scholarly journals Range extension of the invasive fish Xiphophorus maculatus (Günther, 1866) (Cyprinodontiformes: Poeciliidae) in the upper Magdalena river basin, Colombia

Check List ◽  
2017 ◽  
Vol 13 (3) ◽  
pp. 2149
Author(s):  
Juan G. Albornoz-Garzón ◽  
Francisco A. Villa-Navarro
Keyword(s):  
Tropical Forest ◽  
River Basin ◽  
New Record ◽  
Range Extension ◽  
Invasive Fish ◽  
Dry Tropical Forest ◽  
Xiphophorus Maculatus ◽  
Magdalena River ◽  
Forest Biome

This study reports the expansion of the known distribution of the invasive fish Xiphophorus maculatus (Günther, 1866) into the upper Magdalena river basin. The new record comes from a wetland in the Dry Tropical Forest biome in Tolima and represents the first collection of this species from the upper Magdalena river basin. An updated distribution for Colombia is provided.

A new remarkable short-tailed whip-scorpion species of Piaroa (Arachnida, Schizomida, Hubbardiidae) from the Colombian Caribbean region

Zootaxa ◽  
2018 ◽  
Vol 4500 (1) ◽  
pp. 91
Author(s):  
ALEJANDRO SEGOVIA-PACCINI ◽  
DANIELA AHUMADA-C. ◽  
JAIRO A. MORENO-GONZÁLEZ
Keyword(s):  
New Species ◽  
Natural History ◽  
Tropical Forest ◽  
Botanical Garden ◽  
Caribbean Region ◽  
Distribution Map ◽  
Dry Tropical Forest ◽  
History Of ◽  
Forest Biome

Herein, we describe a new schizomid species from the genus Piaroa Villarreal, Giuponni & Tourinho, 2008, Piaroa turbacoensis sp. nov., based on individuals collected in the Botanical Garden “Guillermo Piñeres”, Turbaco, Bolivar, Colombian Caribbean region. Piaroa turbacoensis is the sixth species of the genus to be found in Colombia, and the tenth to be found with regards to the genus as a whole. This species is the first Colombian species to be recorded in a Dry Tropical Forest biome. Piaroa turbacoensis is easily distinguishable by the presence of spermathecae lateral lobes with massive circular stalk bases, and male pedipalp with ventroectal truncate process over the femur and ventroectal depression over the patella. Here, we provide an updated distribution map of the genus and comments about the natural history of the new species. 

Specialization and Modularity of a Bat Fly Antagonistic Ecological Network in a Dry Tropical Forest in Northern Colombia

2019 ◽  
Vol 20 (2) ◽  
pp. 503 ◽  
Author(s):  
Adrián A. Durán ◽  
Romeo A. Saldaña-Vázquez ◽  
Gustavo Graciolli ◽  
Laura C. Peinado
Keyword(s):  
Tropical Forest ◽  
Ecological Network ◽  
Dry Tropical Forest ◽  
Bat Fly

PALEOCLIMATIC AND PALEOECOLOGICAL RECONSTRUCTION OF A MIDDLE TO LATE EOCENE SOUTH AMERICAN SEASONALLY DRY TROPICAL FOREST

2019 ◽  
Author(s):  
Camila Martínez ◽  
◽  
Carlos Jaramillo ◽  
Jhonatan Martínez Murcia ◽  
Federico Moreno ◽  
...  
Keyword(s):  
Tropical Forest ◽  
Late Eocene ◽  
South American ◽  
Seasonally Dry Tropical Forest ◽  
Dry Tropical Forest ◽  
Seasonally Dry

scholarly journals The Rise of Climate-Driven Sediment Discharge in the Amazonian River Basin

Atmosphere ◽  
2020 ◽  
Vol 11 (2) ◽  
pp. 208 ◽  
Author(s):  
Nazzareno Diodato ◽  
Naziano Filizola ◽  
Pasquale Borrelli ◽  
Panos Panagos ◽  
Gianni Bellocchi
Keyword(s):  
River Basin ◽  
Amazon Basin ◽  
Global Climate ◽  
Climate Extremes ◽  
Temporal Variations ◽  
Sediment Discharge ◽  
Storm Events ◽  
Discharge Data ◽  
Magdalena River ◽  
Sediment Export

The occurrence of hydrological extremes in the Amazon region and the associated sediment loss during rainfall events are key features in the global climate system. Climate extremes alter the sediment and carbon balance but the ecological consequences of such changes are poorly understood in this region. With the aim of examining the interactions between precipitation and landscape-scale controls of sediment export from the Amazon basin, we developed a parsimonious hydro-climatological model on a multi-year series (1997–2014) of sediment discharge data taken at the outlet of Óbidos (Brazil) watershed (the narrowest and swiftest part of the Amazon River). The calibrated model (correlation coefficient equal to 0.84) captured the sediment load variability of an independent dataset from a different watershed (the Magdalena River basin), and performed better than three alternative approaches. Our model captured the interdecadal variability and the long-term patterns of sediment export. In our reconstruction of yearly sediment discharge over 1859–2014, we observed that landscape erosion changes are mostly induced by single storm events, and result from coupled effects of droughts and storms over long time scales. By quantifying temporal variations in the sediment produced by weathering, this analysis enables a new understanding of the linkage between climate forcing and river response, which drives sediment dynamics in the Amazon basin.

Evidence of river flow regulation loss over time in the Magdalena river basin 

2021 ◽  
Author(s):  
Diver E. Marín ◽  
Juan F. Salazar ◽  
José A. Posada-Marín
Keyword(s):  
Climate Change ◽  
Environmental Change ◽  
River Basin ◽  
River Flow ◽  
Southern Oscillation ◽  
Scaling Theory ◽  
Scaling Properties ◽  
Low Flows ◽  
High Flows ◽  
Magdalena River

<p>Some of the main problems in hydrological sciences are related to how and why river flows change as a result of environmental change, and what are the corresponding implications for society. This has been described as the Panta Rhei context, which refers to the challenge of understanding and quantifying hydrological dynamics in a changing environment, i.e. under the influence of non-stationary effects. The river flow regime in a basin is the result of a complex aggregation process that has been studied by the scaling theory, which allows river basins to be classified as regulated or unregulated and to identify a critical threshold between these states. Regulation is defined here as the basin’s capacity to either dampen high flows or to enhance low flows. This capacity depends on how basins store and release water through time, which in turn depends on many processes that are highly dynamic and sensitive to environmental change. Here we focus on the Magdalena river basin in northwestern South America, which is the main basin for water and energy security in Colombia, and at the same time, it has been identified as one of the most vulnerable regions to be affected by climate change. Building upon some of our previous studies, here we use data analysis to study the evolution of regulation in the Magdalena basin for 1992-2015 based on the scaling theory for extreme flows. In contrast to most previous studies, here we focus on the scaling properties of events rather than on long term averages. We discuss possible relations between changes in the scaling properties and environmental factors such as climate variability, climate change, and land use/land cover change, as well as the potential implications for water security in the country. Our results show that, during the last few decades, the Magdalena river basin has maintained its capacity to regulate low flows (i.e. amplification) whereas it has been losing its capacity to regulate high flows (i.e. dampening), which could be associated with the occurrence of the extremes phases of  El Niño Southern Oscillation (ENSO) and anthropogenic effects, mainly deforestation. These results provide foundations for using the scaling laws as empirical tools for understanding temporal changes of hydrological regulation and simultaneously generate useful scientific evidence that allows stakeholders to take decisions related to water management in the Magdalena river basin in the context of environmental change.</p>

scholarly journals Breeding sites of Culicoides pachymerus Lutz in the Magdalena River basin, Colombia

2010 ◽  
Vol 105 (2) ◽  
pp. 216-219 ◽  
Author(s):  
María Cristina Carrasquilla ◽  
Felipe Guhl ◽  
Yaneth Zipa ◽  
Cristina Ferro ◽  
Raúl Hernando Pardo ◽  
...  
Keyword(s):  
River Basin ◽  
Breeding Sites ◽  
Magdalena River
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