Evidence of Holocene compression at Tuluá, along the western foothills of the Central Cordillera of Colombia

2011 ◽  
Author(s):  
Myriam C. López C. ◽  
Franck A. Audemard M.
Keyword(s):  
Central Cordillera

Biodiversity in the Andean Mountains: Two new rain frogs of the genus Pristimantis (Anura: Craugastoridae) from the northern Cordillera Central in Colombia

Zootaxa ◽  
2021 ◽  
Vol 5040 (3) ◽  
pp. 334-364
Author(s):  
MAURICIO RIVERA-CORREA ◽  
GUSTAVO A. GONZÁLEZ-DURÁN ◽  
ANA M. SALDARRIAGA-GÓMEZ ◽  
SEBASTIÁN DUARTE-MARÍN
Keyword(s):  
New Species ◽  
Species Delimitation ◽  
Intraspecific Diversity ◽  
Conservation Strategies ◽  
Phylogenetic Position ◽  
The Andes ◽  
Two New Species ◽  
Diversity Studies ◽  
First Time ◽  
Central Cordillera

Frequent biodiversity sampling and monitoring programs often lead to relevant taxonomic findings. Here, as a product of different field expeditions to two places in the northern Andes, we discover and describe two new species of rain frogs of the genus Pristimantis from the cloud forests of the Central Cordillera of Colombia. Pristimantis chocolatebari sp. nov. is diagnosed by having the following character states: dentigerous process of vomer triangular, snout large and protruding, dorsum smooth, vocal slits and vocal sac present, groin and hidden part of the thighs yellow. Pristimantis carylae sp. nov. is diagnosed by having iris copper red, dentigerous process of vomer oval, snout short and rounded, dorsum finely shagreen with scattered tubercles, double nuptial pad in males, groin and hidden part of thighs pink. We also infer, for the first time, the phylogenetic position of P. permixtus, P. platychilus, and two candidate new species. In addition, we emphasize not to use genetic distance as the only source of evidence for species delimitation, considering the high intraspecific diversity found in one of the species described here. Finally, we highlight the relevance of different habitat and ecosystem conservation strategies to promote amphibian diversity studies in the Andes.  

Stress behavior from fault data sets within a transtensional zone, South Central Cordillera, Luzon, Philippines: Implications for mineral occurrences

Island Arc ◽  
2009 ◽  
Vol 18 (1) ◽  
pp. 144-154 ◽  
Author(s):  
Mario A. Aurelio ◽  
Jocelyn B. Galapon ◽  
Violet T. Hizon ◽  
Dominic B. Sadsad
Keyword(s):  
Data Sets ◽  
South Central ◽  
Stress Behavior ◽  
Central Cordillera

scholarly journals Description of six new species of Xenorhina Peters, 1863 from southern Papua New Guinea (Amphibia, Anura, Microhylidae)

2021 ◽  
Vol 97 (2) ◽  
pp. 355-382
Author(s):  
Rainer Günther ◽  
Stephen Richards
Keyword(s):  
New Species ◽  
Papua New Guinea ◽  
Tropical Rainforest ◽  
Habitat Preferences ◽  
New Guinea ◽  
Advertisement Calls ◽  
High Rainfall ◽  
Central Cordillera

We describe six new species of the microhylid frog genus Xenorhina from the southern slopes of Papua New Guinea’s central cordillera and adjacent lowlands, based on a combination of morphological (including osteology) and bioacoustic features. All of the new species are fossorial or terrestrial inhabitants of tropical rainforest habitats and belong to a group of Xenorhina having a single, enlarged odontoid spike on each vomeropalatine bone. Advertisement calls and habitat preferences are described for each species, one of which is amongst the smallest hitherto members of the genus. Description of these six species brings the total number of Xenorhina known to 40 and emphasises the importance of the high-rainfall belt that extends along the southern flanks of New Guinea’s central cordillera as a hotspot of Melanesian amphibian diversity.

scholarly journals La pedoantracología en España: una revisión bibliográfica

Pirineos ◽  
2020 ◽  
Vol 175 ◽  
pp. 059
Author(s):  
Rubén Pardo Martínez
Keyword(s):  
Cordillera Bética ◽  
Central Cordillera ◽  
Sobre Todo

La pedoantracología se define como la búsqueda, tratamiento y análisis taxonómico de carbón procedente de vegetación leñosa incendiada en suelos no arqueológicos. Sus aplicaciones han permitido cubrir un amplio espectro de temáticas, sobre todo cuando ha formado parte de aproximaciones paleoecológicas multidisciplinares. En líneas generales, esta metodología ha manifestado un interés creciente dentro de las disciplinas paleoecológicas, aunque actualmente existen enormes diferencias territoriales, de manera que Francia –territorio pionero en la aplicación de esta metodología–produce buena parte de las publicaciones pedoantracológicas europeas. En España, su aplicación en Pirineos, Sistema Central, Cordillera Bética y Cordillera Cantábrica ha sido relativamente reciente, no conociéndose en consecuencia ni su trayectoria ni su estado actual. Por ello, en este trabajo se presenta un análisis detallado y comparativo de todas aquellas investigaciones de carácter pedoantracológico llevadas a cabo en este último país, lo que ha permitido conocer cuáles han sido las conclusiones más relevantes obtenidas por los diferentes grupos de trabajo. Este análisis ha puesto de manifiesto que se trata de una metodología que ha obtenido resultados de gran interés a la hora de resolver debates fitosociológicos clásicos, reconstruir antiguas áreas de distribución de especies o determinar cambios en el límite superior del bosque, resultados que han contribuido y pueden seguir contribuyendo al desarrollo de una gestión forestal sostenible más eficaz. Por su parte, el futuro de la disciplina muestra un progresivo avance hacia otros sistemas montañosos, constatando que se trata de una metodología que ha sabido ganarse su lugar dentro de las disciplinas paleoecológicas.

Species boundaries in the Rana arfaki group (Anura: Ranidae) and phylogenetic relationships to other New Guinean Rana

Zootaxa ◽  
2010 ◽  
Vol 2496 (1) ◽  
pp. 49 ◽  
Author(s):  
STEPHEN C. DONNELLAN ◽  
KEN P. APLIN ◽  
TERRY BERTOZZI
Keyword(s):  
Genetic Differentiation ◽  
Genetic Relationships ◽  
Molecular Genetic ◽  
Geographic Area ◽  
The North ◽  
Morphological Differences ◽  
Digital Disc ◽  
High Level ◽  
North And South ◽  
Central Cordillera

Allozyme electrophoresis is used to explore molecular genetic relationships within the Rana arfaki group and between this group and selected lineages of New Guinean Rana. Rana jimiensis is confirmed as a species distinct from R. arfaki and its range in Papua New Guinea is extended to the Southern Highlands Province and the north-coastal ranges in Sandaun Province. Rana arfaki and R. jimiensis show a high level of genetic differentiation maintained across a wide geographic area and show consistent morphological differences in head shape, tympanum size, degree of digital disc dilation and extent of sexual dimorphism. The two species occur syntopically on the Papuan Plateau, Southern Highlands Province, and are regionally sympatric in Sandaun Province. The observed level of genetic differentiation is equivalent to that reported previously between regionally sympatric members of the Rana papua group. Populations of R. jimiensis from north and south of the central cordillera show no obvious morphological and only minor genetic differentiation. In contrast, R. arfaki shows considerable geographic variation in both morphology and allozymes and may include two or more regionally distinctive forms.

Engineering on the precipice: the performance of mountain road rehabilitation in the Central Cordillera of the Philippines

2019 ◽  
Vol 53 (4) ◽  
pp. 542-568 ◽  
Author(s):  
G. J. Hearn ◽  
J. R. Hart
Keyword(s):  
Rural Communities ◽  
Management Practices ◽  
Slope Failure ◽  
The Philippines ◽  
Google Earth ◽  
Transport Infrastructure ◽  
The Road ◽  
Conflicting Objectives ◽  
Reconstruction Period ◽  
Central Cordillera

Parts of the Central Cordillera of Luzon are among the most challenging locations on Earth in which to build and maintain transport infrastructure, a situation perhaps most epitomized by the Halsema Highway. Since its original construction in the 1920s, the highway has undergone phased improvement and has become a socio-economic lifeline to the rural communities it serves. Unfortunately, in 1990, continuing road improvement works had to be abandoned owing to the outcome of a 7.8 Ms earthquake and the effects of subsequent typhoon damage. Earthquake reinstatement works were designed in 1998 and constructed between 2001 and 2006. The engineering geological challenge this posed was compounded by the effects of severe typhoon rains during the reconstruction period, requiring continual assessment of changing slope and drainage conditions. Since construction, the road has been affected by several new typhoons including, most notably, Typhoons Pepeng and Ompong in 2009 and 2018 respectively. Field inspections in 2010 and 2018, combined with the interpretation of satellite imagery available in Google Earth, have allowed the performance of the works implemented between 2001 and 2006 to be assessed and the outcome has been largely favourable. Very little of the recorded damage has occurred in the locations of earthquake reinstatement. Instead, several new areas of slope failure and subsequent blockage and damage to the road have developed. Many of these areas can be explained with respect to their underlying engineering geology and geomorphology. However, there are just as many that owe their origin to the pattern of rainfall and runoff arising during the passage of individual and successive typhoons, modified significantly by drainage management practices in the road corridor, where engineering serviceability and land use practices sometimes have conflicting objectives.

Systematics of New Guinea treefrogs (Litoria: Pelodryadidae) with erectile rostral spikes: an extended description of Litoria pronimia and a new species from the Foja Mountains

Zootaxa ◽  
2019 ◽  
Vol 4604 (2) ◽  
pp. 335
Author(s):  
PAUL M. OLIVER ◽  
RAINER GÜNTHER ◽  
MUMPUNI MUMPUNI ◽  
STEPHEN J. RICHARDS
Keyword(s):  
New Species ◽  
Sexual Dimorphism ◽  
Mate Selection ◽  
Body Shape ◽  
Size Structure ◽  
New Guinea ◽  
Small Species ◽  
Central Cordillera ◽  
A New Species

A small number of treefrog species (Litoria) from Melanesia are unusual amongst Anura in having distinctive fleshy rostral spikes. Here, we first present an extended description for Litoria pronimia Menzies, a small species that is widespread along the southern edge of the Central Cordillera of New Guinea, and in which males have a long and erectile rostral spike. Second, we describe Litoria pinocchio sp. nov. a new, morphologically similar, yet geographically disjunct species from the Foja Mountains in northern Papua Province, Indonesia. The new species differs from Litoria pronimia in aspects of body shape, proportions and colouration. A review of variation in the size, structure and degree of sexual dimorphism of the rostral spike across different species of Litoria suggests varying function including mate selection and camouflage. 

scholarly journals Provenance and diagenesis from two stratigraphic sections of the lower cretaceous Caballos formation in the upper Magdalena valley: Geological and reservoir quality implications

2018 ◽  
Vol 8 (1) ◽  
pp. 5-29 ◽  
Author(s):  
Edison Duarte
Keyword(s):  
Detrital Zircons ◽  
Source Areas ◽  
Rock Fragments ◽  
Lower Member ◽  
Eastern Segment ◽  
Porosity And Permeability ◽  
Jurassic Rocks ◽  
Late Diagenesis ◽  
Central Cordillera ◽  
High Quartz

The Aptian-Albian Caballos Formation is a proven reservoir in the oil producing basins of the Upper Magdalena Valley and Putumayo (Colombia), characterized by wide variation in its petrophysical properties. Integrated provenance, diagenetic and basic petrophysical analyses are presented from two stratigraphic sections of the Caballos Formation in the Upper Magdalena Valley (Ocal and Cobre creeks) in order to test regional geological models, and to relate compositional and diagenetic factors with the reservoir quality.Sandstones from the Caballos Formation document a change from texturally immature- subarkoses, litharenites to quartz arenites. High quartz contents, the presence of feldspar, sedimentary, metamorphic and volcanic lithic suggest mixed provenance, with a major contribution from sedimentary sources. U-Pb dating of detrital zircons reveals age populations that include contributions from Precambrian, Permian, Triassic and Jurassic rocks. These data, together with the compositional trends, suggest that source areas likely include adjacent  massifs from the eastern segment of the Upper Magdalena Valley with similar compositional andtemporal characteristics (Garzón and Macarena Massifs for the southeastern Ocal Section, and the Upper Magdalena Valley massifs and the eastern flank of the Central Cordillera; Ocal Section). The changes in compositional features and detrital geochronology between the upper and lower members of both sections suggest a change in source areas, associated with the erosion and depletion of adjacent uplifts, and the increasing dominance of more distal eastern and western sources, which reflect the end of tectonic instability and the deepening of the basin.The presence of quartz, feldspar, and lithic rock fragments have a major impact on the porosity and permeability of Caballos Formation sandstones. Porosity values are lower in the lower member of the Caballos Formation where diagenesis has altered abundant feldspar and lithic rock fragments to authigenic porefilling clays. Higher porosity and permeability values found in the upper member of the Caballos correspond to a combination of higher quartz contents and the dissolution of meta-stable components during late diagenesis.

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