87 results match your criteria basins colombia

Operationalizing Integrated Water Resource Management in Latin America: Insights from Application of the Freshwater Health Index.

Environ Manage 2021 Mar 10. Epub 2021 Mar 10.

Instituto Tecnológico de Monterrey, Centro del Agua para América Latina y Caribe, Monterrey, Mexico.

Water crises in Latin America are more a consequence of poor management than resource scarcity. Addressing water management issues through better coordination, identification of problems and solutions, and agreement on common objectives to operationalize integrated water resources management (IWRM) could greatly improve water governance in the region. Composite indices have great potential to help overcome capacity and information challenges while supporting better IWRM. Read More

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Phylogeography, genetic diversity and population structure of the freshwater stingray, (Müller & Henle, 1841) (Myliobatiformes: Potamotrygonidae) in the Colombian Amazon and Orinoco basins.

Mitochondrial DNA A DNA Mapp Seq Anal 2021 01 21;32(1):20-33. Epub 2020 Dec 21.

Laboratorio de Ecología Molecular de Vertebrados Acuáticos (LEMVA), Departamento de Ciencias Biológicas, Universidad de los Andes, Bogotá, Colombia.

The freshwater stingray have coloration, osteological and morphometric variations that could suggest the existence of more than one species in Colombia. In order to evaluate the phylogeography, population structure and genetic diversity for distributed in the Amazon and Orinoco basins, we amplified partial region of mitochondrial DNA () in 50 samples from eight different sub-basins. Our results suggest three phylogroups and a vicariance event occurred 43 million years ago proposing how diverged into the basins. Read More

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January 2021

Evolutionary determinism and convergence associated with water-column transitions in marine fishes.

Proc Natl Acad Sci U S A 2020 12 16;117(52):33396-33403. Epub 2020 Dec 16.

Department of Biology, The University of Oklahoma, Norman, OK 73019;

Repeatable, convergent outcomes are prima facie evidence for determinism in evolutionary processes. Among fishes, well-known examples include microevolutionary habitat transitions into the water column, where freshwater populations (e.g. Read More

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December 2020

Population genetics of the freshwater fish (Characiformes: Prochilodontidae), using species-specific microsatellite loci.

PeerJ 2020 11;8:e10327. Epub 2020 Nov 11.

Facultad de Ciencias, Escuela de Biociencias, Laboratorio de Biología Molecular y Celular, Universidad Nacional de Colombia-Sede Medellín, Medellín, Colombia.

is a freshwater fish endemic to the Colombian Magdalena-Cauca and Caribbean hydrographic basins. The genetic structure patterns of populations of different members of and the historic restocking of its depleted natural populations suggest that exhibits genetic stocks that coexist and co-migrate throughout the rivers Magdalena, Cauca, Cesar, Sinú and Atrato. To test this hypothesis and explore the levels of genetic diversity and population demography of 725 samples of . Read More

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November 2020

Can we take the pulse of environmental governance the way we take the pulse of nature? Applying the Freshwater Health Index in Latin America.

Ambio 2021 Apr 15;50(4):870-883. Epub 2020 Nov 15.

Department of Public Administration, Sun-Yat Sen University, No. 1088 Xueyuan Avenue, Nanshan District, Shenzhen, 518055, P.R. China.

Quantitative assessments have long been used to evaluate the condition of the natural environment, providing information for standard setting, adaptive management, and monitoring. Similar approaches have been developed to measure environmental governance, however, the end result (e.g. Read More

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Methyl Paraben and Carbamazepine in Water and Striped Catfish (Pseudoplatystoma magdaleniatum) in the Cauca and Magdalena Rivers.

Bull Environ Contam Toxicol 2020 Dec 21;105(6):819-826. Epub 2020 Oct 21.

GDCON Group, Environmental School, Faculty of Engineering, University Research Headquarters (SIU), University of Antioquia, calle 70 No 52 - 21, 050010, Medellín, Colombia.

Between 2017 and 2019, samplings were carried out in the San Jorge, Cauca and Magdalena River basins in Colombia, to determine the presence of methyl paraben and carbamazepine in water and Pseudoplatystoma magdaleniatum. For the analysis of the samples, a validation of the analytical method was performed, following the EPA method 1694 (Pharmaceutical and personal care products in water), with slight modifications. This was done by liquid-chromatography tandem mass spectrometry, for quantification of methyl paraben and carbamazepine, including parameters of linearity, accuracy precision and veracity. Read More

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December 2020

Characidium chancoense, a new species of South American darter from the Río Cauca drainage, Colombia (Characiformes: Crenuchidae).

Zootaxa 2020 May 1;4768(2):zootaxa.4768.2.6. Epub 2020 May 1.

Grupo de Investigación en Peces Neotropicales, Fundación para la Investigación y el Desarrollo Sostenible FUNINDES, Cali, Colombia. Programa de Informática de la Biodiversidad, Instituto de Ciencias Naturales, Universidad Nacional de Colombia sede Bogotá. Cra. 30 no. 45-03, edificio 425.Bogotá D.C. Colombia..

Characidium chancoense new species, is described from the transandean upper Río Cauca drainage in Colombia. It can be distinguished from all congeners by its pigmentation pattern that consists of 7-12 vertical bars, most of which are cuneate-shaped with the vertex ending on or just below the lateral-line scale series, except for the last 1-4, which are dorsoventrally elongate rectangular bars that extend well below the lateral line. Characidium chancoense is sympatric with C. Read More

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Hidden or unnoticed? Multiple lines of evidence support the recognition of a new species of Pseudocorynopoma (Characidae: Corynopomini).

J Fish Biol 2021 Jan 26;98(1):219-236. Epub 2020 Oct 26.

Department of Zoology, Biodiversity Research Centre, University of British Columbia, Vancouver, British Columbia, Canada.

Species delimitation is a permanent issue in systematics. The increasing recognition of geographically isolated populations as independent lineages allowed by new methods of analysis has inflated the species-populations dilemma, which involves deciding whether to consider separate lineages as different species or structured genetic populations. This is commonly observed between fishes of adjacent river basins, with some lineages being considered allopatric sister species and others considered isolated populations or variants of the same species. Read More

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January 2021

Density and diversity of macroinvertebrates in Colombian Andean streams impacted by mining, agriculture and cattle production.

PeerJ 2020 16;8:e9619. Epub 2020 Sep 16.

Red de Diversidad Biológica del Occidente Mexicano, Instituto de Ecología, INECOL A.C., Centro Regional del Bajío,, Pátzcuaro, Michoacán, México.

Background: Mining, agriculture and cattle production are activities that threaten the quality and quantity of water resources in the Colombian Andes. However, many drainage basins in this region have not been subjected to simultaneous evaluation of the impact these activities have on the density, diversity and composition of aquatic macroinvertebrates (AMI). The first two of these ecological variables are expected to decrease drastically from zones with no apparent impact towards areas with anthropogenic activity, which areas with mining will present the most impoverished AMI community. Read More

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September 2020

Use of computational intelligence techniques to predict flooding in places adjacent to the Magdalena River.

Heliyon 2020 Sep 14;6(9):e04872. Epub 2020 Sep 14.

Universidad Distrital Francisco José de Caldas, Bogotá, Colombia.

Floods are one of the worst natural disasters in the world. Colombia is a country that has been greatly affected by this disaster. For example, in the years 2010 and 2011 there was a heavy rainy season, which caused floods that affected at least two million people and there were economic losses of 6. Read More

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September 2020

Determination of I activity concentration and rate in main inflows and outflows of Salitre wastewater treatment plant (WWTP), Bogota.

J Environ Radioact 2020 Dec 21;225:106425. Epub 2020 Sep 21.

Facultad de Ingeniería, Fundación Universidad de América, Avenida Carrera 1 No.20-53, 111711, Bogotá, Colombia.

Samples were collected for several weeks to determine the evolution of the I (Iodine-131) activity concentration in the inflow water processed at the Salitre wastewater treatment plant (WWTP) in Bogota, Colombia, derived from medical facilities for thyroid cancer diagnosis and treatment. Mass balances on I were performed based on the activity rates at the main inflow and outflow of the plant. The I activity concentration in the raw water stream was observed to increase significantly from Monday onwards throughout the week, while the daily activity concentration was highest in the morning and then continuously decreased over the rest of the day. Read More

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December 2020

Two new species of Bleeker, 1858 (Siluriformes: Pseudopimelodidae) from the Magdalena Basin, Colombia.

PeerJ 2020 3;8:e9723. Epub 2020 Sep 3.

Grupo de Investigación en Peces Neotropicales, Fundación para la Investigación y el Desarrollo Sostenible (FUNINDES), Cali, Colombia.

The family Pseudopimelodidae is widely distributed in South America and includes 51 described species organized in seven genera. Only two of four species of the genus have been recorded for the trans-Andean basins of Colombia, and , whose similarity in external morphology make their identification difficult. We performed a phylogenetic analysis using a fragment of the Cytochrome C Oxidase subunit 1 gene (COI), and analyzed osteological and traditional morphometric characters to study from the Colombian trans-Andean region. Read More

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September 2020

The Amazonian Red Side-Necked Turtle (Spix, 1824) (Testudines, Chelidae) Has a GSD Sex-Determining Mechanism with an Ancient XY Sex Microchromosome System.

Cells 2020 09 12;9(9). Epub 2020 Sep 12.

Institute for Applied Ecology, Faculty of Science and Technology, University of Canberra, Canberra, ACT 12 2616, Australia.

The Amazonian red side-necked turtle is an endemic Amazonian Chelidae species that occurs in small streams throughout Colombia and Brazil river basins. Little is known about various biological aspects of this species, including its sex determination strategies. Among chelids, the greatest karyotype diversity is found in the Neotropical species, with several 2 configurations, including cases of triploidy. Read More

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September 2020

Species delimitation in a range-restricted group of cascudinhos (Loricariidae: Epactionotus) supports morphological and genetic differentiation across coastal rivers of southern Brazil.

J Fish Biol 2020 Dec 5;97(6):1748-1769. Epub 2020 Oct 5.

Laboratory of Vertebrate Systematics, Pontifícia Universidade Católica do Rio Grande do Sul, PUCRS, Porto Alegre, Brazil.

Epactionotus species are known for inhabiting the rocky-bottom stretches of fast-flowing rivers in a limited geographic area along the Atlantic coast of southern Brazil. These species are endemic to single coastal river drainages (two neighbouring drainages for Epactionotus bilineatus) isolated from each other by the coastal lacustrine environments or the Atlantic Ocean. E. Read More

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December 2020

The unknown diversity of the genus Characidium (Characiformes: Crenuchidae) in the Chocó biogeographic region, Colombian Andes: Two new species supported by morphological and molecular data.

J Fish Biol 2020 Dec 27;97(6):1662-1675. Epub 2020 Sep 27.

Grupo de Investigación en Peces Neotrópicales, Fundación para la Investigación y el Desarrollo Sostenible FUNINDES, Cali, Colombia.

Two new species of Characidium, C. tatama and C. dule, are described from the biogeographic Chocó region in western Colombia. Read More

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December 2020

Genetic Diversity of the Cichlid (Steindachner, 1878) as a Conservation Strategy in Different Colombian Basins.

Front Genet 2020 24;11:815. Epub 2020 Jul 24.

Laboratório de Genética e Evolução (LabGEv), Programa de Pós-Graduação em Biologia Evolutiva, Departamento de Biologia Estrutural, Molecular e Genética, Universidade Estadual de Ponta Grossa, Ponta Grossa, Brazil.

Cichlids constitute a diverse monophyletic group that have developed adaptive strategies to thrive in diverse environments. represents an example of diversification on the South American Andean uplift, providing a key model for understanding the evolution of biogeographic patterns. In this study, we analyzed the species using two mitochondrial markers (, ) and one nuclear marker () in a populational level. Read More

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The combined effects of climate change and river fragmentation on the distribution of Andean Amazon fishes.

Glob Chang Biol 2020 Oct 12;26(10):5509-5523. Epub 2020 Aug 12.

UMR Laboratoire Évolution et Diversité Biologique, CNRS 5174, IRD 253, UPS, Toulouse, France.

Upstream range shifts of freshwater fishes have been documented in recent years due to ongoing climate change. River fragmentation by dams, presenting physical barriers, can limit the climatically induced spatial redistribution of fishes. Andean freshwater ecosystems in the Neotropical region are expected to be highly affected by these future disturbances. Read More

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October 2020

A policy-driven framework for conserving the best of Earth's remaining moist tropical forests.

Nat Ecol Evol 2020 10 10;4(10):1377-1384. Epub 2020 Aug 10.

Departamento de Biología, Facultad de Ciencias, Universidad Nacional de Colombia, Bogotá, Colombia.

Tropical forests vary in composition, structure and function such that not all forests have similar ecological value. This variability is caused by natural and anthropogenic disturbance regimes, which influence the ability of forests to support biodiversity, store carbon, mediate water yield and facilitate human well-being. While international environmental agreements mandate protecting and restoring forests, only forest extent is typically considered, while forest quality is ignored. Read More

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October 2020

Modeling seasonal water yield for landscape management: Applications in Peru and Myanmar.

J Environ Manage 2020 Sep 7;270:110792. Epub 2020 Jun 7.

Picker Engineering Program, Smith College, Northampton, MA, 01063, USA. Electronic address:

A common objective of watershed management programs is to secure water supply, especially during the dry season. To develop such programs in contexts of low data and resource availability, program managers need tools to understand the effect of landscape management on the seasonal water balance. However, the performance of simple, parsimonious models is poorly understood. Read More

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September 2020

Ancient genetic divergence in bumblebee catfish of the genus (Pseudopimelodidae: Siluriformes) from northwestern South America.

PeerJ 2020 29;8:e9028. Epub 2020 May 29.

Facultad de Ciencias, Escuela de Biociencias, Laboratorio de Biología Molecular y Celular, Universidad Nacional de Colombia-Sede Medellín, Medellín, Colombia.

is a Neotropical genus of bumblebee catfish, composed of four valid species occurring in both - and -Andean rivers of South America. The orogeny of the Andes has led to diversification in the genus in Colombia. This study analyzed partial sequences of mitochondrial and nuclear genes to test the hypothesis that the species, nominally recognized as and in Colombia, correspond to more than two different evolutionary lineages. Read More

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Genomic analyses reveal two species of the matamata (Testudines: Chelidae: Chelus spp.) and clarify their phylogeography.

Mol Phylogenet Evol 2020 07 9;148:106823. Epub 2020 Apr 9.

Museum of Zoology, Senckenberg Dresden, A. B. Meyer Building, Dresden, Germany.

The matamata is one of the most charismatic turtles on earth, widely distributed in northern South America. Debates have occurred over whether or not there should be two subspecies or species recognized due to its geographic variation in morphology. Even though the matamata is universally known, its natural history, conservation status and biogeography are largely unexplored. Read More

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Hyphessobrycon rheophilus, a new species from rapids of the Amazon and Orinoco river basins (Characiformes: Characidae: Stethaprioninae).

Zootaxa 2019 Dec 23;4712(4):zootaxa.4712.4.5. Epub 2019 Dec 23.

Universidade Federal de Rondônia, Departamento de Engenharia de Pesca, rua da Paz, 4376, Lino Alves Teixeira, 76916-000, Presidente Medici, RO, Brazil..

A new species from rapids of Rio Aripuanã, Rio Madeira basin, in Brazil, and from the same type of habitat in the upper Rio Negro and upper Rio Orinoco basins in Brazil, Colombia, and Venezuela is described and assigned to the genus Hyphessobrycon. The new species presents an interrupted lateral line plus a single perforated scale on caudal peduncle and a small dark blotch on dorsal procurrent caudal-fin rays, features not found in the other species of Hyphessobrycon. Comments on the phylogenetic position of the new species, its rheophilic habits, and the biogeographic implications of its distribution are presented. Read More

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December 2019

Taxonomic review of the Hyphessobrycon panamensis species-group (Characiformes: Characidae).

Zootaxa 2020 Mar 18;4751(3):zootaxa.4751.3.1. Epub 2020 Mar 18.

Programa de Pós-Graduação em Ecologia de Ambientes Aquáticos Continentais, Universidade Estadual de Maringá. Av. Colombo, 5790, 87020-900 Maringá, PR, Brazil..

A taxonomic review of the Hyphessobrycon panamensis species-group is presented, with recognition of six valid species. In Central America, H. panamensis was restricted to the drainages of both Atlantic and Pacific coasts of Panama; H. Read More

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Freshwater fish diversity hotspots for conservation priorities in the Amazon Basin.

Conserv Biol 2020 08 23;34(4):956-965. Epub 2020 Mar 23.

UMR EDB (Laboratoire Évolution et Diversité Biologique), CNRS 5174, IRD253, UPS, 118 route de Narbonne, F-31062, Toulouse, France.

Conserving freshwater habitats and their biodiversity in the Amazon Basin is a growing challenge in the face of rapid anthropogenic changes. We used the most comprehensive fish-occurrence database available (2355 valid species; 21,248 sampling points) and 3 ecological criteria (irreplaceability, representativeness, and vulnerability) to identify biodiversity hotspots based on 6 conservation templates (3 proactive, 1 reactive, 1 representative, and 1 balanced) to provide a set of alternative planning solutions for freshwater fish protection in the Amazon Basin. We identified empirically for each template the 17% of sub-basins that should be conserved and performed a prioritization analysis by identifying current and future (2050) threats (i. Read More

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The impact of anthropogenic litter on Colombia's central Caribbean beaches.

Mar Pollut Bull 2020 Mar 17;152:110909. Epub 2020 Jan 17.

Department of Geology, Grand Valley State University, The Seymour K. & Esther R. Padnos Hall of Science 213A, Allendale, MI, USA.

A total of 7563 anthropogenic litter (AL) items, grouped into twelve different typologies, were collected along 25 beaches located on the central Caribbean coast of Colombia. The average AL abundance was 6.05 items/m, plastic items being the most common reaching a total percentage of 88. Read More

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Local environmental factors influence beta-diversity patterns of tropical fish assemblages more than spatial factors.

Ecology 2020 02 26;101(2):e02940. Epub 2019 Dec 26.

Grupo de Investigación en Zoología, Facultad de Ciencias, Universidad del Tolima, Tolima, Colombia.

A major goal in ecology is to understand mechanisms that influence patterns of biodiversity and community assembly at various spatial and temporal scales. Understanding how community composition is created and maintained also is critical for natural resource management and biological conservation. In this study, we investigated environmental and spatial factors influencing beta diversity of local fish assemblages along the longitudinal gradient of a nearly pristine Neotropical river in the Colombian Llanos. Read More

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February 2020

Systematics and biogeography of the genus Scaria Bolívar, 1887 (Orthoptera: Tetrigidae: Batrachideinae).

Zootaxa 2019 Sep 30;4675(1):zootaxa.4675.1.1. Epub 2019 Sep 30.

Universidad Distrital Francisco José de Caldas. Grupo de Investigación en Artrópodos "Kumangui". Bogotá-Colombia.

The Amazon rainforest is the world's most extensive tropical rainforest, holding a considerable ecological and taxonomic diversity. Speciation in this region arises from multiple factors, such as topography, climate fluctuations, oceanic transgression, vegetation and the delimitation of zones circumscribed by sub-basins within the greater Amazon basin. Different scenarios have been proposed to better understand the diversification of Amazonian taxa, whether by Pleistocene refugia or by areas of endemism. Read More

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September 2019

Mercury in Populations of River Dolphins of the Amazon and Orinoco Basins.

Ecohealth 2019 12 12;16(4):743-758. Epub 2019 Nov 12.

Grupo de Ecología del Paisaje y Modelación de Ecosistemas-ECOLMOD, Departamento de Biología, Facultad de Ciencias, Universidad Nacional de Colombia, Cra 30 No. 45-03, Bogotá, DC, Colombia.

In the Amazon and Orinoco basins, mercury has been released from artisanal and industrial gold mining since the Colonial time, as well as a result of deforestation and burning of primary forest, that release natural deposits of methyl mercury, affecting the local aquatic vertebrate fauna. This study reports the presence of mercury in river dolphins' genera Inia and Sotalia. Mercury concentrations were analysed in muscle tissue samples collected from 46 individuals at the Arauca and Orinoco Rivers (Colombia), the Amazon River (Colombia), a tributary of the Itenez River (Bolivia) and from the Tapajos River (Brazil). Read More

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December 2019

Unexpected fish diversity gradients in the Amazon basin.

Sci Adv 2019 09 11;5(9):eaav8681. Epub 2019 Sep 11.

Instituto Nacional de Pesquisas da Amazônia, Coordenação de Biodiversidade, Avenida André Araújo, 2936, Petrópolis, 69067-375 Manaus, AM, Brazil.

Using the most comprehensive fish occurrence database, we evaluated the importance of ecological and historical drivers in diversity patterns of subdrainage basins across the Amazon system. Linear models reveal the influence of climatic conditions, habitat size and sub-basin isolation on species diversity. Unexpectedly, the species richness model also highlighted a negative upriver-downriver gradient, contrary to predictions of increasing richness at more downriver locations along fluvial gradients. Read More

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September 2019

Phylogenetic relationships and historical biogeography of Oligosarcus (Teleostei: Characidae): Examining riverine landscape evolution in southeastern South America.

Mol Phylogenet Evol 2019 11 27;140:106604. Epub 2019 Aug 27.

Laboratório de Ictiologia, Departamento de Zoologia, Universidade Federal do Rio Grande do Sul - UFRGS, Av. Bento Gonçalves, 9500, Bloco 4, prédio 43.435, 91501-970 Porto Alegre, RS, Brazil; Laboratorio de Ictiología, Unidad de Ecología y Sistemática (UNESIS), Departamento de Biología, Facultad de Ciencias, Pontificia Universidad Javeriana, Carrera 7 N° 43-82, Bogotá D.C., Colombia.

The pike-characin Oligosarcus is a group of Characidae composed of 22 species, which have mostly allopatric distributed species in southeastern South America and sympatric occurrence of few species. Oligosarcus shares a similar distribution pattern with other fish genera and therefore, can help us to understand biogeographic events that influenced freshwater fish distribution in the southeastern South America. Our paper presents the most extensive taxonomic coverage for molecular analysis of Oligosarcus and uses various methods to examine the evolutionary history of the genus. Read More

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November 2019