Peces del medio Amazonas: región de Leticia

Bertaco, Vinicius de Araújo

doi:10.1590/s1679-62252006000400011

Cited by 3 publications

(1 citation statement)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Although some libraries are being developed, they host material, in this case, fish, from limited biodiversity regions (Collins et al, 2021). In comparison to the Neotropics, for example, in the middle Amazon Basin, near Leticia (Colombia), in just 40 km 2 , Galvis et al (2006) registered 344 fish species.…”

Section: Methodsmentioning

confidence: 99%

Relevance of DNA barcodes for biomonitoring of freshwater animals

Elías‐Gutiérrez

Valdéz-Moreno²

2023

Front. Environ. Sci.

View full text Add to dashboard Cite

The COI gene, colloquially named the DNA barcode, is a universal marker for species identification in the animal kingdom. Nevertheless, due to the taxonomic impediment, there are various proposals for molecular operational taxonomic units (MOTUs) because high-throughput sequencers can generate millions of sequences in one run. In the case of freshwater systems, it is possible to analyze whole communities through their DNA using only water or sediment as a sample. Using DNA barcodes with these technologies is known as metabarcoding. More than 90% of studies based on eDNA work with MOTUs without previous knowledge of the biodiversity in the habitat. Despite this problem, it has been proposed as the future for biomonitoring. All these studies are biased toward the Global North and focused on freshwater macrofaunae. Few studies include other regions of the world or other communities, such as zooplankton and phytoplankton. The future of biomonitoring should be based on a standardized gene, for example, COI, the most studied gene in animals, or another secondary consensual gene. Here, we analyzed some proposals with 28S or 12S. The studies on eDNA can focus on analyses of the whole community or a particular species. The latter can be an endangered or exotic species. Any eDNA study focused on a community study should have a well-documented DNA baseline linked to vouchered specimens. Otherwise, it will be tough to discriminate between false positives and negatives. Biomonitoring routines based on eDNA can detect a change in a community due to any perturbation of the aquatic ecosystem. Also, it can track changes along the history of an epicontinental environment through the analyses of sediments. However, their implementation will be complex in most megadiverse Neotropical countries due to the lack of these baselines. It has been demonstrated that a rapid functional construction of a DNA baseline is possible, although the curation of the species can take more time. However, there is a lack of governmental interest in this kind of research and subsequent biomonitoring.

show abstract

Section: Methodsmentioning

confidence: 99%

Relevance of DNA barcodes for biomonitoring of freshwater animals

Elías‐Gutiérrez

Valdéz-Moreno²

2023

Front. Environ. Sci.

View full text Add to dashboard Cite

show abstract

Evolución del paisaje amazónico desde el Precámbrico

Prates

2011

RBG

View full text Add to dashboard Cite

Revista Brasileira de GeociênciasArquivo digital disponível on-line no site www.sbgeo.org.br 654 41(4): 654-661, dezembro de 2011 Evolución del paisaje amazónico desde el Precámbrico Luís Enrique Gainette Prates 1Resumen Este ensayo es un estudio acerca de la evolución del paisaje amazónico desde el Precámbrico hasta el presente. Resulta de un intenso levantamiento bibliográfi co de la literatura publicada en libros y ensayos científi cos nacionales e internacionales. Presenta las evidencias geológicas y climáticas de los cambios en la Amazonia, así como sus principales implicaciones sobre la biodiversidad actual; destacando el punto de vista de los diversos autores sobre las hipótesis acerca del Paleo-amazonas y la formación de la actual cuenca amazónica. El trabajo expone que los procesos geológicos y climáticos fueron determinantes para los distintos y múltiples cambios del paisaje a través del tiempo que afectaron la topografía, el suelo, las formaciones vegetales, y la fauna de Suramérica y de la Amazonia. Hubo un gran impacto de estos eventos en la formación de los reductos forestales y no-forestales que contribuyeron con la especiación y divergencia de especies que están presentes en los diferentes hábitats de la Amazonia actual. Hoy, el desagüé del Amazonas, en el Atlántico, aporta intensa sedimentación que es transportada por las mareas, formando los extensos manglares del norte de Brasil. Sin embargo, los efectos de todos estos eventos aún no están totalmente ubicados, dimensionados y comprendidos por las ciencias naturales.Palabras clave: Río Amazonas, Cuenca Marginal, Portal de Guayaquil, Golfo de Maracaibo. Abstract Evolution of the Amazon landscape from the Precambrian.This rehearsal is a study about the evolution of the Amazonian landscape from the Precambrian until the present. It is the result of an intense bibliographical research in books and national and international scientifi c rehearsals. It presents the geological and climatic evidences of the changes in the Amazonian, and their main implications concerning the current biodiversity; it detaches the several authors' point of view on the hypothesis of the Paleo-Amazon and the formation of his current basin. The work exposes that the geological and climatic processes went decisive for the different and multiple changes of the landscape through the time that they affected the topography, the soil, the vegetation, and the fauna of South America and of the Amazonian. There was a great impact of these events in the formation of the forest and no-forest strongholds that they contributed with the speciation and divergence of present species now in the different habitats of the Amazonian. Today, the waters of the river Amazon contribute intense sedimentation that it is transported by the tide, forming the extensive swamps of the north of Brazil. However, the effects of all these events are not still totally measured and understood for the natural sciences.

show abstract

Brazilian Journal of Development

Bonfim¹

View full text Add to dashboard Cite

Peces del medio Amazonas: región de Leticia

Cited by 3 publications

References 0 publications

Relevance of DNA barcodes for biomonitoring of freshwater animals

Relevance of DNA barcodes for biomonitoring of freshwater animals

Evolución del paisaje amazónico desde el Precámbrico

Brazilian Journal of Development

Contact Info

Product

Resources

About