Results 111 to 120 of about 72,023 (300)

Is Technological Heterogeneity the Key to Sustainable Coffee Production Efficiency?: A Latent Class Frontier Analysis in the Traditional Coffee Region of Colombia

Journal of Agricultural Economics, EarlyView.
ABSTRACT Coffee producers deal with uncertainty due to high volatility in coffee prices. To navigate these challenges, producers must balance the tradeoff between higher yield and better quality utilising heterogeneous technologies, such as intensive production methods and environmental management practices.
Orlando Rodríguez, Maria Vrachioli, Johannes Sauer   +2 more
wiley   +1 more source

Minería y factores socio-ambientales que debilitan a las comunidades campesinas en los Andes centrales del Perú

Gestión y Ambiente, 2018
El potencial minero y la consecuente inversión minera en los Andes centrales del Perú y su superposición con tierras comunales han generado consecuencias que van desde el impacto en el medio ambiente hasta significativos cambios en la comunidad campesina
Melissa R. Quispe-Zuniga, Carlos M. Quispe-Ortiz, Rommel Plasencia   +2 more
doaj   +1 more source

Conservation threats and future prospects for the freshwater fishes of Ecuador: A hotspot of Neotropical fish diversity. [PDF]

J Fish Biol, 2021
Aguirre WE, Alvarez-Mieles G, Anaguano-Yancha F, Burgos Morán R, Cucalón RV, Escobar-Camacho D, Jácome-Negrete I, Jiménez Prado P, Laaz E, Miranda-Troya K, Navarrete-Amaya R, Nugra Salazar F, Revelo W, Rivadeneira JF, Valdiviezo Rivera J, Zárate Hugo E.   +15 more
europepmc   +1 more source

Propuesta de un protocolo de evaluación de la calidad ecológica de ríos andinos (CERA) y su aplicación a dos cuencas de Ecuador y Perú [PDF]

, 2012
Proposal for an evaluation protocol of the ecological quality of Andean rivers (CERA) and its use in two basins in Ecuador and Peru A Rapid Protocol is presented for Evaluation of the Ecological Status of Andean Rivers (CERA) localized over 2000 m.a.s.l.
Acosta Rivas, Carlos Raúl, Prat i Fornells, Narcís, Rieradevall i Sant, Maria, Ríos Touma, Blanca Patricia   +3 more
core  

Body Size Regulates Niche Overlap Asymmetry in the Subtropical Andes Rain Shadow: Isotopic Paleoecology of Oligocene South American Ungulates

Integrative Zoology, EarlyView.
This study provides the first isotopic analysis of Oligocene mammals from Quebrada Fiera, Mendoza, Argentina, filling a major gap in South American paleontology. It reveals a latitudinal gradient in aridity due to the Andean rain shadow and highlights the role of (semi)permanent water bodies in sustaining diverse herbivore communities. Additionally, it
Dánae Sanz‐Pérez, Santiago Hernández Del Pino, Esperanza Cerdeño, Manuel Hernández Fernández, Laura Domingo   +4 more
wiley   +1 more source

Estratigrafía y estructura de los Andes Centrales Argentinos entre los 30º y 31º de Latitud Sur [PDF]

, 1997
In a cross-section through the Argentine central Andes, two large groups of rocks can be distinguished: a Gondwanic (F'aleozoic) basement, and an Andean cover.
Cegarra, M. I., Espina, R. G., Heredia, N., Rodríguez Fernández, L. R.   +3 more
core   +1 more source

Introducing TropiCam‐AI: A taxonomically flexible automated classifier of Neotropical arboreal mammals and birds from camera‐trap data

Methods in Ecology and Evolution, EarlyView.
Abstract Rapid, accurate assessment of arboreal vertebrates in tropical forests remains a bottleneck for large‐scale biodiversity monitoring, due to the challenges and effort associated with traditional survey methods. To bridge this gap, arboreal camera‐trapping is emerging as a promising way to observe otherwise elusive species, opening new avenues ...
Andrea Zampetti, Luca Santini, Iago Ferreiro‐Arias, Laura Paltrinieri, Iván Ortiz, Brayan A. Cedeño‐Panchez, Christophe Baltzinger, Christopher Beirne, Mark T. Bowler, Pierre‐Michel Forget, Eric Guilbert, Yvonne J. M. Kemp, Carlos A. Peres, Andressa B. Scabin, Andrew Whitworth, Ana Benítez‐López   +15 more
wiley   +1 more source

Geoquímica y sistemática isotópica de rocas metamórficas del Paleozoico inferior. Noroeste de Argentina y Norte de Chile (21°-27° S) [PDF]

, 1999
Más del 95% de los afloramientos del basamento metamórfico del Paleozoico inferior en el Noroeste de A rgentina y Norte de Chile están compuestos por rocas félsicas.
Becchio, R., Franz, G., Kasemann, S., Lucassen, F., Viramonte, J. G.   +4 more
core   +1 more source

Predators of the two paropsine leaf beetles Paropsisterna cloelia and Paropsis charybdis in eucalypt plantations in Marlborough, New Zealand Prädatoren der zwei Blattkäfer Paropsisterna cloelia and Paropsis charybdis in Eukalyptusplantagen in Marlborough, Neuseeland

Agricultural and Forest Entomology, EarlyView.
Coccinellidae (Coleoptera), Miridae (Hemiptera), Hemerobiidae (Neuroptera), Pentatomidae (Hemiptera), Anystidae (Acari), Erythraeidae (Acari) and spiders (Araneidae, Oxyopidae and Salticidae) fed on the invasive paropsine leaf beetles in Marlborough, New Zealand.
Carolin Weser, Manpreet K. Dhami, Elena Moltchanova, Ana Podolyan, Toni M. Withers, Stephen M. Pawson   +5 more
wiley   +1 more source

El Segmento de Subducción Subhorizontal de los Andes Centrales Argentinos-Chilenos [PDF]

, 1997
The westem active margin of South America, characterized by the Andes mountain chain, shows a high variability along strike. Different segments have a diverse topography, cmstal roots and surface geology. Among these segments the flat-slab segment of the
Ramos, V. A.
core   +1 more source