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Por: Jhonattan Vanegas-Guerrero | Fecha: 2016

The Bolivar Whorltail Iguana, Stenocercus bolivarensis, is only known in museum collections from six specimens collected in 1982 at its type locality “around Bolivar municipality in the department of Cauca, Colombia”. After three decades of no records in other localities, herein we report a new record of the Bolivar Whorltail Iguana from Quindío department (Armenia municipality), also representing a significant distribution extension of 285 km North from previous records and represents a latitudinal extension of 2.5°. The newly introduced record of S. bolivarensis apparently belongs to an established population. Finally, we discuss the conservation implications of this rediscovery.

Fuente: Instituto de Investigación de Recursos Biológicos Alexander von Humboldt Formatos de contenido: Artículos

Temas:
Otros

Por: Fabio E. Forero-Ulloa | Fecha: 2016

The Corine Land Cover methodology, is a french methodology adapted by the Agustin Codazzi Geography Institute (Igac) and the Hidrology, Meteorology and Enviromental Studies (Ideam) for Colombia and it is the assessment of land cover using Landsat satelilite images. In this research, the space-temporary assessment of the watershed coverage of the Mecha creek in the Chicamocha river basin was done using Landsat 8 images, between 2014 and 2015, wich were orthorectified, combined using Erdas Software. These were also cut according to the spectral signatures of the selected bands in the ArcGis 10.0 program, and adjusted with images of Google Earth Pro and configured with the use of the National legend coverages at 1:100.000 proposed by Ideam. It was also observed that the moor vegetation is highly fragmented, with a tendency to completely disappear, because of increasing agricultural areasand mining operations; significantly deteriorating the wáter capacity of the creek that supplies the aqueduct of the Municipality of Oicatá. It is concluded that this methodology becomes a hifhly reliable tool for determining spatio-temporal coverage changes in order to be the basis for the decisión-making related coverage in order to protection and conservation.

Fuente: Instituto de Investigación de Recursos Biológicos Alexander von Humboldt Formatos de contenido: Artículos

Temas:
Otros

Por: Sergio Córdoba-Córdoba | Fecha: 2016

El páramo es un ecosistema únicamente presente en los Andes tropicales y contiene diferentes tipos de vegetación y sistemas acuáticos. Es utilizado por varias especies de aves, sin embargo, considerar únicamente a las restringidas excluye una gran cantidad de especies. Se realizó un análisis ecológico que incluyó a todas aquellas que lo utilizan, de acuerdo a sus dietas y discontinuidades de peso. Para el análisis se recopilaron las aves registradas en páramos de Colombia y se propone una clasificación en cuatro categorías de presencia. En los páramos de Colombia han sido registradas 207 especies (49 exclusivas, 69 habituales, 65 periféricas y 24 no permanentes). Predominan Thraupidos, Trochilidos, Tyrannidos y Furnariidos. Muchas especies se registran en la cordillera Oriental y menos en la serranía de Perijá y Sierra Nevada de Santa Marta. Hay 22 especies endémicas y 26 casi endémicas de Colombia. Predominan las aves pequeñas, consumidoras de insectos e invertebrados pequeños; cerca de la mitad consumen otro tipo de alimentos (néctar y frutos, y menor proporción semillas, vertebrados y carroña). Las especies más pesadas consumen vertebrados y carroña y recursos acuáticos. Es necesario evaluar algunas especies para conocer su permanencia en los páramos, al igual que sus abundancias y uso de recursos.

Fuente: Instituto de Investigación de Recursos Biológicos Alexander von Humboldt Formatos de contenido: Artículos

Temas:
Otros

Por: Patricia Chacón de Ulloa | Fecha: 2017

This article describes the database of the ant fauna associated with orange crops on the Caribbean coast of Colombia. The study was carried in the departments of Bolivar, Cordoba, Cesar and Magdalena, in crops of 38 farms in 13 municipalities. In all cultivations, the ants were collected by transects of 50m each with five sampling stations separated by 10 m, at each one three sets of sampling techniques were applied: direct capture (manual), pitfall traps and Winkler sacks. A total of 3119 samples were obtained, distributed into eight subfamilies, 44 genera and 122 species. As expected Myrmicinae subfamily was the one that presented the highest richness (65 species) and capture rate (63,45%). The two most frequent were Ectatomma ruidum and Crematogaster abstinens appearance with a percentage of 13,34% and 8,62% respectively. The database reflects a great diversity in orange crops with a large presence of groups considered important as biological controls including hunting ants and cryptic myrmicines.

Fuente: Instituto de Investigación de Recursos Biológicos Alexander von Humboldt Formatos de contenido: Artículos

Temas:
Otros

Por: Lina M. Mesa S. | Fecha: 2017

Colombia is a geographically diverse country mainly due to the Andean terrain, which creates a river system that combines different orders of drainages, physiography and water types, located in four areas: Caribbean, Pacific, Orinoco and Amazon. Hydrographic areas or basins are classified based on the watershed and have been treated regionally only in terms of political division to manage watersheds sections. A regional classification of freshwater ecosystems that combines both geographical and biological criteria, does not exist for Colombia, so the territorial planning and decision-makers do not consider aquatic ecosystems as a unit in their management guidelines. Therefore, the objective of this research was to propose continental hydro-biological units based on hydro-geographic and biological criteria, regrouping official hydrographic areas according to their fish species composition and the interpretation of their drainage network and geomorphological characteristics. There are 28 ecoregions proposed: six for the Caribbean region, eight for the Andean, five for the Pacific and nine for cis-Andean (five for Orinoco and four for Amazonas). These ecoregions can be used as a tool of territorial planning.

Fuente: Instituto de Investigación de Recursos Biológicos Alexander von Humboldt Formatos de contenido: Artículos

Temas:
Otros

Por: Lorena Cruz-Bernate | Fecha: 2016

In a study conducted between the months of July and December of 2012, two patches of tropical dry forest from the geographic valley of the Cauca river (Colindres-Jamundi and Las Chatas-Buga) were followed. To collect the data, point counts and transects were used; additionally mist nets were used for the recognition of small and inconspicuous birds. 2364 birds, corresponding to 1462 records, divided into 76 species, 27 families and 16 orders were observed. The family with the greatest number of species was Tyrannidae (14), followed by Thraupidae (seven), then Ardeidae (five) and Picidae (five). In the Chatas Forest 51 species, grouped among 20 families were found, while in the Colindres Forest 59 species, grouped among 25 families were found. The data presented, contributes to the knowledge regarding the actual diversity of the bird population that still exists in two of the few patches of tropical dry forest remaining in the geographic valley of the Cauca river, and its relationship with the size and type of matrix surrounding these patches. These data could be taken into account for the design of management and conservation strategies of the dry forest, to mitigate the damage done by the monoculture of sugarcane and human intervention in general, responsible for its high vulnerability.

Fuente: Instituto de Investigación de Recursos Biológicos Alexander von Humboldt Formatos de contenido: Artículos

Temas:
Aves
Otros

Por: Humberto Mendoza-Cifuentes | Fecha: 2017

Miconia curvitheca (Melastomataceae) is described and the name is validated. This species is restricted to high Andean forests and subparamos and is distributed in the southern and central part of the Central Colombian Cordillera of the Andes between 2900 and 3700 m elevation from the department of Cauca to the limits of the departments of Quindío, Tolima and Valle del Cauca. It is characterized by the curved shape of its anthers and differs from the most similar species, M. cuatrecasae, by the following combination of characters: smaller leaves, always bisexual flowers and ovary always four-celled.

Fuente: Instituto de Investigación de Recursos Biológicos Alexander von Humboldt Formatos de contenido: Artículos

Temas:
Otros

Por: Estrella Urtubey | Fecha: 2016

As result of recent explorations in the Andean Cordillera Oriental of Colombia, Tragopogon porrifolius L. (Asteraceae: Cichorieae) is reported for the first time for this country. This study provides ecological information, geographic distribution, photographs, and comments about the particular morphological characteristics of the new reported species.

Fuente: Instituto de Investigación de Recursos Biológicos Alexander von Humboldt Formatos de contenido: Artículos

Temas:
Otros

Por: Nathalie van Vliet | Fecha: 2017

Relative fecundity in fishes is the estimated number of oocytes of a female during spawning. This aspect was investigated in Grundulus quitoensis topotypic specimens from the “El Voladero”, a high Andean lake in Ecuador. Gonad maturation stages (mature and immature) were identified by means of direct observation, subsequently, the relative fertility (FRP) as function of the weight and the total length (TL) were calculated. Average TL of females was 63.9 mm. The numbers of oocytes ranged from 75 to 716 per female, in total 5691 oocytes were counted from 16 females. TW ranged from 0.5 to 4.7 g, whereas TL ranged from 36.7 to 63.9 mm. Relative fecundity ranged from 1.6 to 14.3 oocytes per mm TL (= 6.9 ± 3.6 mm-1) and from 47.2 to 319.1 oocytes per g of TW (= 148.9 ± 74.9 g-1). It is important to know the life cycle and natural history of a species, since they contribute to the ecological knowledge of the fishes that inhabit the high Andean lakes, as is the case of this study of G. quitoensis.

Fuente: Instituto de Investigación de Recursos Biológicos Alexander von Humboldt Formatos de contenido: Artículos

Temas:
Otros

Por: Jesús Ballesteros-Correa | Fecha: 2016

A taxonomic list of the mammals recorded from the department of Córdoba is presented with data from reference collections of national and foreign museums. We include research results from research groups at the Unicórdoba Biodiversity research center (University of Cordoba) and the Functional Ecology Laboratory (UNESIS- Pontificia Universidad Javeriana). Databases of 13 museums in North America (MaNIS) were reviewed. Besides the records found in the Smithsonian National Museum of Natural History (NMNH), Royal Ontario Museum (ROM), Texas Cooperative Wildlife Collection (TCWC) and USA Field Museum of Natural History (FMHN). Mammals of Córdoba department are represented by 40 families, 90 genera and 117 species. The greatest species richness of mammals was found in the subregions of upper Sinú and San Jorge. The greatest number of species are of the order Chiroptera (48.9 %), followed by Carnivora (12 %), Rodentia (10.3 %) and Cetacea (9.4 %).

Fuente: Instituto de Investigación de Recursos Biológicos Alexander von Humboldt Formatos de contenido: Artículos

Temas:
Otros