A5041182896- Water Quality and Pollution Assessment
- Soil and Water Nutrient Dynamics
- Groundwater and Isotope Geochemistry
- Isotope Analysis in Ecology
- Marine and coastal ecosystems
- Microbial Community Ecology and Physiology
- Freshwater macroinvertebrate diversity and ecology
- Public Health and Environmental Issues
- Hydrology and Watershed Management Studies
- Water Resource Management and Quality
- Environmental and Cultural Studies in Latin America and Beyond
- Fish Ecology and Management Studies
- Geological and Tectonic Studies in Latin America
- Nutritional Studies and Diet
- Geochemistry and Geologic Mapping
- Meat and Animal Product Quality
- Geology and Paleoclimatology Research
- Geophysics and Gravity Measurements
- Business, Innovation, and Economy
- Peatlands and Wetlands Ecology
- Marine Bivalve and Aquaculture Studies
- Fecal contamination and water quality
- Soil Carbon and Nitrogen Dynamics
- Marine and fisheries research
- Sodium Intake and Health
Universidad Nacional
2017-2024
University of Oxford
2024
University of Bristol
2021-2023
Water quality assessments are essential for providing information regarding integrated water resource management processes. This study presents the results of a spatial and seasonal surface assessment Burío river sub-catchment in Costa Rica. Fourteen sample campaigns were conducted at eight sites between 2005 2010. Seasonal variations evaluated using linear mixed-effects models where dissolved oxygen, total solids, nitrate showed significant differences dry wet seasons (p < 0.05). Cluster...
Water quality information is essential supporting decision making in water management processes. The lack of restricts, at some point, the implementation adequate sanitation, which still scarce developing countries. In this study, an ecosystemic assessment was conducted Virilla river Costa Rica, a section particular interest for future sanitation development. It included monitoring physical, chemical, microbiological and benthic macroinvertebrate parameters from 2014 to 2016. Mutivariate...
Abstract Vegas-Las Palmas is a rural settlement located in the southern Caribbean region of Costa Rica on border with Panama. Its population does not have access to potable water, and inhabitants depend water from wells at table level meet their needs. These lack basic infrastructure protect this contamination. In study, quality was evaluated 12 2014 2016 (n = 72). The results revealed high concentrations faecal coliforms Escherichia coli maximum values 4.6 × 104 MPN/100 mL 1.1 mL,...
Abstract The dynamic interactions between dissolved organic matter (DOM) and particulate (POM) are central in nutrient cycling freshwater ecosystems. However, the molecular-level mechanisms of such still poorly defined. Here, we study spatial differences chemical (i.e., individual proteinaceous amino acids) microbial 16S rRNA) composition suspended sediments River Chew, UK. We then applied a compound-specific stable isotope probing (SIP) approach to test potential assimilation 13 C, 15...
Urine patches in grazed systems are hotspots for nitrogen (N) cycling and losses to the wider environment. Retention subsequent recycling of urinary-N is key minimise increase ecosystem use efficiency. Biosynthesis into microbial organic N pool an important pathway but this has not been directly quantified a urine patch. Herein, we present results time course experiment using soil mesocosms sown with perennial ryegrass (Lolium perenne L.) treated 15N-labelled sheep determine partitioning...
Abstract Dissolved organic matter (DOM) plays a fundamental role in nutrient cycling dynamics riverine systems. Recent research has confirmed that the concentration of DOM is not only factor regulating its functional significance; need to define chemical composition priority. Past studies rested on bulk quantification, however technological advancements have meant there been shift towards analytical methods which allow characterisation either at compound class or more recently molecular...
Groundwater-surface water interactions are important in controlling lake residence time, biogeochemistry, and availability for downstream communities tropical volcanic catchments. To better understand these complex seasonal interactions, a multi-tracer approach including inorganic carbon stable isotopes (δ2H, δ18O, δ13CDIC), hydrochemistry, 222Rn was applied Lake Hule, northern Costa Rica. Seasonal isotope mass balance calculations using lake, stream, precipitation, groundwater compositions...
ABSTRACT Community-based water management organisations (CBWMOs) play an important role in providing services worldwide. However, there is some debate as to their capacity sustain a safe drinking supply considering the current socioeconomic and climate scenarios. Here, we present integrated quality assessment of system CBWMO Concepción San Ramon, Costa Rica. Major ions, trace metals, coliforms were analysed households sources over 1-year period. The spring risk assessments main river...
Abstract Isotope hydrological studies to understand groundwater‐surface water interactions in tropical, high‐elevation catchments are limited. These important controlling lake residence time, aqueous biogeochemistry, and availability for downstream communities ecosystems. To better comprehend the complexity of spatio‐temporal variations aquifer‐lake domain tropical volcanic regions, a multi‐tracer approach including inorganic carbon stable isotopes (δ 2 H, δ 18 O, 13 C DIC ), hydrochemistry,...
Recibido: 09/23/2014 Aceptado: 06/28/2016La Universidad Nacional, por intermedio del Laboratorio de Manejo Recurso Hídrico (LAMRHI), realiza proyectos investigación-extensión en los cuales se caracterizan físico química y biológicamente las aguas superficiales diferentes zonas país. Acompañado a esta acción procura involucrar comunidades cercanas al río para que entiendan parámetros analizan realicen acciones protección ríos. Para lograr lo anterior, desarrollan talleres teórico prácticos,...
The flux of nutrients into rivers is rising due largely to inputs from the expansion and intensification agriculture along with treatment human waste. This trend set continue changing climate increasing population while we attempt balance food security environmental impact. While water quality legislation focuses on inorganic their bioavailability, proportion total nitrogen (N) flux, which organic in its molecular composition important many riverine systems. Despite this, impact N ecosystem...
En el Golfo de Nicoya se desarrollan gran cantidad actividades antropogénicas que lo hacen vulnerable a la contaminación por sustancias como los hidrocarburos del petróleo, cuales pueden asociarse con otras partículas y quedar disponibles para biota bioacumularse en tejido lipídico organismos. La aplicación índices permite realizar una valoración presencia estos compuestos. Debido alta captura comercialización utilizó piangua, cuyas muestras obtuvieron junio 2013 diciembre 2014, digirieron...
Abstract The dynamic interactions between dissolved organic matter (DOM) and particulate (POM) are central in nutrient cycling freshwater ecosystems. However, the molecular-level mechanisms of such still poorly defined. Here, we study spatial differences chemical molecular composition suspended sediments River Chew, UK. We then applied a compound-specific stable isotope probing (SIP) approach to test potential assimilation 13 C, 15 N-glutamate (Glu) N-nitrate into proteinaceous biomass by...