Figure 1 outlines the relationships among environmental change, anthropogenic activities, and the dynamics of malaria transmission in the Amazon ecosystem, a region where 99.8% of the malaria cases in Brazil occur and where there is an average annual temperature of 26.5°C and relative humidity of 88% (Ab'Saber, 2002;Silva et al, 2013).…”

Section: Amazon Biome and Malariamentioning

confidence: 99%

Adaptative processes, control measures, genetic background, and resilience of malaria vectors and environmental changes in the Amazon region

et al. 2016

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This study relates multiple parameters that are involved in the occurrence and control of malaria in the Amazon. Ebbs and floods, black and white waters, fishponds, and ''repiquete'' (Amazonian waters phenomenon) influence the density of Anopheles darlingi Root, 1926. The adaptive processes, genetic background, and resilience of Anopheles vectors change in response to climate and environmental changes. This study covers the diversity of anophelines, which increases due to anthropic activities. Regarding strategies for vector control, the following measures are important: (1) use mechanical barriers inside houses (screens and impregnated mosquito nets), (2) determine the level of anopheline resistance to insecticides, and (3) determine the effect of the physiological state of females on malaria transmission effectiveness. Bioinsecticides were found to be efficient in the control of immatures, and there was no alteration of the associated fauna. Data on genetic variability and vector populations demonstrated greater polymorphism in intradomicile subpopulations. Furthermore, knowledge on the structural genome and transcriptome of A. darlingi, associated with bio-ecology and evolution, may indicate an adaptive strategy of this species to the Amazon biome. There are anthropic activities and environmental and climatic changes that favor increased vector density, requiring specific control strategies to reduce populations of this species.

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Bases para o estudo dos ecossistemas da Amazônia brasileira

Cited by 42 publications

References 13 publications

Diversity, floristic composition, and structure of the woody vegetation of the Cerrado in the Cerrado–Amazon transition zone in Mato Grosso, Brazil

Diversity, floristic composition, and structure of the woody vegetation of the Cerrado in the Cerrado–Amazon transition zone in Mato Grosso, Brazil

An estimate of the potential number of mayfly species (Ephemeroptera, Insecta) still to be described in Brazil

Adaptative processes, control measures, genetic background, and resilience of malaria vectors and environmental changes in the Amazon region

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