Mapeamento de ambientes costeiros tropicais (Golfão Maranhense, Brasil) utilizando imagens de sensores remotos orbitais

Teixeira, Sheila Gatinho; Filho, Pedro Walfir Martins e Souza

doi:10.1590/s0102-261x2009000500006

Cited by 25 publications

(15 citation statements)

References 2 publications

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“…This marked similarity between the basins was further emphasized by the results of the BAPS analysis, with the two groups being included in a single cluster. The genetic proximity between the specimens from these two basins may be a result of their geomorphological similarities, and not least because the Pindaré is the principal tributary of the Mearim (Teixeira and Souza-Filho, 2009;Piorski, 2010).…”

Section: Discussionmentioning

confidence: 99%

“…The Pindaré, Mearim, and Itapecuru form a group of basins typical of the region, with similar topography, and all three discharge into the Gulf of Maranhão, the Mearim/Pindaré into São Marcos Bay, and the Itapecuru in São José Bay. The lower stretches of the Itapecuru and Mearim are characterized by a distinct landscape of meanders and lakes, and the Mearim connects to the Pindaré, which is its principal tributary (Teixeira and Souza-Filho, 2009;Piorski, 2010). The geomorphological evolution of the Gulf of Maranhão reflects the fluctuations in sea level that occurred during the Pliocene and Pleistocene, which culminated in the present-day configuration of estuaries in central Maranhão (Ab'Saber, 1960).…”

Section: Introductionmentioning

confidence: 99%

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Genetic differentiation in the populations of red piranha, Pygocentrus nattereri Kner (1860) (Characiformes: Serrasalminae), from the river basins of northeastern Brazil

et al. 2015

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The red piranha, Pygocentrus nattereri, is an important resource for artisanal and commercial fisheries. The present study determines the genetic differentiation among P. nattereri populations from the northeastern Brazilian state of Maranhão. The DNA was isolated using a standard phenol-chloroform protocol and the Control Region was amplified by PCR. The PCR products were sequenced using the didesoxyterminal method. A sequence of 1039 bps was obtained from the Control Region of 60 specimens, which presented 33 polymorphic sites, 41 haplotypes, һ =0.978 and π =0.009. The neutrality tests (D and Fs) were significant (P < 0.05) for most of the populations analyzed. The AMOVA indicated that most of the molecular variation (72%) arises between groups. The fixation index was highly significant (F ST = 0.707, P < 0.00001). The phylogenetic analyses indicated that the specimens represented a monophyletic group. Genetic distances between populations varied from 0.8% to 1.9%, and were <0.5% within populations. The degree of genetic differentiation found among the stocks of P. nattereri indicates the need for the development of independent management plans for the different river basins in order to preserve the genetic variability of their populations. Keywords

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Genetic differentiation in the populations of red piranha, Pygocentrus nattereri Kner (1860) (Characiformes: Serrasalminae), from the river basins of northeastern Brazil

et al. 2015

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“…The Coastal plateau of Maranhão spreads by a wide coastal fringe and represents a geomorphological domain that can be subdivided into four markedly differentiated sectors, according to Feitosa (2006): the moist west-northwest coast of Maranhenses Recesses, dominated by vast tidal plateaus (mangroves); its most pronounced recess, constituted by the Golfão Maranhense; the east coast, of semi-moist climate, dominated by extensive fields of moving or fixed dunes; generating, in its retro area, wide fluvialmarine plateau of extremely flat topography and practically adjusted to the level of general base, called Baixada Maranhense; and the deltaic plateau of the Parnaíba River (, Teixeira and Souza Filho, 2009;Bandeira 2013). …”

Section: Maranhense Northern Regionmentioning

confidence: 99%

“…Represented by an extensive inland plain is constituted by a seasonally flooded surface of freshwater marshes (or hydrophilic fields floodplain), intermittent lakes, halophiles fields floodplain, salt marshes (or apicuns), mangroves, muddy tidal flats (or crowns mud) and estuarine channel (Teixeira and Souza Filho, 2009), where converge the main rivers genuinely Maranhense: Itapecuru, Munim, Mearim, Grajaú and Pindaré; Typical plains river, characterized by low slope in the middle and lower stretches. It is a "Pantanal Maranhense".…”

Section: Baixada Maranhensementioning

confidence: 99%

Biogeographical Diversity of North Mesoregion of the Maranhão State (Brazil)

Chaves¹,

Silva²,

Amaral³

et al. 2016

J. Geo. Mod.

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Maranhão North Mesoregion has the highest demographic density of the state because where is located the capital, São Luís. The climate is humid or sub-humid tropical with rainfall rates around 1,000 mm / year, and suffering, this way, the mass influence of air. The coastal plain of Maranhão is subdivided into four geomorphological sectors: to the west-northwest coast, which is marked by State recesses, specifically maranhense Golfão; the east coast where dominate the fields of movable or fixed dunes; and the deltaic plain of the Parnaíba River. This study aimed to present a panorama of the North region of Maranhão State demographic density focus, economic sectors, and biological diversity. With regard to the economic sector, the northern region, one of the highlights are the Lençóis maranhenses, the main geo-touristic attractive in relation to its natural beauty and to its mysteries, rivers, mangroves, moving dunes and interdune lagoons, constituting areas of magnificent landscapes, with favorable conditions for recreational tourism. In the extreme north of the state, is found the baixada maranhense that is considered one of the most beautiful state tourist centers, characterized by extensive plains, rivers, estuaries, mangroves and flooded fields, having as highlight, the floating islands of Formoso, Lontra, Cajari and Capivari lakes, in the city of Penalva. In terms of biological diversity, the North Region is dominated by the Amazon forest, which has specific characteristics of the tropical forest. The fauna of the region is typical, with the presence of large and medium-sized animals and many arthropods already reported to the state. The vegetation comprises trees of the Amazon domain, however, is easily found plants of the cerrado biome and babassu palms. In general, the region stands out for its natural beauty and constitute an important economic center. Key words: São Luís Island, Maranhense Amazon, Maranhão State. DIVERSIDADE BIOGEOGRÁFICA DA MESORREGIÃO NORTE DO ESTADO DO MARANHÃO (BRASIL)RESUMO: A Mesorregião do Norte Maranhense possui a maior densidade demográfica do Estado, pois é onde está localizado a capital, São Luís. O clima da região é tropical úmido ou subúmido com índices de precipitação entorno de 1.000 mm/ano, sofrendo assim influência de massas de ar. A Planície Costeira do Maranhão é subdividida em quatro setores geomorfológicos: a costa oeste-noroeste que é marcada por reentrâncias do Estado, especificamente o Golfão maranhense; a costa leste onde predomina os campos de dunas móveis ou fixas; e a planície deltaica do rio Parnaíba. Neste trabalho objetivou apresentar um panorama da região norte do Estado do Maranhão com enfoque densidade demográfica, setores econômicos e diversidade biológica. No que tange ao setor econômico a região norte, um dos destaques é os Lençóis maranhense, principal atrativo geoturístico no que se refere às suas belezas naturais e aos seus mistérios, rios, mangues, dunas móveis e lagoas interdunas, constituindo áreas de paisagens magníficas, com condiçõ...

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“…Oil spill environmental sensitivity maps, adapted to the peculiarities of the Amazonian region (Souza Filho et al, 2004) were drawn at tactical scales through the use of Radarsat and Landsat sensors (Gonçalves et al, 2009;Teixeira & Souza Filho 2009;Boulhosa & Souza Filho, 2009), and operational scale through the use of High Resolution remote sensing (Andrade et al, 2010;Rodrigues & Szlafsztein 2010;Andrade et al, 2009). Over the past decade were reached advances in identification and assessment of sensitivity through spatial maps, the impacts to oil spill analyses, and oil spill risk in Amazonian coastal.…”

Section: Introductionmentioning

confidence: 99%

Remote Sensing and Environmental Sensitivity for Oil Spill in the Amazon, Brazil

Andrade¹,

Szlafsztein²

2012

Remote Sensing - Applications

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Mapeamento de ambientes costeiros tropicais (Golfão Maranhense, Brasil) utilizando imagens de sensores remotos orbitais

Cited by 25 publications

References 2 publications

Genetic differentiation in the populations of red piranha, Pygocentrus nattereri Kner (1860) (Characiformes: Serrasalminae), from the river basins of northeastern Brazil

Genetic differentiation in the populations of red piranha, Pygocentrus nattereri Kner (1860) (Characiformes: Serrasalminae), from the river basins of northeastern Brazil

Biogeographical Diversity of North Mesoregion of the Maranhão State (Brazil)

Remote Sensing and Environmental Sensitivity for Oil Spill in the Amazon, Brazil

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