Results 11 to 20 of about 304,367 (272)

LA COMUNIDAD ANDINA: UN PARADIGMA DE INTEGRACIÓN ECONÓMICA [PDF]

open access: yes, 2014
El presente trabajo tiene por objetivo reseñar los antecedentes, el estado actual y las perspectivas de futuro de la Comunidad Andina (CAN). Este bloque regional nació en 1969 con el nombre de Grupo Andino o Pacto Andino. Fue reformulado en 1997 dando origen a la CAN, compuesta actualmente por Bolivia, Ecuador, Colombia y Perú como países miembros ...
Aguirre Ochoa, Jeanine
openaire   +4 more sources

Envejecimiento y migracion en una comunidad andina: Livitaca en 1689 [PDF]

open access: yesRevista de Historia Económica / Journal of Iberian and Latin American Economic History, 1987
Recientes estudios sobre la población indígena en América han puesto de relieve la abrupta disminución demográfica ocurrida en los dos siglos que sucedieron a la conquista española. Una mayor mortalidad y una menor fecundidad alteraron también la estructura de la población, aumentando en particular su envejecimiento.
López Beltrán, Clara
openaire   +6 more sources

Sensitivity of tropical montane birds to anthropogenic disturbance and management strategies for their conservation in agricultural landscapes

open access: yesConservation Biology, Volume 37, Issue 6, December 2023., 2023
Abstract Tropical montane bird communities are hypothesized to be highly sensitive to anthropogenic disturbance because species are adapted to a narrow range of environmental conditions and display high rates of endemism. We assessed avian sensitivity at regional and continental scales for a global epicenter of montane bird biodiversity, the tropical ...
Ian J. Ausprey   +2 more
wiley   +1 more source

Ecological convergence in phytochemistry and flower–insect visitor interactions along an Andean elevation gradient

open access: yesEcology and Evolution, Volume 13, Issue 8, August 2023., 2023
In this study, we detected patterns of ecological convergence along elevation in floral volatiles as well as cost–benefit ratio in seed versus pollinated seeds. Our results suggest that these evolutionary patterns are the result of biotic and abiotic pressures.
Alma Nalleli Carvajal Acosta   +7 more
wiley   +1 more source

Neutral‐based processes overrule niche‐based processes in shaping tropical montane orchid communities across spatial scales

open access: yesJournal of Ecology, Volume 111, Issue 8, Page 1614-1628, August 2023., 2023
High compositional turnover, even across habitats with the highest degree of human intervention, suggests that both forest‐dwelling and open‐habitat species do not easily disperse across habitats. Species dispersal is the major force of orchid community turnover and might be strongly dependent upon macroevolutionary processes and species life‐history ...
Edicson Parra‐Sanchez   +2 more
wiley   +1 more source

Facilitating biodiversity conservation through partnerships to achieve transformative outcomes

open access: yesConservation Biology, Volume 37, Issue 3, June 2023., 2023
Abstract Conservation biology is a mission‐driven discipline that must navigate a new relationship between conservation and science. Because conservation is a social and political as well as an ecological project, conservation biologists must practice interdisciplinarity and collaboration.
Rehema M. White   +9 more
wiley   +1 more source

Pest risk assessment of Elasmopalpus lignosellus for the European Union

open access: yesEFSA Journal, Volume 21, Issue 5, May 2023., 2023
Abstract Following a request from the European Commission, the EFSA Panel on Plant Health performed a quantitative pest risk assessment of Elasmopalpus lignosellus (Lepidoptera: Pyralidae), the lesser cornstalk borer, for the EU. The assessment considered entry, establishment, spread and impact.
EFSA Panel on Plant Health (PLH)   +27 more
wiley   +1 more source

Temporal stability in species richness but reordering in species abundances within avian assemblages of a tropical Andes conservation hot spot

open access: yesBiotropica, Volume 53, Issue 6, Page 1673-1684, November 2021., 2021
We evaluated the temporal variation in species richness and community composition of local bird assemblages over 11 years in Cajas National Park and Mazán Reserve in the Southern Andes of Ecuador. Species richness remained stabled over time, but we observed taxonomic reordering in the undisturbed native forest, in which the evenness in the distribution
Boris A. Tinoco   +4 more
wiley   +1 more source

La crisis de la Comunidad Andina

open access: yesRevista de Derecho Uninorte, 2022
A pesar de que la Comunidad Andina se ha constituido en el proceso de integración más antiguo de Suramérica; reiteradamente se ha manifestado la crisis del mismo. En este sentido, mediante estas páginas se desarrollan las principales causales por las cuales el proceso andino de integración no produce los efectos deseados. Para efectos de lo anterior se
openaire   +3 more sources

Determinantes de la desigualdad en la Comunidad Andina: evidencia desde un panel VAR bayesiano

open access: yesLecturas de Economía, 2023
Este artículo analiza los determinantes de la desigualdad de ingresos en los países de la Comunidad Andina considerando los efectos de la inversión extranjera directa, el capital humano, el desempleo y la producción por medio de un modelo panel VAR ...
Nicole Cáceres, Dante Urbina
semanticscholar   +1 more source

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