Igor Charles Castor Alves
Federal University of Pará
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Featured researches published by Igor Charles Castor Alves.
The Holocene | 2016
Marlon Carlos França; Igor Charles Castor Alves; Marcelo Cl Cohen; Dilce de Fátima Rossetti; Luiz Cr Pessenda; Paulo Cf Giannini; Flávio Lima Lorente; Antonio Alvaro Buso Junior; José Albertino Bendassolli; Kita Macario
This work integrates geomorphological, sedimentological, and palynological data with radiocarbon dating, as well as δ13C, δ15N, and C/N from sedimentary organic matter to provide a model of mangrove dynamics during the evolution of a wave-dominated delta in Southeastern Brazil. Mangrove dynamics are analyzed within the context of millennial and secular climatic and sea-level changes. Tidal flats, positioned at highest limit of the intertidal zone along the edge of a lagoon sheltered by beach ridges, were occupied by wetlands represented by mangrove and herbaceous vegetation during the mid-Holocene high sea level. After considering the relative sea-level fall and relatively higher fluvial sediment discharge, during the last ~6350 years, progradation took place along this shoreline, resulting in extensive beach ridge deposits that overlie transgressive muds. This process led to loss of mangrove area. Similar dynamics were repeated at ~3043 cal. yr BP, although in a relatively more distal (i.e. seaward) position. Between ~1337 and ~900 cal. yr BP, a tidal flat attached to the edge of a lagoon near the modern coastline was colonized by herbaceous vegetation (C4 plants). The next phase, which occurred between ~900 and ~400 or ~100 cal. yr BP, is marked by the transition from herbaceous to mangrove tidal flats with an increased trend of terrestrial organic matter. During the recent centuries, a mangrove vegetation became established, and there was an increased trend of estuarine-derived organic matter. This mangrove phase, recorded during the last century(ies), may be due to a relative sea-level rise. Under this scenario, erosion of beach ridges and expansion of lagoons and mangroves are expected along the littoral of the State of Espírito Santo in Southeastern Brazil.
Mercator | 2015
Sury de Moura Monteiro; Maâmar El-Robrini; Igor Charles Castor Alves
Este artigo mostra a distribuicao dos nutrientes no estuario do rio Paracauari, durante um ciclo hidrologico amazonico (2008), e no final do periodo de La Nina (abril de 2008). Esse estuario e influenciado por clima tropical umido e meso-mares (3 a 4m), semi-diurna. A amostragem foi realizada em 10 estacoes em tres periodos sazonais distintos: chuvoso (marco), intermediario (junho) e menos chuvoso (setembro). Medimos “in situ” os parâmetros fisico-quimicos utilizando uma sonda multiparâmetro; analisamos os nutrientes dissolvidos (nitrato, nitrito, n-amoniacal, fosfato e silicato) por espectofotometria e o material particulado em suspensao por gravimetria. Observamos amplas variacoes sazonais nas concentracoes dos parâmetros estudados. A temperatura da agua (media de 28,58 oC) e bastante homogenea, tipica das aguas tropicais. O pH variou de acido (5,80) a alcalino (7,86) e a salinidade entre 0,06 a 7,56 ambos com valores maximos na foz, devido a maior influencia marinha. As aguas sao mal oxigenadas no periodo chuvoso (2,35 mg.L-1) e bem no menos chuvoso (6,55 mg.L-1). As concentracoes de material particulado em suspensao e de nutrientes foram maximas no periodo chuvoso devido ao aporte natural proveniente das areas adjacentes.
Earth Surface Processes and Landforms | 2018
Samuel Rodrigues Ribeiro; Edson José Louzada Batista; Marcelo Cancela Lisboa Cohen; Marlon Carlos França; Luiz Carlos Ruiz Pessenda; Neuza Araújo Fontes; Igor Charles Castor Alves; José Albertino Bendassolli
been through the copyediting, typesetting, pagination and proofreading process which may lead to differences between this version and the Version of Record. Please cite this article as doi: 10.1002/esp.4342 This article is protected by copyright. All rights reserved. Allogenic and autogenic effects on mangrove dynamics from the Ceará Mirim River, Northeastern Brazil, during the middle and late Holocene
Acta Amazonica | 2012
Igor Charles Castor Alves; Maâmar El-Robrini; Maria de Lourdes Souza Santos; Sury de Moura Monteiro; Leandro Patrick Ferreira Barbosa; José Tasso Felix Guimarães
Catena | 2015
Marlon Carlos França; Igor Charles Castor Alves; Darciléa F. Castro; Marcelo Cancela Lisboa Cohen; Dilce de Fátima Rossetti; Luiz Carlos Ruiz Pessenda; Flávio Lima Lorente; Neuza Araújo Fontes; Antonio Alvaro Buso Junior; Paulo César Fonseca Giannini; Mariah I. Francisquini
Vegetation History and Archaeobotany | 2013
José Tasso Felix Guimarães; Marcelo Cancela Lisboa Cohen; Marlon Carlos França; Igor Charles Castor Alves; Clarisse Beltrão Smith; Luiz Carlos Ruiz Pessenda; Hermann Behling
Catena | 2015
Marcelo Cancela Lisboa Cohen; Igor Charles Castor Alves; Marlon Carlos França; Luiz Carlos Ruiz Pessenda; Dilce de Fátima Rossetti
Revista de Gestão Costeira Integrada - Journal of Integrated Coastal Zone Management | 2010
Maria de Lourdes Souza Santos; André Luis de Lima Saraiva; Ismaily Bastos Delfino; Leny da Conceição Antunes; Rosa Maria Matos Batista; Igor Charles Castor Alves
Scientia Plena | 2015
Mauricio Willians de Lima; Maria de Lourdes Souza Santos; Djair de Jesus Montelo; Danielle Moura Nunes; Igor Charles Castor Alves; Melissa do Socorro Fonseca da Silva
Boletim Técnico Científico do Cepnor / Tropical Journal of Fisheries and Aquatic Sciences | 2013
Maria de Lourdes Souza Santos; Adriana Oliveira Bordalo; José Almir Rodrigues Pereira; Pedro Chira; Igor Charles Castor Alves; Silvana Socorro Veloso Sodré