The role of tectonics and climate in the late Quaternary evolution of a northern Amazonian River

Cremon, Édipo Henrique; Rossetti, Dilce de Fátima; Sawakuchi, André Oliveira; Cohen, Marcelo Cancela Lisboa

doi:10.1016/j.geomorph.2016.07.030

Cited by 50 publications

(44 citation statements)

References 66 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Thus, the origin of island specialist lineages from the Negro River basin predates the formation of the current archipelagos. This corroborates an intense dynamism of insular habitat availability in the lower Negro region, which may have created fleeting insular environments that were occupied by ancestral lineages (Cremon et al., ; Irion et al., ; Rossetti et al., ).…”

Section: Discussionsupporting

confidence: 53%

“…The modern floodplain and islands of the Negro and Amazon rivers result from sediment accumulation during the Holocene (Latrubesse & Franzinelli, , ). However, fluvial terraces with ages ranging from Miocene to Late Pleistocene (Cremon, Rossetti, Sawakuchi, & Cohen, ; Dino, Soares, Antonioli, Riccomini, & Nogueira, ; Nogueira, Silveira, & Guimarães, ; Pupim, Sawakuchi, Mineli, & Nogueira, ; Rossetti, Toledo, & Góes, ; Rossetti et al., ; Soares et al., ) are widespread in lowland Amazonia. These older fluvial terraces were formed by abandonment of older floodplains as a result of channel incision.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Phylogeography and population dynamics of Antbirds (Thamnophilidae) from Amazonian fluvial islands

Choueri

Gubili

Borges

et al. 2017

Journal of Biogeography

View full text Add to dashboard Cite

Aim: To investigate the evolution of the avifauna associated to Amazonian fluvial islands, focusing on the Negro River archipelagos.Locations: Fluvial islands in the Amazon Basin.Methods: One generalist floodplain species (Hypocnemoides melanopogon) and three river island specialists (Myrmotherula assimilis, Myrmoborus lugubris and Thamnophilus nigrocinereus) were studied (Thamnophilidae). We sequenced two mitochondrial genes and genotyped eight microsatellite loci. Phylogenetic relationships among intraspecific lineages and divergence times were estimated using Bayesian Inference.Haplotype networks, AMOVA (analysis of molecular variance) and Mantel tests were used to verify the spatial organization of genetic diversity. Gene flow and population structure were evaluated using a dissimilarity index, Bayesian inference and allele frequencies. Historical demography was inferred through neutrality tests and Extended Bayesian skyline plots (EBSP).Results: River island specialists have evolved distinct lineages in different Amazonian tributaries, but exhibit very weak population structure within the Negro river basin. The generalist floodplain species had no population structure along the Amazon basin or within the Negro river basin. Signals of weak and recent (Pleistocene) population expansion were recovered for all species.Main conclusions: River islands specialists show stronger population structure within Amazonia than floodplain generalists. They show a common spatial and temporal pattern of divergence between populations from the Negro islands and western Amazonia (upper and middle Solimões), which may be related to Amazonian drainage evolution. Island specialists had low genetic diversity within the Negro basin, while the higher and unstructured diversity pattern found in the floodplain generalist species may be a consequence of higher dispersal caused by the seasonal flooding pulse. River islands populations have a recent and dynamic history of contact and isolation, with small historical fluctuations of population sizes, which is in sharp contrast with the patterns found in upland forest birds.

show abstract

Section: Discussionsupporting

confidence: 53%

Section: Discussionmentioning

confidence: 99%

Phylogeography and population dynamics of Antbirds (Thamnophilidae) from Amazonian fluvial islands

Choueri

Gubili

Borges

et al. 2017

Journal of Biogeography

View full text Add to dashboard Cite

show abstract

“…Figura 80: Gráfico com dados de granulação para os topos de barras estudas na época de seca em 2015 e granulação do talvegue dos áreas da Xiborena e Marchantaria na época de cheia de 2016 mostrando que a não existe uma relação linear de granulometria Figura 82: Idades OSL e C14 de sedimentos na planície moderna dos rios amazônicos mostrando que não há ciclo de deposição em escala regional. Rio Solimões Rossetti et al, 2005;Gonçalves Júnior et al, 2016), Rio Negro (Latrubesse and Franzinelli, 2005), Rio Madre de Dios (Rigsby et al, 2009), Rio Madeira (Rossetti et al, 2014) e Rio Branco (Cremon et al, 2016)…”

Section: 105unclassified

“…Iça, não existe um consenso de delimitação dos terraços quaternários, pois a bacia amazônica é muito extensa e cada trabalho investiga uma área específica da bacia (Rossetti et al, 2005(Rossetti et al, , 2014Cremon et al, 2016;Gonçalves Júnior et al, 2016). De maneira geral, essas planícies de inundação foram datadas como mais recente com idade dentro do Holoceno Cremon et al, 2016;Sant'Anna et al, 2017). E ainda mais recente, são as barras de areia dentro dos rios ativos com idades que variam de 0,4 à 3 ka com datações de 14 C em matéria orgânica (Cremon et al, 2016) e 11.5 ka por OSL (SAR) (Sant'Anna et al, 2017).…”

Section: Terraços Quaternáriosunclassified

“…De maneira geral, essas planícies de inundação foram datadas como mais recente com idade dentro do Holoceno Cremon et al, 2016;Sant'Anna et al, 2017). E ainda mais recente, são as barras de areia dentro dos rios ativos com idades que variam de 0,4 à 3 ka com datações de 14 C em matéria orgânica (Cremon et al, 2016) e 11.5 ka por OSL (SAR) (Sant'Anna et al, 2017). As idades das barras de areia dentro do rio decrescem à medida que o rio desce através de medidas OSL feitas em topos de barra (Ferreira, 2013 Gupta, 2008;Latrubesse, , 2015Lewin and Ashworth, 2014), com padrão de canal anabranching ( Latrubesse, , 2015; Ashworth e Lewin, 2012; Lewin e Ashworth, 2014), origem sedimentar predominantemente andina (Guyot et al, 2007;Viers et al, 2008;Mapes, 2009;Horbe et al, 2013;do Nascimento et al, 2015) e uma dinâmica elevada com alta troca de sedimentos da planície aluvial com o canal (Dunne et al, 1998), desta forma existe uma grande complexidade no sistema deposicional sedimentar.…”

Section: Terraços Quaternáriosunclassified

See 1 more Smart Citation

Arquitetura e preservação de barras e depósitos de canais de grandes rios do oeste da Amazônia Brasileira

Tamura¹

View full text Add to dashboard Cite

Primeiramente, gostaria de agradecer ao meu orientador Dr. Renato Paes de Almeida e professora Dra. Liliane Janikian por compartilharem seus conhecimentos e a disponibilidade de tempo. Eles sempre me deram força e acreditaram no meu trabalho, me estimulando cada vez a aprimorar os conhecimentos. Aos meus amigos de laboratório Ariel, Carlos e Cristiano que sempre estiveram ao meu lado discutindo e me dando força para o desenvolvimento do trabalho. Aos alunos e professores que me auxiliaram no campo da Amazônia:

show abstract

The Negro River in the Anavilhanas Archipelago: Streamflow and geomorphology of a complex anabranching system in the Amazon

Marinho

Zanin

Filizola

2022

Earth Surf Processes Landf

View full text Add to dashboard Cite

The evolution of the fluvial landscape is the result of controls and processes that can be observed by the adjustments a river makes to its hydrological regime. The Negro River is the sixth-largest river in the world by water volume and contains two complex anabranching systems, the Anavilhanas and Mariuá archipelagos, and despite its importance, there is a lack of hydrological survey data on its multichannel reaches.The objective of this study was to analyse the fluvial dynamics of the lower Negro River and the morphodynamics of the Anavilhanas Archipelago channels in the Amazon basin. The analysed set of fluviometric surveys and cartographic data indicated that the average water velocity and depth of the channels were the most sensitive variables for water discharge variability. In addition, the reduction in the width/depth ratio of the channels in the Anavilhanas region is associated with an increased number of islands, but not with a fluvial transport capacity increase. These landforms play an important role in modulating flood wave dynamics in the lower reach of the Negro River. Seasonal water storage occurs in the channels and lakes of the archipelago due to the backwater effect caused by the Amazon River, which is the main control in the spatiotemporal variation of water discharge along the Anavilhanas Archipelago.

show abstract

The role of tectonics and climate in the late Quaternary evolution of a northern Amazonian River

Cited by 50 publications

References 66 publications

Phylogeography and population dynamics of Antbirds (Thamnophilidae) from Amazonian fluvial islands

Phylogeography and population dynamics of Antbirds (Thamnophilidae) from Amazonian fluvial islands

Arquitetura e preservação de barras e depósitos de canais de grandes rios do oeste da Amazônia Brasileira

The Negro River in the Anavilhanas Archipelago: Streamflow and geomorphology of a complex anabranching system in the Amazon

Contact Info

Product

Resources

About