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1
artículo
Publicado 2022
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Peter Joseph Hocking Weeks, or Pedro Hocking as he was known in Lima, was born in Pucallpa on July 7, 1938 and died in Lima on October 31, 2022. Pedro Hocking did not have a scientific background, but he was recognized as a naturalist for his contributions to the knowledge and documentation of Peruvian birds. Pedro Hocking was part of a generation passionate for biodiversity, for whom each locality visited was a new world that contained unknown species and that did not have field guides or current technological resources to identify in situ those that were already known. It was a time when the collection of specimens was the basic tool to know the biodiversity of a locality and the main activity of the expeditions. Although his main interest was birds, his contributions were not limited to them but included other groups of fauna as well.
2
artículo
Publicado 2021
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The response of soil microbial activity to climate warming has been predicted to have a large destabilising effect on the carbon cycle. However, the nature of this feedback remains poorly understood, especially in tropical ecosystems and across annual to decadal timescales. We studied the response of bacterial community growth to 2 and 11 years of altered temperature regimes, by translocating soil across an elevation gradient in the tropical Andes. Soil cores were reciprocally translocated among five sites across 3 km in elevation, where mean annual temperature (MAT) ranged from 26.4 to 6.5°C. The bacterial community growth response to temperature was estimated using a temperature Sensitivity Index (SI): the log-ratio of growth determined by leucine incorporation at 35°C: 4°C. Bacterial communities from soil translocated to their original site (controls) had a growth response assumed ...
3
artículo
Publicado 2021
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This work was supported by a CONCYTEC (Peru) -World Bank grant (Contract 011-2019-FONDECYT-BM-INC-INV). In Huayopata we thank the Cuba and Povea families for their hospitality and help during field work.
4
artículo
Publicado 2014
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One of main factors identified as explaining forest loss and degradation in the Selva (the Peruvian Amazon) is the migration of people from the Sierra (Andes highlands), where agricultural conditions are severe, to forest areas in the Selva in search of new land. This paper aims at clarifying the characteristics and process of migration based on interviews with local people near Pucallpa, Ucayali Department, where forest loss and degradation has advanced in recent decades. In the study area, forest loss and degradation progressed by commercial logging after construction of a road connecting between Lima and Pucallpa in 1943. After logging, stock-farming companies and immigrants entered the area, and land uses other than high forest have been expanding. Today, the study area is occupied by people who have immigrated since the 1960s. Many of them earned income by logging until the 1980s, w...
5
artículo
Publicado 2005
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The taxonomy of the Ribes andicola group and Urtica is investigated for the relict forests in the AmotapeHuancabamba Zone and especially the relict forests of NW Peru. Three new species of Ribes are described, Ribes contumazensis as local endemic from Contumazá, R. colandina as widespread across the Andes from Lambayeque and La Libertad to Amazonas and R. sanchezii as endemic to forests overlooking the Marañon. Additionally, Ecuadoren R. austroecuadorense is recorded for the first time from Peru from forest relics in Huancabamba (Piura) and Chota (Cajamarca). Two new species of Urtica are described, U. urentivelutina as a local endemic on the slopes overlooking the Marañon near Chagual (La Libertad), and U. lalibertadensis which is widespread in La Libertad from Otuzco to Tayabamba. Urtica longispica is reported as new to the flora of Peru and U. macbridei is reported from northern Pe...
6
artículo
Publicado 2005
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The taxonomy of the Ribes andicola group and Urtica is investigated for the relict forests in the AmotapeHuancabamba Zone and especially the relict forests of NW Peru. Three new species of Ribes are described, Ribes contumazensis as local endemic from Contumazá, R. colandina as widespread across the Andes from Lambayeque and La Libertad to Amazonas and R. sanchezii as endemic to forests overlooking the Marañon. Additionally, Ecuadoren R. austroecuadorense is recorded for the first time from Peru from forest relics in Huancabamba (Piura) and Chota (Cajamarca). Two new species of Urtica are described, U. urentivelutina as a local endemic on the slopes overlooking the Marañon near Chagual (La Libertad), and U. lalibertadensis which is widespread in La Libertad from Otuzco to Tayabamba. Urtica longispica is reported as new to the flora of Peru and U. macbridei is reported from northern Pe...
7
artículo
Publicado 2009
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El Perú presenta aproximadamente el 10% del total de la Cuenca Amazónica y se caracteriza por ser la región con menor distribución de estaciones de lluvia, sobre todo en la Selva baja. Nosotros comparamos el producto 3B43 del Tropical Lluvia Measuring Mission (TRMM) con estaciones climatológicas en dos subcuencas (Urubamba y Tambo) del río Ucayali. La distribución espacial del producto 3B43 es de 0.25° × 0.25° (~. 27.8 × 27.8 km) y los datos son a nivel mensual. El periodo de comparación entre in-situ estaciones de lluvia y 3B43 TRMM son de Enero de 1998 a Diciembre del 2007. Comparaciones entre in-situ estaciones de lluvias observados y 3B43 fue realizado utilizando coeficiente de correlación y error relativo. Una mejora de los datos de lluvia del TRMM es luego propuesto basado en in-situ datos de lluvia. Luego del análisis del producto 3B43, 3 sets de datos de lluvia fuer...
8
tesis de grado
Publicado 2019
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La presente investigación se llevó a cabo en el ámbito de la confluencia de los ríos Mayo y Huallaga, donde se ubicaron tres estaciones de monitoreo: Rmayo1, Rhual1 y Rhual2, para la evaluación de parámetros físico-químicos y microbiológicos, a fin de determinar la influencia de la descarga del río Mayo, en la calidad de agua del río Huallaga, en el periodo comprendido entre los meses de octubre a diciembre del 2018, cuyas concentraciones variaron entre: pH (6.6 y 7.88), temperatura (24.5°C y 26.4°C), conductividad (232 μS/cm y 312 μS/cm), Oxígeno Disuelto (6.28 mg/L y 7.04 mg/L), DBO5 (valores inferiores a <2.60 mg/L), SST (29 mg/L y 2890 mg/L), Nitratos (0.062 mg/L y 0.994 mg/L), Fosforo total (0.115 mg/L y 0.503 mg/L) y Coliformes termotolerantes (130 NMP/100ml y 16000 NMP/100ml); así mismo se calculó el ICA-PE, obteniendo un valor de 71.84 (calidad regular) en Rmayo...
9
tesis de grado
Publicado 2025
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Universidad Nacional Agraria La Molina. Escuela de Posgrado. Maestría en Ciencias Ambientales
