Results 1 to 10 of about 1,111 (178)

Natural history, population changes, and conservation needs of the Guacharaquita frog Tachiramantis lentiginosus (Anura, Strabomantidae) in the Colombian Andes

Animal Biodiversity and Conservation
Historia natural, cambios demográficos y necesidades de conservación de la rana Guacharaquita Tachiramantis lentiginosus (Anura, Strabomantidae) en los Andes colombianos Tachiramantis es un género propuesto recientemente que incluye siete especies de ...
G. Díaz, D. Arrieta-García, L. J. Ortiz, M. Martínez, O. Armesto, A. A. Acevedo   +5 more
doaj   +1 more source

Elevation shapes alpine snow algal blooms and their influence on albedo reduction

New Phytologist, Volume 251, Issue 5, Page 2482-2496, September 2026.
Graphical summary of elevational trends in Sanguina‐dominated snow algal blooms. Increasing elevation was associated with larger cells, lower Chla content per cell, higher astaxanthin ratios, lower snow water content, and reduced cell‐normalized albedo, whereas algal cell density showed no consistent elevational trend.
Pablo Almela, Scott Hotaling, J. Joseph Giersch, Helena C. L. Klip, James J. Elser, Trinity L. Hamilton   +5 more
wiley   +1 more source

Systematics of Marmosa Subgenus Micoureus With Emphasis in ‘rapposa’ Group (Didelphidae, Marmosini): Geographic Variation and Revalidation of M. budini

Zoologica Scripta, Volume 55, Issue 5, Page 681-692, September 2026.
ABSTRACT Micoureus is the most species‐rich subgenus within the genus Marmosa. Conflicting arrangements regarding the number of species comprising this subgenus have been proposed and the validity of M. budini has been debated. Here, we used an approach integrating genetic and morphological data were conducted to reanalyze the ‘rapposa’ group ...
Maria Clara Santos Ribeiro, Aldo Caccavo, Joyce Rodrigues do Prado, Cibele Rodrigues Bonvicino   +3 more
wiley   +1 more source

Taxonomía y biogeografía de cuatro especies de Psectrascelis (Coleoptera: Tenebrionidae) de la Precordillera y Cordillera de los Andes en Mendoza, Argentina Taxonomy and biogeography of four species of Psectrascelis (Coleoptera: Tenebrionidae) in the high mountains Precordillera and Cordillera de los Andes in Mendoza, Argentina

Revista de la Sociedad Entomológica Argentina, 2005
RESUMEN. El género neotropical Psectrascelis Solier (Pimeliinae: Nycteliini) comprende 75 especies que se distribuyen desde el sur de Perú hasta el sur de Argentina y Chile. En este aporte se revisan las cuatro especies de Psectrascelis que habitan en el
Gustavo E. Flores, Rodrigo S. Gómez
doaj  

SEIS NUEVAS ESPECIES DE ELEUTHERODACTYLUS DUMERIL & BIBRON, 1841 (AMPHIBIA: LEPTODACTYLIDAE) DEL NORTE DE LA CORDILLERA OCCIDENTAL DE COLOMBIA

Revista de la Academia Colombiana de Ciencias Exactas, Físicas y Naturales
Se nominan y describen seis nuevas especies de Eleutherodactylus de los bosques nublados del norte de la Cordillera Occidental de Colombia. Dos de ellas parecen estrechamente relacionadas con especies encontradas en las laderas amazónicas de los Andes ...
Pedro M. Ruíz-Carranza, John D. Lynch, María Cristina Ardila-Robayo   +2 more
doaj   +1 more source

Frozen and Scorched: Genomic Signatures of Adaptive Divergence and Hibernation in the Living Fossil Dromiciops

Ecology and Evolution, Volume 16, Issue 8, August 2026.
We evaluated adaptation to torpor and hibernation in the genus Dromiciops by comparing it with both torpid and non‐torpid marsupials, and investigated divergent selection signals between its two species. For the ancestral node, we identified positive selection in the genes PFKFB2, LAMP3, OTX1, and RAPSN, alongside an enrichment of pathways potentially ...
Elisa Gonzalez‐Ugalde, Paula M. Avendaño, Julián F. Quintero‐Galvis, Eduardo J. Pizarro, Francisco A. Cubillos, Roberto F. Nespolo, Fabiola León, Juliana A. Vianna   +7 more
wiley   +1 more source

Experimental, Genomic, and Structural Evidence Supporting Putative PET‐Hydrolases in Thermophilic Bacteria Isolated From Hot Springs in Cajamarca, Peru

MicrobiologyOpen, Volume 15, Issue 4, August 2026.
Integrated microbiological, genomic, and structural analyses of bacteria isolated from a Peruvian geothermal system reveal enzymatic potential for the transformation of polyesters such as PET. This study links experimental evidence with genomic determinants and in silico analyses that support the thermophilic bacteria biodegradation capacity.
Marco A. Rivera‐Jacinto, Claudia Rodríguez‐Ulloa, Sara R. Briones‐Ramírez, Betsy Quispe‐Cruz, Sandra Carrasco‐Tarrillo, Diego A. Leonardo, Juan P. Cardenas   +6 more
wiley   +1 more source

Water and Gas Exchange Responses of Five Related Blueberry Species (Ericaceae spp.) to the Dry Season in the High‐Andean Forest of the Colombian Eastern Cordillera

Plant-Environment Interactions, Volume 7, Issue 4, August 2026.
ABSTRACT Vaccinium, Cavendishia, and Macleania are typical genera of blueberries from the Ericaceae belt, a narrow ecosystem that connects the high Andean forest and páramo, where fragmentation makes the species more vulnerable to climate change. To answer the question of whether five related blueberry species could physiologically behave similarly in ...
Carolina Ramos‐Montaño, N. Milena Cárdenas‐Avella, Ledis V. Montenegro‐Rubiano, Angélica del Pilar Dallos, Rafael Andrés Rodríguez‐Sabogal   +4 more
wiley   +1 more source

Los Andes y América

ARQ, 2009
Una visión integrada y global de Sudamérica señala la cordillera de los Andes como generadora de una particular morfología territorial. Dividiendo el continente entre las grandes planicies y sus ríos hacia el Atlántico y los valles transversales y ríos ...
Teodoro Fernández
doaj  

Petrogenesis and Tectonic Evolution of Cenozoic Magmatism in the Southernmost Northern Andes: Insights From Zircon Petrochronology

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 8, August 2026.
Abstract This study integrates new zircon U–Pb ages, zircon εHf(t)–δ18O isotopic data, and whole‐rock geochemistry to refine the temporal and spatial framework of magmatism in the southern Northern Andes (SNA) from ∼65 to 6 Ma. The San Lucas, Catamayo, Portachuela, and Gonzanamá batholiths and magmatic suites, along with Late Miocene plutons, display ...
J. Iglesias, C. Witt, L. C. Sandoval Espinel, M. Zattin, M. Poujol, O. Bruguier, O. Poma, M. J. Hernández, O. Averbuch, M. Seyler, D. Bosch, F. Chanier, S. Ventalon, C. Liorzou, V. Bosse   +14 more
wiley   +1 more source