An ecoregional classification for the state of Roraima, Brazil: the importance of landscape in malaria biology
Mem. Inst. Oswaldo Cruz
;
102(3): 349-358, June 2007. mapas, tab
Artigo
em Inglês
| LILACS
| ID: lil-452513
ABSTRACT
Understanding the different background landscapes in which malaria transmission occurs is fundamental to understanding malaria epidemiology and to designing effective local malaria control programs. Geology, geomorphology, vegetation, climate, land use, and anopheline distribution were used as a basis for an ecological classification of the state of Roraima, Brazil, in the northern Amazon Basin, focused on the natural history of malaria and transmission. We used unsupervised maximum likelihood classification, principal components analysis, and weighted overlay with equal contribution analyses to fine-scale thematic maps that resulted in clustered regions. We used ecological niche modeling techniques to develop a fine-scale picture of malaria vector distributions in the state. Eight ecoregions were identified and malaria-related aspects are discussed based on this classification, including 5 types of dense tropical rain forest and 3 types of savannah. Ecoregions formed by dense tropical rain forest were named as montane (ecoregion I), submontane (II), plateau (III), lowland (IV), and alluvial (V). Ecoregions formed by savannah were divided into steppe (VI, campos de Roraima), savannah (VII, cerrado), and wetland (VIII, campinarana). Such ecoregional mappings are important tools in integrated malaria control programs that aim to identify specific characteristics of malaria transmission, classify transmission risk, and define priority areas and appropriate interventions. For some areas, extension of these approaches to still-finer resolutions will provide an improved picture of malaria transmission patterns.
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Índice:
LILACS (Américas)
Assunto principal:
Ecossistema
/
Insetos Vetores
/
Malária
/
Culicidae
Tipo de estudo:
Estudo prognóstico
Limite:
Animais
/
Humanos
País/Região como assunto:
América do Sul
/
Brasil
Idioma:
Inglês
Revista:
Mem. Inst. Oswaldo Cruz
Assunto da revista:
Medicina Tropical
/
Parasitologia
Ano de publicação:
2007
Tipo de documento:
Artigo
País de afiliação:
Brasil
/
França
Instituição/País de afiliação:
Fiocruz/BR
/
Institut de Recherche pour le Développement/FR
/
Secretaria de Estado da Saúde de Roraima/BR
/
Universidade Federal de Pernambuco/BR
/
Universidade Federal de Roraima/BR
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