Pablo Alvarez- Master of Science: Soil Science
- Researcher at Universidad Nacional de Loja
Pablo Alvarez
- Master of Science: Soil Science
- Researcher at Universidad Nacional de Loja
PhD(c), Karlsruhe Institute of Technology, Germany
About
28
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Introduction
Pablo Alvarez currently works at the Agricultural Faculty at National University of Loja (Ecuador) and his research focuses on Soil Sciences. Pablo is currently PhD candidate in Geoecology (soil science group) at Karlsruhe Institute of Technology, Germany, where he is working on carbon (C) and nitrogen (N) cycling in tropical ecosystems in a long-term study (>20 yr), monitoring the source and fate of C and N compounds by combining the chemistry of ecosystem solutions and C and N stable isotopes
Current institution
Additional affiliations
October 2012 - February 2017
September 2015 - February 2016
March 2015 - August 2016
Publications
Publications (28)
The globally increasing reactive N richness affects even remote ecosystems such as the tropical montane forests in Ecuador. We tested whether the δ¹⁵N values of total dissolved N (TDN), measured directly in solution with a TOC‐IRMS, can be used to help elucidate N sources and sinks along the water path and thus might be suitable for ecosystem monit...
To gain a better understanding of the global application of soil erosion prediction models, we comprehensively
reviewed relevant peer-reviewed research literature on soil-erosion modelling published between 1994 and 2017.
We aimed to identify (i) the processes and models most frequently addressed in the literature, (ii) the regions
within which mod...
To gain a better understanding of the global application of soil erosion prediction models, we comprehensively reviewed relevant peer-reviewed research literature on soil-erosion modelling published between 1994 and2017. We aimed to identify (i) the processes and models most frequently addressed in the literature, (ii) the regions within which mode...
Soil erosion can present a major threat to agriculture due to loss of soil, nutrients, and organic carbon. Therefore, soil erosion modelling is one of the steps used to plan suitable soil protection measures and detect erosion hotspots. A bibliometric analysis of this topic can reveal research patterns and soil erosion modelling characteristics tha...
The response of organic C concentrations in ecosystem solutions to environmental change changes the release of dissolved organic matter from forests to surface and groundwaters. We determined the total organic C (TOC) concentrations (filtered <1-7 µm) and the ratios of TOC/dissolved organic N (DON) concentrations, electrical conductivity (EC), and...
Systematic bibliometric investigations are useful to evaluate and compare the scientific impact of journal papers, book chapters and conference proceedings. Such studies allow the detection of emerging research topics, the analyses of cooperation networks, and the collection of in-depth insights into a specific research topic. In the presented work...
Artisanal and small-scale gold mining (ASGM) has been performed in the southern Ecuadorian Amazon since the colonial period. However, its effects on fluvial systems have been poorly investigated. Thus, in order to calculate the normalized enrichment factors (NEF) of several heavy metals in fluvial sediments of the Zamora River basin (Ecuadorian Ama...
The study was carried out to evaluate the nutritional quality of bocashi made with residues from small farms in rural areas, based on the addition of native and commercial efficient microorganisms (EM), and the fermentation time. Considering that the study area is characterized by vegetable production, Lactuca sativa L. was used as an indicator cro...
Los suelos del ecosistema de páramo se destacan por su alta capacidad de almacenamiento de carbono y retención de agua en contraste con cualquier otro tipo de suelo. Sin embargo, el cambio de uso de suelo, especialmente en los límites del páramo, debido a actividades antrópicas están poniendo en riesgo este importante servicio ecosistémico. El obje...
The paramo has great potential of carbon storage, due to the low rates of mineralization and high recycling of nutrients, as a consequence of its low temperatures. The present research was carried out with the purpose of quantifying the total carbon (soil, necromass and soil) contents of the PNP paramo ecosystem and its spatial distribution, for wh...
The páramo is a high elevation tropical Andean ecosystem with low temperatures and high precipitation, which causes low rates of mineralization and high nutrient recycling. It is a key ecosystem because of its high biodiversity, biological processes, water supply and carbon storage (Farley & Bremer, 2017; Rolando et al., 2017). However, it is one o...
El monitoreo a largo plazo en ecosistemas de alta montaña es clave para entender el impacto del cambio ambiental global en la biodiversidad. El estudio se enfocó en analizar la diversidad flo-rística existente y en determinar el contenido de biomasa vegetal dentro del ecosistema páramo en el sector Cajanuma en el Parque Nacional Podocarpus, Loja, E...
In the páramo ecosystem of the hydrographic unit Jatunhuaycu of Antisana have been characterized different levels of degradation as a result of the anthropic activity. Inside the unit was determined the amount of carbon in the biomass and soil of two states of conservation. In Six plots of 64 m2 each one were also evaluated the soil chemical proper...
Soil erosion has been one of the main causes of environmental deterioration. This research focuses on determining soil loss by water erosion and identify the most susceptible areas in Macará canton at the south of the Loja province, using the Revised Universal Soil Loss Equation (RUSLE: A=R*K*LS*C*P) and Geographic Information Systems (GIS). The Er...
The ecological footprint by 2014 in the ARNRA at NUL, which involves analyzing human demands on the biosphere by comparing the consumption with regenerative capacity of the Earth was calculated and eco-efficiency measures were proposed. The number of carbon dioxide tons (t CO2) released into the atmosphere because of the electricity, water and pape...
Land cover is a determining factor in the hydrological balance and runoff generation. The influence of land cover change in the average runoff coefficient of the upper Catamayo River Basin of the period 1986-1999 was determined by GIS and remote sensing. The methodology was divided into three phases: analysis of the real runoff coefficients from th...
Se determinó las zonas más susceptibles a erosión hídrica empleando el método RUSLE y se propuso estrategias para reducir la erosión los lugares más afectados. Los factores R, K, LS, C y P que integran la RUSLE fueron determinados y la erosión actual y potencial de la zona fue calculada.
Póster en I Congreso Ecuatoriano de Restauración del Paisaje
A la hora de planificar el monitoreo del avance de las actividades de restauración, debemos de escoger cuidadosamente los indicadores ecológicos que serán evaluados, los cuales deben representar los tres atributos del ecosistema según Ruiz-Jaen & Aide (2005): diversidad, estructura y funcionalidad. Dicha selección debe de estar basada en experienci...
Resumen Los cambios de uso del suelo han sido reconocidos como una de las principales causas de deterioro del medio natural. En este estudio se realizó un análisis multi-temporal del cambio de uso del suelo en un periodo de diez años en el cantón Zapotillo, provincia de Loja, empleando imágenes satelitales y Sistemas de Información Geográfica, con...
El fósforo (P) es un elemento limitante para la productividad de ecosistemas terrestres. Se estima que solo 0.1% del P total es absorbido por las plantas y el P en solución es insuficiente para las plantas. Una estrategia para aprovechar eficientemente el P del suelo es el uso de microorganismos solubilizadores de fosfatos (MSP). El presente trabaj...
Questions
Questions (6)
There are a great amount of studies on soil losses by water erosion. However, there is scarce information on the acceptable soil loss. I suppose there are models that can be used to determine this value, which I think are based on soil formation rate. ¿Do you know of any model or methodology to calculate it for a watershed or region?
The LS factor of the RUSLE equation varies depending on the method used. I want to know ¿Which method can be used in areas with steep slopes? and what would be the range of acceptable LS factor values for these conditions?
In research using the RUSLE equation to calculate water erosion, do not specify the values obtained in the LS factor. In some cases, cells have very high values (LS = 300, dimensionless) which cause high rates of erosion. I want to know if this value is possible and under what conditions? I think very high values can be a miscalculation.
Thanks
RUSLE model is often used to microcatchment scale. With GIS tools can be applied to largest areas as a watershed. But it is possible to work larger areas that are not necessarily basins?
