Eulychnia ritteri is endemic to Peru, restricted to the northern coast of the department of Arequipa. The lack of knowledge of this species, and threats such as human activities and climate change, put the populations at risk. In this research, we examined the geographical distribution and conservation status of E. ritteri in the coastal area of the Caravelí province. In addition, the population structure and phenology in the Quebrada Vizcachani population were evaluated using plots of 10x100 m. Data on the accompanying flora and local fauna were also obtained. Eulychnia ritteri showed five populations distributed from 15°43’ to 15°47’S, with a total area of 63.62 ha (0.63 km2). The Quebrada Vizcachani population is the largest (24.5 ha) and the Cementerio population the smallest (0.018 ha). The population density evaluated is 0.06 ind/m2, where seedlings, juveniles, adults, and d...

High Andean wetlands are important ecosystems due to their ecosystem services. Carbon storage is a result of the low decomposition rate due to flooded soils and low temperatures. The carbon content stored in the high Andean wetland of Chalhuanca (Arequipa) was estimated and the value of this service was calculated. For this purpose, 30 samples were taken at random, establishing three carbon pools: aboveground biomass (leaves and stems), belowground biomass (roots) and organic soil. The samples were obtained with an auger-type device; each sample was dried at 65°C for at least 24 hours and the carbon content was determined using the Walkey-Black method and calculations and statistical tests were performed. The total carbon stored in relation to the area of the wetland was approximately 795,415.65 tons of CO2. The fraction of carbon per sample is higher in aerial biomass (49%), followed b...

High Andean wetlands are important ecosystems due to their ecosystem services. Carbon storage is a result of the low decomposition rate due to flooded soils and low temperatures. The carbon content stored in the high Andean wetland of Chalhuanca (Arequipa) was estimated and the value of this service was calculated. For this purpose, 30 samples were taken at random, establishing three carbon pools: aboveground biomass (leaves and stems), belowground biomass (roots) and organic soil. The samples were obtained with an auger-type device; each sample was dried at 65°C for at least 24 hours and the carbon content was determined using the Walkey-Black method and calculations and statistical tests were performed. The total carbon stored in relation to the area of the wetland was approximately 795,415.65 tons of CO2. The fraction of carbon per sample is higher in aerial biomass (49%), followed b...

El cambio climático es un tema que ha tomado preponderancia en los últimos años, y es que las variaciones climáticas las cuales son asociadas a las actividades antropogénicas, están trayendo perjuicios a ecosistemas naturales y a la biodiversidad. Esta investigación tiene como objetivo caracterizar la dinámica de los humedales altoandinos frente al cambio climático, mediante el uso de imágenes satelitales e información climática entre los años 1985-2018, en los distritos de Yanque y San Antonio de Chuca, para lo cual, se han procesado escenas LandSat, correspondientes a la época seca de los años 1985 hasta 2018, con el fin de evaluar la variación de cobertura y salud (Índice de vegetación de diferencia normalizada-NDVI) de los humedales altoandinos. Se obtuvo y analizó estadísticamente la data climática de cinco estaciones adyacentes a la zona de estudio comprendiend...

Se presenta la taxonomía y distribución altitudinal y geográfica de Cumulopuntia F. Ritter en el departamento Arequipa. Se visitaron todas las provincias del departamento tomando en cuenta las localidades indicadas en bibliografía especializada, así como, en colecciones mostradas en la base de datos de herbarios HUSA, HEID, HSP, K, F, ZSS, B, U y US. Para la conservación y herborización de las muestras se usó un método específico para suculentas. La clave dicotómica se elaboró utilizados caracteres excluyentes de cada especie y la descripción de cada taxón se realizó en su ficha correspondiente. La distribución altitudinal se estableció con datos de campo, información de herbarios (HUSA, HEID, HSP, K, F, ZSS, B, U y US) y bibliografía especializada; para la distribución geográfica se obtuvieron coordenadas geográficas en campo, base de datos de herbarios (HUSA, HEID...

High Andean wetlands are important ecosystems due to their ecosystem services. Carbon storage is a result of the low decomposition rate due to flooded soils and low temperatures. The carbon content stored in the high Andean wetland of Chalhuanca (Arequipa) was estimated and the value of this service was calculated. For this purpose, 30 samples were taken at random, establishing three carbon pools: aboveground biomass (leaves and stems), belowground biomass (roots) and organic soil. The samples were obtained with an auger-type device; each sample was dried at 65°C for at least 24 hours and the carbon content was determined using the Walkey-Black method and calculations and statistical tests were performed. The total carbon stored in relation to the area of the wetland was approximately 795,415.65 tons of CO2. The fraction of carbon per sample is higher in aerial biomass (49%), followed b...