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The Amotape-Huancabamba Zone, straddling the Huancabamba Depression in the tropical Andes, is often recognized as a major hotspot of species richness for plants and animals in the Neotropics. The biogeographic role of the area as a barrier, transition, or unique endemism zone in the Andes has long been debated. Here, using tree ferns, we take a new look at this question and discuss the biogeographic significance and limits of the Amotape-Huancabamba Zone. We find that tree fern distribution supports the idea that the Amotape-Huancabamba zone is a unique biogeographic unit within the Andes defined by high endemism, overlap of the floras of the Northern and Central Andes, and high overall species richness; however, the centrally located Huancabamba-Marañón depression plays only a minor role as a floristic barrier. [ABSTRACT FROM AUTHOR]

Copyright of Cuadernos de Vivienda y Urbanismo is the property of Pontificia Universidad Javeriana and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Salud Uninorte is the property of Fundacion Universidad del Norte and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Apuntes: Revista de Ciencias Sociales is the property of Universidad del Pacifico and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The objective of this article is to estimate the impact of the Pension 65 social program on per capita expenditures on food. The study is based on a quantitative methodological perspective, using the differences-in-differences technique with propensity score matching (DD-PSM). For this purpose, the database of the 2017-2018 National Household Survey (ENAHO) is used, both for the treatment and the control group. The unit of analysis are Peruvian households at the national level that participated in the program for two consecutive years, with 2017 as the baseline. The results obtained indicate that per capita expenditure on food has increased by 15.02% for those households that receive the Pensión 65 program. [ABSTRACT FROM AUTHOR]

On the basis of recent fieldwork, six new species of Cyathea from northern Peru are described: Cyathea carolinae, C. cisandina, C. grata, C. oscarorum, C. phoenix, and C. novoi. All were found on sandstone subtrates under different precipitation regimes. Here, we illustrate these species, discuss their natural history, compare them to their putative close relatives, and discuss the implications of their discovery for the floristics of South American tree ferns. [ABSTRACT FROM AUTHOR]